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██████████ ███████▄ ███▀▀▀▀███ ███▀▀▀███ ███ ███ ▄▄▄▄▄▄▄ ▄▄▄▄▄▄▄ ▄▄▄▄▄▄▄ ███ ███ ▄▄▄▄▄▄▄ ▄▄▄▄▄▄▄ ▄▄▄▄▄▄ ▄▄▄▄▄▄▄ ███ ███ ███▀███ ███▀███ ███▀███ ███ ███ ███▀███ ███▀███ ███▀▀▀ ███▀▀▀▀ ███▄▄▄▄███ ███ ███ ███▀▀▀▀ ███ ███ ███▄▄▄███ ███ ███ ███ ███ ███ ▀▀▀▀███ ██████████ ███████ ███████ ███ ███ ███████▀ ███████ ███████ ███ ███████ ███ ███ ▀▀▀ Door Programming Toolkit ─────────────────────────────────────────────────────────────────────────── Programmer's Manual Version 5.00 MS-DOS Text Mode, C / C++ Language Edition NOTE: Since you will likely want to refer to this manual while working with OpenDoors, looking at the sample source code, or writing your own door and utility programs, it is highly recommended that you take a moment to print it out. Simply type COPY OPENDOOR.DOC PRN from your DOS prompt. With the exception of this title page, this document contains only 7-bit ASCII characters. (C) Copyright 1991 - 1994 by Brian Pirie. All Rights Reserved. TABLE OF CONTENTS TABLE OF CONTENTS ..........................................................2 CHAPTER 1 - INTRODUCTION TO OPENDOORS ......................................5 WELCOME! ..............................................................5 FEATURES OF THE OPENDOORS DOOR TOOLKIT ................................5 CHAPTER 2 - ABOUT THE DEMO VERSION AND ORDERING ............................9 THE DEMO VERSION & BENEFITS OF REGISTERING ............................9 FILLING OUT THE REGISTRATION FORM .....................................13 SENDING YOUR ORDER FEE ................................................15 ORDERING THE SOURCE CODE ..............................................17 ORDERING THROUGH COMPUSERVE ...........................................19 OPENDOORS 5.00 ORDER FORM .............................................20 OPENDOORS DOOR PROGRAMMING TOOLKIT 5.00 - USER FEEDBACK FORM ..........21 TERMS OF REGISTRATION AND SOURCE CODE USE .............................22 CHAPTER 3 - OPENDOORS TUTORIAL .............................................24 ABOUT THIS MANUAL .....................................................24 COMPILING A PROGRAM WITH OPENDOORS ....................................25 BASICS OF DOOR PROGRAMMING WITH OPENDOORS .............................28 TOUR OF A SAMPLE DOOR PROGRAM: "EZVOTE" ...............................31 OTHER EXAMPLE DOORS INCLUDED WITH OPENDOORS ...........................38 CHAPTER 4 - THE OPENDOORS API FUNCTIONS ....................................40 OVERVIEW ..............................................................40 TABLE OF MOST COMMONLY USED FUNCTIONS .................................41 TABLE OF ALL FUNCTIONS ................................................42 OD_ADD_PERSONALITY() ..................................................46 OD_AUTODETECT() .......................................................48 OD_CHAT() .............................................................50 OD_CARRIER() ..........................................................51 OD_CLEAR_KEYBUFFER() ..................................................53 OD_CLR_LINE() .........................................................55 OD_CLR_SCR() ..........................................................57 OD_COLOUR_CONFIG() ....................................................59 OD_DISP() .............................................................60 OD_DISP_EMU() .........................................................62 OD_DISP_STR() .........................................................64 OD_DRAW_BOX() .........................................................66 OD_EDIT_STR() .........................................................70 OD_EXIT() .............................................................81 OD_GET_ANSWER() .......................................................83 OD_GET_KEY() ..........................................................84 OD_GETTEXT() ..........................................................88 OD_HOTKEY_MENU() ......................................................89 OD_INIT() .............................................................91 OD_INPUT_STR() ........................................................94 OD_KERNEL() ...........................................................96 OD_LIST_FILES() .......................................................98 =============================================================================== OpenDoors 5.00 Manual End of Page 2 OD_LOG_WRITE() ........................................................100 OD_PAGE() .............................................................101 OD_POPUP_MENU() .......................................................102 OD_PRINTF() ...........................................................105 OD_PUTCH() ............................................................110 OD_PUTTEXT() ..........................................................112 OD_REPEAT() ...........................................................114 OD_RESTORE_SCREEN() ...................................................116 OD_SAVE_SCREEN() ......................................................117 OD_SCROLL() ...........................................................119 OD_SEND_FILE() ........................................................121 OD_SET_ATTRIB() .......................................................125 OD_SET_COLOUR() .......................................................128 OD_SET_CURSOR() .......................................................131 OD_SET_DTR() ..........................................................133 OD_SET_PERSONALITY() ..................................................135 OD_SET_STATUSLINE() ...................................................136 OD_SPAWN() ............................................................138 OD_SPAWNVPE() .........................................................140 OD_WINDOW_CREATE() ....................................................142 OD_WINDOW_REMOVE() ....................................................144 CHAPTER 5 - THE OPENDOORS CONTROL STRUCTURE ................................145 INTRODUCTION TO THE CONTROL STRUCTURE .................................145 CONTROL STRUCTURE - DOOR INFO FILE STATS ..............................147 CONTROL STRUCTURE - SERIAL PORT SETTINGS ..............................151 CONTROL STRUCTURE - BBS AND CALLER INFORMATION ........................156 CONTROL STRUCTURE - DOOR SETTINGS .....................................179 CONTROL STRUCTURE - DIAGNOSTICS .......................................182 CONTROL STRUCTURE - OPENDOORS CUSTOMIZATION ...........................184 CONTROL STRUCTURE - FUNCTION KEYS .....................................206 CONTROL STRUCTURE - COLOUR CUSTOMIZATION ..............................210 CONTROL STRUCTURE - TEXT CUSTOMIZATION ................................212 CHAPTER 6 - SPECIAL TOPICS .................................................215 CONFIGURATION FILE SYSTEM .............................................215 DEFINING CUSTOM DOOR INFORMATION FILE FORMATS .........................220 MULTIPLE PERSONALITY SYSTEM ...........................................223 LOG FILE SYSTEM .......................................................225 MAKING DOORS MULTI-NODE-AWARE .........................................227 CHAPTER 7 - DEBUGGING AND GETTING ASSISTANCE WITH OPENDOORS ................228 ABOUT THIS CHAPTER ....................................................228 TROUBLESHOOTING PROBLEMS ..............................................228 SOLUTIONS TO COMMON PROBLEMS ..........................................230 OPENDOORS SUPPORT .....................................................232 THE OPENDOORS SUPPORT BBS .............................................232 THE OPENDOORS SUPPORT CONFERENCE ......................................233 GETTING IN TOUCH WITH ME ..............................................233 APPENDIX A - CONTENTS OF PACKAGE ...........................................236 APPENDIX B - CHANGES FOR THIS VERSION ......................................237 =============================================================================== OpenDoors 5.00 Manual End of Page 3 APPENDIX C - FUTURE VERSIONS ...............................................243 APPENDIX D - SPECIAL THANKS ................................................245 GLOSSARY ...................................................................246 INDEX ......................................................................255 =============================================================================== OpenDoors 5.00 Manual End of Page 4 ------------------------------------------------------------------------------- CHAPTER 1 - INTRODUCTION TO OPENDOORS ------------------------------------------------------------------------------- WELCOME! ------------------------------------------------------------------------------- Welcome to OpenDoors! OpenDoors is a powerful and easy to use door programming toolkit. OpenDoors provides a complete system that allows you to EASILY and QUICKLY write spectacular, professional quality BBS doors that automatically support all the popular BBS systems. With OpenDoors, you can write door programs just as you would write any other program - without having to worry about any of the internal details of door programming. OpenDoors takes care of everything for you: It handles all modem communications, ANSI/AVATAR/RIP graphics support and BBS interfacing through door information files (such as DOOR.SYS, DORINFO1.DEF, etc.). OpenDoors also looks after status lines and sysop function keys for DOS shells, chatting, hanging up, and so on. In addition, OpenDoors carries out all the work involved in keeping track of carrier detection, user timeouts and much, much more. Serial I/O is performed using either a FOSSIL driver, or built-in serial I/O capabilities, making the use of a FOSSIL driver optional. OpenDoors can also be completely customized, allowing you to take as little or as much control of your program's behavior as you wish - and imposing no limit on the possibilities of what you can do with the package. This manual is included with the C / C++ version of OpenDoors, which can be used in conjunction with C and C++ compilers from Microsoft, Borland, and others. It is possible that versions of OpenDoors for other programming languages have been made available since the time this version was released. FEATURES OF THE OPENDOORS DOOR TOOLKIT ------------------------------------------------------------------------------- OpenDoors is a complete door programming library that allows you to write doors that DIRECTLY support one of the largest variety of BBS systems, including RemoteAccess, QuickBBS, PC-Board, Maximus, Opus, Wildcat!, WWIV, Spitfire, SuperBBS, Telegard, RBBS-PC, TriTel, GAP, and others. Are you interested in writing your own utility doors? Perhaps on-line games? Would you even like to get into the market of selling your doors for others to use? Or would you simply like make your own BBS unique by running "custom" doors? With OpenDoors, you can accomplish all of these things - and do it much more easily than ever before. =============================================================================== OpenDoors 5.00 Manual End of Page 5 Unlike other similar libraries, OpenDoors provides all the following features: - OpenDoors handles all the "dirty" work involved in writing door programs. Are you interested in writing doors for BBSes, either your own, or to distribute (even sell!) to other people? Since OpenDoors handles all the door-related operations for you, you need do next to nothing different when writing door programs than you would when writing any other program. You simply call OpenDoor's simple functions to input, output and control door operation. In fact, many people have converted non-door programs to door programs in only a matter of minutes using OpenDoors. One of the most common comments I receive about OpenDoors is how easy it is to use. - As you would expect, OpenDoors flawlessly monitors the modem's carrier detect signal, to automatically recover when a user hangs up - without your having to do anything extra in your program. OpenDoors also monitors how much time the user has left in the door, and provides a fully adjustable inactivity timeout monitor. - OpenDoors takes care of all the work involved in reading and writing BBS door information files, such as DORINFO1.DEF, EXITINFO.BBS, CHAIN.TXT, DOOR.SYS, etc. If the particular information is available to OpenDoors, it will provide you with just about everything you could ever want to know about the user on-line, the system your door is running under, and so on. In addition to the many door information file formats supported by OpenDoors, you are also able to define your own custom formats. - OpenDoors also does all the work involved in displaying and automatically updating the door's status line, with information available to the sysop such as user name, location, baud rate, time left, function keys, ANSI/AVATAR/RIP settings, and so on. Using OpenDoors, you can choose from a number of different "personalities". These personalities allows OpenDoors to mimic the status lines and sysop function keys used in various BBS packages. OpenDoors includes personalities that mimic RemoteAccess, PC-Board and Wildcat! OpenDoors also allows you to create your own personalities to mimic any other BBS system. - OpenDoors automatically provides the sysop with all the standard function keys for adjusting user time, hanging up on or even locking out the user, and so on. OpenDoors also provides you with a chat mode, which is available to the sysop by pressing Alt-C. In addition, OpenDoors has full support for sysop shell to DOS, activated by the Alt-J key. - What's more, OpenDoors is designed to be very easy to use. Even the most novice `C' programmers are able to write =============================================================================== OpenDoors 5.00 Manual End of Page 6 professional-quality doors with OpenDoors. It takes care of just about every detail for you, yet still gives you the ability to completely control and customize every detail of your door's behavior. There are even people who begin door programming with OpenDoors, having never programmed in C in the past. - OpenDoors supports both FOSSIL-based and built-in serial I/O capabilities. FOSSIL-based serial I/O can be used for maximum compatibility with various systems and serial ports, including multiple-port serial cards such as DigiBoard. OpenDoors can also operate without a FOSSIL driver, using it's own serial I/O capabilities. OpenDoor's built-in asynchronous communcations supports baud rates of up to 115,200 and non-standard serial port configurations. OpenDoors also has the ability to automatically detect which of the two serial I/O methods should be used on a particular system. - OpenDoors also automatically detects when the BBS system is operating in local mode, and supports full local mode operations itself. - Other OpenDoors functions include a built in sysop-page function that will ask the user why they wish to chat, and then proceed to page the sysop, just as any BBS package would. OpenDoors also provides screen clearing functions (which will detect whether the user has screen clearing turned on), and various ANSI/AVATAR/RIP control functions (which again detect if the user has graphics mode turned on). - In addition to the basic display features of OpenDoors there are also a number of advanced screen control functions. These include functions to save and restore the entire screen, along with functions to save, restore or scroll portions of the screen. Other functions allow you to provide overlapping windows and pop-up menus with highlighted selection bars. - OpenDoors has a number of special sub-systems that you may elect to include in your doors. Among these, is a log-file system that allows you to add log file support to your doors with only a single line of programming. - Another valuable OpenDoors sub-system is the configuration file system. Again using only a single line of code, you can add configuration file support to your doors. OpenDoors configuration files permit the sysop using the door to customize the door's performance to their own preferences. Among the settings available in the configuration file are system directories, screen colours, maximum time permitted within the door, sysop paging hours, memory swapping options. The sysop can also specify a custom door information file (drop file) format, to allow your doors to operate on literally ANY BBS system. =============================================================================== OpenDoors 5.00 Manual End of Page 7 - OpenDoors can also be fully customized in order that you may write door programs that use languages other than English. - Among the ANSI/AVATAR/RIP features found in OpenDoors is the ability to send ANSI/AVATAR/RIP files from disk. This allows you to easily design program screens, and incorporate them into your doors. - OpenDoors also comes with the source code for a number of example doors, which you can modify, or simply extract bits and pieces for use in your own doors. Plus, this manual contains many examples of C source code, to help you in writing nearly any door program you might wish to build. - OpenDoors is also DesqView aware. When OpenDoors starts up, it will automatically check for the presence of DesqView, and if available, will perform all of it's screen output through DesqView. - You may also elect to purchase the source code for OpenDoors, which will permit you to make modifications to any portion of OpenDoors, use any portions of the OpenDoors source code in other programs you write, or merely learn how communications- type programs are written. =============================================================================== OpenDoors 5.00 Manual End of Page 8 ------------------------------------------------------------------------------- CHAPTER 2 - ABOUT THE DEMO VERSION AND ORDERING ------------------------------------------------------------------------------- THE DEMO VERSION & BENEFITS OF REGISTERING ------------------------------------------------------------------------------- This archive contains the demonstration version of OpenDoors. This version has all the features of the registered version, but you are only permitted to use it under limited circumstances: 1.) The demo (unregistered) version may only be used for a one month period, for evaluation purposes. 2.) Programs written in this version may not be distributed. Also, any program written with the demo version will display a message to the user indicating that OpenDoors is not registered. This message is, of course, removed in the registered version. If you decided to purchase OpenDoors, you will become the owner of a powerful tool for creating BBS door and utility programs. Registered owners of OpenDoors are entitled to: 1.) Unlimited use of OpenDoors. You may write as many programs as you wish using OpenDoors, and do what you please with these programs. They may be freely distributed, or even sold. What's more, there are no additional royalty fees. Your one time purchase of OpenDoors entitles you to use it as you please. 2.) You will also be entitled to free upgrades to newer versions of OpenDoors. In addition to the great many features and the quality that this version of OpenDoors has to offer, I am currently working on a great many additions and enhancements for the next version. (See the end of this document for an outline of features currently "in the works") Any programs you write in this version will also automatically take on these new features when you receive the new version. The best news of all is how cheap OpenDoors is! Other "door- drivers" sell for $50, $75, or even more! However, this version of OpenDoors will only cost you $28 US, $34 Canadian, or your countries equivalent! (Also, you may be interested in knowing that the price will go up in future versions, so if you register now, you will save by receiving ALL future upgrades for free.) Also, the source code for OpenDoors is now available to registered users for an additional $28US / $34CDN / equivalent! Ordering a copy of the source code will allow you to customize =============================================================================== OpenDoors 5.00 Manual End of Page 9 OpenDoors for your own use, making any changes or additions that you wish. It also gives you the opportunity to see how OpenDoors works, and to use any portions of the OpenDoors code in any other programs you wish to write. If you think you might be interested in ordering the OpenDoors source code, please be sure to read the section entitled "Ordering The Source Code", located on page 22. =============================================================================== OpenDoors 5.00 Manual End of Page 10 HOW TO ORDER ------------------------------------------------------------------------------- PLEASE Below are detailed instructions for registering OpenDoors. NOTE These instructions are not intended to be confusing or complicated; they are simply meant to answer almost any question that you might have about registering. However, note that it is probably not necessary for you to worry about whether you are following these steps to the letter - I'm not that picky. So long as you send your registration form and fee by some means, there should not be any difficulty in processing your registration. If you do have any questions or uncertainties about your registration, please feel more than free to contact me. For information on how to contact me, please see page 233. OpenDoors can be ordered by either mailing the OpenDoors order form, or online on Compuserve. If you are a Compuserve subscriber and you wish to order OpenDoors by this means, see the secton on ordering through Compuserve, on page 19. Otherwise, follow the following three steps: 1.) Fill out the registration form. Information on filling out the form is located on page 13. 2.) Send the appropriate payment, $28US/$34CDN/equivalent for the registration or $56US/$68CDN/equivalent for both the registration and source code. If you wish more detailed instructions on sending the registration fee, see the section that begins page on 15. Included in that section is a list of equivalent prices for a number of other countries. 3.) Send the above two items (along with a diskette and envelope if you are ordering the source code, and wish to receive it by conventional mail) to me at: Brian Pirie Apt. 1416 - 2201 Riverside Dr. Ottawa, Ontario Canada K1H 8K9 If you think you might also be interested in the OpenDoors source code, be sure to read the section on the source code, which begins on page 22. Also, you may wish to send the OpenDoors feedback form (located on page 21), along with your registration. The feedback form gives you a chance to tell me what you think of OpenDoors, and =============================================================================== OpenDoors 5.00 Manual End of Page 11 what changes you would like to see in future versions. In fact, the majority of suggestions made on these forms in the past have already been implemented in the current version of OpenDoors. =============================================================================== OpenDoors 5.00 Manual End of Page 12 FILLING OUT THE REGISTRATION FORM ------------------------------------------------------------------------------- If you have printed the OpenDoors manual, you can simply remove and mail the forms on pages 20 and 21. If you have not already printed a copy of the manual, and you have a printer, you can quickly print these forms by printing the ORDER.FRM file included in the OpenDoors distribution archive. (Type COPY ORDER.FRM PRN from your DOS prompt.) NO PRINTER? Alternatively, if you do not have a printer, simply send a hand- written version of the order form. If you have any special instructions for me, or anything that you would like to say when you register, feel free to write this on the back of the registration form, or on a separate piece of paper. When filling out the OpenDoors registration form, be sure to indicate how you would prefer to receive your OpenDoors registration key and/or source code. The following options are available: - Having me send the registration and/or source code by conventional mail - Having me call to your BBS - You calling the OpenDoors support BBS - FidoNet "CrashMail" - Internet E-Mail Once you have decided which means you would prefer to receive your order by, please read the detailed instructions on your order method, below. Also, if you are ordering the source code, please be sure to read the section on ordering the source code, which begins on page 22. ------------------------------------------------------------------------------- RECEIVING In order to receive your OpenDoors registration key and/or ORDER source code by conventional mail, simply fill out the order BY MAIL form and mail it along with your payment as described below. I will cover the cost of postage. If you are ordering the source code (requiring the mailing of a diskette), or your address contains non-Arabic characters, also enclose a self-addressed envelope. If you are also ordering the source code, please be sure to enclose either a 5-1/4" 360K or 3-1/2" 720K/1.44M floppy disk. =============================================================================== OpenDoors 5.00 Manual End of Page 13 ------------------------------------------------------------------------------- RECEIVING In order to receive your OpenDoors registration key and/or ORDER BY source code by a message and/or upload to your BBS, fill out CALL TO the order form and mail it along with your payment as described YOUR BBS below. Be sure to include the phone number, baud rate, and my login and password for the BBS to which you would like me to call. As always, I will cover any long distance costs. If, for some reason, I am unable to connect to your BBS (not because it is busy, but, for example, if your BBS is no longer online), I will send your order by conventional mail instead. ------------------------------------------------------------------------------- RECEIVING You may choose to receive your OpenDoors registration and/or ORDER BY source code by calling the OpenDoors BBS after your registration CALLING form and order fee have been received here. If you are unable to OPENDOORS receive your order by any other electronic means (such as a call BBS to your BBS, or by electronic mail), this may be the quickest way for you to recieve your registration information and/or source code. The obvious disadvantage with to option is the fact that you will have to estimate when your order will arrive here in order to receive it as quickly as possible. You may end up calling the OpenDoors BBS more than once before your order has arrived. After your order form has arrived, your registration key and/or source code will be placed on hold for you, and you will be able to receive it on your first call to the BBS. The phone number of the BBS is: +1 613 526 4466 ------------------------------------------------------------------------------- RECEIVING If you wish to receive your OpenDoors registration key by ORDER BY Internet E-Mail (including Internet E-Nail to a Compuserve INTERNET account), fill out the order form and mail it along with your E-MAIL payment as described below. Be sure to include your e-mail address on your order form. Note that the source code cannot be sent via Internet e-mail. ------------------------------------------------------------------------------- RECEIVING In order to receive your OpenDoors registration key and/or ORDER BY source code by FidoNet CrashMail, simply fill out the order FIDONET form and mail it along with your payment as described below. CRASHMAIL Be sure to include the FidoNet node address to which you wish to have your registration key and/or source code sent to (via CrashMail). Again I will cover any long distance costs. If, for some reason, I am unable to connect to your FidoNet system, I will send your order by conventional mail instead. =============================================================================== OpenDoors 5.00 Manual End of Page 14 SENDING YOUR ORDER FEE ------------------------------------------------------------------------------- The price of OpenDoors is 34 Canadian Dollars, 28 U.S. Dollars, or equivalent for the registration. The source code costs an additional 34 Canadian Dollars, 28 U.S. Dollars, or equivalent. For your convenience, the equivalent value in a number of other country's currencies, at the time of this writing, is as follows: ----------------------------------------------- REGISTRATION REGISTRATION ONLY AND SOURCE CODE ----------------------------------------------- 34 Canadian Dollars 68 Canadian Dollars 28 US Dollars 56 US Dollars 18 British Pounds 36 British Pounds 150 French Francs 300 French Francs 44 German Marks 88 German Marks 50 Netherland Gilders 100 Netherland Gilders 39 Australian Dollars 78 Australian Dollars ----------------------------------------------- This order fee may be payed using any of the following methods: -Cheque or Money Order in Canadian currency, drawn upon a Canadian bank. In this case, your order fee will be either $34CDN for just the registration, or $68CDN for both the registration and source code. -Cheque or Money Order in U.S. currency, drawn upon a U.S. bank. In this case, your order fee will be either $28US for just the registration, or $56US for both the registration and source code. -An International Money Order or International Bank Draft (available from your bank, post office or organization such as American Express), in Canadian currency. Depending on the particular case, your order fee MAY be sent to me by the postal service, and you will mail your order form by itself. You should have the money order drawn in either $28CDN for just the registration, or $56CDN for both the registration and source code. -A cheque drawn on any bank in the world, IN THAT COUNTRY'S CURRENCY, equivalent to 34 Canadian dollars. For instance, a cheque for the appropriate number of British Pounds, drawn on a British bank, is perfectly acceptable. However, I am unable to accept a cheque for $34 Canadian dollars, drawn on a British Bank. =============================================================================== OpenDoors 5.00 Manual End of Page 15 -Cash. Please note that it is not usually recommended that cash be sent in the mail, and that I cannot be responsible for any cash lost in the mail. Simply put, if you wish to order by cash, it is your responsibility to get the cash to me. However, if I do receive your order in the form of cash, it will be perfectly acceptable to me. I would like to mention that many people have already ordered OpenDoors by sending cash, and I have yet to run across any case of cash being lost in the mail. Nonetheless, if you wish to send cash, you may wish to consider doing so by registered mail, for your added security. If you are ordering OpenDoors from within Canada, you will most likely choose the first option (a Canadian cheque or money order). If you are ordering OpenDoors from within the United States, you will most likely choose the second option (an American cheque or money order). If you are ordering from outside Canada and the U.S., it would be ideal if you could send your fee by an international money order. However, it should be noted that any of the above order methods will be acceptable from any location. Also, it is quite possible that I may be able to accept other means of sending your order fee. If you are unsure about sending your order fee, please feel free to get in touch with me by any of the means listed on page 233. =============================================================================== OpenDoors 5.00 Manual End of Page 16 ORDERING THE SOURCE CODE ----------------------------------------------------------------------------- There are many benefits to also ordering the source code along with your OpenDoors registration. Ordering the source code will allow you to customize OpenDoors for your own use, use parts of the OpenDoors source code in other programs, and learn more about how OpenDoors works. If you have any ideas for changes that you would like to see in OpenDoors, either large or small, ordering the source code will allow you to makes these changes yourself, creating your own customized version of OpenDoors. You will be able to remove copyright notices, change the way certain OpenDoors functions work, or add new capabilities to OpenDoors in surprisingly little time. You will also be able to use any of the OpenDoors source code, be it the DesqView-aware code, EMS/disk swapping routines, configuration file system, communications routines, or anything else, in any other programs that you may wish to write. Also, ordering the OpenDoors source code will allow you to learn more about how OpenDoors works, and how to program communications software, door programs, BBS utilities, and so on. As mentioned before, registered users may order the OpenDoors source code for an additional $28, either at the same time you register OpenDoors, or separately. If you wish to order the OpenDoors source code, simply indicate on your order form that you wish to order both your OpenDoors registration, and your source code, and include the additional fee for ordering the source code. When you order the OpenDoors source code, you will receive the source code package. The source code package includes all of the source code, with the exception of the registration key decoding algorithm. This small piece of code is instead included in the form of .OBJect files, one for each memory model. The source code package also includes a short "Source Code Manual", with a description of how the OpenDoors source code is organized, instructions on how to recompile the source code, and more. In addition, the source code package includes a full set of batch files for automatically re-compiling the OpenDoors libraries. REQUIREMENTS In order to re-compile the OpenDoors source code, you must be using a Borland compiler that supports inline assembly language keywords. This includes Turbo C++ or Borland C++ 2.0 or later. Also, as with your OpenDoors registration, when you order the OpenDoors source code, you are entitled to receive all future versions of the source code. =============================================================================== OpenDoors 5.00 Manual End of Page 17 IMPORTANT If you wish to order the source code there are a few important things which you should note. First of all, if you choose to receive your source code by mail (as opposed to upload to your BBS, or FidoNet CrashMail), be sure to enclose a Double-Density 5-1/4" diskette with mailing envelope, or either Double-Density or High-Density 3-1/2" diskette. Also, due to the costs of over- seas long distance, I cannot send the source code by BBS upload or CrashMail to sites outside of North America that operate at 2400 bps or slower. =============================================================================== OpenDoors 5.00 Manual End of Page 18 ORDERING THROUGH COMPUSERVE ------------------------------------------------------------------------------- As an alternative to mailing a cheque / money order / cash along with the OpenDoors order form, you can order an OpenDoors online on Compuserve. The cost of OpenDoors will automatically be billed to your CompuServe account. Unless you have previously notified me that you wish to receive your order by some other means, your order will be set by conventional mail. To order OpenDoors online through CompuServe, GO SWREG. The registration ID for ordering JUST the OpenDoors registration ($28U.S. at the time of this writing) is 3270. The registration ID for ordering BOTH your OpenDoors registration and the OpenDoors source code ($56U.S. at the time of this writing) is 3271. Note that the price for registering OpenDoors through CompuServe may increase to 15% more than the price for ordering OpenDoors through the mail, due to the high processing fee I am charged by CompuServe. However, the price for ordering online through CompuServe is currently the same as for ordering by any other means. The price that you will be paying to order through CompuServe will be displayed before you agree to the registration, so you will know whether or not the price has changed before purchasing OpenDoors. =============================================================================== OpenDoors 5.00 Manual End of Page 19 -------------------------------------------------------------------------- OPENDOORS 5.00 ORDER FORM -------------------------------------------------------------------------- YOUR NAME : _______________________________ (AS SHOULD APPEAR IN REGISTRATION) POSTAL ADDRESS : ______________________________________________________ ______________________________________________________ VOICE PHONE NUMBER : ______________________ E-MAIL ADDRESSES : ____________________________________ (IF APPLICABLE) BBS PHONE NUMBER : ______________________ (IF APPLICABLE) BEST TIME TO CALL : __________________ BRIAN'S PASSWORD : __________ (ONLY IF YOU WISH TO RECEIVE YOUR ORDER BY A MESSAGE ON YOUR BBS) I WISH TO RECEIVE MY ORDER BY: ___ ___ | | - CONVENTIONAL MAIL | | - FIDONET "CRASHMAIL" |___| |___| ___ ___ | | - CALL TO MY BBS | | - INTERNET E-MAIL |___| |___| (REGISTRATION KEY ONLY) ___ ___ | | - CALL TO OPENDOORS BBS | | - COMPUSERVE MAIL |___| |___| (REGISTRATION KEY ONLY) ___ I WOULD LIKE TO ORDER: | | - JUST MY REGISTRATION KEY |___| ($28 or EQUIVALENT) ___ | | - JUST THE SOURCE CODE (ONLY IF ALREADY |___| REGISTERED) ($28 OR EQUIVALENT) ___ | | - BOTH REGISTRATION KEY AND SOURCE CODE |___| ($56 OR EQUIVALENT) I AGREE TO THE OPENDOORS TERMS, SET ____________________________ FORTH ON PAGE 22 OF THE MANUAL (SIGNATURE) MAKE CHEQUES PAYABLE TO: BRIAN PIRIE APT. 1416 - 2201 RIVERSIDE DR. OTTAWA, ONTARIO CANADA K1H 8K9 +-- OFFICIAL USE ONLY ----------------------------------------------------+ | | | Rcvd : _______ Date : _________ S.N. : _________ Key : _____________ | +-------------------------------------------------------------------------+ =============================================================================== OpenDoors 5.00 Manual End of Page 20 -------------------------------------------------------------------------- OPENDOORS DOOR PROGRAMMING TOOLKIT 5.00 - USER FEEDBACK FORM -------------------------------------------------------------------------- YOUR NAME : _______________________________ POSTAL ADDRESS : ______________________________________________________ ______________________________________________________ VOICE PHONE NUMBER : ______________________ NETWORK ADDRESSES : ____________________________________ (IF APPLICABLE) HOW DID YOU FIRST LEARN OF OPENDOORS? ____________________________________________________________ WHICH LANGUAGE / COMPILER AND VERSION ARE YOU USING? (EG. BORLAND C++ 3.10) ____________________________________________________________ WHAT DO YOU LIKE MOST ABOUT OPENDOORS? ____________________________________________________________ ____________________________________________________________ ____________________________________________________________ WHAT CHANGES OR ADDITIONS WOULD YOU LIKE TO SEE IN FUTURE VERSIONS? ____________________________________________________________ ____________________________________________________________ ____________________________________________________________ DO YOU HAVE ANY ADDITIONAL COMMENTS? ____________________________________________________________ ____________________________________________________________ ____________________________________________________________ ----------------------------------------------------------------------------- =============================================================================== OpenDoors 5.00 Manual End of Page 21 TERMS OF REGISTRATION AND SOURCE CODE USE ----------------------------------------------------------------------------- When you purchase an OpenDoors registration and/or source code, you are entitled to almost unlimited use of all versions of OpenDoors. However, in order to protect my investment of time and effort in developing OpenDoors, you must also agree to the terms outlined below when purchasing an OpenDoors registration and/or the source code. These terms are very reasonabl, and are in no way intended to limit your use of OpenDoors. The primary intent of these terms is that you are not permitted to disclose your OpenDoors registration information, or the OpenDoors source code, to other individuals. The exception to this requirement is when OpenDoors is registered by an organization, the OpenDoors registration information and source code may be shared among members of that organization, for use within the organization. For instance, if OpenDoors is registred to a particular company, only a single registration is required for the company, but it may not be used by employees for their personal use. The terms of registration and source code use are as follows: For the purpose of these terms, "OpenDoors" is defined to be the library files, header files, example programs and programmer's manual of all versions, past and present, for all languages and platforms of the OpenDoors door programming toolkit. Upon registering OpenDoors, the individual or organization named on the registration form (the registree) is entitled to use of all versions of OpenDoors, within the terms set forth below. Violation of these terms will be considered copyright infrindgement, and grounds for the termination of the registration agreement. The registree is entitled, at no additional cost, to use, distribute or sell the executable (.EXE or .COM) files that result from using the OpenDoors door programming toolkit. The registree is also entitled to use, distribute or sell the example programs, example configuration files and portions of the user manual. If purchasing the source code, the registree is also entitled to distribute any executable files that result from using altered versions of the source code, or portions thereof. The registree is NOT entitled to distribute the registration key number presented to them at registration, or any portions of the OpenDoors source code. For the purposes of these terms, an organization is considered to be a company or non-profit organization. If the registree is an organization, the registration key and source code may be shared among members of the organization, under the condition that these individuals are using the registration and/or source code only for official activities of that organization. These terms in no way suggest an agreement on the part of Brian Pirie to develop any future versions of OpenDoors, or fix any bugs in current versions of OpenDoors. OpenDoors is offered "as is", and =============================================================================== OpenDoors 5.00 Manual End of Page 22 no warantees are expressed or implied. In no event shall Brian Pirie be liable for any loss of profit or any other damage, including but not limited to special, incidental, consequential or other damages. =============================================================================== OpenDoors 5.00 Manual End of Page 23 ----------------------------------------------------------------------------- CHAPTER 3 - OPENDOORS TUTORIAL ----------------------------------------------------------------------------- ABOUT THIS MANUAL ----------------------------------------------------------------------------- The OpenDoors programmer's manual is intended to serve as a complete tutorial, guide and reference to writing programs with OpenDoors. Chapter 1 of this manual, beginning on page 5, serves as an introduction and overview of the features of OpenDoors. Chapter 2, beginning on page 9, then contains all of the information related to this demo version of OpenDoors, and how to register your copy. This chapter then serves as a tutorial on OpenDoors and door programming in general. Chapter 4 then deals with the functions which OpenDoors provides for door programming. Chapter 5 deals with the "OpenDoors control structure", which gives you access to a wide array of information, and allows you to customize OpenDoor's appearance and behaviour. Chapter 6 provides information on special OpenDoors features and special topics related to door programming. Among the subjects discussed in chapter 6 are configuration files, multi-node operation, RIP graphics, logfile support, defining custom door information file formats, and more. Chapter 7 (which begins on page 228) is perhaps the most important single part of this manual. This chapter gives detailed instructions on troubleshooting programs written with OpenDoors, lists solutions to common difficulties, and has information about the many sources for OpenDoors support. If at any time you are having difficulty with OpenDoors, be sure to refer to this chapter for complete step-by-step instruction on tracing the source of your problem, and for solutions to common difficulties with OpenDoors. This chapter also directs you to some of the many means of OpenDoors support, including information on the OpenDoors EchoMail conference, the OpenDoors support BBS, and how to get in touch with me. You will also find many useful tools in this manual, which will no doubt come in useful while working with OpenDoors. Beginning on page 2 is a basic table of contents, showing you have the manual is organized, and helping you to locate general topics. At the end of the manual, beginning on page 255, is an index to help you locate more information on specific topics. The manual also includes a glossary, on page 246, which will help you in understanding new terms that you may come across while reading the manual. At the end of the manual, you will also find several useful section, such as a brief history of OpenDoors, =============================================================================== OpenDoors 5.00 Manual End of Page 24 information on how to contact us, and information about new OpenDoors features currently in the works. It is suggested that if you wish to get the most out of OpenDoors, that you carefully read the sections of the manual that describe the use of the features you are using, and at least skim other portions of the manual to find out what additional features are available. Also, you will likely want to print this manual, to make reading and reference while programming easier. To print this manual, simply type the following line from your DOS prompt: COPY OPENDOOR.DOC PRN: COMPILING A PROGRAM WITH OPENDOORS ------------------------------------------------------------------------------- The process of compiling a program written with OpenDoors is very similar to that of compiling any other program. However, there are two additional steps which you must be sure to remember: 1.) You must include the OPENDOOR.H header file. 2.) You must link your program with the appropriate OpenDoors library file. All programs written with OpenDoors, must "include" the OPENDOOR.H header file. If you have placed the OPENDOOR.H header file in the same directory as your door's source code, place the following line at the beginning of your .C or .CPP file(s): #include "opendoor.h" If you have placed the OPENDOOR.H header file in the same directory as other standard header files (such as stdio.h), place the following line at the beginning of your .C or .CPP file(s): #include <opendoor.h> In addition to including the OpenDoors header file in your source code modules, you must also "link" the OpenDoors library file with your program. The procedure for doing this depends upon which compiler you are using. The next few paragraphs describe how to link with the OpenDoors libraries using a various compilers. Following that I explain how to choose the appropriate library for the memory model you are using. =============================================================================== OpenDoors 5.00 Manual End of Page 25 If you are using Borland Turbo C 2.00 or earlier, you can cause your compiler to link your program with the OpenDoors library by creating a text file with a .PRJ extension. In this text file, you should list the names of your program's .C modules, along with the name of the appropriate OpenDoors library file, as listed in the table at the end of this section. You should then select this Project file from within the Turbo C IDE prior to compiling your program. If you are using Turbo C++ or Borland C++, you can cause your compiler to link your program with the OpenDoors library by creating a project file from within the IDE. To do this, choose the Open Project command from the Project menu, and eter the name for your new project file in the Load Project dialog box. Then add the names of your program's .C/.CPP modules, along with the name of the appropriate OpenDoors library file, by pressing [Insert] in the project window. When you return to Turbo C++ or Borland C++ again, you can work with the same project file by using the Open command from the Project menu. If you are using any Microsoft C compiler, such as Quick C, Microsoft C or Visual C++, you can cause your compiler to link your program with the OpenDoors library by creating a makefile. You can create a new project file from within Quick C by using the Set Program List option from the Make menu. You can do this from within Visual C++ by using the New command from the Project menu. You should add the names of your program's .C/.CPP source files, along with the name of the appropriate OpenDoors library file, to the newly create makefile. For more information on how to link your program with third- party library files such as OpenDoors, consult the manuals that are included with your compiler. There are a number of different library files included with OpenDoors, each one for use with a different memory model. The following chart lists the library file names, along with their corresponding memory model. It is important that you use the library file which corresponds to the memory model you are using. Whenever you change your compiler to use a different memory model, it is important to rebuild all of your source files (using the "Build All" or "Rebuild All" command) in addition to changing the library that your program is being linked with. If you are unfamiliar with the concept of memory models, you should refer to your compiler's manuals. If you are unsure as to what memory model your compiler is currently using, check this setting in the compile options dialog box or command line reference information. =============================================================================== OpenDoors 5.00 Manual End of Page 26 +------------------------------------------------+ | Library | Memory | | Filename | Model | |-------------|----------------------------------| | ODOORS.LIB | The Small memory model library | | | | | ODOORM.LIB | The Medium memory model library | | | | | ODOORC.LIB | The Compact memory model library | | | (Available separately) | | | | | ODOORL.LIB | The Large memory model library | | | | | ODOORH.LIB | The Huge memory model library | +------------------------------------------------+ To understand how to compile a program written with OpenDoors, it is a good idea to try compiling one of the example programs, such as ex_hello.c, that are included in the OpenDoors package. =============================================================================== OpenDoors 5.00 Manual End of Page 27 BASICS OF DOOR PROGRAMMING WITH OPENDOORS ------------------------------------------------------------------------------- This section provides a complete tutorial to the basics of door programming with OpenDoors. It is important that you read this section. While OpenDoors allows you to write door programs in almost the same manner as you would any "normal" program, there are a few things which you must keep in mind, in order that your programs function correctly. You are also encouraged to look at the sample doors included with OpenDoors. These programs, which are described beginning on page 38, will give you a much better idea of what an OpenDoors program will look like, and provides you with a starting point for writing your own door programs. Probably the best means of introduction to door programming with OpenDoors is by doing it yourself. As such, I strongly encourage you to try typing in, compiling and running the simple introduction program below. For instructions on compiling programs written with OpenDoors, see page 25. #include "opendoor.h" main() { od_printf("Welcome to my first Door!\n\r"); od_printf("Press a key to return to BBS!\n\r"); od_get_key(TRUE); } Keep in mind that even this simple program will automatically have all of the door capabilities we have already mentioned. Notice the inclusion of the OPENDOOR.H file. All doors written with OpenDoors must include the OPENDOOR.H header file in order to compile correctly. The first two lines in the main function simply call the OpenDoors od_printf() function. od_printf() is similar to the printf() function that C programmers will already be famailiar with. However, unlike printf(), the od_printf() function sends the output to both the modem and the local screen. Notice that the lines of text displayed by the od_printf() function end with a "\n\r" sequence, instead of the normal "\n". This is because hte terminal emulation software that is running on the remote user's system usually requires both a carriage return and a line feed to correctly begin a new line. The next line in our example program is the OpenDoors single-key input function, od_get_key(). The TRUE value causes OpenDoors to wait for a key to be pressed (again, either from remote or local keyboard) before returning. Once again, you are encouraged to try compiling and running this program on your own BBS setup, as described above. =============================================================================== OpenDoors 5.00 Manual End of Page 28 Congratulations, you have written your first door program! Feel free to make any changes to this program, and see what effects your changes have. In case you are not entirely familiar with the operation of door programs, we will now provide an introduction to the internals of a door's operation. Keep in mind that OpenDoors automatically carries out most of these tasks for you. When any door program starts up, one of the first things it must do is to read the door information file(s) (sometimes called a "drop file") passed to it by the BBS. When a user is on-line, and wishes to run a door, they will most likely select a command from a menu. At this point, the BBS system (such as RemoteAccess, Maximus, PC- Board or whatever), will create a file of information about the system, who is currently on-line, and so on. Various BBS packages produce various styles of door information files. OpenDoors automatically recognizes and reads a wide variety of door information file formats. As a result, your doors will be able to run on a almost any BBS system. The door itself will actually be loaded in one of two manners. Either the BBS will perform a "shell" and run the door while the BBS system resides in memory (sometimes called a type 7 exit), or it will exit to a batch file, which will trap an errorlevel and run the appropriate door program. (sometimes called a type 15 exit). In either case, when the door gains control, it will first read the door information file(s), and then begin to communicate through the modem. Fortunately, OpenDoors takes care of all the work involved in detecting and reading the door information file, and then initializing and communicating with the serial port for you. In order to carry out these tasks, along with setting up the status line, and so on, OpenDoors provides a function called od_init(). If you do not explicitly call this function, the first call to any other OpenDoors function (such as the first time your door program outputs anything) will automatically cause the od_init() function to be called. As a result, upon the first call to an OpenDoors function, all of the initialization tasks for the door will automatically be carried out. However, there may be times when you will want your program to have access information about the user who is on-line, or carry out other actions which require od_init() to have been executed - prior to the point where you call any other OpenDoors functions. In this case, you will have to call od_init() yourself before you do any of these things. OpenDoors provides you with a C/C++ structure, by the name of od_control, which allows you to access all the available information about the user who is on-line, the system your door is running on, and also allows you to adjust various OpenDoors parameters. Depending on what BBS system your door is running under, the actual information available from the od_control structure will vary. For more information on the od_control =============================================================================== OpenDoors 5.00 Manual End of Page 29 structure, see the section on the control structure, beginning on page 145. Once the door has initialized itself, it will then begin communications with the user who is online. OpenDoors takes care of all communications, through its various input and display functions. When the door has finished, it will then write any information that has changed back to the door information file (if applicable), finish communicating with the modem, and return to the BBS. In OpenDoors, these shut-down operations are automatically performed when your C or C++ program exits normally. If you wish to explicitly control OpenDoor's behaviour when exiting, you may exit the door program by calling the od_exit() function. This function will terminate the door's activity, OPTIONALLY hang up on the user (allowing you to provide either return to BBS or logoff options for exiting), and then exit with the specified errorlevel. One other important OpenDoors function that you should be aware of is the od_kernel() function. od_kernel() is the central OpenDoors control function, and is responsible for much of OpenDoor's updating of the status line, monitoring the carrier detect and user timeout status, responding to sysop function keys, and so on. The od_kernel() function is called automatically by OpenDoors, within the other OpenDoors functions. As a result, since most door programs will call some OpenDoors function on a regular basis, you will most often have no need to call the od_kernel() function yourself. However, if your door is going to perform some action, such as updating data files, during which it will not call any OpenDoors function for more than a few seconds, you should then call the od_kernel() function yourself. For more information on the od_kernel() function, see page 96. For more information on the functions available from OpenDoors, or the control structure, see the corresponding sections in this manual. I would also suggest that you have a look at the sample door included with OpenDoors, EZVote. =============================================================================== OpenDoors 5.00 Manual End of Page 30 TOUR OF A SAMPLE DOOR PROGRAM: "EZVOTE" ------------------------------------------------------------------------------ One of the best ways to see how OpenDoors works, and the potential that it has, is to look at the source code for the included sample door programs. A brief description of each of these programs can be found on page 38. This section takes a closer look at one of the example programs, "EZVote". In your OpenDoors package you will find five .C source files for the EZVote program, named EX_VOTE1.C to EX_VOTE5.C. Each of these source files shows a further step in the process of building the EZVote program. EX_VOTE1.C lays the foundation with the code to display the main menu and respond to basic commands such as exiting the program. EX_VOTE2.C adds the user interface for the remaining commands, EX_VOTE3.C adds the underlying data file code, EX_VOTE4.C adds color and EX_VOTE5.C adds the finishing touches. You will probably want to begin by looking at EX_VOTE1.C, and then proceed to see the additions made to subsequent versions of the program. Don't be taken back by the complexity of the EZVote program - most of the source code is involved in accessing the data files used by this program, which is actually more complicated than many door programs will require. The OpenDoors package includes a compiled version of EZVote, which you can run by typing EZVOTE. The OpenDoors package also contains a sample door information file, DORINFO1.DEF. You can use this file to test any doors in local mode. If you wish to manually create your own DORINFO1.DEF file, you can do so very easily. The DORINFO1.DEF door information file is a simple text file which lists a different piece of information on each line, in the following format: +----------------------------------------------------------+ | LINE NUMBER | DESCRIPTION | EXAMPLE | +-------------+------------------------+-------------------| | 1 | Name of the BBS | MY OWN BBS | | 2 | Sysop's first name | BRIAN | | 3 | Sysop's last name | PIRIE | | 4 | Com Port modem is on | COM0 | | 5 | Baud rate, etc. | 0 BAUD,N,8,1 | | 6 | Unused | 0 | | 7 | User's first name | JOHN | | 8 | User's last name | PUBLIC | | 9 | Caller's location | OTTAWA, ON | | 10 | ANSI mode (0=off, 1=on)| 1 | | 11 | User's security level | 32000 | | 12 | User's time left | 60 | +----------------------------------------------------------+ =============================================================================== OpenDoors 5.00 Manual End of Page 31 Feel free to make any changes you wish to the EZVote, and recompile it. One of the most effective and enjoyable ways to learn OpenDoors is by experimenting. If you are a registered owner of OpenDoors, you may even distribute your own versions of this door. Also, you may find that EZVote serves as a good framework for building your own door programs. The EZVote door behaves similarly to most other door programs, and will have a fair bit in common with any other door you write in OpenDoors. What you see in the output window is identical to what a remote user will be seeing. If the user has ANSI, AVATAR or RIP mode turned on, you will see the same colours as they do, and if they have screen clearing turned on, your screen will be cleared when theirs is. The status line at the bottom of the screen will list the name of the user currently on-line (if you are using the sample DORINFO1.DEF file, the user's name will be "The Sysop"), the user's location, and the user's baud rate (0 if the door is operating in local mode). You will also be told how much time the user has left, and there will be indicators as to whether the user has ANSI/AVATAR/RIP modes turned on, and so on. If the user wishes to Chat with the sysop (ie, they have paged the sysop, but haven't receive a response yet), a [Want- Chat] indicator will be flashing on the status line. Try Paging the sysop, using OpenDoors built in sysop page feature. The following function keys will also be available to the sysop in any OpenDoors program: [UP]/[DOWN] - Use the arrow keys to increase or decrease the amount of time which the user has left in the door. [Alt]-[C] - Allows the sysop to break into chat with the user at any time. [Alt]-[C] again, or [ESC] will end chat mode. (Notice that the Want-Chat indicator will also be turned off, if it was flashing. If your door is running under Apex, RemoteAccess or QuickBBS, paging from within the door will even cause the Want-Chat indicator to stay lit when the user returns to the BBS) [Alt]-[J] - Allows the sysop to shell to DOS, if enough memory is available. Simply type EXIT to return to the door again. =============================================================================== OpenDoors 5.00 Manual End of Page 32 [Alt]-[H] - Hang up on the user. When the sysop does this, OpenDoors will optionally call a function you have indicated in the OpenDoors control structure, to allow you to close files, etc. OpenDoors will then exit with the appropriate errorlevel: 0 - A critical error has occurred 1 - Carrier lost, user off-line 2 - Sysop terminated call, user off-line 3 - User time used up, user STILL ON-LINE 4 - Keyboard inactivity timeout, user off-line 5 - Sysop has chosen to return the user to the BBS 6 - Door has exited normally These errorlevel will allow sysops using your door to optionally log the user back on-line, place the BBS in "wait for call" mode, or whatever they wish, depending on how the door exited. These default errorlevels may be redefined using the od_control.od_errorlevel[] variable. [Alt]-[L] - This key locks the user out of the BBS. It first hangs up on the user, and then sets their security level to 0, to prevent them from ever logging on again. This feature may require use of the EXITINFO.BBS file, depending on what system the door is running under. [Alt]-[K] - The "User Keyboard-Off" key allows the sysop to temporarily prevent the user from typing anything on their keyboard. This has no effect on the local keyboard, but causes OpenDoors to ignore any keystrokes from remote. [Alt]-[N] - The "Sysop Next" key, this function reserves the system for use by the sysop after the user logs off, if the door is running under an Apex or RA 1.00 or later system. [Alt]-[D] - "Drop to BBS" key. This function allows the sysop to exit the door and return the user to the BBS, without hanging up. Now, let us take a closer look at the actual source code for the EZVote door. If you have not already printed out a copy of this manual, and possibly the EX_VOTE?.C files as well, it would probably be a good idea to do so now. EX_VOTE1.C Demonstrates the basic elements of any door program. This file contains the code to handle display of main menu, responding to the user's choice from the main menu, and common =============================================================================== OpenDoors 5.00 Manual End of Page 33 commands such as returning to the BBS and paging the system operator. This file also demonstrates basics of displaying text and retrieving input from user. Notice that near the top of the program, along with all the standard header files, the OPENDOOR.H file is included. This file must be included in all programs written under OpenDoors. If you are placing the OPENDOOR.H file in the same directory as the door you are compiling, simply include the line: #include "opendoor.h" in your program. The main() function of the EZVote program has a for(;;) loop that repeatedly displays the main menu, obtains a choice from the user and responds to the command, until the user chooses to exit the program. Before the main menu is displayed, the screen is cleared by calling od_clr_scr(). The od_clr_scr() function will clear both the local and remote screens, but only if the user has screen clearing enabled. Refer to page 57 for information on how to force the screen to be cleared, regardless of the user's screen clearing setting. The main menu is displayed using the od_printf() function, one of the most common OpenDoors functions you will use. Next, od_get_answer() is used to obtain a menu choice from the user from the specified set of keys. Next, a switch() statement is used to respond to the user's command appropriately. If the user presses the P key to page the system operator, od_page() is called. If the user chooses to return to the BBS, od_exit() is called to terminate OpenDoor's activities and return control to the BBS. The FALSE parameter passed to od_exit() indicates that OpenDoors should not disconnect (hangup) before exiting. If the user chooses to log off, EZVote first confirms this action with the user, and then calls od_exit() with the TRUE parameter. The numerical parameter passed to od_exit() sets the errorlevel that OpenDoors will exit with. EX_VOTE2.C Adds the user interface code to handle the main menu commands specific to EZVote, such as answering questions, viewing the results of questions, and adding new questions. For the most part the new code added to EX_VOTE2.C involves uses the same OpenDoors features that we have already looked at. However, if you look carefully you will notice some things that we haven't encountered before. In its ChooseQuestion() function, EZVote uses the OpenDoors function od_get_key(). This function is similar to the od_get_answer() function that we have already seen. However, unlike od_get_answer() which will wait until the user presses some key from the list of possibilities you provide, od_get_key() will allow the user to press any key. od_get_key() accepts a single parameter. If this parameter is TRUE, od_get_key() will wait for the user to press a key before returning. If this parameter is FALSE, od_get_key() will return immediately with a value of 0 if there are no keys waiting in =============================================================================== OpenDoors 5.00 Manual End of Page 34 the inbound buffer, and returning the next key if there are characters waiting. In a number of places, EX_VOTE2.C also uses the od_input_str() function. Unlike od_get_key() and od_get_answer() which return a single character, od_input_str() allows the user to input and edit a string of many characters. You will only receive the string entered by the user after they press the enter key. od_input_str() accepts four parameters: the string where the user's input should be stored, the maximum number of characters to input, the minimum character value to accept and the maximum character value to accept. Another new feature of OpenDoors that is used by EX_VOTE2.C is the OpenDoors control structure, od_control. This global structure is documented in chapter 5 of this manual. The OpenDoors control structure allows you to access a wide variety of information about the user who is currently online, the BBS system your program is running on, and also allows you to control various OpenDoors settings. For example, EX_VOTE2.C compares the current user name (od_control.od_user_name) with the name of the system operator (od_control.od_sysop_name) to determine whether it is the system operator who using the program. EX_VOTE3.C adds the code used by EZVote to store the questions and users in its data files. EZVote uses two data files, the first of which contains a record for every user, and the second of which contains a record for every question. EZVote accesses these data files in a controlled manner in order to permit the program to be running simultaneously on multiple lines on a multi-node BBS system. When EZVote needs to update a data file, it opens it for exclusive access, so that only one node can access the file at any given time. Since the data file could have been changed by another node since the time that EZVote last read the file, it always reads a record, makes changes to it and then re-writes the record while it has the file open for exclusive access. It then closes the file as soon as possible after opening the file, in order to permit other nodes to once again access the file. Because EZVote keeps track of which questions each user has voted on, along with the questions and results of voting on each question, its data file format is more complex than many door programs (although not as complex as others). EX_VOTE4.C adds the use of colour. One of the easiest ways to use different colors in an OpenDoors program is to use the OpenDoor's print color-setting extensions. You can change the color of text display at any point in an od_printf() format string using by enclosing the name of new display color in back quote characters (`, not '). For example: od_printf("`red`This is in red `green`This is green\n\r"); =============================================================================== OpenDoors 5.00 Manual End of Page 35 Would cause the words "This is in red" to be displayed in red, and the words "This is in green" to be displayed in green. EX_VOTE5.C adds the finishing touches to the EZVote program, taking advantage of a number of OpenDoors capabilities that you can optionally choose to include in your door programs. You will notice that there are a number of new lines at the beginning of the main() function, all of which change settings in the OpenDoors control structure. The line: od_control.od_config_file = INCLUDE_CONFIG_FILE; causes the OpenDoors configuration file system to be included in your program. Using this system, OpenDoors automatically reads a configuration file that can be used by the system operator to change various program settings. Refer to the included door.cfg file for an example OpenDoors configuration file. In addition to the configuration file settings automatically supported by the configuration file system, you can also add your own configuration file settings. To do this, you simply supply OpenDoors with a callback function that it will call whenever it encounters an unrecognized keyword in the configuration file. The line: od_control.od_config_function = CustomConfigFunction; Causes OpenDoors to call the function CustomConfigFunction() in ex_vote5.c for this purpose. You will notice that the CustomConfigFunction() receives two parameters - the first is the unrecognized keyword, and the second is any parameters that follow the keyword in the configuration file. EZVote checks for two special configuration file lines - one to set whether or not users can add questions, and one to set whether or not users can view the results of a question before voting on it. The next line in the main() function, od_control.od_mps = INCLUDE_MPS; causes the OpenDoors "Multiple Personality System" to be included in program. This allows the sysop to choose from a number of status line / sysop function key "personalities" that mimic a number of different BBS systems, using the Personality setting in the configuration file. The line: od_control.od_logfile = INCLUDE_LOGFILE; causes the OpenDoors log file system to be included in the program. The OpenDoors log file system automatically records the date and time of program startup, exit and other major actions =============================================================================== OpenDoors 5.00 Manual End of Page 36 in the specified file. EZVote also writes its own log file entries by calling the od_log_write() function. The last major functionally enhancement that is made in the EX_VOTE5.C file is the ability for the sysop to provide their own ASCII/ANSI/AVATAR/RIP files to be displayed in place of the normal main menu. EZVote uses the od_hotkey_menu() function to display an EZVOTE.ASC/.ANS/.AVT/.RIP file for the main menu, if such a file exists. If the file is not available, the normal EZVote menu is used instead. The od_hotkey_menu() function will automatically select the appropriate file (.ASC/.ANS/.AVT/.RIP) for the current display mode, and the user is able to make a menu choice at any time. If a menu choice is made before the menu is entirely displayed, the function will stop displaying the menu and return immediately. =============================================================================== OpenDoors 5.00 Manual End of Page 37 OTHER EXAMPLE DOORS INCLUDED WITH OPENDOORS ------------------------------------------------------------------------------ In addition to the EZVote door, which is discussed in detail in the previous section, a number of other example doors are included with OpenDoors. These doors help to demonstrate what is possible with OpenDoors. They can also serve as excellent tools to help you learn about OpenDoors as quickly as possible. In addition, you are free to include any portions of any of these example doors in your own door programs. Below is a summary of each of these example programs: ------------------------------------------------------------------------------- EX_HELLO.C This an example of a very simply door program that displays a short message and prompts for the user to press a key. After the user presses a key, the door exits and control is returned to the main BBS software. Despite the fact that it only consists of a few lines of code, EX_HELLO remains a fully functional door program. For information on compiling an OpenDoors door program, see the section that begins on page 25. ------------------------------------------------------------------------------- EX_CHAT.C This program is an example of a multi-window full-screen chat door written with OpenDoors. EX_CHAT demonstrates the ease of using sophisticated ANSI / AVATAR / RIP terminal features within OpenDoors programs. For instructions on how to compile this program, see the section that begins on page 25. This program create two windows on the screen, separated by a bar with user name / sysop name information. This program permits communication between the local sysop and remote user by displaying the text typed by the user in one window, and the text typed by the sysop in the other window. When either person's typing reaches the bottom of the window, the contents of the window is scrolled up to provide more room for typing. Words are also wrapped when either typist reaches the end of a line. The advantage of a split-screen chat program is that it permits both sysop and user to type at the same time without difficulty. The chat function automatically invokes OpenDoor's internal chat mode if ANSI, AVATAR or RIP modes are not available. The display colours, window sizes and locations, and distance to scroll a window's contents are configurable by setting the appropriate variables, below. When the Sysop invokes a DOS shell, a pop-up window is displayed to indicate to the user that the door program has been suspended. =============================================================================== OpenDoors 5.00 Manual End of Page 38 The chat feature of this program can also be easily integrated into other doors you write, and may be used to replace the existing OpenDoors line-oriented chat system. ------------------------------------------------------------------------------- EX_MUSIC.C This example door demonstrates how to play "ANSI" music and sound effects in an OpenDoors door. Included in this program is a function to send "ANSI" music to the remote system, and a function to text the remote system's ability to play "ANSI" music. You may use both of these functions in your own doors, if you wish to add music or sound effect capabilities. This program can be compiled by following the instructions that begin on page . 25 ------------------------------------------------------------------------------- EX_SKI.C This is a simple but addictive door game that is written using OpenDoors. In this action game, the player must control a skier through a downhill slalom course. The user may turn the skier left or right, and the game ends as soon as the player skis outside the marked course. The game begins at an easy level, but quickly becomes more and more difficult as the course to be navigated becomes more and more narrow. The game maintains a list of players with high scores, and this list may be viewed from the main menu. ------------------------------------------------------------------------------- EX_VOTE?.C The EX_VOTE?.C files contain the source code for the EZVote example door, as is described beginning on page 38. The EZVote example door allows users to vote on up to 200 different "polls", view the results of voting on each question, and optionally add their own questions for other users to answer. =============================================================================== OpenDoors 5.00 Manual End of Page 39 ------------------------------------------------------------------------------- CHAPTER 4 - THE OPENDOORS API FUNCTIONS ------------------------------------------------------------------------------- OVERVIEW ------------------------------------------------------------------------------ All of the door-related activities of an OpenDoors door program are coordinated through one of two facilities - the OpenDoors API functions, and the OpenDoors door control structure. In general, the API functions are used to actually accomplish a task, such as displaying something to the user, or retrieving input from the user. The OpenDoors control structure, on the other hand, is used to alter OpenDoors settings or retrieve specific information. Any program written with OpenDoors makes use of the OpenDoors API functions for all of its door-related input and output. In addition to the common input and output tasks, the OpenDoors API functions provide access to many special capabilities, such as displaying ASCII/ANSI/AVATAR/RIP files, providing pop-up windows and menus, and much more. Much of the information about the user who is online, information about the system your door is running on, and settings which customize OpenDoor's behavior are controlled through the OpenDoors control structure. The control structure is described in the section beginning on page 145. This chapter is divided into the following sections: i.) TABLE OF MOST COMMONLY USED FUNCTIONS (Page 41) ii.) TABLE OF ALL OPENDOORS FUNCTIONS (Page 42) iii.) DETAILED INFORMATION ON EACH FUNCTION (Pages 46 - 144) The two tables list the names of the OpenDoors functions, along with a brief description of the task performed by each function, and the page number on which the detailed description of that function can be found. The first table lists only the most commonly used OpenDoors functions, to allow you to quickly find the function you are most likely looking for. The second table lists all of the OpenDoors functions, grouped according to general categories of functionality. The section containing detailed information lists all of the functions in alphabetical order, with the information about each function beginning on a new page. This section includes a brief description of each function's purpose, a detailed description of how to use the function, the function call format, a list of related functions, and in many cases example source code showing you a typical use of the function. =============================================================================== OpenDoors 5.00 Manual End of Page 40 TABLE OF MOST COMMONLY USED FUNCTIONS ------------------------------------------------------------------------------ od_printf() Displays text, with the ability to change display colour. (page 105) od_clr_scr() Clears the screen. (Page 57) od_input_str() Inputs a string of one or more characters from the user. (Page 94) od_get_answer() Inputs a single key from a list of possible choices ignoring upper/lower case. (Page 83) od_get_key() Inputs any single key from the user. (Page 84) od_set_cursor() Positions the cursor in ANSI/AVATAR/RIP modes. (Page 131) od_hotkey_menu() Displays an ASCII/ANSI/AVATAR/RIP file, with the option of watching for a keypress from the user. (Page 89) od_popup_menu() Displays a popup menu in ANSI/AVATAR/RIP modes. (Page 102) od_window_create() Creates a popup window in ANSI/AVATAR/RIP modes. (Page 142) od_window_remove() Removes a popup window in, restoring screen contents "underneath" window. (Page 144) =============================================================================== OpenDoors 5.00 Manual End of Page 41 TABLE OF ALL FUNCTIONS ------------------------------------------------------------------------------- OUTPUT TEXT DISPLAY FUNCTIONS FUNCTIONS ---------------------- od_disp_str() Displays a normal, NULL-terminated string. (page 64) od_disp() Sends the specified number of characters to the modem, with or without local echo. (page 60) od_printf() Performs formatted output, as the printf() function does. Also allows imbedded codes to change display colour. (page 105) od_putch() Displays a single character. (page 110) od_disp_emu() Displays a string, interpreting imbedded ANSI/AVATAR terminal emulation codes. (page 62) od_repeat() Displays the same character any number of times, using AVATAR optimization, if possible. (page 114) COLOUR AND CURSOR CONTROL ------------------------- od_set_colour() Sets current colour to specified foreground and background settings. (page 128) od_set_attrib() Sets current colour to specified IBM-PC display attribute. (page 125) od_set_cursor() Sets the position of the cursor, if ANSI/AVATAR/RIP mode is enabled. (page 131) SCREEN MANIPULATION ------------------- od_clr_scr() Clears the screen, if user has screen clearing enabled. (page 57) od_save_screen() Stores the current contents of the screen, to be later redisplayed using od_restore_screen(). Works in all display modes. (page 117) =============================================================================== OpenDoors 5.00 Manual End of Page 42 od_restore_screen() Restores the contents of the screen, as previously stored using od_save_screen(). Works in all display modes. (page 116) BLOCK MANIPULATION ------------------ od_clr_line() Clears the remainder of current line. (page 55) od_gettext() Stores any area of the screen, to later be displayed by od_puttext(). Requires ANSI/AVATAR/RIP graphics mode. (page 88) od_puttext() Displays text with colour information, as previously stored using od_gettext(). Requires ANSI/AVATAR/RIP graphics mode. (page 112) od_scroll() Scrolls a portion of the screen in ANSI/AVATAR/RIP graphics modes. (page 119) POPUP WINDOWS AND MENUS ----------------------- od_draw_box() Draws a box on the screen in ANSI/AVATAR/RIP graphics mode. (page 66) od_window_create() Displays a popup window, storing the screen contents "under" the window. Requires ANSI/AVATAR/RIP graphics mode. (page 142) od_window_remove() Removes a popup window displayed with od_window_create(), restoring the original screen contents "under" the window. Requires ANSI/AVATAR/RIP graphics mode. (page 144) od_popup_menu() Displays a menu in a popup window, allowing the user to choose menu items either by pressing a "hot" key, or moving a highlighted selection bar. After menu selection, the menu may be removed, restoring the original screen contents "under" the window. Requires ANSI/AVATAR/RIP graphics mode. (page 102) FILE DISPLAY FUNCTIONS ---------------------- =============================================================================== OpenDoors 5.00 Manual End of Page 43 od_send_file() Displays an ASCII/ANSI/AVATAR/RIP file (for instance, an .ANS file created by a program such as "TheDraw" (page 121) od_hotkey_menu() Displays an ASCII/ANSI/AVATAR/RIP menu file, with hotkeys active. (page 89) od_list_files() Lists the files available for download in an area, using a FILES.BBS file. (page 98) ------------------------------------------------------------------------------- INPUT od_get_answer() Inputs a single key from the keyboard, FUNCTIONS allowing only particular responses. (page 83) od_get_key() Inputs a single key from the keyboard, optionally waiting if a key is not available. (page 84) od_input_str() Inputs a string of specified length, from the keyboard. (page 94) od_edit_str() Formatted string editing function, requiring ANSI/AVATAR/RIP graphics. (page 70) od_clear_keybuffer() Removes any waiting keys from the keyboard input queue. (page 53) ------------------------------------------------------------------------------- COMMON od_page() Allows the user to page the sysop. DOOR (page 101) ACTIVITY FUNCTIONS od_spawn() OpenDoors "quick" spawn function. Executes an external program (eg. file compressor, external protocol, etc.) on a separate screen, restoring the OpenDoors screen afterwards. (page 138) od_spawnvpe() OpenDoors full-featured spawn function. Executes an external program on a separate screen, searching the path for the program, allowing you to specify an environment to pass to the child process, and returning the errorlevel returned by the child process. (page 140) od_log_write() Adds an entry to the end of the log file. (page 100) =============================================================================== OpenDoors 5.00 Manual End of Page 44 ------------------------------------------------------------------------------- SPECIAL od_init() Begins door operation by setting up CONTROL the OpenDoors control structure, FUNCTIONS setting up the local screen, initializing the serial port (if applicable), and reading the door information file. (page 91) od_colour_config() Transfers a colour configuration line to a colour attribute value. (page 59) od_add_personality() Adds a custom status line/control key personality to OpenDoors. (page 46) od_set_statusline() Temporarily alters the setting of the current OpenDoors status line. (page 136) od_autodetect() Automatically determines the remote terminal software's graphical capabilities. (page 48) od_kernel() The central OpenDoors control function, which should be executed every few seconds. (page 96) od_exit() Ends door operations, closing the serial port driver, re-writing the door information file, and optionally returning control to the BBS. (page 81) od_carrier() Allows detection of carrier signal in programs that have disabled OpenDoors internal checking. (page 51) od_set_dtr() Controls the DTR signal to the modem. Can be used to manually disconnect a remote user, in order to perform activities such as call back verification. (page 133) od_chat() Forces OpenDoors to enter chat mode, even if sysop did not press the "chat" key. (page 50) =============================================================================== OpenDoors 5.00 Manual End of Page 45 OD_ADD_PERSONALITY() ------------------------------------------------------------------------------- PURPOSE Installs a custom status line / sysop function key personality into OpenDoors. FORMAT int od_add_personality(char *name, char output_top, char output_bottom, void (*function)(unsigned char)); RETURNS TRUE on success FALSE on failure DESCRIPTION If used, this function should be called before any other OpenDoors API functions. Installs a new personality into OpenDoors. The first parameter specifies the string that will be used to identify the personality. This is the string that the user will be able to supply in the configuration file to select this personality, and is also the string that can be passed to od_set_personality() to manually switch to this personality. The second and third parameters specify the 1-based to and bottom line numbers of the output window to be used with this personality. For instance, a top value of 1 and bottom value of 23 would cause all door output to be displayed on the first 23 lines of the screen, leaving the bottom two lines for use by the personality's status line. The last parameter is a pointer to the personality function, which OpenDoors will call to perform various operations with that involve the personality. OpenDoors will pass one of the following values to the personality function, indicating the operation that the function should perform: PEROP_INITIALIZE Initialize the personality, installing any custom function keys. PEROP_DEINITIALIZE Deinitialize the personality, returning any changed settings to their original values. PEROP_CUSTOMKEY Indicates that a custom function key has been pressed. PEROP_DISPLAYx Where x is a number from 1 to 10. Indicates that the specified status line should be drawn from scratch. PEROP_UPDATEx Where x is a number from 1 to 10. Indicates that the specified status line should be updated to reflect any changes. For more information on personalities and the OpenDoors Multiple Personality System, see the section which begins on page 223. =============================================================================== OpenDoors 5.00 Manual End of Page 46 SEE ALSO od_set_personality(), od_set_statusline() =============================================================================== OpenDoors 5.00 Manual End of Page 47 OD_AUTODETECT() ------------------------------------------------------------------------------- PURPOSE Attempts to automatically determine the terminal capabilities of the remote system. FORMAT void od_autodetect(int flags); RETURNS N/A DESCRIPTION This function can be used to determine whether or not the remote terminal supports ANSI and/or RIP (Remote Imaging Protocol) graphics modes. This information is usually supplied to the door by the BBS software, through the door information file. For this reason, most door programs do not need to make used of this function. However, if your door will be running under any BBS software that does not report the ANSI or RIP capabilities of the remote system, you may wish to use this function. od_autodetect() will set either of the following OpenDoors control structure variables to TRUE if the corresponding graphics mode is detected: od_control.user_ansi - TRUE if ANSI mode is available od_control.user_rip - TRUE if RIP mode is available However, if either of these variables have previously been set to TRUE (either explicitly by your program, or due to the corresponding modes being enabled in the door information file), and od_autodetect() does not detect the corresponding graphics mode, they will not be set to FALSE. Not all terminal software that supports ANSI or RIP graphics mode will necessarily have the ability to report their graphics mode capabilities to the door. For this reason, failure to detect either of these modes does not necessarily indicate that they are not available. However, if these modes are detected by od_autodetect(), it is safe to assume that the remote system does support the detected mode. The flags parameter is reserved for future use, and should always be set to DETECT_NORMAL. This function does not support auto-detection of AVATAR mode, because there is no standard means of determining whether a remote system supports AVATAR graphics. =============================================================================== OpenDoors 5.00 Manual End of Page 48 EXAMPLE Below is an example of using od_autodetect() in determining the remote terminal's graphics capabilities. Since not all terminal software supports auto-detection, this example will also prompt the user to determine their software's capabilities if od_autodetect() fails to detect ANSI mode. This code assumes that if the terminal software supports the autodetection of ANSI mode, that it will also support the autodetection of RIP mode. OpenDoors assumes that ANSI mode is always available in conjunction with RIP mode. /* Call the automatic terminal detection function */ od_autodetect(); /* If ANSI mode was not detected, ask the user about if(!od_control.user_ansi) { /* Prompt the user for ANSI capabilities */ od_clr_scr(); od_printf("Does your system support ANSI graphics?"); od_printf(" (Y/N)"); /* If the user chooses [Y]es */ if(od_get_answer("YN") == 'Y') { /* Turn on ANSI mode */ od_control.user_ansi = TRUE; /* Since ANSI mode is present, RIP mode may also */ /* be available. Prompt the user for RIP. */ od_printf("\r\n\n"); od_printf("Does your system support RIP graphics?"); od_printf(" (Y/N)"); /* If the user chooses [Y]es */ if(od_get_answer("YN") == 'Y') /* Turn on RIP mode */ od_control.user_rip = TRUE; /* Since ANSI mode is present, AVATAR mode may */ /* also be available. Prompt the user for AVATAR. */ od_printf("\r\n\n"); od_printf("Does your system support AVATAR "); od_printf("graphics? (Y/N)"); /* If the user chooses [Y]es */ if(od_get_answer("YN") == 'Y') /* Turn on AVATAR mode */ od_control.user_avatar = TRUE; } od_printf("\r\n\n"); } =============================================================================== OpenDoors 5.00 Manual End of Page 49 OD_CHAT() ------------------------------------------------------------------------------- PURPOSE Manually invokes sysop chat mode. FORMAT void od_chat(void); RETURNS N/A DESCRIPTION Normally, the OpenDoors sysop chat mode will only be invoked when the sysop explicitly requests it using the sysop chat key. However, there may be some cases where you wish to manually invoke the sysop chat mode. One example is when you are replacing the OpenDoors built-in chat mode with your own, but still wish to use the OpenDoors chat mode under some circumstances. For instance, you may wish to use your own split- screen chat routine if ANSI, AVATAR or RIP graphics mode is available, and use the OpenDoors line-oriented chat mode if only ASCII mode is available. SEE ALSO od_page() EXAMPLE For an example of using the od_chat() function, see the ex_chat.c example door, which is described on page 38. =============================================================================== OpenDoors 5.00 Manual End of Page 50 OD_CARRIER() ------------------------------------------------------------------------------- PURPOSE To determine the status of the carrier detect signal, in programs where OpenDoors' internal carrier detection has been disabled. FORMAT int od_carrier(void); RETURNS TRUE if a carrier is present, or FALSE if no carrier is present, or in local mode. DESCRIPTION Usually, you will not have any use for the od_carrier() function, as OpenDoors automatically monitor's the carrier detect signal, and will correctly recover if the carrier detect signal is lost while the door is operating in remote mode. However, in some programs, you may wish to disable OpenDoors' internal carrier detection routines, using the od_control.od_disable variable. Two such cases in which you might want to do this, are a call-back verification door, which disconnects the user and attempts to call them back, or in a terminal program, which is in fact not a door at all (and as such you would not want to have OpenDoors exit when the carrier detect signal is lost). In cases like these, you will then be able to use the od_carrier() function in order to determine the state of the carrier detect signal. This function will return a Boolean value (for more information on Boolean values, see the Glossary which begins on page 246), of either TRUE or FALSE. If a carrier detect signal is present when the function is called, it will return TRUE, and if no carrier detect signal is detected, it will return FALSE. Since there is no remote connection, and thus no carrier when OpenDoors is operating in local mode, this function will always return a value of FALSE in local mode. SEE ALSO od_set_dtr() EXAMPLE As an example of the use of this function, let us consider a call back verification door, which hangs up on the user, and then calls the user back at their entered phone number, in order to verify the correctness of that number. This program would probably contain a function that is responsible for disconnecting the user, waiting for the connection to be broken, and then phoning the user. At some point in this function, =============================================================================== OpenDoors 5.00 Manual End of Page 51 likely just prior to the point where the function hangs up on the user, you would disable OpenDoors' internal carrier detection, using the line: od_control.od_disable |= DIS_CARRIERDETECT; You would then want to have a piece of code which would simply wait up to a given amount of time for the carrier signal to drop. If this occurs, you would continue to place the call, and if it does not occur, you would probably try your hangup procedure one or two more times. In this example, the function will return with a value of FALSE if the carrier signal does not drop, and will return a value of TRUE if it does. char hangup(void) { register long timer; char to_return = FALSE; od_set_dtr(FALSE); /* Hangup modem */ /* Wait up to 30secs (546 ticks) */ timer=(*(long far *)0x46cL)+546L; while(timer>=*(long far *)) { /* If carrier has been lost, return with success */ if(!od_carrier()) { to_return = TRUE; break; } } od_set_dtr(TRUE); /* Re-enable DTR signal */ return(to_return); } =============================================================================== OpenDoors 5.00 Manual End of Page 52 OD_CLEAR_KEYBUFFER() ------------------------------------------------------------------------------- PURPOSE Function to clear the input keyboard buffer FORMAT void od_clear_keybuffer(void); RETURNS N/A DESCRIPTION OpenDoors maintains its own keyboard input buffer, in order to permit the user to "type ahead" - to send input to the door prior to the time when it is ready to process those key presses. For example, the user could begin to type a command while a menu is still being displayed, and when your door reaches the point of inputting the menu command, the characters already typed by the user will already be waiting for the OpenDoors input functions. Note that the keyboard input buffer will include both the keys hit by the user on-line, and the non-function keys (ie, Alt-C will not appear in the OpenDoors keyboard buffer), hit by the sysop. This allows both the user on-line and the sysop to control the door at any time. If the sysop wishes to temporarily prevent the user from having any control over the door, the sysop may use the Alt-K (user-keyboard off) key. The key strokes placed in the OpenDoors type-ahead buffer will be retrieved by the od_get_key() and od_input_str() functions. The keyboard buffer can contain a maximum of 64 user keystrokes in this version of OpenDoors, after which any additional keystrokes will simply be discarded by OpenDoors. There are times, however, when you will want to erase any keys that have been hit by the user, to prevent them from typing ahead. For example, if your door has been busy doing some processing for a few moments, they user may have been pressing keys on their keyboard - perhaps in the hope that doing so will speed things up. These keys will be waiting in the type-ahead buffer, and if one of the keys the user entered was a valid response to the next prompt in your door, the user may find that they have accidentally made a choice they did not wish to. A well designed door will simply erase the contents of the type- ahead buffer after any long period of internal processing, etc. Keep in mind that too much use of the od_clear_keybuffer() function can be just as undesirable as not using it all, as there are times when the presence of the keyboard buffer can prove to be very useful for the user of a door. =============================================================================== OpenDoors 5.00 Manual End of Page 53 To erase the contents of the type-ahead buffer, you simply call the od_clear_keybuffer() function. This function takes no parameters, and does not return any value. SEE ALSO od_get_key(), od_input_str(), od_edit_str() EXAMPLE For one example of the use of the od_clear_keybuffer() function, see the example door program EZVote, which is described beginning on page 38. Below is another example of using this function. In this case, we present a simple function, wait_for_return(), which simply pauses for the user to press their [Enter]/[Return] key. The function begins by displaying a prompt asking for the [Enter] or [Return] key to be pressed. The function then clears the keyboard input buffer, and waits until the user presses the carriage return key, using the od_get_key() function. Note also that this function will only continue if the user has pressed the correct key. This is a good idea in all door programs, as it allows your door to distinguish between a character pressed by the user, and a "line noise" character. void wait_for_return(void) { /* Display prompt */ od_disp_str("Please Press [Enter] to continue...\n\r"); od_clear_keybuffer(); /* Clear keyboard buffer */ while(od_get_key(TRUE)!=13); /* Wait for Enter key */ } =============================================================================== OpenDoors 5.00 Manual End of Page 54 OD_CLR_LINE() ------------------------------------------------------------------------------- PURPOSE Clears the rest of the current display line FORMAT void od_clr_line(void); RETURNS N/A DESCRIPTION This function clears the line that the cursor is on, from the cursor position to the end of the line. After the rest of the line is cleared, the cursor is automatically returned to the position it was at prior to issuing the command. Hence, if the display line the cursor was located on looked as follows, with the underscore (_) character representing the cursor position: This is a_line of text! With the cursor between the words "a" and "line", after the od_clr_line command is issued, the line would appear as follows: This is a_ With the cursor directly following the word "a". Note that this function places a space character at the cursor location, and every location up to the end of the line. When the door is running in plain ASCII mode, this command will simply clear the rest of the line by manually sending a series of space and backspace characters. When ANSI, AVATAR or RIP modes are active, the corresponding ANSI/AVATAR control sequence will be sent in order to accomplish the line clear. Since the graphics mode sequences are much shorter than the sequence that would be required to clear the line manually, the use of this function will cause your door's graphics to display much more quickly when ANSI, AVATAR or RIP modes are active. Also note that in ANSI, AVATAR or RIP graphics modes, the line will be cleared with the currently selected colour attribute. Thus, if you wanted to place a blue background on a particular line, you would use the od_set_colour() (or od_set_attrib()) function, then use the od_set_cursor() function to locate the cursor at the beginning of the desired line, followed by the od_clr_line() function. Just such a procedure is demonstrated in the example, below. SEE ALSO od_clr_scr(), od_set_cursor() =============================================================================== OpenDoors 5.00 Manual End of Page 55 EXAMPLE Below, is an example of a function that clears an entire line with a specified colour. Since this function performs operations that require ANSI, AVATAR or RIP graphics mode, it should only be used in a case where these modes are known to be available. For example, this function would be useful in a full-screen editor or viewer, or when performing ANSI animations. The function accepts three parameters: the line to be cleared (where 1 is the first line, 2 the second, and so on), the foreground colour of this line, and the background colour of this line. This function differs from the od_clr_line() function itself in several important manners. First of all, this function clears the entire line, whereas the od_clr_line() function can be used to clear only the remaining characters of the line, after any particular location. Also, as mentioned before, this function selects a colour to clear the line to, and moves the cursor to the line which is to be cleared - neither of which is done by the od_clr_line() function. void clear_line(char line_number,char foreground,char background) { od_set_cursor(line_number,1); /* move to correct line */ od_set_colour(foreground,background); /* set colour */ od_clr_line(); /* clear entire line */ } =============================================================================== OpenDoors 5.00 Manual End of Page 56 OD_CLR_SCR() ------------------------------------------------------------------------------ PURPOSE The OpenDoors clear screen function FORMAT void od_clr_scr(void); RETURNS N/A DESCRIPTION The od_clr_scr() function can be used to clear the door screen. (ie, the user's screen and local screen with the exception of the status line are cleared.) Also, if your door is running under a system, such as RemoteAccess, Apex or QuickBBS, which produce an EXITINFO.BBS file, this function will detect the user's screen clearing setting, and only clear the screen if screen clearing is turned on. If an EXITINFO.BBS file is not available, this function will always clear the screen (as OpenDoors will not be able to determine whether or not the user has screen clearing enabled). If your door will be running under BBS systems that do not pass the user's screen clearing setting to the door, you may wish to determine yourself whether or not the user's system supports screen clearing codes, during the first time the user uses the door. You will then be able to store this setting in a data file. The example below demonstrates how to detect whether or not the user's system supports screen clearing. You should note that the ability for the user's terminal to support screen clearing codes is independent of the user's ANSI / AVATAR / RIP graphics mode settings. For more information on the user's screen clearing setting, please refer to the user_attrib variable in the OpenDoors Control Structure chapter of this manual. If you wish to force a screen clear, regardless of the user's screen clearing setting, simply use the function call: od_disp_emu("\xc", TRUE); SEE ALSO od_clr_line() EXAMPLE Below is an example of a function which determines whether or not the user's system supports screen clearing. This function will return a value of TRUE if screen clearing is supported, and =============================================================================== OpenDoors 5.00 Manual End of Page 57 will return a value of FALSE if screen clearing is not supported: int user_supports_screen_clearing(void) { char answer; /* display instructions to user */ od_disp_str("In order for this door to function\n\r"); od_disp_str("correctly, we must know whether or not\n\r"); od_disp_str("your system supports screen clearing.\n\r"); od_disp_str("In a moment, we will attempt to clear\n\r"); od_disp_str("your screen in order to test your system's\n\r"); od_disp_str("capabilities.\n\r\n\r"); od_disp_str("Please press [Enter]/[Return] when you\n\r"); od_disp_str("are ready to perform this test.\n\r"); while(od_get_key(TRUE)!=13); /* wait for [Return] key */ od_clr_scr(); /* attempt to clear screen */ /* ask user if their screen cleared */ od_disp_str("Did your screen just clear? (Y/N)\n\r"); for(;;) /* loop until user chooses [Y]es or [N]o */ { answer=od_get_key(TRUE); /* Get user's answer */ if(answer=='y' || answer=='Y') return(TRUE); if(answer=='n' || answer=='N') return(FALSE); } } =============================================================================== OpenDoors 5.00 Manual End of Page 58 OD_COLOUR_CONFIG() ------------------------------------------------------------------------------- PURPOSE Parses a colour configuration line from the configuration file, generating a colour attribute value. FORMAT unsigned char od_colour_config(char *config_line); RETURNS Colour attribute value DESCRIPTION This function will be of use if you are using the configuration file system of OpenDoors, and wish to allow the sysop to specify text colours to be used in your door. While OpenDoors automatically recognizes colour configuration settings for things such as sysop chat mode and FILES.BBS listings, you may wish to add additional colour configuration options. In this case, you could call the od_colour_config() function from your custom line function. For more information on the custom line function, see the section on the OpenDoors configuration file system, which begins on page 215. To use this function, simply pass the configuration file line you wish to have parsed to the function in it's single parameter. The function will then return a colour attribute value in the same format that is used but the od_set_attrib() function. Colours are specified using a string of the format: {Flashing} {Bright} [foregoround] on [background] Where "Flashing" is an optional keyword indicating that the text should be flashing. "Bright" is an optional keyword indicating that the foreground colour should be bright. Foreground is the name of a foreground colour, and background is the name of a background colour. Case (upper or lower) is not significant. The colour keywords are language configurable, using the array od_control.od_colour_names. EXAMPLE See the example accompanying in the section on the OpenDoors configuration file system, which begins on page 215. =============================================================================== OpenDoors 5.00 Manual End of Page 59 OD_DISP() ------------------------------------------------------------------------------ PURPOSE Sends a buffer of text with optional local echo FORMAT void od_disp(char *buffer, int size, char local_echo); RETURNS N/A DESCRIPTION This function allows you to send a buffer of text of any specified length, with the option of enabling or disabling local echo. You will probably have little use for this function - instead you will most likely display strings using either the od_disp_str() or od_printf() functions, depending on whether or not you wish to use printf()'s formatting options. For a breakdown of the uses of the various OpenDoors display functions, see the description of the od_disp_str() function, on page 64. There are two cases when this function will come in useful: 1.) If you wish to display a buffer of characters of known length, which may contain null (ASCII 0) characters. Since this character is used by the C language to indicate the end of a string, the other two string display functions (od_disp_str() and od_printf()) will not send this character to the remote system. 2.) If you wish to send text to the remote system without having it displayed on the local screen, or if you wish to send strings to the modem when it is in command mode, without having these characters displayed on the local screen. The od_disp() function is called with three parameters. The first parameter, *buffer, is a pointer to a buffer of characters you wish to have displayed. The second parameter, size, is simply the number of characters in the buffer to be displayed. If the third parameter, local_echo, is set to TRUE, then all characters sent to the modem will also be displayed on the local screen. If the third parameter is set to FALSE, then the buffer will be sent to the modem without being echoed to the sysop's screen. SEE ALSO od_disp_str(), od_printf(), od_putch(), od_repeat(), od_disp_emu() =============================================================================== OpenDoors 5.00 Manual End of Page 60 EXAMPLES The following are a few examples of the use of the od_disp() function: In order to display a single character, contained in the variable "character", without echo to the local screen: od_disp(&character,1,FALSE); In order to send a command to the modem (only if you know that the modem is in command mode), with the command contained in the null-terminated string "string": od_disp(string,strlen(string),FALSE); In order to send exactly 5 characters from the buffer "buffer", WITH echo to the local screen: od_disp(buffer,5,TRUE); =============================================================================== OpenDoors 5.00 Manual End of Page 61 OD_DISP_EMU() ------------------------------------------------------------------------------- PURPOSE Displays a string with ANSI/AVATAR terminal emulation FORMAT void od_disp_emu(char *string, char remote_echo); RETURNS N/A DESCRIPTION The od_disp_emu() function allows you to display your own ANSI / AVATAR graphics sequences. This function passes the characters you wish to display to the OpenDoors terminal emulator, which is fully documented in the description of the od_send_file() function, on page 121. As a result, this function can be used to send these control sequences to the user's terminal, and also have them displayed on the local screen as they will appear to the user. The string passed to od_disp_emu() contains any stream of text to display, and may include both normal text and terminal emulation control sequences. The OpenDoors terminal emulator stores its current state between calls to od_disp_emu(), and so control sequences my be broken between calls to od_disp_emu. In other words, the call: od_disp_emu("\x1b[1C", TRUE); is equivalent to: od_disp_emu("\x1b[", TRUE); od_disp_emu("1C", TRUE); If the remote_echo parameter is set to TRUE, the string passed to od_disp_emu() will be sent to the remote terminal in addition to being displayed locally. If this parameter is set to FALSE, the string will only be displayed locally. Note that if you wish to display an entire file containing ANSI/AVATAR/RIP graphics sequences (perhaps as your program's menu or title screen), you can use the od_send_file() function. SEE ALSO od_send_file(), od_disp(), od_disp_str() od_printf(), od_putch(), od_repeat(). For a breakdown of the uses of the various OpenDoors display functions, see the od_disp_str() function, on page 64. =============================================================================== OpenDoors 5.00 Manual End of Page 62 EXAMPLE For an example of the use of the od_disp_emu() function, see the SpaceRight() and MoveLeft() functions included in the example program ex_ski.c. These functions use the ANSI move cursor left and move cursor right functions to move the cursor relative to the current position, without knowing what the current cursor position is. =============================================================================== OpenDoors 5.00 Manual End of Page 63 OD_DISP_STR() ------------------------------------------------------------------------------- PURPOSE Displays a string to the screen (remote and local) FORMAT void od_disp_str(char *string); RETURNS N/A DESCRIPTION The two functions most often used for displaying strings within a door are the od_disp_str() and od_printf() functions. The od_printf() function allows for formatted output, whereas the od_disp_str function simply displays the actual contents of the string passed to it. If you wish to display a single character, use the od_putch() function. If you wish to send a string or buffer to the modem without local echo, use the od_disp() function. If you wish to send a sequence of the same character to the modem, the od_repeat() function will use graphics control codes, if available to display the sequence much faster than simply sending the same character in repetition. Also, if you wish to send ANSI, AVATAR or RIP graphics control codes, and have them emulated on the local screen, use the od_disp_emu() function. The od_disp_str() function displays the contents of the null- terminated string pointed to by *string. Display is sent to both the local screen and modem (presuming the door is not running in local mode). An important thing to keep in mind when using the od_disp_str() function, is that you should use "/n/r" instead of simply "/n" for a new line. This is due to the fact that terminal programs usually require a carriage-return line-feed sequence (/n/r), instead of just a line-feed (/n). For example, instead of using: od_disp_str("Hello world!\n"); You should use: od_disp_str("Hello world!\n\r"); To change the cursor colour or location of output with the od_disp_str() function, refer to the od_set_cursor() and the od_set_attrib() functions. SEE ALSO od_disp(), od_printf(), od_putch(), od_repeat(), od_disp_emu() =============================================================================== OpenDoors 5.00 Manual End of Page 64 EXAMPLES Below are a few examples of various uses of the od_disp_str() function: Displaying three string constants on separate lines: od_disp_str("This is an example\n\r"); od_disp_str("of the OpenDoors\n\r"); od_disp_str("od_disp_str() function\n\r"); Displaying three string constants on the same line: od_disp_str("Another "); od_disp_str("od_disp_str() "); od_disp_str("example\n\r"); Displaying a string variable: char string[80]; strcpy(string,"This is a string!\n\r"); od_disp_str(string); =============================================================================== OpenDoors 5.00 Manual End of Page 65 OD_DRAW_BOX() ------------------------------------------------------------------------------- PURPOSE Draws a window on the screen in ANSI, AVATAR or RIP graphics modes. FORMAT int od_draw_box(char left, char top, char right, char bottom); RETURNS TRUE on success, FALSE on failure DESCRIPTION This function is for use in ANSI, AVATAR or RIP graphics modes. This function will draw a window in the current display attribute, at the specified location on the screen. The boarder of the window is made up of the characters specified in the od_control. od_box_chars[] array. If AVATAR graphics mode is available, this function uses AVATAR control codes to display the window in less than 1/10 the length of time required to display the window in ANSI mode. The first two parameters of this function, "left" and "top", specify the coordinates of the top, left-hand corner of the window to be draw. The third and fourth parameters, "right" and "bottom", specify the coordinates of the bottom, left-hand corner of the window. Like the values passed to the od_set_cursor() function, these coordinates are relative to the upper left-hand corner of the screen, with the position (1,1) being this corner. As mentioned above, this function will display the window in the current text colour. Thus, before calling this function, you should use either the od_set_colour() or the od_set_attrib() function to specify the colour in which you would like to have the window displayed. Normally, the boarder of the window will be displayed using the IBM extended ASCII characters which produce a single line boarder. However, you may wish to have the boarder displayed using different characters. In this case, the characters used to display the boarder can be specified by the od_control. od_box_chars variable, described in the OpenDoors control structure section of this manual. SEE ALSO od_set_colour(), od_set_attrib(), od_clr_scr(), od_edit_str(), od_set_cursor() =============================================================================== OpenDoors 5.00 Manual End of Page 66 EXAMPLE As an example of the use of the od_draw_box() function in conjunction with the od_edit_str() function, we show a portion of a program which displays a window, and allows the user to input the name of a file they would like to upload, a description of the file, and whether they want it to be a private upload. The user is able to move among fields using the tab key, and select a "continue" button when they are finished. The function returns TRUE if the user selects continue, and FALSE if the user presses [ESCape]. // Main "dialog box" function int get_information(char *filename, char *description, char *private) { char current_field=1; // Currently selected field int choice; // User's choice od_set_colour(L_WHITE,D_BLUE); // Display window od_draw_box(10,5,70,13); od_set_cursor(5,25); // Display window title od_set_colour(L_GREEN,D_BLUE); od_disp_str(" ENTER FILENAME INFORMATION "); od_set_colour(L_CYAN,D_BLUE); // Display fields and titles od_set_cursor(6,15); od_disp_str("FILENAME : "); od_repeat(176,13); od_set_cursor(7,12); od_disp_str("DESCRIPTION : "); od_repeat(176,43); od_set_cursor(8,16); od_disp_str("PRIVATE : "); od_repeat(176,2); draw_button(); filename[0]='\0'; // Blank out contents of input variables description[0]='\0'; private[0]='\0'; for(;;) // Main dialog box loop { if(current_field==4) // If field is the button { od_set_colour(L_GREEN,D_BLUE); // Highlight button draw_button(); do // Loop until user presses [TAB], [ENTER], or [ESC] { choice=od_get_key(TRUE); } while(choice!=9 && choice!=13 && choice!=27); od_set_colour(L_CYAN,D_BLUE); // Un-highlight button draw_button(); =============================================================================== OpenDoors 5.00 Manual End of Page 67 if(choice==13) return(TRUE); // If [ENTER] was pressed if(choice==27) return(FALSE); // If [ESC] was pressed current_field=1; // Otherwise, [TAB] was pressed } switch(current_field) // According to selected field { // Input from the appropriate line case 1: choice=od_edit_str(filename,"FFFFFFFFFFFF",6,26, 0x1b,0x1a,176, EDIT_FLAG_EDIT_STRING| EDIT_FLAG_ALLOW_CANCEL| EDIT_FLAG_FIELD_MODE| EDIT_FLAG_KEEP_BLANK); break; case 2: choice=od_edit_str(description, "*******************", 7,26,0x1b,0x1a,176, EDIT_FLAG_EDIT_STRING| EDIT_FLAG_ALLOW_CANCEL| EDIT_FLAG_FIELD_MODE| EDIT_FLAG_KEEP_BLANK); break; case 3: choice=od_edit_str(private,"Y",8,26, 0x1b,0x1a,176, EDIT_FLAG_EDIT_STRING| EDIT_FLAG_ALLOW_CANCEL| EDIT_FLAG_FIELD_MODE); } // If user pressed [ESCape] if(choice==EDIT_RETURN_CANCEL) return(FALSE); // If user choice to go to previous field if(choice==EDIT_RETURN_PREVIOUS) { if(current_field==1) // If at first field { current_field=4; // Go to last field } else // If not at first field { --current_field; // Go to previous field } } else // If user chose next field { ++current_field; // Go to next field } } } =============================================================================== OpenDoors 5.00 Manual End of Page 68 void draw_button(void) // Function to display the button { od_draw_box(12,10,23,12); // Draw box for button od_set_cursor(11,14); od_disp_str("Continue"); // Display text in button } =============================================================================== OpenDoors 5.00 Manual End of Page 69 OD_EDIT_STR() ------------------------------------------------------------------------------- PURPOSE Allows you to perform formatted input with full line editing features, etc., in ANSI/AVATAR/RIP graphics mode. FORMAT unsigned int od_edit_str(char *input_string, char *format_string, int row, int col, unsigned char normal_colour, unsigned char highlight_colour, char character, unsigned int flags); RETURNS This function will return one of the following values. Note that some of these values will only be applicable in certain cases. For example, EDIT_RETURN_CANCEL will never be returned if you have not enabled the cancel feature of this function. EDIT_RETURN_ERROR Indicates that an error has occurred, and the edit function was unable to run. This will occur if there is an error in one of the parameters, or if ANSI/AVATAR/RIP graphics is not available EDIT_RETURN_CANCEL Indicates that the user pressed the cancel key [ESC], and that the string was left unaltered. EDIT_RETURN_ACCEPT Indicates that the user pressed the accept key [Enter], or that the auto- enter feature was activated. EDIT_RETURN_PREVIOUS Indicates that the user wishes to move to the previous field, by pressing [UP ARROW], [SHIFT]-[TAB], etc. EDIT_RETURN_NEXT Indicates that the user wishes to move to the next field, by pressing [DOWN ARROW], [TAB], etc. DESCRIPTION To perform string input within OpenDoors, one of two functions can be used, od_input_str() and od_edit_str(). The first function, od_input_str(), allows simple line input and editing, and can be used in ASCII, ANSI, AVATAR and RIP modes. The second function, od_edit_str(), allows many formatted input options, advanced line editing, and other features, but requires the use of ANSI, AVATAR or RIP graphics modes. =============================================================================== OpenDoors 5.00 Manual End of Page 70 The od_edit_str() function provides a great deal of features and functionality, and as such, may appear to be one of the most complicated OpenDoors functions. The simple fact that the function accepts eight parameters may make the od_edit_str() function seem daunting. However, you need not concern yourself with all of the features available from the od_edit_str() function in order to make use of it. Reading through this section should give you some idea of what is possible with the od_edit_str() function, and the following examples should help to demonstrate the use of this function. The first thing to remember about the od_edit_str() function is that it requires ANSI/AVATAR/RIP graphics, as the graphics control codes are needed for the advanced editing capabilities provided by the od_edit_str() function. Thus, you will only want to use the od_edit_str() in one of two cases; either in a door which requires ANSI/AVATAR/RIP graphics to operate, or in the case that you program tests for the availability of ANSI/AVATAR/RIP graphics, and only calls od_edit_str() if graphics is available. If ANSI/AVATAR/RIP graphics is not available, your program should use the od_input_str() function instead. As mentioned above, the od_edit_str() function allows for advanced line editing, such as inputting and deleting text from the middle of the string (whereas the od_input_str() function only allows editing from the end of the string, such as backspacing to erase a mistake). The edit functions available from the od_edit_str() are listed below. Note that some of these functions may or may not be available, depending upon the capabilities of the user's terminal program. While there is no single standard used for the transmission of special edit keys such as the arrow keys, the od_edit_str() function makes as much effort as possible to make all of the edit features available to most terminal programs. Many of the edit functions can be accesses using either [CONTROL]-key combinations or special keys such as the arrow keys, delete key, and so on. OpenDoors will recognize most of these special control keys when sent as either an ANSI control sequence (which is sent by most terminal programs), or as a DoorWay style scan code / ASCII code sequence (which is also available from many terminal programs, but is not usually required). The od_edit_str() edit functions are as follows. Note that all edit functions are always available from the local keyboard. HOME - Moves the cursor to the beginning of the line being edited. Press the [HOME] key, either in DoorWay mode or from the local keyboard. END - Moves the cursor to the end of the line being edited. Press the [END] key, either in DoorWay mode or from the local keyboard. =============================================================================== OpenDoors 5.00 Manual End of Page 71 DELETE CHARACTER - Deletes the character under the cursor. Press [DELete] on the local keyboard, in DoorWay mode, and under many terminal programs without DoorWay mode. Alternatively, press [CONTROL]-[G]. BACKSPACE - Deletes the character left of the cursor. Press [BACKSPACE] or [CONTROL]-[H]. TOGGLE INSERT MODE - Switches the od_edit_str() function between insert mode and overwrite mode. Press [INSert], either in DoorWay mode, or from the local keyboard. Alternatively, press [CONTROL]-[V]. CURSOR LEFT - Moves the cursor left one character. Press [LEFT ARROW] on the local keyboard, in DoorWay mode, and under many terminal programs without DoorWay mode. Alternatively, press [CONTROL]-[S]. CURSOR RIGHT - Moves the cursor right one character. Press [RIGHT ARROW] on the local keyboard, in DoorWay mode, and under many terminal programs without DoorWay mode. Alternatively, press [CONTROL]-[D]. ERASE ENTIRE LINE - Press [CONTROL]-[Y]. ACCEPT INPUT - Press the [ENTER] / [RETURN] line to accept the input. Alternatively, press [CONTROL]-[Z]. Note that this key will only work when the current input is "valid" (ie, it conforms to the format string, which is described below) CANCEL INPUT - Only available if specifically enabled on the od_edit_str() command line. Press [ESCape]. NEXT FIELD - If enabled, allows the user to move to the next field in a dialog box / form. Press [DOWN ARROW] in DoorWay mode and under many terminal programs without DoorWay mode. Alternatively, press [TAB]. Note that the [DOWN ARROW] key is NOT usually available from the local keyboard, as it is usually used to adjust the user's remaining time. PREVIOUS FIELD - If enabled, allows the user to move to the previous field in a dialog box / form. Press [UP ARROW] in DoorWay mode and under many terminal programs without DoorWay mode. Alternatively, press [SHIFT]-[TAB] on the local keyboard or in DoorWay mode. Again, note that the [UP ARROW] key is NOT usually available from the local keyboard, as it is usually used to adjust the user's remaining time. Let us now look at the parameters which the od_edit_str() function accepts. The first parameter, input_string, is a =============================================================================== OpenDoors 5.00 Manual End of Page 72 pointer to the string where the user's input should be stored. It is important that this string be long enough to accommodate the longest input your format string will permit, including the '\0' C string terminator (ie, the string should be one character greater than the length of the format string, not including the format string's ' and " characters). The second parameter, format_string, is a pointer to a string which specifies the format and maximum length of the input the od_edit_str() function should accept. Using the format string, not only do you specify the length of the input field, but you can also force the user's input into certain formats. For example, if you wished to input a North American style phone number, you could use a format string of "###-###-####". Then regardless of whether the user typed any dash character or not, their input would be converted, as they type, to the format of the phone number 613-526-4466. You could also specify a format string such of "MMMMMMMMMMMMMMMMMMMMMMMMMMMMMM", which would permit the user to enter a name of up to 30 characters. Note that since the cursor can be moved to the position immediately following the last character, a the input field for a 30 character string will occupy 31 columns on the screen. The od_edit_str() function would then automatically capitalize the name, so that the first character of each word is capitalized, and the remain characters of the word is in lower case. Even if the user were to move the cursor to the middle of the string they had entered, and add or delete a space (and thus either make one work two or two words one), od_edit_str() would re- format the string to reflect the change. The valid characters for the format sting, along with their meanings, are listed below. Note that the format string is NOT case sensitive (except for literal strings delimited by the '' or "" characters), and space characters can be added at any point to increase legibility. # Indicates that numeric characters from '0' to '9' are valid for this position % Indicates that numeric characters from '0' to '9', and the space character (' ') are valid for this position. 9 Indicates that numeric characters from '0' to '9', along with '.', '-' and '+' are valid for this position. This format style is intended for floating-point numeric input. ? Indicates that any character is valid for this position. * Indicates that any printable character, from ASCII 32 to ASCII 127, is valid for this position. A Indicates that alphabetical characters 'A' to 'Z', 'a' to 'z' and space (' ') are valid for this position. =============================================================================== OpenDoors 5.00 Manual End of Page 73 C Indicates that city name characters are valid for this position. As with the 'M' format character, words are automatically capitalized so that the first letter is in upper case, and all subsequent letters are in lower case. In addition to permitting alphabetical characters and the space (' ') character, the ',' and '.' characters are also accepted in this position. D Indicates that date characters '0' to '9', '-' and '/' are valid for this position. F Indicates that MS-DOS filename characters are valid for this position. H Indicates that hexidecimal character '0' to '9', 'A' to 'F' and 'a' to 'f' are valid for this position. L Indicates that only lower case alphabetical characters 'a' to 'z', and the space (' ') character is valid for this position. However, if the user attempts to enter an upper case alphabetical character in this position, it will automatically be converted to the lower case equivalent. M Indicates that name characters are valid for this position. These characters are the alphabetical characters 'A' to 'Z', 'a' to 'z', and the space character (' '). A character's case is converted such that the first character of a word is in upper case, and all other letters are in lower case. T Indicates that telephone number character '0' to '9', '(', ')', '-' and ' ' are valid for this position. U Indicates that only upper case alphabetical characters 'A' to 'Z', and the space (' ') character is valid for this position. However, if the user attempts to enter a lower case alphabetical character in this position, it will automatically be converted to the upper case equivalent. W Indicates that MS-DOS filename characters are permitted in this position, including the '*' and '?' wildcard characters. X Indicates that alphanumeric characters 'A' to 'Z', 'a' to 'z', '0' to '9' and ' ' are valid for this position. Y Indicates that yes/no characters 'Y', 'N', 'y', 'n' are valid for this position. The characters are automatically converted to upper case. '/" Single or double quotes can be used to specify sequences of characters that should appear at the same location in the input string (referred to elsewhere as "literal strings"). When the user is entering the string, these characters are =============================================================================== OpenDoors 5.00 Manual End of Page 74 automatically supplied, and the user is not required to type them. Literal strings must begin and end with the same quote character. Remember that the double quote (") character must be imbedded in C strings by preceding the quote character with a \ (backslash) character. The third and fourth parameters, row and col specify the location on the screen where the first (left most) character of the input field should be located. These parameters are identical to the row and col parameters passed to the od_set_cursor() function. In other words, row specifies the line number on the screen, where 1 is the first line, and col specifies the column across the screen, where 1 is the first column. The fifth and sixth parameters, normal_colour and highlight_colour, allow you to specify the colour of the input field. The fifth parameter, normal_colour, specifies the colour of the input field when input is not taking place and the sixth parameter, highlight_colour, specifies the colour of the field while input is taking place. Thus, if you had several input fields on the screen at one time, you would be able to make is easier for the user to identify the currently active field by having the field currently accepting input highlighted in a colour distinct from the other fields. When the od_edit_str() function begins, it will change the current colour of the field from the normal colour to the highlighted colour. Then, when the od_edit_str() function exits, it will change the current colour of the field back to its normal colour. If you do not wish to have the field highlighted, you can set both of these parameters to the same value, and disable field re-drawing by using the eighth parameter, flags. The seventh parameter accepted by the od_edit_str() function, character, will serve one of two purposes. Normally, this parameter will specify a background character to display in the unfilled portion at the end of the input field. This can be set to a character, such as the ASCII 177 grey block character, to produce a visual background to the field. Doing this will show the user visually how long the field is, and how many character they will be permitted to type into the field. Normally, this field will be displayed during input, and removed when the od_edit_str() function exits. However, you may cause the background to remain in place using the eighth parameter, flags. If you do not wish to have this "background" visual field effect, simply set the character parameter to a space (ASCII 32). In password input mode, this parameter will instead specify the character to display in place of characters typed by the user. In this case, the background display character defaults to the space (ASCII 32) character. The eighth, and last, parameter accepted by the od_edit_str() function is the flags parameter. This parameter is a bit-mapped flags variable which allows you to control special features of =============================================================================== OpenDoors 5.00 Manual End of Page 75 the od_edit_str() function. More than one of these settings may be specified by listing a chain of the values, separated by the bitwise-or (|) operator. If you do not wish to turn on any of these modes, simply pass the EDIT_FLAG_NORMAL value as the flags parameter. EDIT_FLAG_NORMAL - Default setting, use this value of none of the other flags below are active. EDIT_FLAG_NO_REDRAW - When set, prevents the od_edit_str() function from re-drawing the input string and field when it starts up and exits. If you set this flag, the normal_colour and highlight colour should contain the same value. If background character (the character parameter) is not a space (ASCII 32) character, you must draw the field background prior to calling od_edit_str(). Also, if you are calling od_edit_str() with the EDIT_FLAG_EDIT_STRING flag set, you must display the existing string in the field prior to calling od_edit_str(). EDIT_FLAG_FIELD_MODE - Setting this flag specifies that od_edit_str() should operate in field input mode. In field input mode, the user may finish entering their input by pressing the previous field or next field button (arrow keys, tab keys, etc.), as described above. If the user chooses to finish and accept their input by pressing one of these keys, the od_edit_str() return value will reflect which choice they made. This will allow you to make it possible for the user to move between a number of input fields in a form / dialog box, as demonstrated in the example accompanying the od_draw_box() function. EDIT_FLAG_EDIT_STRING - Setting this flag specifies that od_edit_str() should edit a pre-existing string, instead of starting with a blank string. In this case, the input_string parameter MUST point to an initialized string. This string may either contain some text, or be empty, but od_edit_str() will expect to find a string terminator ('\0') character, and will begin editing the contents of the string prior to that character. If you do not set the EDIT_FLAG_EDIT_STRING flag, the previous contents of the input_string parameter is not significant, as od_edit_str() will automatically start with a blank string. EDIT_FLAG_STRICT_INPUT - Setting this flag causes the od_edit_str() function to operate in "strict" input mode, which may be desirable if your input format contains more than one type of input. Normally, if you were inputting such a string, the user would be able to move to the middle of the string, and insert any text. Doing so would cause the rest of the input line =============================================================================== OpenDoors 5.00 Manual End of Page 76 to shift right. However, in cases where your format string specifies different types of character to be permitted in different positions, this can cause the input to be changed so that it no longer conforms to the format string. In this case, the user's input will no longer be valid, and the user will not be able to exit the function by pressing [ENTER] (although [ESCAPE] will still be available, if you activated it) until they change their input. However, when strict input mode is turned on, od_edit_str() will restrict the ways in which the user is permitted to edit the string, to prevent just such a case from occurring. EDIT_FLAG_PASSWORD_MODE - Setting this flag causes the od_edit_str() function to operate in "password" mode. In password mode, the characters typed by the user will be hidden, displayed instead as the blank character specified in the "character" parameter. EDIT_FLAG_ALLOW_CANCEL - When this flag is set, the user will be able to cancel their current input and abort the editing process by pressing their [ESCAPE] key. When they do so, any changes they have made to the input field will be canceled, and replaced by the original contents of the string. The od_edit_str() function will then exit, indicating that the user has canceled their input. EDIT_FLAG_FILL_STRING - When set, this flag will force the user to enter a string that fills the entire length of the format string. Normally, the user will be able to enter a string of any length up to the maximum length specified by the format string. However in some cases, such as when inputting a date, you will want to have the input field filled. (Otherwise, the user would be able to enter only the first part of the date.) EDIT_FLAG_AUTO_ENTER - When set, this flag will cause the od_edit_str() function to automatically simulate pressing of the [ENTER] key when the string is filled. This can be used to cause the od_edit_str() function to finish inputting as soon as a valid string is entered, instead of having to wait for the user to press [ENTER] / [RETURN]. EDIT_FLAG_AUTO_DELETE - When set, along with the EDIT_FLAG_EDIT_STRING flag, this flag will activate the auto-delete feature of the od_edit_str() function. When auto-delete is active, if the first key pressed by the user is not an edit control key, the existing text will automatically be deleted, and a totally new string accepted from the user. This could be useful when you are allowing the user to go back to edit a previous input. If the user wishes to only change part =============================================================================== OpenDoors 5.00 Manual End of Page 77 of the old string, they can move the cursor to the location where they wish to make the change, and perform their editing. However, if the user wishes to completely replace the old string with a new one, they can simply begin to type, and the old string will automatically be deleted, and the new string accepted. EDIT_FLAG_KEEP_BLANK - Normally, OpenDoors will only display the input field background (as passed in the "character" parameter) while the user is editing the string, and will remove it when the od_edit_str() function exits. However, you may wish to continue having this field displayed after input has taken place, and the od_edit_str() function has exited. In this case, setting this flag will cause the background characters to remain visible after input has finished. EDIT_FLAG_PERMALITERAL - When the format string contains literal characters (such as forcing a ':' character to be added to a time input by using the format string "##':'##':'##"), the od_edit_str() function can operate in one of two modes. In the default mode, the literal characters will only be displayed when they have been automatically added to the string. For instance, if you were inputting the current time using the above format string, this mode would result in the input field initially being blank. When the user types the first digit of the time, that number would appear. When the user types the second digit of the time, that number will appear, and then the colon character will automatically be added by OpenDoors. However, you can also set the od_edit_str() function to operate in "PermaLiteral" mode, by setting this flag. When the EDIT_FLAG_PERMALITERAL flag is set, the input field will initially contain the literal characters (ie, the colons in our example), with the cursor still located at the leftmost position in the input field. In this mode, the literal character become a permanent part of the input field, and can not be moved or deleted by the user - instead the cursor simply skips over the literal character's position. EDIT_FLAG_LEAVE_BLANK - This flag applies to the special case where the first character or characters of the format string are literals. By default, the od_edit_str() function will always return a string containing at least these first literal characters. However, you can alter this behaviors by setting this flag. When set, if no non-literal characters have been entered in the string, od_edit_str() will return an empty string. SEE ALSO od_input_str(), od_get_char(), od_clear_keybuffer() =============================================================================== OpenDoors 5.00 Manual End of Page 78 EXAMPLE Below are several examples of typical uses of the od_edit_str() function. For the sake of simplicity, all of these examples perform their input beginning at the top, left hand corner of the screen, and store the user's input in the string variable named "string". For an example of the user of the od_edit_str() function in a dialog-box / form entry application, see the example accompanying the od_draw_box() function. To input a name with a maximum of 25 characters, having the first letter of each word automatically capitalized: od_edit_str(string, "MMMMMMMMMMMMMMMMMMMMMMMMM", 1, 1, 0x03, 0x21, 176, EDIT_FLAG_NORMAL); To input a North American style phone number, requiring that all digits be filled, and running in "strict input" mode: od_edit_str(string, "###'-'###'-'####", 1, 1, 0x03, 0x21, 176, EDIT_FLAG_FILL_STRING| EDIT_FLAG_STRICT_INPUT); To allow the user to edit a previously entered 20 character string, with auto-delete mode on. Any characters will be permitted in the string. Remember that when the EDIT_FLAG_EDIT_STRING flag is set, the string must be initialized prior to calling the od_edit_str() function. od_edit_str(string, "????????????????????", 1, 1, 0x03, 0x21, 176, EDIT_FLAG_EDIT_STRING| EDIT_FLAG_AUTO_DELETE); To input a password of up to 16 characters from the user. Here, the password will only be permitted to contain upper case characters, and the od_edit_str() password mode is used, with a small block displayed in place of any characters typed: od_edit_str(string, "UUUUUUUUUUUUUUUU", 1, 1, 0x03, 0x21, 254, EDIT_FLAG_PASSWORD_MODE); To input a two-digit number from the user, requiring that both digits be filled, and automatically accepting the input after the two digits have been entered (not requiring the user to press [ENTER]): od_edit_str(string, "##", 1, 1, 0x03, 0x21, 176, EDIT_FLAG_FILL_STRING| =============================================================================== OpenDoors 5.00 Manual End of Page 79 EDIT_FLAG_AUTO_ENTER); To input a filename to download, as a field in a dialog box. Here, the filename will be permitted to contain valid filename characters, and the od_input_str() function will operate in field mode, with the cancel [ESCape] key enabled. Also, string edit mode will be enabled, allowing the user to edit a previously entered line, and the EDIT_FLAG_KEEP_BLANK flag will be set, causing the field background to remain displayed after the user exits. This time, however, auto-delete mode will not be used. Note that this combination of parameters expects that the field and it's contents will have already been displayed, prior to calling the od_edit_str() function. od_edit_str(string, "WWWWWWWWWWWW", 1, 1, 0x03, 0x21, 176, EDIT_FLAG_EDIT_STRING| EDIT_FLAG_FIELD_MODE| EDIT_FLAG_ALLOW_CANCEL| EDIT_FLAG_KEEP_BLANK); To input a string without the field background and line redrawing before and after input takes place: od_edit_str(string, "******************************", 1, 1, 0x07, 0x07, ' ', EDIT_FLAG_NO_REDRAW); To input a date, using permaliteral mode. Here, the month is entered by a three digit short form ("JAN", "FEB", etc.), and the literal characters such as the '-' and the "19" are a permanent part of the input field: od_edit_str(string,"UUU'-'##'-19'##", 1, 1, 0x03, 0x21, 176, EDIT_FLAG_PERMALITERAL| EDIT_FLAG_FILL_STRING); =============================================================================== OpenDoors 5.00 Manual End of Page 80 OD_EXIT() ------------------------------------------------------------------------------- PURPOSE The OpenDoors program termination function FORMAT void od_exit(int errorlevel,char term_call); RETURNS N/A DESCRIPTION When writing a door program, you MUST USE THIS FUNCTION when you want your Door to exit. This function will close the serial port, re-write changed information to the EXITINFO.BBS file, call your end-of-program function (if any), and then exit with the errorlevel specified in the first parameter. Also, if the second parameter, "term_call", is set to TRUE, od_exit() will also log the user off (for options such as logging off within the door - as shown in the example below). This is accomplished by lowering the DTR line to the modem, causing the modem to hangup. When control is returned to the BBS, it will then detect that the user is no longer online, and will carry out its own logoff processing. If you wish for your program to always perform any activities prior to exiting, such as updating or closing data files, you should set a function to be executed from within the od_exit() function. This is accomplished by using the od_control. od_before_exit variable, as described in the section on the OpenDoors control structure in chapter 5. Use of this variable will allow your program to always carry out these activates, even if OpenDoors decides to call the od_exit() function itself, such as when a user hangs up on the door. Note that in special cases, you may use the od_control.od_disable variable to prevent the od_exit() function from re-writing the door information file. Also, you may use the od_control.od_noexit variable to shutdown door operations without actually exiting your program. Both of these variables are described in chapter 5. SEE ALSO od_init() EXAMPLE The example below demonstrates a function which a door could execute when the user chooses to exit the door. This function will ask the user whether they wish to exit the door and return =============================================================================== OpenDoors 5.00 Manual End of Page 81 to the BBS, simply logoff of the BBS, or continue using the door. The example function will then call od_exit() if the user wishes to exit the door, or return control to the function which called it, if the user does not wish to exit: void goodbye(void) { char pressed; /* Display choices to user */ od_disp_str("You have chosen to exit this door.\n\r"); od_disp_str("Do you wish to:\n\r"); od_disp_str(" [R]eturn to the BBS\n\r"); od_disp_str(" [L]ogoff of the BBS\n\r"); od_disp_str(" [C]ontinue using the door\n\r"); for(;;) /* loop until user makes valid choice */ { pressed=od_get_key(TRUE); /* Get key from user */ /* If user selects R, exit without hanging up */ if(pressed=='R' || pressed=='r') od_exit(40,FALSE); /* If user selects L, hangup and then exit */ if(pressed=='L' || pressed=='l') od_exit(41,TRUE); /* If user selects C, return and allow door to continue */ if(pressed=='C' || pressed=='c') return; } } =============================================================================== OpenDoors 5.00 Manual End of Page 82 OD_GET_ANSWER() ------------------------------------------------------------------------------- PURPOSE Function to allow the user to respond to a prompt using only certain keys. FORMAT char od_get_answer(char *string); RETURNS User's response to prompt DESCRIPTION This function can be used to get a response from the user, when only particular responses should be accepted. The parameter to the od_get_answer() function is simply a string listing the valid responses. The function will wait until the user selects one of the valid responses, and then return that response. The function is case insensitive, and will return the character in the same case that was supplied to it in the string. SEE ALSO od_get_key(), od_hotkey_menu() EXAMPLES od_get_answer("YN"); - If the user presses 'y', will return 'Y'. od_get_answer("yn"); - If the user presses 'y', will return 'y'. od_get_answer("ABC 123\n\rZ"); - Valid responses will be: [A], [B], [C], [SPACE], [1], [2], [3], [ENTER], [Z] =============================================================================== OpenDoors 5.00 Manual End of Page 83 OD_GET_KEY() ------------------------------------------------------------------------------- PURPOSE Function to input a key from the user FORMAT int od_get_key(int wait); RETURNS The next key waiting from the keyboard, or 0 if none. DESCRIPTION This function retrieves the next key waiting in the OpenDoors keyboard buffer (see the description of the od_clear_keybuffer() function, on page 53, for more information on the OpenDoors keyboard buffer). The od_get_key() function allows your door to retrieve both those keystrokes pressed by the user, and the keystrokes pressed on the sysop keyboard (other than the sysop function keys), in the sequence they were pressed. Since input is accepted from both sources, it is possible for the sysop, as well as the remote user, to make selections and control the door. Door input with OpenDoors can be accomplished with this function, with the od_input_str() function or with the od_edit_str() function. The od_input_str() and od_edit_str() functions is used to input an entire sequence of characters from the user (a string), and requires the user to press the [Enter] key when they are finished typing their input. On the other hand, the od_get_key() function is used to input a single keystroke (one character) from the user, and allows the user to make choices without having to press the enter key. The od_get_key() function accepts a single parameter, which determines whether or not it should wait for the user to press a key, if they have not already done so. If you pass a FALSE value to od_get_key(), then the function will not wait for a key to be pressed at the keyboard, but instead return a 0 if there are no keys waiting in the buffer. If you pass a TRUE value to od_get_key(), then this function will instead wait for a key to be pressed. Also, while waiting for the user to press a key, the od_get_key() function will give up the processor to other waiting programs, if you door is running under DesqView. If you are waiting for the user to make a choice from a menu or list of options, you will most likely pass a TRUE to the od_get_key() function, indicating that you wish for it to wait until a key is pressed. However, if you wish to continue other processing if no key is yet available from the keyboard, you should pass a FALSE to the od_get_key() function. For example, =============================================================================== OpenDoors 5.00 Manual End of Page 84 if you are displaying a screen of text, and wish to allow the user to pause or abort the display, you would simply call the od_get_key() function every few moments, passing it a value of FALSE. You would then be able to check if any control keys have been pressed, and if not, continue displaying text. The od_get_key() function returns the ASCII value representing the keystroke that was made. If you are waiting for the user to make a particular choice, perhaps from a menu, you will most likely store the value returned by od_get_key() in a variable of type char. For example: char key; ... key=od_get_key(TRUE); You would then be able to determine which key the user pressed by testing the value of key, either by comparing it's numerical ASCII value, or by comparing it to a character constant. If you are testing for a non-character key, such as [ESCape], [Tab] or [Return], you may wish to use the ASCII value of that key. For example, if you wished to take some action in the case that the user presses the [Enter]/[Return] key, who's ASCII value is 13, you could do: key=od_get_key(TRUE); /* Get keypress from user */ if(key==13) /* If key was [Enter]/[Return] */ { ... /* Whatever you want to do */ } A complete reference of all the ASCII values is listed below. To determine whether input originated from the local or remote keyboards, see the OpenDoors control structure variable od_last_input. If you wish, instead, to respond to the user pressing a character key (perhaps as a choice from a menu), you can do so by using character constants, such as 'c', '6', or 'F'. Also, when testing for an alphabetical character, you will probably want to check for the user pressing either the upper or lower- case version of the letter. For example, if you wished to have the user press the [Y] key to continue, you could test for either an upper or lower-case Y as follows: key=od_get_key(TRUE); /* Get keypress from user */ if(key=='y' || key=='Y') /* If key was [y]/[Y] */ { ... /* Whatever you want to do */ } =============================================================================== OpenDoors 5.00 Manual End of Page 85 The chart below lists the decimal value and corresponding keystroke(s) of each of the ASCII values from 0 to 127. ASCII KEYSTROKE | ASCII KEYSTROKE ----- ------------------------------ | ----- ---------------------- 0 [Control]-[@] | 15 [Control]-[O] 1 [Control]-[A] | 16 [Control]-[P] 2 [Control]-[B] | 17 [Control]-[Q] 3 [Control]-[C] | 18 [Control]-[R] 4 [Control]-[D] | 19 [Control]-[S] 5 [Control]-[E] | 20 [Control]-[T] 6 [Control]-[F] | 21 [Control]-[U] 7 [Control]-[G] | 22 [Control]-[V] 8 [Control]-[H]/[Backspace] | 23 [Control]-[W] 9 [Control]-[I]/[Tab] | 24 [Control]-[X] 10 [Control]-[J] | 25 [Control]-[Y] 11 [Control]-[K] | 26 [Control]-[Z] 12 [Control]-[L] | 27 [ESCape] 13 [Control]-[M]/[Enter]/[Return] | 32 [SpaceBar] 14 [Control]-[N] | ASCII KEYSTROKE | ASCII KEYSTROKE | ASCII KEYSTROKE | ASCII KEYSTROKE ----- --------- | ----- --------- | ----- --------- | ----- --------- 33 '!' | 57 '9' | 80 'P' | 104 'h' 34 '"' | 58 ':' | 81 'Q' | 105 'i' 35 '#' | 59 ';' | 82 'R' | 106 'j' 36 '$' | 60 '<' | 83 'S' | 107 'k' 37 '%' | 61 '=' | 84 'T' | 108 'l' 38 '&' | 62 '>' | 85 'U' | 109 'm' 39 '\'' (') | 63 '?' | 86 'V' | 110 'n' 40 '(' | 64 '@' | 87 'W' | 111 'o' 41 ')' | 65 'A' | 88 'X' | 112 'p' 42 '*' | 66 'B' | 89 'Y' | 113 'q' 43 '+' | 67 'C' | 90 'Z' | 114 'r' 44 ',' | 68 'D' | 91 '[' | 115 's' 45 '-' | 69 'E' | 92 '\\' (\) | 116 't' 46 '.' | 70 'F' | 93 ']' | 117 'u' 47 '/' | 71 'G' | 94 '^' | 118 'v' 48 '0' | 72 'H' | 95 '_' | 119 'w' 49 '1' | 73 'I' | 96 '`' | 120 'x' 50 '2' | 74 'J' | 98 'b' | 121 'y' 51 '3' | 75 'K' | 99 'c' | 122 'z' 52 '4' | 76 'L' | 100 'd' | 123 '{' 53 '5' | 77 'M' | 101 'e' | 124 '|' 54 '6' | 78 'N' | 102 'f' | 125 '}' 55 '7' | 79 'O' | 103 'g' | 126 '~' 56 '8' | | | 127 [DELete] =============================================================================== OpenDoors 5.00 Manual End of Page 86 SEE ALSO od_input_str(), od_edit_str(), od_clear_keybuffer() EXAMPLE For examples of the use of the od_get_key() function, see the examples in the description portion, above, and the examples for the od_exit() and od_clear_keybuffer() functions. For further examples of this function, see the example door EZVote, described in the section beginning on page 38. =============================================================================== OpenDoors 5.00 Manual End of Page 87 OD_GETTEXT() ------------------------------------------------------------------------------- PURPOSE Stores a rectangular region of the screen in an array, to later be redrawn using od_puttext(). Requires ANSI, AVATAR or RIP modes. FORMAT int od_gettext(int left, int top, int right, int bottom, void *block); RETURNS TRUE on success FALSE on failure DESCRIPTION This function stores the contents (both text and colour information) of the rectangular portion of the screen denoted by the variables "left", "top", "right" and "bottom" into the buffer pointed to by block. The saved portion of the screen may then be restored using od_puttext(). The buffer must be large enough to store two bytes for every character in the specified rectangle. In other words, the required size of the buffer, in bytes, is: length * width * 2 The parameters "left" and "right" are column numbers from 1 to 80, and the parameters "top" and "bottom" are row numbers between 1 and 23. This function has no effect on the current text colour or cursor position. ANSI, AVATAR or RIP mode is required for this function. If you wish to save and restore the entire screen, you may use the od_save_screen() and od_restore_screen() functions, which can be used in all display modes. If this function fails for any reason, a value of FALSE is returned, and the od_control.od_error variable is set to indicate the reason for the failure. For more information on the od_control.od_error variable, see page 182. SEE ALSO od_puttext(), od_save_screen(), od_restore_screen(), od_scroll(), od_window_create(), od_window_remove() EXAMPLE =============================================================================== OpenDoors 5.00 Manual End of Page 88 OD_HOTKEY_MENU() ------------------------------------------------------------------------------- PURPOSE Function to display a menu file with hotkeys FORMAT char od_hotkey_menu(char *filename, char *hotkeys, char wait); RETURNS Key pressed in response to menu, or '\0' if none. DESCRIPTION This function can be used to display a menu from an ASCII, ANSI, AVATAR or RIP file, allowing the user to select an option at any time while the menu is being displayed. The od_hotkey_menu() function is quite similar to the od_send_file() function, and you should probably familiarize yourself with that function if you are going to use od_hotkey_menu(). Like od_send_file(), od_hotkey_menu() will display the file specified by filename, using the appropriate terminal emulation. If no extension is provided for the filename, OpenDoors will automatically search for matching files ending in .ASC, .ANS and .AVT extensions. OpenDoors will the select the appropriate file to display, based on the available files and available terminal emulation. The second parameter, hotkeys, is a string specifying the valid responses to the menu, in the same format as the string passed to the od_get_answer() function. If any of the characters listed in this string are pressed, either uppercase or lowercase versions, OpenDoors will immediately stop displaying the menu, and return with the value of the key pressed. The case (upper or lower) returned will always be identical to the case used in the hotkeys string. You can include the [ENTER] key as a valid hot key by including the \n character in the hotkey string. The third parameter passed to od_hotkey_menu(), wait, specifies whether OpenDoors should wait after displaying the menu for the user to make a valid selection from the menu (TRUE), or if it should exit immediately (FALSE). Normally, you will want to use the TRUE value when calling this function. This will allow you to use a single function call that will display the menu and always return the user's selection. If you wish to gain control as soon as OpenDoors has displayed the menu, you may specify FALSE for this parameter. In this case, if the user does not press any of the valid hot keys while the menu is being sent, the function will return the character '\0'. SEE ALSO od_send_file(), od_get_answer() =============================================================================== OpenDoors 5.00 Manual End of Page 89 EXAMPLE As an example of the use of the od_hotkey_menu() function, consider the following code fragment: for(;;) /* Main pogram loop */ { /* Display menu and get user's choice */ char choice=od_hotkey_menu("MAINMENU","123Q",TRUE"); switch(choice) /* Perform the appropriate action */ { case '1': od_printf("You selected one.\n\r"); break; case '2': od_printf("You selected two.\n\r"); break; case '3': od_printf("You selected three.\n\r"); break; case 'Q': od_exit(FALSE,10); } } This is an example of the main menu loop of a simple door that uses the od_hotkey_menu() function. The program will continue executing the for(;;) loop until the user chooses to exit the door. On each iteration of the loop, the od_hotkey_menu() function is called, to display the door's menu from the file MAINMENU.A??. The appropriate .ASC/.ANS/.AVT file will be chosen and displayed as the menu. The possible choices that may be made from the menu are specified by the string "123Q". Thus, whenever the user presses one of the keys [1], [2], [3] or [Q], the od_hotkey_menu() function will return immediately with the value of the key pressed. If the menu is still being displayed at the time when the key was pressed, menu display will cease at that moment. The program then executes a case statement, to respond to the user's key appropriately. If the user presses [1], [2] or [3] this door will output a simple message to the screen. If the user presses the [Q] key, the door will pass control back to the BBS. =============================================================================== OpenDoors 5.00 Manual End of Page 90 OD_INIT() ------------------------------------------------------------------------------- PURPOSE To initialize OpenDoors activities FORMAT void od_init(void); RETURNS N/A DESCRIPTION This function initializes any door running under OpenDoors. This function must be called manually if you wish to access data about the user, etc., before you call any other OpenDoors functions. However, if you do not explicitly call the od_init() function, it will be called automatically on the first call to any other OpenDoors function. The od_init() function reads information from the door information file, initializes communications with the modem, displays the status line, and sets up OpenDoors' internal data structures. For more information on what data is and is not available before od_init() has been called, please refer to the chapter on the OpenDoors control structure, which begins on page 145. The od_init() function will read the door information file which is located in the directory specified by the variable od_control.info_path. If this variable has not been set prior to calling the od_init() function, OpenDoors will expect to find the door information file in the current directory. Thus, if you wish your door to be able to be run in a directory other than the BBS system directory, it would be a good idea to allow the sysop using your door to specify the location of the door information file. For an example of setting the od_control.info_path variable, please see the example program located on page 148. Also note that you can prevent the od_init() function from carrying out some of it's normal activities, such as attempting to read a door information file, by the use of the od_control.od_disable variable, as described in the section on the OpenDoors control structure, which begins on page 145. SEE ALSO od_exit() EXAMPLE At times, you may wish to write a door program which will require a maintenance utility to be run on a regular basis. For example, a game door may have to have its system files updated =============================================================================== OpenDoors 5.00 Manual End of Page 91 on a daily basis, by having a utility program run in a system event each day at midnight. One way of accomplishing this would be to have your door package include two .EXE files, one being the actual door program, and the other being a utility program. However, another option would be to have both the door and maintenance functions to be accessible from a single .EXE file, in order to simplify use of the door for the sysop. In this case, you would want to test the command line to determine whether your program should run in door mode or maintenance mode. You would then only execute the od_init() function, along with the rest of your door code, if you program were running in "door mode". The program below demonstrates one method of doing just this. In this case, the program would include two functions, door(), which would carry out all of the door-related activities, and maint(), which would carry out all of the maintenance-related activities. In this simple example, if the command line includes a "-M" or "/M", the program will run in maintenance mode, otherwise it will run in door mode. Also, if it is running in door mode, the program will take the first command-line parameter, if any, as a path to the location of the door information file. #include "opendoor.h" void door(void); void maint(void); int main(int argc, char *argv[]) { int counter; /* Check any command line parameters for /M or -M */ for(counter=1;counter<argc;++counter) { if((argv[counter])[1]=='m' || (argv[counter])[1]=='M') { maint(); /* Then carry out maintenance */ exit(20); /* And exit */ } } /* If there was no -M or /M, then run in door mode */ /* If there are any command-line parameters take the first */ /* as the path to the door information file */ if(argc>1) strncpy(od_control.info_path,argv[1],59); od_init(); /* call the od_init() function */ door(); /* Run the door portion of the program */ od_exit(30,FALSE); /* Shutdown the door */ } =============================================================================== OpenDoors 5.00 Manual End of Page 92 void maint(void) { ... /* Carry out maintenance activities here */ } void door(void) { ... /* Carry out door activities here */ } =============================================================================== OpenDoors 5.00 Manual End of Page 93 OD_INPUT_STR() ------------------------------------------------------------------------------- PURPOSE Inputs a string from the user FORMAT void od_input_str(char *string,int max_len,char minchar, char maxchar); RETURNS N/A DESCRIPTION To perform string input within OpenDoors, one of two functions can be used, od_input_str() and od_edit_str(). The first function, od_input_str(), allows simple line input and editing, and can be used in ASCII, ANSI, AVATAR and RIP modes. The second function, od_edit_str(), allows many formatted input options, advanced line editing, and other features, but requires the use of ANSI, AVATAR or RIP graphics modes. The od_input_str() function allows you to input a string from the user. The string will be permitted to have up to the number of characters specified by the max_len parameter, and all characters must be between the values of the min_char and max_char parameters. This function will wait until the user presses the [Enter] key to finish inputting the string. The first parameter passed to this function should be a pointer to the string where the user's input should be stored. So, if you wanted to store a string of up to 30 characters inputted by the user, you might define this string as follows: char input_string[31]; Notice here than the string must be long enough to hold the thirty characters which can be entered by the user, along with the additional "null" character which is used to indicate the end of a string in C. Hence, the length of the string should always be at least one greater than the total number of characters the user is permitted to enter, passed in the max_len parameter. The second parameter passed to the od_input_str() function should be an integer value indicating the maximum number of characters which can be input by the user. For example, if this parameter had a value of 10, the user would be able to enter a string containing any number of characters up to and including 10 characters. If this parameter had a value of 1, the user would only be able to enter a single character. However, the =============================================================================== OpenDoors 5.00 Manual End of Page 94 user would be able to backspace, change the character, and press [Enter] when they were satisfied with their entry. Note that even if you only ask the od_input_str() function to input a single character, it will still expect a STRING to be passed to it, and will return a string with either zero or one character, followed by a null (string terminator) character. The third and fourth parameters passed to this function allow you to control what characters the user will be permitted to enter as part of the string. For example, you could set the minimum character to the '0' character and the maximum character to the '9' character, permitting the user to only enter numeric characters. On the other hand, you could permit the user to enter all ASCII characters in the range from 32 to 127. The od_input_str() function will permit characters in the range beginning with the character passed as minchar, up to and including the character passed as maxchar. SEE ALSO od_edit_str(), od_get_key(), od_clear_keybuffer() EXAMPLE Below are a number of examples of the use of the od_input_str() function in various applications: - To input a two character number (only digits from 0-9): od_input_str(string,2,'0','9'); - To input a 35 character name (characters from Space to ASCII 127): od_input_str(string,35,32,127); =============================================================================== OpenDoors 5.00 Manual End of Page 95 OD_KERNEL() ------------------------------------------------------------------------------- PURPOSE The OpenDoors Central Control function FORMAT void od_kernel(void); RETURNS N/A DESCRIPTION The od_kernel() function is responsible for many vital OpenDoors tasks, such as monitoring the carrier detect signal, monitoring the amount of time that the user has remaining, updating the status line, responding to sysop hotkeys, and reading characters which are received from the modem. The od_kernel() function is automatically called on a frequent basis by the other OpenDoors functions, so most often you will not need to be concerned with this function. However, in order that OpenDoors can carry out the activities mentioned above with a quick response, it is important that od_kernel(), or some other OpenDoors function be called at least once every second. Thus, if your program will be carrying out some processing, in which it will not be calling any OpenDoors functions for more than a second or so, you should call the od_kernel() function yourself. The example below demonstrates one method of doing just this. Note that if for some reason or other, it is not possible for your program to call the od_kernel() function, or any other OpenDoors functions for a period of several seconds, this will not cause your door to crash or fail in any way. The only problem will be that OpenDoors will not be able to respond to any action, such as the sysop pressing a function key, or the user dropping carrier, until such time as you next call od_kernel(), or some OpenDoors function. Hence, use of the od_kernel() function will improve the quality and response time of your program, but calling it or some OpenDoors function on a regular basis is not absolutely vital. EXAMPLE As mentioned above, if it is possible that several seconds may pass between your program calling any OpenDoors functions, it would be a good idea for you to call the od_kernel() function on a regular basis. Below is an example of a door_sleep() function, which will pause for the specified amount of time, while continually calling the od_kernel() function. This function will thus allow a door program to pause for a given length of time, perhaps after having displayed its title screen, or in order to add special effects to an ANSI animation. In this case, the =============================================================================== OpenDoors 5.00 Manual End of Page 96 program will be able to respond to events such as the sysop pressing function keys, or the user dropping carrier, while it is pausing. void door_sleep(int seconds) { /* Calculate the timer tick to wait until */ long until=(*(long far *)0x46cL)+(18L*(long)seconds); /* Loop until the specified number of seconds have expired */ while(until>*(long far *)0x46cL) { od_kernel(); /* Repeatedly call od_kernel() */ } } =============================================================================== OpenDoors 5.00 Manual End of Page 97 OD_LIST_FILES() ------------------------------------------------------------------------------- PURPOSE Lists files in a particular file area (using FILES.BBS) FORMAT int od_list_files(char *directory); RETURNS TRUE if successful, FALSE if unsuccessful DESCRIPTION This function allows you to display a list of files available for download from a particular file area, as any BBS system would. The file names and descriptions are taken from the FILES.BBS located in the directory pointed to by *directory. Thus, to list the files available for download in C:\BBS\FILES\UPLOADS, simply: od_list_files("C:\\BBS\\FILES\\UPLOADS"); OpenDoors uses a third-generation FILES.BBS format, that is compatible with other FILES.BBS formats, but adds some additional features. Each line in the FILES.BBS file lists a filename, along with it's description. Thus, a typical FILES.BBS file might look as follows: PKZ110.EXE PKZip file compressor, version 1.10 ODOORS40.LZH The newest version of OpenDoors! EZVOTE40.ZIP EZVote user voting door. BID12.ZIP BBS info. door for new BBS users When displayed, OpenDoors will list the size of each file found in the FILES.BBS file beside it's name, if the file is found. If the file does not exist, then a "[OFFLINE]" string is displayed in the file size column. Title lines may also be added to the FILES.BBS, by indenting them one or more columns. Thus, you could have something like: NEWEST UPLOADS ~~~~~~~~~~~~~~ PKZ110.EXE PKZip file compressor, version 1.10 ODOORS40.LZH The newest version of OpenDoors! EZVOTE40.ZIP EZVote user voting door. BID12.ZIP BBS info. door for new BBS users In addition to this standard FILES.BBS format, OpenDoors will also permit wildcards to be used in FILES.BBS filenames (ie FNEWS???.*), or full directory paths to allow files from several different directories to be included in the same files area. =============================================================================== OpenDoors 5.00 Manual End of Page 98 You may alter the colours used to display the various portions of the files list using the od_control variables: od_control.od_list_title_col od_control.od_list_name_col od_control.od_list_size_col od_control.od_list_comment_col od_control.od_list_offline_col which are documented in the OpenDoors control structure section on this manual, which begins on page 145. SEE ALSO od_send_file() =============================================================================== OpenDoors 5.00 Manual End of Page 99 OD_LOG_WRITE() ------------------------------------------------------------------------------- PURPOSE Function to write an entry to the log file FORMAT int od_log_write(char *message); RETURNS TRUE on success, or FALSE on failure DESCRIPTION This function can be used to write entries to the log file. If the logfile has not already been opened when you call this function for the first time, OpenDoors will automatically open the log file at that time. To create an entry in the log file, simply call the od_log_write() function, passing to it the string of the text you wish to write. You should not include any control characters in this string, simply the text that should appear on the line. OpenDoors will automatically format the log file, adding the time information and other control characters. It is recommended that the length of the string passed to od_log_write() not exceed 67 characters, in order that logfile lines will all be less than 80 characters in length. Log file entries do not usually contain periods or other punctuation at the end of the line. Also, log file entries are usually written in the present tense. The first character of the entry is usually upper-case, with all other entries in lower case. Also, since excessive numbers or lengths of log file entries can quickly use a lot of disk space, it is best to think carefully about what events should be recorded in the log file. It is also a good idea to minimize the number of words used in the entry, without being too cryptic. As an example, "User entering options menu" should be used instead of "user entered the options menu." SEE ALSO Page 215. EXAMPLE Calling the od_log_write() function is as simple as follows: od_log_write("Awarding user with 5 minutes more time"); =============================================================================== OpenDoors 5.00 Manual End of Page 100 OD_PAGE() ------------------------------------------------------------------------------- PURPOSE Function to allow user to page the sysop FORMAT void od_page(void); RETURNS N/A DESCRIPTION This function can be called to allow the user to page the sysop. This function will ask the user why they wish to chat with the sysop, and then page the sysop. The sysop will then be free to break into chat at any time. Sysop paging will also be aborted by the user, simply by pressing [Enter] when asked for a reason for chat. When the user pages the sysop, the [Wants-Chat] indicator will begin to flash on the main status line, and the status line will switch to show the user's reason for wanting to chat. Also, the user's total number of pages will be incremented. Depending upon the setting of the od_control.od_okaytopage variable, this function will also optionally check sysop paging hours, and only allow the user to page the sysop during valid paging hours. For information on the variables containing the user's total number of pages, the user's want-chat status, valid sysop paging hours, and the od_control.od_okaytopage variable, see the section on the OpenDoors control structure, which begins on page 145. EXAMPLE For an example of the use of the od_page() function, see the EZVote example door, which is described beginning on page 38. =============================================================================== OpenDoors 5.00 Manual End of Page 101 OD_POPUP_MENU() ------------------------------------------------------------------------------- PURPOSE Creates a popup menu which allows the user to make a selection by pressing a single key, or selecting the item with a highlight bar. After the user has made a selection, the menu may be removed from the screen, restoring the original screen contents "beneath" the window. FORMAT int od_popup_menu(char *title, char *text, int left, int top, int level, unsigned int flags); RETURNS POPUP_ERROR On error (od_control.od_error is set to indicate type of error). POPUP_ESCAPE If user exited menu by pressing [ESCape]. POPUP_LEFT If user exited menu by pressing the left arrow key. POPUP_RIGHT If user exited menu by pressing the right arrow key. Or, a postive integer indicating the menu item that was chosen if a selection was made. DESCRIPTION od_popup_menu() creates a popup window with a menu of choices, for use in ANSI/AVATAR/RIP modes. The user is able to choose an item from the menu by moving the highlighted selection bar with the arrow keys, or by pressing a key associated with a particular menu item. The contents of the menu are defined by the string pointed to by the text parameter. This menu definition string contains each menu option, seperated by a '|' (pipe) character. Keys associated with each menu entry can be defined by proceeding the letter with a '^' (carat) character. For example, the string: "^Save|^Load|E^xit" would produce a menu with three options: Save, Load and Exit. The user would be able to select the Save option by pressing the [S] key, the Load option by pressing the [L] key, and the Exit option by pressing the [X] key. Furthermore, the characters corresponding to each menu item would be displayed in a highlighted color. Menus displayed with od_popup_menu() may optionally have a title, as specified by the title parameter. If this parameter is set to NULL, no title will be displayed. If this parameter is =============================================================================== OpenDoors 5.00 Manual End of Page 102 not NULL, the specified string will be displayed as a title on the window. The left and top parameters specify the left and top locations of the menu window, were 1, 1 is the upper right corner of the screen. The bottom and right corners of the menu are automatically determined by the size and number of menu entries in the menu definition string. The level parameter specifies the menu level, an integer from 0 to 9. Unless you are using the MENU_KEEP flag, this parameter should always be 0. The flags parameter specifies one or more of the following options, joined by the bitwise-OR operator (|). MENU_NORMAL Has no effect. MENU_ALLOW_CANCEL Allow user to exit menu with [ESCape]. MENU_PULLDOWN Allow exit with arrow keys. MENU_KEEP Leave menu active on seleion. MENU_DESTROY Remove a currently active menu. If you are not using any of the other flags, you can use MENU_NORMAL as a place-holder for this parameter. If you sepecify MENU_ALLOW_CANCEL, the user will be able to exit the menu without making a selection by pressing the [ESCape] key. If the user presses [ESCape], od_popup_menu() returns POPUP_ESCAPE. You can use the MENU_PULLDOWN option with od_popup_menu() to implement a set of pulldown menus. In this case, if the user presses the left arrow key or right arrow key while the menu is being displayed, od_popup_menu() returns with POPUP_LEFT or POPUP_RIGHT, allowing you to display a different menu. Normally, od_popup_menu() will remove the menu from the screen as soon as the user makes a selection. However, there may be some cases when you want the menu to continue to be visible after the user makes a selection. For example, you may want some menu options to lead to further sub-menus, or you may wish to display a popup window, and return to this menu after the user has exited from the popup window. If the MENU_KEEP flag is specified, the menu will remain active (on-screen) after the user makes a selection. However, the menu will still be destroyed if the user cancels out of the menu (this will only happen if you have specified MENU_ALLOW_CANCEL), or if the user moves to another menu by pressing the left or right arrow keys (this will only happen if you have specified MENU_PULLDOWN). If MENU_KEEP has been specified, and the user makes a selection, you must eventually either return to the menu, or destroy it by calling MENU_DESTROY. If you want to return to the menu, simply call od_popup_menu() again with the same level value that was used to originally create the menu. The user will now be able to make another selection from the menu, and od_popup_menu() will once again return that selection to you. If you want to destory =============================================================================== OpenDoors 5.00 Manual End of Page 103 the menu, simply call od_popup_menu() with the MENU_DESTROY flag set, and the same level value that was used to create the original menu. If you wish to create another popup menu while the first one is still active, simplly call od_popup_menu() again, this time with a different level value. The colors used by the od_popup_menu() function are set by the following OpenDoors control structure settings: char od_control.od_menu_title_col; char od_control.od_menu_border_col; char od_control.od_menu_text_col; char od_control.od_menu_key_col; char od_control.od_menu_highlight_col; char od_control.od_menu_highkey_col; SEE ALSO od_window_create(), od_window_remove(), od_draw_box(), od_hotkey_menu() =============================================================================== OpenDoors 5.00 Manual End of Page 104 OD_PRINTF() ------------------------------------------------------------------------------- PURPOSE Performs formatted output (remote & local), with the ability to change display colours. FORMAT void od_printf(char *format,...); RETURNS N/A DESCRIPTION This is one of two OpenDoors function which allows you to display a string of characters, the other being the od_disp_str() function. For a complete comparison of the various OpenDoors display function, see the description of the od_disp_str() function, on page 64. Like the od_disp_str() function, the od_printf() function will display its output both on the local screen, and on the remote user's screen (if the door is not operating in local mode). However, the od_printf() function also allows for formatted output, just as the printf() function does. In addition to providing all of the features of the normal C printf() function, the od_printf() function allows you to include codes to change the colour of the display of text. This unique feature allows you to display multi-coloured text, without having to use chains of alternating od_disp_str() and od_set_colour() calls. As with the printf() function, the od_printf() function accepts one or more parameters, the first parameter being the format string to be displayed, and the additional parameters being data to be displayed within the string. The OpenDoors od_printf() function recognizes all of the control characters and options recognized by the normal printf() function. For example, to display the amount of time that a user has left online, the following line would be a valid use of the od_printf() function: od_printf("Time Left:%d\n\r", od_control.user_timelimit); Note that a full discussion of the printf() function is beyond the scope of this manual. For more information on using printf(), please see your Turbo C(++) / Borland C++ manuals. In addition to the normal control sequences, such as "%s", "%d", or "%12.12s", the od_printf() function also allows you to include special colour-setting codes within the format string. These colour code sequences BEGIN and END with a delimiter character, which is used to indicate that the sequence is a =============================================================================== OpenDoors 5.00 Manual End of Page 105 colour setting. Consider, for example, the following line of code, which displays text in various colours: od_printf("`blue`Blue `green`Green `red`Red \n\r"); In this case (assuming of course that a colour monitor is being used) the word "Blue" will be displayed in the colour blue, the word "Green" will be displayed in the colour green, and the word "Red" will be displayed in the colour red. In this case, the sequence `blue` sets the display colour to dark blue on black. Here, the back-quote (`) is the delimiter character which indicates the beginning and end of the colour sequence. Be sure not to confuse the back-quote character (`) with the normal forward quote ('). THIS IS THE MOST COMMON DIFFICULTY EXPERIENCED WITH THE OD_PRINTF() FUNCTION. The text between the back-quote characters indicates the colour that should be set. This text can include the name of the foreground colour, the name of the background colour, the "bright" keyword and the "flashing" keyword. The first colour mentioned is taken to be the foreground colour, and the second the background colour. Case is not sensitive, additional words can be included for legibility. Thus: `bright white cyan` is equivalent to: `Bright white on a cyan background`. The "bright" keyword indicates that the foreground colour should be displayed in high intensity, and the "flashing" keyword indicates that the text should be flashing. If no background is specified, the background colour defaults to black. If no foreground or background colours are specified, the colour defaults to white on black. The od_printf() function will automatically determine whether the user has ANSI, AVATAR or RIP graphics enabled, and will send the appropriate colour codes to change the colour of displayed text. If the user does not have either ANSI or AVATAR graphics modes turned on, then the od_printf() function will not send any colour codes. Thus, a door program using colour codes would work just as well when ANSI/AVATAR/RIP graphics are not available, except that all text will appear in the same colour. You may prefer to set colours by using the od_set_colour() or od_set_attrib() functions, instead of using these cryptic colour codes imbedded in od_printf() functions. In some cases, however, it will be much more advantageous to place the colour codes within your od_printf() strings. As a case in point, consider the single od_printf() statement in the example, above. To accomplish the same result using the od_disp_str() and od_set_colour() functions, you would have to use the following SIX function calls: =============================================================================== OpenDoors 5.00 Manual End of Page 106 od_set_colour(D_BLUE,D_BLACK); od_disp_str("Blue "); od_set_colour(D_GREEN,D_BLACK); od_disp_str("Green "); od_set_colour(D_RED,D_BLACK); od_disp_str("Red \n\r"); While this method MAY be easier understand, it certainly requires many more line of code to accomplish. However, either method will work, and the choice is up to you as to which method you prefer. Keep in mind, however, that if the colour to be set is stored in a variable, instead of always being the same colour, you must use either the od_set_colour() or od_set_attrib() function to set the display colour. While the back-quote (`) character is normally used to delimit a colour sequence in the od_printf() function, you may wish to be able to print a back-quote character using the od_printf() function. In this case, you may configure OpenDoors to use a different character to represent colour code sequences. To do this, simply use the od_control.od_colour_delimiter variable, which is described in the OpenDoors control structure section, beginning on page 145. For example, if you wished to use the tilde (~) character instead of the back-quote character to change colours, simply place the following line within your program, at some point after having called od_init() or some OpenDoors function: od_control.od_colour_delimiter='~'; Also, you may disable the colour code interpretation within the od_printf() function altogether, by setting the od_control.od_colour_delimiter variable to 0. Note that the od_printf() function interprets the colour codes AFTER parsing the other control sequences, such as "%d" or "%s". Thus, if you used the command: od_printf("%s",string); Any colour codes contained in the string "string" would also be interpreted. If you did not wish to have any colour code characters which might be contained in the string "string" treated as such, you could again disable od_printf()'s colour code interpretation, by setting the od_control.od_colour_char variable to 0. Note that the string to be displayed by od_printf() should not exceed 511 characters in size, including the size of color sequences and expanded % fields. SEE ALSO od_disp_str(), od_disp(), od_putch(), od_repeat(), od_disp_emu() =============================================================================== OpenDoors 5.00 Manual End of Page 107 EXAMPLE Below is a simple example of a user statistics door program, which displays various pieces of information to the user, by using the od_printf() function. Notice the use of colour code sequences in order to display the titles in a different colour from the information fields. Note that since the information available to this door will depend on the BBS system under which it is running, not all of the information displayed by this door will be available under all BBS systems. For a description of what information is available under what BBS systems, see the OpenDoors control structure portion of this manual, which begins on page 145. #include "opendoor.h" int main(int argc,char *argv[]) { od_init(); /* Begin OpenDoors program */ od_printf("`bright white` YOUR STATISTICS\n\r"); /* Display title */ od_printf("---------------\n\r\n\r"); /* Display statistics */ od_printf("`red`NAME : `blue`%s\n\r",od_control.user_logintime); od_printf("`red`LOCATION : `blue`%s\n\r",od_control.user_location); od_printf("`red`PHONE NUMBER : `blue`%s\n\r",od_control.user_homephone); od_printf("`red`LAST CALL : `blue`%s\n\r",od_control.user_lastdate); od_printf("`red`NUMBER OF CALLS : `blue`%u\n\r",od_control.user_numcalls); od_printf("`red`NUMBER OF PAGES : `blue`%u\n\r",od_control.user_numpages); od_printf("`red`REMAINING TIME : `blue`%d\n\r",od_control.user_timelimit); od_printf("`red`# OF DOWNLOADS : `blue`%u\n\r",od_control.user_downloads); od_printf("`red`# OF UPLOADS : `blue`%u\n\r",od_control.user_uploads); od_printf("`red`KBYTES DL TODAY : `blue`%u\n\r",od_control.user_todayk); /* Ask user to press [Enter] */ od_printf("`bright green on green`Press [Enter] to return to BBS...\n\r"); while(od_get_key(TRUE)!=13); /* Wait for user to press [Enter] */ od_exit(20,FALSE); /* Return to BBS */ } HELPFUL This section demonstrates use of the od_printf() colour HINT sequences imbedded directly in the printf() format string, such as: od_printf("Hello `bright green` there!"); However, there are also other ways that you can take advantage of this feature. For example, the C programming language =============================================================================== OpenDoors 5.00 Manual End of Page 108 concatenates string constants that are separated only by white space or carriage returns. For instance, "Hello " "`bright green`" " there!" is equivalent to: "Hello `bright green` there!" For this reason, you can create macros for common colour sequences in your program, such as: #define HIGHLIGHT "`bright green`" You can then use such constants when calling the od_printf() function, as follows: od_printf("Hello " HIGHLIGHT " there!"); You may find this method of setting the display colour to be easier to read, and more easily configurable than including the colour sequence directly in the format string. Below another use of the colour sequences is describe, which allows the colours used by od_printf() not be "hard-wired". Since colour control sequences are evaluated by od_printf() after it evaluates all format sequences (such as "%d"). For this reason, it is possible to change the display colour using a string variable, instead of using a fixed colour in the string. For example, if you program had the variable: char highlight[40]; which was set at some point to be equal to: "`bright green`" you would be able to use od_printf() as follows: od_printf("Hello %s there!", highlight); The display colour would then be changed at the location where the "%s" appears in the od_printf() format string. The advantage of using this method to change display colours is that unlike other methods, the value of the highlight variable can be changed. This could be used, for example, to allow the sysop to configure the colours they wish your door to use. You would only need to change the value of the highlight variable in order to change the colour set by od_printf(). =============================================================================== OpenDoors 5.00 Manual End of Page 109 OD_PUTCH() ------------------------------------------------------------------------------- PURPOSE Function to display a single character. FORMAT void od_putch(int character); RETURNS N/A DESCRIPTION This function performs a similar function to the other OpenDoors display functions. For information on the uses of the various OpenDoors display functions, see the description of the od_disp_str() function, on page 64. This function is most similar to the od_disp() and od_disp_str() functions, except that it only displays a single character at a time. This function will display the character passed to it at the cursor position in the output window, and then advance the cursor to the next display position. If OpenDoors is not operating in local mode, the character will also be sent to the modem, and thus displayed on the user's screen in the same manner that it is displayed on the local screen. If ANSI, AVATAR or RIP graphics mode is activated the character will be displayed in the current colour. SEE ALSO od_disp_str(), od_disp(), od_printf(), od_repeat(), od_disp_emu() EXAMPLE Below is an example of the use of the od_putch() function. This example is a function which you could use in place of the od_get_key() function. This function inputs a single character from the keyboard, just as the od_get_key() function does. However, if the character entered is a printable character, the function will also echo the character to the local screen, using the od_putch() function. This is helpful for a user to know what key they have pressed within your door. char get_key_with_echo(int wait) { char pressed=od_get_key(wait); /* Get key from user */ if(pressed>=32 && pressed<=126) /* If key is printable */ { od_putch(pressed); /* Display the character */ } =============================================================================== OpenDoors 5.00 Manual End of Page 110 return(pressed); /* Return key pressed by user */ } For a further example of the user of the od_putch() function, see the example accompanying the od_repeat() function, which is described on page 114. =============================================================================== OpenDoors 5.00 Manual End of Page 111 OD_PUTTEXT() ------------------------------------------------------------------------------- PURPOSE Displays a rectangular region of text and colour information, as previously stored using od_gettext() FORMAT int od_puttext(int left, int top, int right, int bottom, void *block); RETURNS TRUE on success FALSE on failure DESCRIPTION This function "pastes" a rectangular block of text and colour information that has been previously retrieved using od_gettext(). The block is placed at the screen location indicated by the variables "left", "top", "right" and "bottom", where "left" and "right" are column numbers from 1 - 80, and "top" and "bottom" are row numbers from 1 - 23. The length and width of the rectangle specified by "left", "top", "right" and "bottom" must be the same as the length and width of the rectangle passed to od_gettext() when storing the block of text. This function attempts to display the pasted block as quickly as possible, only transmitting information on portions of the block that are different than the original screen contents. When this function returns, it leaves the cursor at its original position, and the display colour at its original setting. This function requires ANSI or AVATAR graphics mode. The control structure variable od_control.od_full_put may be set to TRUE to force od_puttext() to always send all characters in the block to be displayed, instead of only displaying the portions of the block that differ from the original screen contents. If you wish to save and restore the entire screen, you may use od_save_screen() and od_restore_screen(), which work in all display modes. You may also use the od_puttext() to display a rectangular block of text that you generate manually, instead of retrieving using od_gettext(). To do this, you pass an array which contains the text and colour information for the rectangular area to be painted, in the "block" parameter. The array passed to od_puttext() contains a two-byte sequence of information for each character in the rectangle. The first byte contains the ASCII code of the character to be displayed. The second byte =============================================================================== OpenDoors 5.00 Manual End of Page 112 contains the colour attribute value of the character, in the same format as used by the od_set_attrib() function (described on page 125). These two byte sequences are stored in the order in which English is written; the array begins with the two byte sequences for all of the characters on the first line, from left to right, followed by the characters for the second line, and so on. The length of each line must be exactly equal to the width of the rectangular region to be painted. If od_puttext() fails for any reason, a value of FALSE is returned, and the od_control.od_error variable is set to indicate the reason for the failure. For more information on the od_control.od_error variable, see page 182. SEE ALSO od_gettext(), od_save_screen(), od_restore_screen(), od_scroll(), od_window_create(), od_window_remove() EXAMPLE For an example of the user of the od_puttext() function, see the example that accompanies the description of the od_gettext() function. The od_gettext() function is documented on page 88. =============================================================================== OpenDoors 5.00 Manual End of Page 113 OD_REPEAT() ------------------------------------------------------------------------------- PURPOSE Repeatedly display the specified character any number of times, using special graphics codes for greater speed, if possible. FORMAT void od_repeat(char value,unsigned char times); RETURNS N/A DESCRIPTION This display function will repeatedly display the character "value", "times" times. For a complete breakdown of the various OpenDoors display functions, see the description of the od_disp_str() function, located on page 64. The advantage of using this function to display a series of identical characters is that this function will use special graphics-mode control sequences to display the repeated character very efficiently, if the required graphics mode is available. For example, in AVATAR mode, this function can display an entire line of one character, by sending a control sequence to the modem that is only three characters long. If graphics mode is not turned on, then the od_disp_str() function will simply send the specified character the appropriate number of times. As with the other display functions, the output of this function is sent to both the local and remote screens. SEE ALSO od_putch(), od_disp_str(), od_disp(), od_printf(), od_disp_emu() EXAMPLE The example function below demonstrates the use of the od_repeat() function in drawing a window (a square box) on the screen. This function is essentially a simplified version of the od_draw_box() function, which is described on page 66. Unlike this function, the od_draw_box() function allows the customization of the characters used to draw the box's boarder, and if possible uses additional AVATAR graphics codes to display the window even faster than this function does. Thus, the function below is really provided for demonstration purposes only. This function accepts four parameters, which indicate the location of the upper left and lower right corners of the window to be displayed. The function then displays the window with the current colour attribute settings. Since this function uses the od_repeat() function, if AVATAR graphics are available, it can =============================================================================== OpenDoors 5.00 Manual End of Page 114 display the entire window in a fraction of a second, even if it is displaying a window the size of the entire screen at slow baud rates. Note that this window display function requires that the user has ANSI, AVATAR or RIP graphics mode enabled. void draw_window(char left, char top, char right, char bottom) { char line_counter; /* Number of current line being drawn */ char between_size=(right-left)-1; /* X size of window */ od_set_cursor(top,left); /* move to top corner */ od_putch(218); /* display corner character */ od_repeat(196,between_size); /* display top line */ od_putch(191); /* display corner character */ /* loop through middle lines of window */ for(line_counter=top+1;line_counter<bottom;++line_counter) { od_set_cursor(line_counter,left); /* move to line start */ od_putch(179); /* display left line char */ od_repeat(' ',between_size); /* display blank area */ od_putch(179); /* display right line char */ } od_set_cursor(bottom,left); /* move to bottom corner */ od_putch(192); /* display corner character */ od_repeat(196,between_size); /* display bottom line */ od_putch(217); /* display corner character */ } =============================================================================== OpenDoors 5.00 Manual End of Page 115 OD_RESTORE_SCREEN() ------------------------------------------------------------------------------- PURPOSE Restores the screen contents as previous saved using the od_save_screen() function. This function can be used in any display mode. FORMAT int od_restore_screen(void *buffer); RETURNS TRUE on success FALSE on failure DESCRIPTION This function restores the entire contents of the screen, along with the current cursor position and display colour, which was previously stored using the od_save_screen() function. Unlike the od_get_text() and od_put_text() functions, the od_save_screen() and od_restore_screen() functions will work in all display modes (ASCII, ANSI, AVATAR and RIP). The "buffer" parameter must point to the buffer previously passed to od_save_screen(). Note that the od_save_screen() and od_restore_screen() functions save the stored information in different formats than the od_getttext() and od_puttext() functions. For this reason, you cannot save the screen contents with od_gettext() and restore them with od_restore_screen(), or visa-versa. If this function fails for any reason, a value of FALSE is returned, and the od_control.od_error variable is set to indicate the reason for the failure. For more information on the od_control.od_error variable, see page 182. SEE ALSO od_save_screen(), od_gettext(), od_puttext(), od_clr_scr() EXAMPLE For an example of how to use the od_restore_screen() function, see the example which accompanies the od_save_screen() function, on page 117. =============================================================================== OpenDoors 5.00 Manual End of Page 116 OD_SAVE_SCREEN() ------------------------------------------------------------------------------- PURPOSE Saves the contents of the screen, to later be restored using od_restore_screen(). Can be used in any display mode. FORMAT int od_save_screen(void *buffer); RETURNS TRUE on success FALSE on failure DESCRIPTION This function saves the entire contents of the screen, along with the current cursor position and display colour, to be later restored using the od_restore_screen() function. Unlike the od_get_text() and od_put_text() functions, the od_save_screen() and od_restore_screen() functions will work in all display modes (ASCII, ANSI, AVATAR and RIP). The "buffer" parameter should point to a buffer where the current screen information is to be stored. This buffer must be at least 4004 bytes in size. Note that the od_save_screen() and od_restore_screen() functions save the stored screen information in different formats than the od_getttext() and od_puttext() functions. For this reason, you cannot save the screen contents with od_save_screen() and restore them with od_puttext(), or visa-versa. Also, note that when used in RIP graphics mode, this function only saves and restores textual information, and not bit-mapped graphical information. If this function fails for any reason, a value of FALSE is returned, and the od_control.od_error variable is set to indicate the reason for the failure. For more information on the od_control.od_error variable, see page 182. SEE ALSO od_restore_screen(), od_gettext(), od_puttext(), od_clr_scr() EXAMPLE One case where you might wish to save and restore the contents of the screen is when sysop chat mode is activated. This can be accomplished by using the od_control.od_cbefore_chat and od_control.od_cafter_chat variables. The following example causes the screen contents to be saved and the entire screen cleared, prior to entering sysop chat mode when the sysop presses the "chat key". When the sysop ends chat mode, the =============================================================================== OpenDoors 5.00 Manual End of Page 117 user's original screen is restored, and the user will be able to continue working in the door as though nothing had happened. Code to perform screen saving and restoring: /* Function prototypes */ void before_chat_function(void); void after_chat_function(void); /* Buffer to hold contents of screen prior to chat */ char before_chat_buffer[4004]; /* Variable to store whether screen save was successful */ char before_chat_saved = FALSE; /* Function which is called prior to entering chat mode */ void before_chat_function(void) { /* Store current screen contents */ before_chat_saved = od_save_screen(before_chat_buffer); /* Present a blank screen for chat mode */ od_clr_scr(); } /* Function which is called after exiting chat mode */ void after_chat_function(void) { /* If screen was successfully saved prior to chat */ if(before_chat_saved) { /* Restore original screen contents */ od_restore_screen(before_chat_buffer); } } Code included in main() function to enable screen saving and restoring code: od_control.od_cbefore_chat = before_chat_function; od_control.od_cafter_chat = after_chat_function; =============================================================================== OpenDoors 5.00 Manual End of Page 118 OD_SCROLL() ------------------------------------------------------------------------------- PURPOSE Scrolls any rectangular area of the screen a specified number of lines upwards or downwards. Requires ANSI/AVATAR/RIP graphics mode to be active. FORMAT int od_scroll(int left, int top, int right, int bottom, int distance, unsigned int flags); RETURNS TRUE on success FALSE on FAILURE DESCRIPTION This function scrolls a rectangular area of the screen described by the parameters "left", "top", "right" and "bottom". The parameters "left" and "right" are column numbers from 1 - 80, and the parameters "top" and "bottom" are row numbers from 1 - 23. The parameter "distance" indicates the direction and number of lines to scroll the text in the specified area. Positive values denote moving the text upwards, and negative values denote moving the text downwards. Hence, a "distance" of 1 would cause the text in the specified area to be scrolled upwards one line, with the top line disappearing, and a blank line being created at the bottom of this area. A "distance" of -2 would cause the text in the specified are to be scrolled downwards two lines. The last parameter to od_scroll(), "flags" is not currently used by OpenDoors. However, to preserve compatibility with future versions of OpenDoors, this should always be 0. The new lines created by scrolling text will appear in the current colour. When this function returns, it leaves the cursor at its original position, and the display colour at its original setting. This function requires ANSI or AVATAR modes. If ANSI mode is active, this function is equivalent to calling od_gettext(), od_puttext(), and then sending addition codes to the modem clear the newly created lines. In ANSI mode, scrolling can be accomplished more quickly if the area to be scrolled is equal in width to the entire screen. This is because the clearing of newly created lines is done by sending a simple control sequence, instead of a line of space characters. If AVATAR mode is active, scrolling of the window is accomplished by sending a single 6-byte control sequence. =============================================================================== OpenDoors 5.00 Manual End of Page 119 If the od_scroll() function fails for any reason, a value of FALSE is returned, and the od_control.od_error variable is set to indicate the reason for the failure. For more information on the od_control.od_error variable, see page 182. SEE ALSO od_gettext(), od_puttext(), od_window_create(), od_window_remove() EXAMPLE For an example of a program which uses the od_scroll() function, see the ex_chat.c example door that is included in your OpenDoors package. The ex_chat.c example door is described on page of 38 this manual. =============================================================================== OpenDoors 5.00 Manual End of Page 120 OD_SEND_FILE() ------------------------------------------------------------------------------- PURPOSE Sends an ASCII/ANSI/AVATAR/RIP file from disk, using terminal emulation. Also interprets RA/QBBS style information control codes. FORMAT int od_send_file(char *filename); RETURNS TRUE if the file was successfully sent FALSE if OpenDoors was unable to send the file DESCRIPTION: This powerful function will display any ASCII, ANSI, AVATAR or RIP file. The od_send_file() function can be used to display existing BBS text files, such as a "logoff screen", before your door hangs up on the user. You can also make use of the od_send_file() function to build many of your door screens as external files. This will allow you to easily create these screens in an ANSI editor program, such as "TheDraw". It will could also optionally allow sysops to customize your door for use on their own BBS. The od_send_file() function is called with the full path and filename of the file you wish to have displayed. Thus, if you wished to send the ANSI file MAINMENU.SCR, you would simply call: od_send_file("MAINMENU.SCR"); In many cases, instead of having just one file that you want displayed in particular, you will have several different files, and will want a different one displayed according to the user's graphics mode. For example, you might have the four files, MAINMENU.ASC, MAINMENU.ANS, MAINMENU.AVT and MAINMENU.RIP; the .ASC file containing no special control codes, the .ANS file containing ANSI control codes, the .AVT file containing AVATAR control codes, and the .RIP file containing RIP graphics control codes. In this case, you can have the od_send_file() function automatically select the appropriate file according to the user's current display mode, by omitting the extension altogether. Thus, a call to: od_send_file("MAINMENU"); would cause OpenDoors to automatically send the appropriate file, according to the user's graphics mode settings. When the od_send_file() function is used in this "automatic mode" (where =============================================================================== OpenDoors 5.00 Manual End of Page 121 you do not specify a filename extension), it will look for one of the four filename extensions listed below. +----------------------------------------------------------+ | Extension| File type | +----------+-----------------------------------------------| | .ASC | Does not require any graphics mode to display | | .ANS | Requires ANSI graphics mode to display | | .AVT | Requires AVATAR graphics mode to display | | .RIP | Requires RIP graphics mode to be displayed | +----------------------------------------------------------+ If the user has RIP graphics enabled, od_send_file() will first search for the .RIP file. If no file exists with the specified filename and a .RIP extension, od_send_file() will then search for .AVT, then .ANS, and if not found .ASC. If the user has only ANSI graphics enabled, od_send_file() will attempt first to display the .ANS file, and if not found will search for .ASC. In the case that the user is using plain-ASCII mode, this function will attempt only to display the .ASC file. When displaying a .RIP file to the remote system, OpenDoors will attempt to locate and display a corresponding .AVT/.ANS/.ASC file on the local system. If no such file can be found, a window will be displayed, indicating the name of the .RIP file that is being sent to the remote system. When a .RIP file is being displayed, page pausing is disabled. When displaying .AVT/.ANS/.ASC files, od_send_file() will send any ANSI or AVATAR codes in the file directly to the remote terminal, and interpret them to display on the local screen (regardless of the actual filename extension). This interpretation is accomplished by OpenDoor's built in terminal emulator. The terminal emulator fully supports all ANSI and AVATAR level 0 and level 0+ control codes. The terminal emulator will also translate Apex/Remote Access/QuickBBS style control codes. The control codes supported by OpenDoors are listed in the chart on the following pages. When these control codes are inserted into the file, OpenDoors will replace them with various pieces of user or system information. The interpretation of these control codes can be disabled using the od_control.od_no_ra_codes variable. +-----------------------------------------------------+ | CONTROL | ASCII | | | CODE | VALUE | DESCRIPTION | +---------+-------+-----------------------------------| | ^FA | 06,65 | Displays the user's full name | | ^FB | 06,66 | Location the user is calling from | | ^FC | 06,67 | Displays the user's password | | ^FD | 06,68 | Business/data phone number | | ^FE | 06,69 | Home/voice phone number | =============================================================================== OpenDoors 5.00 Manual End of Page 122 | ^FF | 06,70 | Date of the user's last call | | ^FG | 06,71 | Time of day of the last call | | ^FH | 06,72 | The user's `A' flags settings | | ^FI | 06,73 | The user's `B' flags settings | | ^FJ | 06,74 | The user's `C' flags settings | | ^FK | 06,75 | The user's `D' flags settings | | ^FL | 06,76 | User's remaining netmail credit | | ^FM | 06,77 | Number of messages posted by user | | ^FN | 06,78 | Last read message number by user | | ^FO | 06,79 | Displays security level of user | | ^FP | 06,80 | Number of times user has called | | ^FQ | 06,81 | Total # of uploads by user | | ^FR | 06,82 | Total KBytes uploaded by user | | ^FS | 06,83 | Total # of downloads by user | | ^FT | 06,84 | Total Kbytes downloaded by user | | ^FU | 06,85 | # of minute user has used today | | ^FV | 06,86 | User's screen length setting | | ^FW | 06,87 | User's first name only | | ^FX | 06,88 | User's ANSI setting | | ^FY | 06,89 | User's "continue?" prompt setting | | ^FZ | 06,90 | Does user have screen clearing on | | ^F0 | 06,48 | User's Full-screen editor setting | | ^F1 | 06,49 | User's Quiet mode setting | | ^F2 | 06,50 | User's hot-keys setting | | ^F3 | 06,51 | Displays the user's alias | | ^F4 | 06,52 | The date of the User's first call | | ^F5 | 06,53 | The user's date of birth | | ^F6 | 06,54 | User's subscription expiry date | | ^F7 | 06,55 | Number of days until expiry | | ^F8 | 06,56 | User's AVATAR setting | | ^F9 | 06,57 | The user's upload:download ratio | | ^F: | 06,58 | User's Upload K:download K ratio | +-----------------------------------------------------+ +-----------------------------------------------------+ | CONTROL | ASCII | | | CODE | VALUE | DESCRIPTION | +---------+-------+-----------------------------------| | ^F; | 06,59 | Full-screen message reader | | ^KA | 11,65 | Total # of calls BBS has received | | ^KB | 11,66 | Name of the last caller to BBS | | ^KC | 11,67 | Total # of active messages on BBS | | ^KD | 11,68 | Displays # of the first message | | ^KE | 11,69 | Displays # of the last message | | ^KF | 11,70 | # of times user has paged sysop | | ^KG | 11,71 | Full name of the current weekday | | ^KH | 11,72 | Displays total number of users | | ^KI | 11,73 | Displays the current time | | ^KJ | 11,74 | Displays the current date | | ^KK | 11,75 | Minutes the user has been online | | ^KL | 11,76 | Seconds the user has been online | =============================================================================== OpenDoors 5.00 Manual End of Page 123 | ^KM | 11,77 | Minutes the user has used today | | ^KN | 11,78 | Seconds the user has used today | | ^KO | 11,79 | Minutes remaining for user today | | ^KP | 11,80 | Seconds remaining for user today | | ^KQ | 11,81 | The user's daily time limit | | ^KR | 11,82 | Displays the current baud rate | | ^KS | 11,83 | The current weekday in short-form | | ^KT | 11,84 | The user's daily download limit | | ^KU | 11,85 | # of minutes until the next event | | ^KV | 11,86 | Time of the next system event | | ^KW | 11,87 | # of node user is currently on | | ^KX | 11,88 | Disconnects the user | +-----------------------------------------------------+ SEE ALSO od_disp_emu(), od_list_files(), od_hotkey_menu() EXAMPLE For an example of the use of the od_send_file() function in displaying a custom door menu, see the EZVote example door, which is described beginning on page 38. =============================================================================== OpenDoors 5.00 Manual End of Page 124 OD_SET_ATTRIB() ------------------------------------------------------------------------------- PURPOSE Function to change the text colour in ANSI or AVATAR mode, using a single IBM-PC colour attribute value. FORMAT void od_set_attrib(int colour); RETURNS N/A DESCRIPTION od_set_attrib() is one of two functions which change the colour of the currently displayed text. This function allows you to set the text colour using a single IBM-PC style colour attribute. On the other hand, the od_set_colour() function allows you to set the display colour by specifying a foreground and background text colour. Generally speaking, which of these two functions you use will be only a matter of personal preference. You will, however, most likely find it more convenient to use the od_set_colour() function for changing display colour. However the od_set_attrib() offers the advantage of allowing you to manipulate the colour to be displayed as a single value, instead of two separate values. This could be convenient, for example, when displaying text in a user configured colour. Using a single byte to represent the colour will likely be easier than using two. An alternative method of setting the colour of displayed text is to include the colour codes within a string displayed by the od_printf() function. The benefits of doing this, along with instructions on how to do this, are described in the section on the od_printf() function, which begins on page 105. This function will only have an effect if the user has ANSI, AVATAR or RIP modes enabled. As a result, you can use this function within your door program, and have your text automatically displayed in multiple colours if graphics mode is available, and displayed without colours if graphics mode is not available. Note that the colour to be set is passed to this function as an IBM-style screen attribute. Hence, you can set the colour of text to be displayed by a single hexidecimal value, encoded as follows: +------------- Background colour | 0x7f | +------------ Foreground colour =============================================================================== OpenDoors 5.00 Manual End of Page 125 Where the left digit (most significant nibble) of the hexidecimal number represents the background colour, and the right digit (least significant nibble) represents the foreground colour. Each of the possible colours, along with their corresponding hexidecimal values, are listed in the charts, below. +-----------------------+ +--------------------------+ | Foreground colours | | Background | Flashing | +-----------------------| +---------------+----------| | 0 | Black | | 0 | Black | Off | | 1 | Blue | | 1 | Blue | Off | | 2 | Green | | 2 | Green | Off | | 3 | Cyan | | 3 | Cyan | Off | | 4 | Red | | 4 | Red | Off | | 5 | Magenta | | 5 | Magenta | Off | | 6 | Brown | | 6 | Brown | Off | | 7 | White (grey) | | 7 | White | Off | | 8 | Bright Black | | 8 | Black | On | | 9 | Bright Blue | | 9 | Blue | On | | a | Bright Green | | a | Green | On | | b | Bright Cyan | | b | Cyan | On | | c | Bright Red | | c | Red | On | | d | Bright Magenta | | d | Magenta | On | | e | Yellow | | e | Brown | On | | f | White (bright) | | f | White | On | +-----------------------+ +--------------------------+ Hence, od_set_attrib(0x0e) would set the display colour to yellow on a black background, and od_set_attrib(0x70) would set the display colour to black on a while background. SEE ALSO od_set_colour(), od_disp_emu(), od_clr_scr(), od_clr_line(), od_set_cursor() EXAMPLE At times, you may wish to allow the user to select the colour of text they wish to have displayed, perhaps to configure your door for the ideal colours to be displayed on their system. To demonstrate the use of the od_set_attrib() function, we show another function, which shows the user all 256 possible colours that can be displayed, and allows the user to choose which colour they prefer. The function will then return the colour attribute value of the user's chosen colour, which can later be passed to od_set_attrib() to set the displayed text colour to the colour which was chosen by the user. unsigned char choose_colour(void) { register unsigned char counter; /* for displaying colours */ char string[4]; /* string input by user */ =============================================================================== OpenDoors 5.00 Manual End of Page 126 od_set_attrib(0x07); /* display title */ od_disp_str("Available colours:\n\r\n\r"); for(counter=0;counter<=255;) /* loop through all colours */ { od_set_attrib(counter); /* set appropriate colour */ od_printf("%03.3u",counter); /* display colour's number */ if(((++counter)%16)==0) /* after every 16 colours ... */ { od_set_attrib(0x07); /* ... reset display colour ... */ od_disp_str("\n\r"); /* ... and start a new line */ } } od_set_attrib(0x07); /* Allow user to choose colour */ od_disp_str("Which colour do you prefer : "); od_input_str(string,3,'0','9'); return(atoi(string)); /* Return chosen colour */ } =============================================================================== OpenDoors 5.00 Manual End of Page 127 OD_SET_COLOUR() ------------------------------------------------------------------------------- PURPOSE Function to change the current display colour in ANSI, AVATAR or RIP modes, using foreground and background colour values. FORMAT void od_set_colour(int foreground, int background); RETURNS N/A DESCRIPTION od_set_colour() is one of two functions which change the colour of the currently displayed text. This function allows you to set the text colour using separate foreground an background text colours, whereas od_set_attrib() allows you to set the text colour using a single IBM-PC style colour attribute. Generally speaking, which of these two functions you use is only a matter of personal preference. An alternative method of setting the colour of displayed text is to include the colour codes within a string displayed by the od_printf() function. The benefits of doing this, along with instructions on how to do this, are described in the section on the od_printf() function, which begins on page 105. This function will only have an effect if the user has ANSI, AVATAR or RIP mode turned on. As a result, you can use this function within your door program, and have your text automatically displayed in multiple colours if graphics mode is available, and displayed without colours if graphics mode is not available. The od_set_colour() function accepts two parameters, the first parameter being the foreground colour to be used in displaying text, and the second parameter being the background colour to be used in displaying text. For example, od_set_colour(L_WHITE,D_BLACK); would set the current colour to Light White on Dark Black. The foreground and background text colours can be any one of the colour values listed on the following page. =============================================================================== OpenDoors 5.00 Manual End of Page 128 +-------------------+-----------+ | Foreground Colour | Value | +-------------------+-----------+ | Dark Black | D_BLACK | | Dark Blue | D_BLUE | | Dark Green | D_GREEN | | Dark Cyan | D_CYAN | | Dark Red | D_RED | | Dark Magenta | D_MAGENTA | | Dark Brown | D_BROWN | | Grey (Dark White) | D_GREY | | Light Black (Grey)| L_BLACK | | Light Blue | L_BLUE | | Light Green | L_GREEN | | Light Cyan | L_CYAN | | Light Red | L_RED | | Light Magenta | L_MAGENTA | | Yellow | L_YELLOW | | White | L_WHITE | +-------------------+-----------+ +-------------------+-----------+ | Background Colour | Value | +-------------------+-----------+ | Black | D_BLACK | | Blue | D_BLUE | | Green | D_GREEN | | Cyan | D_CYAN | | Red | D_RED | | Magenta | D_MAGENTA | | Brown | D_BROWN | | Grey | D_GREY | | Blinking Black | B_BLACK | | Blinking Blue | B_BLUE | | Blinking Green | B_GREEN | | Blinking Cyan | B_CYAN | | Blinking Red | B_RED | | Blinking Magenta | B_MAGENTA | | Blinking Brown | B_BROWN | | Blinking Grey | B_WHITE | +-------------------+-----------+ SEE ALSO od_set_attrib(), od_disp_emu(), od_clr_scr(), od_clr_line(), od_set_cursor() EXAMPLE As an example of using the od_set_colour() function to set the colour of displayed text, we show a pair of two functions. These functions will allow a program to set the foreground OR background colour of text, without setting the other. In contrast, the od_set_colour() function sets both the foreground =============================================================================== OpenDoors 5.00 Manual End of Page 129 and background colour at the same time. These function presume that they are the only functions used within the door to set the colour of displayed text, and that the original text colour prior to calling either of these functions is dark white on black. These function must also have access to the two global variables "current_foreground" and "current_background", as defined below. void set_foreground(char foreground); void set_background(char background); unsigned char current_foreground=D_BLACK; unsigned char current_background=D_GREY; void set_foreground(char foreground) { /* set new text colour */ od_set_colour(foreground,current_background); current_foreground=foreground; /* save new foreground */ } void set_background(char background) { /* set new text colour */ od_set_colour(current_foreground,background); current_background=background; /* save new background */ } Using these functions, you would then be able to set just the foreground text colour by a function call like: set_foreground(L_YELLOW); Or set just the background text colour by a function call like: set_background(D_GREY); =============================================================================== OpenDoors 5.00 Manual End of Page 130 OD_SET_CURSOR() ------------------------------------------------------------------------------- PURPOSE Function to reposition the text cursor in ANSI, AVATAR or RIP mode FORMAT void od_set_cursor(int row, int col); RETURNS N/A DESCRIPTION This function will only have an effect if the user has ANSI, AVATAR or RIP graphics mode turned on. In graphics mode, this function can be used to position the cursor anywhere on the screen (cursor is moved both locally and on the remote terminal). The first parameter "row", can normally have a value between 1 to 23, and indicates the row, or y position on the screen, where the cursor should be located. The second parameter, "col", can have a value between 1 and 80, and indicates the column (x-position) on the screen, where the cursor should be located. SEE ALSO od_disp_emu(), od_clr_scr(), od_clr_line(), od_set_colour(), od_set_attrib() EXAMPLE Below is a simple sample door that demonstrates the use of the od_set_cursor() function. Note that this door detects whether or not graphics mode is available, and if it is not, will carry out the same task without the use of the od_set_cursor() function. #include "opendoor.h" int main(int argc,char *argv[]) { od_init(); /* Initialize door operations */ od_clr_scr(); /* Clear the screen */ if(od_control.user_ansi || od_control.user_avatar) { /* If graphics mode is available */ od_set_cursor(1,1); /* Display demo */ od_disp_str("Top, Left Corner"); od_set_cursor(1,70); od_disp_str("Top, Right Corner"); od_set_cursor(15,1); =============================================================================== OpenDoors 5.00 Manual End of Page 131 od_disp_str("Fifteenth line\n\r"); } else /* If graphics mode is not available */ { /* Display demo */ od_disp_str("Top, Left Corner"); od_repeat(' ', 54); od_disp_str("Top, Right Corner\n\r" /* Skip 13 lines */ od_disp_str("\n\n\n\n\n\n\n\n\n\n\n\n\n"); od_disp_str("Fifteenth line\n\r"); } od_get_key(TRUE); /* Wait for user to press key */ od_exit(FALSE,20); /* Exit door */ } =============================================================================== OpenDoors 5.00 Manual End of Page 132 OD_SET_DTR() ------------------------------------------------------------------------------- PURPOSE Controls the DTR (Data Terminal Ready) signal to the modem. Used primarily to cause the modem to "hang up". FORMAT void od_set_dtr(char high); RETURNS N/A DESCRIPTION In certain circumstances (such as call back verification doors), you may wish to "hang up" the modem without exiting your door program. This can be accomplished with most modems by controlling the DTR (Data Terminal Ready) signal to the modem. Passing a FALSE value to od_set_dtr() causes the DTR signal to be set low, and passing a TRUE value causes the DTR signal to be set high. Normally, OpenDoors maintains the DTR signal in its high state. Since most (but not all) modems are configured to disconnect from the remote modem when the DTR signal is set low, calling od_set_dtr(FALSE) can be used to hangup the modem. When hanging up by this method, you should be sure to set the DTR signal high again, after the carrier detect signal has disappeared. For more information on determining the state of the carrier detect signal, see the od_carrier() function, which is described on page 51. Note that not all modems will disconnect from the remote user in response to your lowering the DTR signal. If your software may be used with such modems, you may wish to also provide the option of disconnecting the modem by sending a "hang up" command sequence to the modem. Since OpenDoors normally monitors the carrier detect signal, and exits when this signal disappears, you will have to disable OpenDoor's carrier detection if you wish your program to continue executing after hanging up the modem. OpenDoor's automatic carrier detection can be disabled using the od_control.od_disable OpenDoors control structure variable, as follows: od_control.od_disable |= DIS_CARRIERDETECT; To re-enable carrier detection, you should turn off the DIS_CARRIERDETECT bit of od_disable, as follows: od_control.od_disable &=~ DIS_CARRIERDETECT; =============================================================================== OpenDoors 5.00 Manual End of Page 133 If you wish to hang up the modem when the user exits the door, you can simply use the od_exit() function. SEE ALSO od_carrier(), od_exit() EXAMPLE For an example of using the od_set_dtr() function to "hang up" the modem, see the example that accompanies the od_carrier() function, on page 52. =============================================================================== OpenDoors 5.00 Manual End of Page 134 OD_SET_PERSONALITY() ------------------------------------------------------------------------------- PURPOSE Sets the current status line / sysop function key personality to be used. FORMAT int od_set_personality(char *name); RETURNS TRUE on success FALSE on failure DESCRIPTION This function changes the current status line / sysop function key personality. The "name" parameter should contain the string which uniquely identifies the personality to be set. This function may only be used by OpenDoors programs which include the OpenDoors "Multiple Personality System". To enable use of the MPS, include the following line before your first call to any OpenDoors function: od_control.od_mps=INCLUDE_MPS; OpenDoors includes a number of built-in personalities. Additional personalities may be added using the od_add_personality() function, which is described on page 46. The following personalities are included with this version of OpenDoors: Name Description ----------------------------------------------------------- Standard OpenDoors style, similar to RA 1.11 PCBoard Similar to PC-Board RemoteAccess Similar to RemoteAccess 2.x Wildcat Similar to Wildcat! Personality names are not case sensitive. For more information on the OpenDoors Multiple Personality System, see the section which begins on page 223. This function returns TRUE on success, or FALSE on failure. In the case of a failure, the od_control.od_error variable is set to indicate the nature of the failure. For more information on the od_control.od_error variables, see page 182. SEE ALSO od_add_personality(), od_set_statusline() =============================================================================== OpenDoors 5.00 Manual End of Page 135 OD_SET_STATUSLINE() ------------------------------------------------------------------------------- PURPOSE To set the currently displayed status line. FORMAT void od_set_statusline(char setting); RETURNS N/A DESCRIPTION If you have the OpenDoors status line enabled within your door program (as is the default), the sysop will be able to control the setting of the status line using the F1 - F10 keys on the keyboard. These function keys are as follows: [F1] - Display basic door and user information [F2] - Display phone numbers and important dates [F3] - Display security flags and up/download info [F4] - Display system information and current time [F5] - Display message info and user's settings [F6] - Display chat reason and sysop's comment [F9] - Display help information for sysop [F10] - Turn off the status line Using the od_set_statusline() function, you can manually set which of these status line settings is currently selected. The od_set_statusline() accepts a single parameter, which should be one of the values listed below, which indicates which status line you would like to have selected: +---------------+---------------+------------------------------+ | | Corresponding | | | Value | Function Key | Meaning | +---------------+---------------+------------------------------+ | STATUS_NORMAL | [F1] | Basic door and user info | | STATUS_NONE | [F10] | Turn off status line | | STATUS_HELP | [F9] | Displays help for the sysop | | STATUS_USER1 | [F2] | Phone Numbers and dates | | STATUS_USER2 | [F3] | Security flags & up/downloads| | STATUS_USER3 | [F5] | Message info & user settings | | STATUS_USER4 | [F6] | Chat reason and sysop comment| | STATUS_SYSTEM | [F4] | System info & current time | +---------------+---------------+------------------------------+ (Note that these keys may be customized using variables in the OpenDoors control structure.) Keep in mind that the od_set_statusline() function only temporarily changes the current status line setting, and that =============================================================================== OpenDoors 5.00 Manual End of Page 136 the sysop will still be able to change the status line to any of the other settings using the function keys. For instance, if you wished to allow the sysop to normally see all 25 lines of text displayed by your door, but at the same time to still allow the sysop to turn on the status line at any time, you could place the line od_set_statusline(STATUS_NONE); at the beginning of your program. Similarly, when the user pages the sysop, OpenDoors itself calls od_set_statusline(STATUS_USER4); in order to display the status line which shows the user's reason for chat, while still allowing the sysop to switch back to any of the other status lines. If you wish to permanently turn off the OpenDoor's status line, without allowing the sysop to be able to turn it back on using the sysop function keys, simply set the "od_control.od_status_on" variable to FALSE. This variable is described in the OpenDoors control structure section of this manual, which begins on page 145. =============================================================================== OpenDoors 5.00 Manual End of Page 137 OD_SPAWN() ------------------------------------------------------------------------------- PURPOSE To facilitate easy execution of child tasks from doors. FORMAT int od_spawn(char *command_line); RETURNS TRUE on success, FALSE on failure DESCRIPTION This function allows you to easily run other programs from within your door programs, such as external file transfer utilities, compression utilities, and so on. This function will attempt to swap OpenDoors and your entire door to expanded memory or disk. OpenDoors swapping can be controlled by the OpenDoors control structure variables, od_swapping_disable, od_swapping_ems and od_swap_path. The od_spawn...() functions first attempt to swap OpenDoors to EMS memory. If enough EMS 3.2 or later memory is available, it will be used. If not, OpenDoors will swap to a disk file in the directory specified by the od_control.od_swap_path variable. Unlike the other Turbo C(++) / Borland C++ library functions such as system() or spawnf(), this function will automatically store the door screen prior to executing the sub-program, and will restore the screen upon return. This function will also store the current drive and directory settings prior to executing the program, and restore them after the program has returned. Normally, the user's time will continue to be decreased during the execution of the od_spawn() function. However, you can freeze the user's time during the spawn process by using the OpenDoors control structure variable od_spawn_freeze_time. SEE ALSO od_spawnvpe() EXAMPLE Below are a few examples of various uses of the od_spawn() function: To run the command processor from within your door program, to allow the sysop access to the DOS shell, simply use the following line of code: =============================================================================== OpenDoors 5.00 Manual End of Page 138 od_spawn(getenv("COMSPEC")); The following function is an example of using the od_spawn() function to call DSZ, allowing the user to download a file. You pass the name of the file that you wish to send to the user. This function will then ask the user what transfer protocol they would like to use, generate the appropriate DSZ command line, and then transmit the file to the user. Note that in order to use a door which implements this function, the external file transfer program "DSZ" must be available in the current search path. As an alternative, you may want to allow the sysop to specify the location of the DSZ file from within a configuration program. If you wish to receive a file (allow the user to upload), instead of sending one, simply change the "s" in the command line to a "r". char download(char *filename) { char commandline[80];/* string containing DSZ command line */ char protocol; /* character representing chosen protocol */ /* display protocol menu */ od_printf("Select File Transfer Protocol:\n\r"); od_printf(" [X] XModem\n\r"); od_printf(" [Y] YModem\n\r"); od_printf(" [Z] ZModem\n\r"); od_printf("or press [A] to abort transfer\n\r"); do /* loop until valid protocol has been chosen */ { protocol=od_get_key(); /* get key */ /* abort if [A] key is pressed */ if(protocol=='a' || protocol=='A') return(FALSE); } while(protocol!='x' && protocol!='y' && protocol!='z' && protocol!='X' && protocol!='Y' && protocol!='Z'); od_printf("Begin receiving file now or press [CTRL]-[X] to abort\n\r"); /* generate DSZ command line */ sprintf(commandline,"dsz port %d s%c %s", od_control.port+1, protocol, filename); return(od_spawn(commandline)); /* spawn to DSZ */ } =============================================================================== OpenDoors 5.00 Manual End of Page 139 OD_SPAWNVPE() ------------------------------------------------------------------------------- PURPOSE To facilitate easy execution of child tasks from doors. Allows specification of child's environment, returns errorlevel returned by child task, and searches path for the executable file. FORMAT int od_spawnvpe(int modeflag, char *path, char *argv[], char *envp[]); RETURNS -1 on failure errorlevel returned by child process on success DESCRIPTION This function behaves very similarly to the od_spawn() function. Thus, to save space in the manual, I will not recapitulate what is already said in the description of the od_spawn() function. Instead, this description concentrates on the additional features available through the od_spawnvpe() function. If you are not already familiar with the od_spawn() function, take a moment now to review the description of that function. The od_spawn() function (the OpenDoors "quick-spawn" function) is designed to be quick and easy to use, but does not have all of the features available in the od_spawnvpe() function. In addition to the features of the od_spawn() function, the od_spawnvpe() function also provides the following features: - od_spawnvpe() will search the "path" for the file to be executed. - od_spawnvpe() allows you to pass an altered environment to the child process. - od_spawnvpe() returns the errorlevel returned by the child process. The parameters passed to the od_spawnvpe() function are identical to those passed to the C spawnvpe() function. The first parameter should usually the be P_WAIT flag. The second parameter is the name of the child program to execute. If a full path to the child program is not specified, and the child program does not exist in the current directory, OpenDoors will search the directories listed by the PATH environment variable. Also, if the .EXE or .COM extension is not provide, OpenDoors will look first for a .COM file, and if not found, for a .EXE file. The third parameter is an array of arguments to pass to =============================================================================== OpenDoors 5.00 Manual End of Page 140 the child process, or NULL if no arguments are to be passed. The fourth parameter is the environment to be passed to the child process, or NULL if the a copy of the current environment should be used. SEE ALSO od_spawn() EXAMPLE For an example of the use of the od_spawn...() functions, see the example accompanying the od_spawn() function. As a specific example of the od_spawnvpe function, consider the following code which executes the "TEST.EXE" program. od_spawnvpe(P_WAIT,"TEST.EXE",NULL,NULL); =============================================================================== OpenDoors 5.00 Manual End of Page 141 OD_WINDOW_CREATE() ------------------------------------------------------------------------------- PURPOSE Creates a popup window of the specified size and colour, storing the contents of the screen "under" the window. The window can later be removed from the screen, restoring the original contents of the screen "under" the window, using the od_window_remove() function. Requires ANSI, AVATAR or RIP mode. FORMAT void *od_window_create(int left, int top, int right, int bottom, char *title, char boardcol, char titlecol, char insidecol, int reserved); RETURNS Pointer to newly allocated window structure on success NULL on failure DESCRIPTION This function creates a pop-up window on the remote and local screens. The contents of the screen beneath the window are stored, to allow the window to later be removed from the screen using the od_window_remove() function. The window is drawn using the boarder characters defined in the already existing od_control.od_box_chars[] array. The boarder is displayed using the colour attribute specified in "boardcol". The working area of the window is created in the colour specified in "insidecol". A title may optionally be displayed on the window by specifying a string in "title". This title will be displayed in the colour specified by "titlecol". If you do not wish a title to be displayed, pass an empty string or NULL pointer in "title". On success, od_window_create() will return a pointer to a buffer which was allocated to store information on the window and the contents of the screen "under" the window. This pointer should at some point be passed in a call to od_window_remove(). This function requires ANSI, AVATAR or RIP graphics mode. If AVATAR mode is active, this function will take advantage of special AVATAR control sequences to display the window much faster than is possible in ANSI mode. In ANSI mode, window display will be faster if "boardcol" and "titlecol" are equal. Note that the "reserved" parameter of this function is not currently used. To preserve compatibility with future versions of OpenDoors, this parameter should always be set to 0. Currently, the size of the buffer allocated to store the window information will be (length*witdth*2) + 4 bytes in size. Due to the differences between ANSI and AVATAR terminal emulation in different software packages, it is not recommended to create windows when the remote screen may have been scrolled =============================================================================== OpenDoors 5.00 Manual End of Page 142 since the last call to od_clr_scr(). You should also avoid creating windows that cover the bottom right-hand corner of the screen. If od_window_create() fails for any reason, a value of NULL is returned, and the od_control.od_error variable is set to indicate the reason for the failure. For more information on the od_control.od_error variable, see page 182. SEE ALSO od_window_remove(), od_draw_box(), od_gettext(), od_puttext(), od_save_screen(), od_restore_screen(), od_scroll() EXAMPLE =============================================================================== OpenDoors 5.00 Manual End of Page 143 OD_WINDOW_REMOVE() ------------------------------------------------------------------------------- PURPOSE Removes a window previously created using od_window_create(), restoring the original screen background. FORMAT int od_window_remove(void *info); RETURNS TRUE on success FALSE on failure DESCRIPTION The od_window_remove() function removes a window from the screen which was previously created by od_window_create(), and deallocates the memory which was allocated to store the window information. The contents of the screen beneath the window is restored to appear as it did prior to the call to od_window_create(). Note that overlapping windows must be removed in the reverse order from which they were created for proper display results. The last window to be created must be the first window to be removed. If od_window_remove() fails for any reason, a value of FALSE is returned, and the od_control.od_error variable is set to indicate the reason for the failure. For more information on the od_control.od_error variable, see page 182. SEE ALSO od_window_create(), od_draw_box(), od_gettext(), od_puttext(), od_save_screen(), od_restore_screen(), od_scroll() EXAMPLE For an example of the use of the od_window_remove() function, see the example which accompanies the description of the od_window_create() function. The od_window_create() function is documented on page 142. =============================================================================== OpenDoors 5.00 Manual End of Page 144 ------------------------------------------------------------------------------- CHAPTER 5 - THE OPENDOORS CONTROL STRUCTURE ------------------------------------------------------------------------------- INTRODUCTION TO THE CONTROL STRUCTURE ------------------------------------------------------------------------------- The OpenDoors "Control Structure" is used by OpenDoors in order to provide you with a wide range of information about the system on which you door is running, and the user who is currently using the door, along with providing you a means by which to customize much of OpenDoor's behavior. Using the OpenDoors control structure, you can access or alter information about the user who is online, information about the system on which your door is running, and information about OpenDoors itself. You can also use the control structure to customize all of the text displayed by OpenDoors, the function keys to which it responds, and many other aspects of OpenDoor's behavior. The OpenDoors control structure is quite simply a normal C "struct", named od_control, and is defined in the OPENDOOR.H file. This "struct" contains many different variables, which provide you access to the information provided by the control structure. Hence, to access the contents of a control structure variable, for example the variable "system_name" which contains the name of the BBS the door is running under, you would use: od_control.system_name The following section of this chapter contains a complete reference to all of the variables which make up the OpenDoors control structure. This reference includes the name, type and complete description of the use of each variable. The reference is divided into the following categories of variables, with the reference to the variables in each section beginning on the listed page. Door Information File Statistics .................147 Modem Settings ...................................151 BBS and Caller Information .......................156 Door Settings ....................................179 OpenDoors Behavior Customization .................184 Function Keys Customization ......................206 Colour Customization .............................227 Text Customization ...............................212 Within each section, variables are listed alphabetically, according to their names. =============================================================================== OpenDoors 5.00 Manual End of Page 145 If you would like more information on C "struct"s, please refer to your Turbo C(++)/Borland C++ manuals. Also, in order to make use of some of the variables in the OpenDoors control structure, it is important to understand the concepts of Boolean (TRUE/FALSE), and bit-mapped flag variables. If you are not familiar with these two terms, they are described in detail in the glossary, located towards the end of this manual. =============================================================================== OpenDoors 5.00 Manual End of Page 146 CONTROL STRUCTURE - DOOR INFO FILE STATS ------------------------------------------------------------------------------- The following OpenDoors control structure variables provide your program with information concerning the door information file from which OpenDoors obtained the BBS and caller information that is found elsewhere in the control structure. The following control structure items are listed in this section: info_path Contains the path to the door information file od_info_type Type of door information file that was found od_node Node number the door is running under user_timeofcreation The time at which the door information file was created ------------------------------------------------------------------------------- info_path char od_control.info_path[60]; This variable stores the location of the door information file (such as DORINFO?.DEF, EXITINFO.BBS, CHAIN.TXT, DOOR.SYS, CALLINFO.BBS, SFDOORS.DAT, etc.), from which OpenDoors will read and write information about the BBS and the caller online. Note, however, that this variable only contains the path to this file, and not the name of the file itself. For example, if your door knew that the door information file resided in C:\BBS, this variable might contain "C:\\BBS\\". Remember that when programming in C, that you must place two backslash characters in a literal string in order to have a single backslash placed in the actual string, as shown in the example string above. The info_path variable is not case sensitive, and may or may not include the trailing backslash in the directory name. OpenDoors only uses this variable when it first starts up, during the od_init() function, and when it shuts down, during the od_exit() function. Thus, if you wish to alter the setting of the info_path variable, you must do so before calling od_init(), or any other OpenDoors functions. Also, you will not normally want to change the value of this variable after having called od_init() or any OpenDoors functions, as doing so would cause OpenDoors to re-write the caller information to another door information file in a different directory. This would most likely prevent the BBS system which your door is running under =============================================================================== OpenDoors 5.00 Manual End of Page 147 from being able to re-read the changes to the door information file. It is usually a good idea to design any door in such a way as to allow the user of the door to specify the location of the door information file. This will allow the sysop to place your door in it's own directory, and will facilitate the use of your door on multi-line BBS systems. If your door has a configuration file, you may wish to include a setting in the configuration file to indicate the location of the door information file. However, an even better design choice would be to allow the location of the door information file to optionally be passed to the door on the command line, as the example door, EZVote does. The following trivial door illustrates a method of reading and setting the location of the door information file from the door's command line: #include "opendoor.h" main(int argc, char *argv[]) { if(argc>1) strncpy(od_control.info_path,argv[1],59); od_disp_str("This is a sample OpenDoors door.\n\r"); od_disp_str("Press any key to continue...\n\r"); od_get_key(TRUE); od_exit(20); } ------------------------------------------------------------------------------- od_info_type char od_control.od_info_type; This variable indicates the type of information file from which OpenDoors has obtained the BBS and caller information that is found elsewhere in the OpenDoors control structure. This variable will have one of the following values, indicating that the door information file was of the corresponding type: =============================================================================== OpenDoors 5.00 Manual End of Page 148 +----------------+----------------------------+ | od_info_type | Door Information File Type | | Value | | +----------------+----------------------------+ | DORINFO1 | DORINFO?.DEF | | EXITINFO | EXITINFO.BBS (Normal) | | RA1EXITINFO | EXITINFO.BBS (Extended) | | RA2EXITINFO | EXITINFO.BBS (RA 2.x) | | QBBS275EXITINFO| EXITINFO.BBS (QuickBBS) | | CHAINTXT | CHAIN.TXT | | SFDOORSDAT | SFDOORS.DAT | | CALLINFO | CALLINFO.BBS | | DOORSYS_GAP | DOOR.SYS (GAP/PC-Board) | | DOORSYS_DRWY | DOOR.SYS (Doorway style) | | DOORSYS_WILDCAT| DOOR.SYS (WildCat standard)| | CUSTOM | Custom door information | | | file, defined in config | | | file. | | NO_DOOR_FILE | No drop file was found. | +----------------+----------------------------+ The value of this variable is only valid AFTER od_init() or some OpenDoors function has been called. Note that this variable should be treated as a read-only variable, and should not normally be altered by your program. Altering this variable may cause OpenDoors to re-write a different type of door information file upon exiting, than was read upon startup. ------------------------------------------------------------------------------- od_node char od_control.od_node; This variable indicates the node number that the door is running under. If this information is supplied by the BBS in the door information file, the node number will be automatically by OpenDoors. Specifically, the node number can be determined automatically from systems that produce an SFDOORS.DAT, PC- Board/GAP style DOOR.SYS or Wildcat style DOOR.SYS door information file. If this information is not supplied in the door information file, but is provided by the sysop in the door's configuration file, OpenDoors will use the value found there. Alternatively, you can set this variable manually. On systems that produce a DORINFO?.DEF file, OpenDoors will use this variable to determine which DORINFO?.DEF file to search for. For instance, if od_control.od_node is set to 3, OpenDoors will first search for a DORINFO3.DEF file. If this file is not found, OpenDoors will then default to the DORINFO1.DEF filename. =============================================================================== OpenDoors 5.00 Manual End of Page 149 ------------------------------------------------------------------------------- user char od_control.user_timeofcreation[6]; _timeof creation This variable contains the time of day at which the door information file was created. This variable is available only when the door is running under a system that produces an EXITINFO.BBS file. To determine what type of door information file your door is running under, see the od_control.od_info_type variable, below. =============================================================================== OpenDoors 5.00 Manual End of Page 150 CONTROL STRUCTURE - SERIAL PORT SETTINGS ------------------------------------------------------------------------------- The following OpenDoors control structure items store the communications settings that OpenDoors uses to communicate with the modem. These values are normally set upon the first call to an OpenDoors function, during the od_init() procedure. However, you may need to manual set this variables if: - you wish to allow greater configurability of your door - you are reading the door information file yourself - you are using the OpenDoors to write a non-door program Some of these variables are always used by OpenDoors, while others are only relevant if OpenDoor's built-in serial communications code is being used instead of a FOSSIL driver. Those that are only used when no FOSSIL driver is present are denoted by an [*] in the list below. The control structure variables controlling OpenDoor's serial port settings are as follows: od_control.baud Serial Port BPS rate od_control.od_com_address Serial Port address [*] " " .od_com_fifo_trigger 16550A FIFO trigger szie od_control.od_com_irq Serial Port IRQ number [*} od_control.od_com_method Is FOSSIL or built-in serial I/O being used od_control.od_com_no_fifo Disables use of 16550A FIFOs [*] od_control.od_com_rx_buf Size of receive buffer [*] od_control.od_com_tx_buf Size of transmit buffer [*] od_control.od_no_fossil Prevents OpenDoors from using a FOSSIL driver, even if one is available. od_control.port Serial port number, 0 based. =============================================================================== OpenDoors 5.00 Manual End of Page 151 ------------------------------------------------------------------------------- baud unsigned long od_control.baud; This variable contains the BPS rate at which the computer is communicating with the modem, not to be confused with the BPS rate at which the local modem is communicating with the remote modem. A value of 0 indicates that the door is operating in local mode. If a FOSSIL driver is being used for serial I/O, this value is ignored if it does not correspond to one of the baud rates that an application can directly set a FOSSIL driver to. The BPS rates recognized by FOSSIL drivers are: 300, 600, 1200, 2400, 4800, 9600, 19200, 38400. If any other BPS rate is to be used, the FOSSIL driver must be locked at that BPS from the FOSSIL driver command-line. When locked, FOSSIL drivers ignore any attempt by an application to change the BPS rate of the locked port. For this reason, the od_control.baud setting has no effect on the FOSSIL driver if it is locked. If a FOSSIL driver is not being used for serial I/O, this value my be any BPS rate from 2 to 115,200 that is evenly divides 115,200 (eg: 115200, 57600, 38400, 28800, 23040, 19200, 14400, 12800, 9600, etc.). This variable should only be change prior to calling od_init() or the first OpenDoors function. ------------------------------------------------------------------------------- od_com_ int od_control.od_com_address; address This variable is only used when OpenDoors is NOT performing serial I/O using a FOSSIL driver. (When a FOSSIL driver is being used, the serial port address can be set from the FOSSIL driver command line). This variable may optionally be set to specify the base address of the serial port to be used. For ports COM1: through COM4:, OpenDoors can normally determine the serial port address automatically. However, for other serial ports, the port address must be specified using this variable. If you are not specifying a serial port address with this variable, do not change it's default value of 0. This variable should only be changed before your first call to od_init() or any other OpenDoors function. =============================================================================== OpenDoors 5.00 Manual End of Page 152 ------------------------------------------------------------------------------- od_com_ char od_control.od_com_fifo_trigger; fifo_trigger This variable is only used when OpenDoors is NOT performing serial I/O using a FOSSIL driver. (When a FOSSIL driver is being used, the IRQ line can be set from the FOSSIL driver command line). This variable sets the number of bytes that will be placed in the 16550A UART FIFO buffers before an interrupt is triggered, if the 16550A UART FIFOs are used. Valid values are 1, 4, 8 and 14. ------------------------------------------------------------------------------- od_com_ unsigned char od_control.od_com_irq; irq This variable is only used when OpenDoors is NOT performing serial I/O using a FOSSIL driver. (When a FOSSIL driver is being used, the IRQ line can be set from the FOSSIL driver command line). This variable may optionally be set to specify the IRQ line to be used for the serial port. By default, OpenDoors uses the normal IRQ 4 line for ports COM1: and COM3:, and IRQ 3 for ports COM2: and COM4:. To override this default, the IRQ line can be set using this variable. If you are not specifying an IRQ line with this variable, do not change it's default value of 0. This variable should only be changed before your first call to od_init() or any other OpenDoors function. ------------------------------------------------------------------------------- od_com_ char od_control.od_com_method; method This read-only variable reports the method that OpenDoors is using for serial I/O. This variable is set during od_init() or the first call to an OpenDoors function. This variable can be one of the following values: COM_FOSSIL - Indicates that a FOSSIL driver is being used COM_INTERNAL - Indicates that OpenDoor's internal serial I/O code is being used. OpenDoors normally automatically determines whether not a FOSSIL driver is available, and will attempt to use a FOSSIL driver if possible. You can force OpenDoors to always perform serial I/O using its internal communications code, bypassing a FOSSIL driver if present, by setting the od_control.od_no_fossil variable to TRUE. =============================================================================== OpenDoors 5.00 Manual End of Page 153 ------------------------------------------------------------------------------- od_com_ char od_control.od_com_no_fifo; no_fifo This variable is only used when OpenDoors is NOT performing serial I/O using a FOSSIL driver. (When a FOSSIL driver is being used, the receive buffer size can be set from the FOSSIL driver command line). Normally, OpenDoors will use a 16550A FIFO buffer if a 16550A UART is installed. You can disable the use of the 16550A FIFO buffer by setting this variable to TRUE. ------------------------------------------------------------------------------- od_com_ unsigned int od_control.od_com_rx_buf; rx_buf This variable is only used when OpenDoors is NOT performing serial I/O using a FOSSIL driver. (When a FOSSIL driver is being used, the receive buffer size can be set from the FOSSIL driver command line). This variable allows you to set the size of OpenDoor's serial I/O receive buffer. If you do not set this buffer size, a default value of 256 characters is used. Normally, this buffer size is more than large enough for door programs. However, if you find that inbound characters are lost before they can be processed by your program, you may wish to increase the size of this buffer. This variable should only be changed before your first call to od_init() or any other OpenDoors function. ------------------------------------------------------------------------------- od_com_ unsigned int od_control.od_com_rx_buf; rx_buf This variable is only used when OpenDoors is NOT performing serial I/O using a FOSSIL driver. (When a FOSSIL driver is being used, the receive buffer size can be set from the FOSSIL driver command line). This variable allows you to set the size of OpenDoor's serial I/O receive buffer. If you do not set this buffer size, a default value of 256 characters is used. Normally, this buffer size is more than large enough for door programs. However, if you find that inbound characters are lost before they can be processed by your program, you may wish to increase the size of this buffer. =============================================================================== OpenDoors 5.00 Manual End of Page 154 This variable should only be changed before your first call to od_init() or any other OpenDoors function. ------------------------------------------------------------------------------- port char od_control.port; This variable contains the serial port number that the modem is connected. This number is 0 based, so that a value of 0 corresponds to COM1:, a value of 1 corresponds to COM2:, and so on. This value will normally be set by the od_init() function, when the door information file is read, and should not be changed after modem initialization has been carried out by the od_init() function. In other words, od_control.port should generally be treated as a read-only variable. This variable will most often be useful in passing the port number to an external program, such as DSZ. =============================================================================== OpenDoors 5.00 Manual End of Page 155 CONTROL STRUCTURE - BBS AND CALLER INFORMATION ------------------------------------------------------------------------------- As we have already described, there are two types of variables in the OpenDoors control structure. Some of the variables are simply used to allow you to customize OpenDoor's various features, such as altering colours, prompts, timeouts, etc. Other variables in the OpenDoors control structure serve to provide you with information about the user who is online and the BBS system your door is running under. This section deals with those variables that provide you with information about the BBS and the user. The information in these variables is read from the door information file, a small file created by the BBS specifically for the purpose of communicating with door programs. Depending on what BBS system your door is running under, the type of door information file will vary. Since different door information files do not all provide the same pieces of information, some variables in this section will only be available when your door is running under particular BBS systems. Other variables will be available with many or all BBS systems. In the description of each variable in this section, we indicate under which door information files the particular variable will be . So, if you wish to access a variable that is only under certain door information files, your program should test whether or not the required information is available under the particular door information file that was found. In order to determine which door information file your door is running under, you should use the od_control.od_info_type variable. This variable is described in the section which begins on page 147. If you test the value of the od_control.od_info_type variable, and find that the required information is not available, you may wish to simply use some sort of default value for the variable, or alternatively, not allow your door to run under certain BBS systems. Another possibility, if the required information is not available, is imply to obtain this information from the user yourself. For example, if you wished to know the length of the user's screen, when this information is not available from the door information file, you could simply prompt the user for their screen length the first time they use your door. This information could then be stored in your door's data files for future reference. As an example of testing what door information file your door is running under, consider the case where you wanted to display the user's birthday. The example below will display the user's birthday if it is known, and otherwise, print the string "unknown". if(od_control.od_info_type==RA1EXITINFO) =============================================================================== OpenDoors 5.00 Manual End of Page 156 { od_disp_str(od_control.user_birthday); } else { od_disp_str("Unknown"); } The chart below lists the door information file formats that OpenDoors recognizes, along with example BBS systems that produce these files and a reference letter for each type. Thus, an OpenDoors door can run DIRECTLY under ANY BBS SYSTEM that produces one of these files formats, and under ANY OTHER BBS system when used in conjunction with a door information file conversion utility. +--------------------------+----------------------------------------+ | FILE FORMAT | EXAMPLE BBS SYSTEMS | +--------------------------+----------------------------------------+ | CHAIN.TXT | WWIV | +--------------------------+----------------------------------------+ | DORINFO1.DEF | RBBS-PC | +--------------------------+----------------------------------------+ | DORINFO1.DEF | QuickBBS | | & | Remote Access (versions 0.01-0.04) | | EXITINFO.BBS (Std. Ver.) | | +--------------------------+----------------------------------------+ | DOOR.SYS (DoorWay Style) | Remote Access | +--------------------------+----------------------------------------+ | DOOR.SYS (PCB/GAP Style) | PC-Board | | | GAP | +--------------------------+----------------------------------------+ | DOOR.SYS (WildCat Style) | Wildcat 3.00 and above | | | Telegard | +--------------------------+----------------------------------------+ | SFDOORS.DAT | Spitfire | | | TriTel | +--------------------------+----------------------------------------+ | CALLINFO.BBS | WildCat 2.xx | +--------------------------+----------------------------------------+ | DORINFO1.DEF | Remote Access (versions 1.00 and later)| | & | | | EXITINFO.BBS (Ext. Ver.) | | +--------------------------+----------------------------------------+ =============================================================================== OpenDoors 5.00 Manual End of Page 157 The following chart lists all of the OpenDoors control structure variables in this section, along with a brief description of their use. The variables are then described in detail, below. +-----------------------+-----------------------------------------------+ | VARIABLE NAME | VARIABLE CONTENTS | +-----------------------+-----------------------------------------------+ | EMSI INFORMATION | Information on current IEMSI session | | event_status | The status of the next system event | | event_starttime | The start time of the next system event | | event_errorlevel | The errorlevel of the next system event | | event_days | The days of the week to execute the event | | event_force | Whether the next system event is forced | | event_last_run | When the next system event was last run | | sysop_name | The name of the BBS's sysop | | system_calls | Total number of calls BBS has received | | system_last_caller | The name of the last caller to the BBS | | system_name | The name of the BBS | | TIMELOG VARIABLES | The times at which the BBS has been most busy | | user_ansi | Whether the user has ANSI graphics mode on | | user_attribute | User attribute bit-mapped flags | | user_attrib2 | Second set of user attribute bit-mapped flags | | user_avatar | Whether the user has AVATAR graphics mode on | | user_birthday | The date the user was born | | user_callsign | The user's amateur radio call sign | | user_combinedrecord | The user's combined message areas settings | | user_comment | Sysop's comment about the user | | user_credit | Amount of NetMail credit the user has | | user_dataphone | The user's data phone number | | user_date_format | Format user wishes to have dates displayed in | | user_deducted_time | Total time that has been subtracted from user | | user_downk | Total Kilobytes downloaded by the user | | user_downlimit | User's daily download limit | | user_downloads | Total number of files downloaded by the user | | user_echomailentered | Whether or not the user has entered EchoMail | | user_error_free | Whether or not connection is error-free | | user_file_area | The user's current file area | | user_firstcall | Date of the user's first call to the BBS | | user_flags | User's sysop-defined flag settings | | user_forward_to | Name to forward user's mail to | | user_group | User's group number | | user_handle | User's alias | | user_homephone | User's home telephone number | | user_language | User's language setting | | user_last_pwdchange | Total calls since last password change | | user_lastdate | Date of the user's last call | | user_lastread | Highest message number read by user | | user_lasttime | Time of the user's last call | | user_location | Name of the city where the user lives | | user_logindate | Date on which the current call began | +-----------------------+-----------------------------------------------+ =============================================================================== OpenDoors 5.00 Manual End of Page 158 +-----------------------+-----------------------------------------------+ | VARIABLE NAME | VARIABLE CONTENTS | +-----------------------+-----------------------------------------------+ | user_loginsec | User's security at the beginning of this call | | user_logintime | Time at which the current call began | | user_logonpassword | User's password at the beginning of this call | | user_menustack | Contents of the user's current menu stack | | user_menustackpointer | Pointer to the top of the menu stack | | user_messages | Total number of messages written by the user | | user_msg_area | The user's current message area | | user_name | The user's name | | user_net_credit | The user's remaining netmail credit | | user_netmailentered | Whether or not the user has entered NetMail | | user_num | The user's record number in the user file | | user_numcalls | Number of calls the user has made to the BBS | | user_numpages | Number of times the user has paged the sysop | | user_password | The user's current password | | user_pending | The value of unsent NetMail written by user | | user_reasonforchat | The reason the user wishes to chat with sysop | | user_screen_length | The length of the user's screen | | user_screenwidth | The width of the user's screen | | user_security | The user's security access level | | user_sex | The user's gender | | user_subdate | The date the user's subscription expires | | user_timelimit | The user's daily time limit | | user_todayk | Kilobytes downloaded by the user today | | user_upk | Total Kilobytes uploaded by the user | | user_uploads | Total number of files uplaoded by the user | | user_wantchat | Whether or not the user wishes to chat | | user_xi_record | The user's record in the USERSXI.BBS file | +-----------------------+-----------------------------------------------+ ------------------------------------------------------------------------------- EMSI char od_control.ra_emsi_session; INFORMATION char od_control.ra_emsi_crtdef[41]; char od_control.ra_emsi_protocols[41]; char od_control.ra_emsi_capabilities[41]; char od_control.ra_emsi_requests[41]; char od_control.ra_emsi_software[41]; char od_control.ra_hold_attr1; char od_control.ra_hold_attr2; char od_control.ra_hold_len; These variables provide your door with information pertaining to an interactive EMSI session that has been established. Note that these variables are only available under systems that produce an RA 1.00 and later style extended EXITINFO.BBS door information file. =============================================================================== OpenDoors 5.00 Manual End of Page 159 If an IEMSI session has been established, the Boolean variable od_control.ra_emsi_session will be TRUE, and if no session has not been established, this variable will be FALSE. A full discussion of the IEMSI protocol is beyond the scope of this manual. Specifications for the IEMSI protocol are available from the OpenDoors support BBS. ------------------------------------------------------------------------------- event_days unsigned char od_control.event_days; This variable is a bit-mapped flag of the days of the week on which the next system event is run. The bit-map bits are as follows: +-----+------+-----------+ | BIT | MASK | MEANING | +-----+------+-----------+ | 0 | 0x01 | Sunday | | 1 | 0x02 | Monday | | 2 | 0x04 | Tuesday | | 3 | 0x08 | Wednesday | | 4 | 0x10 | Thursday | | 5 | 0x20 | Friday | | 6 | 0x40 | Saturday | | 7 | 0x80 | All Days | +-----+------+-----------+ For more information on bit-mapped flags, see the glossary item entitled "BIT-MAPPED FLAGS". This variable is only available under systems that produce an EXITINFO.BBS door information file. ------------------------------------------------------------------------------- event_ unsigned char od_control.event_errorlevel; errorlevel This variable contains the ErrorLevel associated with the next system event. This variable is only available under systems that produce an EXITINFO.BBS door information file. ------------------------------------------------------------------------------- event char od_control.event_force; _force This variable indicates whether the next system event should be forced to run at a particular time. If this variable contains a value of TRUE, then the user should be forced off-line in order =============================================================================== OpenDoors 5.00 Manual End of Page 160 to accommodate the event, and if this variable is false, then the event can wait until after the user logs off normally. This variable is only available under systems that produce an EXITINFO.BBS file. ------------------------------------------------------------------------------- event char od_control.event_last_run[9]; _last_run This variable contains a string representing the date on which the next system event was last run, and is in the same format as the user_lastdate variable. This variable is only available under systems that produce an EXITINFO.BBS file. ------------------------------------------------------------------------------- event char od_control.event_starttime[6]; _starttime This variable contains a string representing the time at which the next system event is scheduled to start, in the same format as the user_lasttime variable. This variable is only available under systems that produce an EXITINFO.BBS or Wildcat style DOOR.SYS door information file. ------------------------------------------------------------------------------- event unsigned char od_control.event_status; _status This variable represents the status of the next system event, and will be equal to the value ES_ENABLED if and only if the other event information contained in the control structure is valid. This variable is only available under systems that produce an EXITINFO.BBS file. ------------------------------------------------------------------------------- sysop_name char od_control.sysop_name[40]; The od_control.sysop_name variable contains the name of the sysop of the BBS under which your door is running. This variable is available under any BBS system that produces a DORINFO?.DEF (including RA & QBBS which process both DORINFO1.DEF and EXITINFO.BBS files), or Wildcat style DOOR.SYS file. =============================================================================== OpenDoors 5.00 Manual End of Page 161 ------------------------------------------------------------------------------- system_calls long od_control.system_calls; This variable contains the total number of calls that have been placed to the BBS, and is available under any BBS which produces an EXITINFO.BBS file. ------------------------------------------------------------------------------- system_last char od_control.system_last_caller[36]; _caller This string contains the name of the previous caller to the BBS, on any line, and is available under EXITINFO.BBS. ------------------------------------------------------------------------------- system_name char od_control.system_name[40]; The od_control.system_name variable contains the name of the BBS under which your door is running. This variable is available under any BBS system that produces a DORINFO?.DEF (including RA & QBBS which process both DORINFO1.DEF and EXITINFO.BBS files). ------------------------------------------------------------------------------- TIMELOG char od_control.timelog_start_date[9]; VARIABLES This string contains the date of the beginning of the time period for which the time log is recorded. This variable is available under any system that produces an EXITINFO.BBS file. int od_control.timelog_busyperhour[24]; This variable is an array of 24 elements, with each element indicating the total number of times the BBS was in use during each of the 24 hours of the day. Element 0 corresponds to the time period of 0:00-1:00, element 1 corresponds to the time period of 1:00-2:00, and so on. In order to determine the frequency of system use during any hour as a percentage, simply calculate the total of all 24 entries in the array, and divide any given entry by the total, in order to come up with an average. This variable is available under any system that produces an EXITINFO.BBS file. int od_control.timelog_busyperday[7]; This variable is an array of 7 elements, with each element indicating the total number of times the BBS was in use during each of the 7 days of the week. Here, elements 0 corresponds to =============================================================================== OpenDoors 5.00 Manual End of Page 162 Sunday, element 1 to Monday, and so on. In order to calculate the frequency of system use during any day of the week, use the same method as for calculating the frequency of calls during each hour, as described above. This is only available under systems that produces an EXITINFO.BBS file. Note that at least some, if not all, versions of RemoteAccess do not maintain this variable correctly, and thus even with the presence of an EXITINFO.BBS file, this array may contain all zero entries. ------------------------------------------------------------------------------- user_ansi char od_control.user_ansi; This variable contains a Boolean value, indicating whether or not the user has ANSI mode turned on. If ANSI graphics mode is enabled, this variable will contain a value of TRUE, and if ANSI graphics mode is disabled, this variable will contain a value of FALSE. Many of the OpenDoors functions test the setting of this variable in order to determine whether or not they should send ANSI-graphics control characters. Also, if this variable contains a TRUE value, OpenDoors will display an "[ANSI]" indicator on the status line. You may change the value of this variable at any time after the first call to od_init() or any other OpenDoors functions. Depending upon what BBS system your door is running under, changes to this variable may or may not result in changes to the user's ANSI setting upon return to the BBS. This variable is available under all door information file formats. ------------------------------------------------------------------------------- user_ unsigned char od_control.user_attribute; attribute This variable is a bitmap of eight flags, each of which represent individual pieces of information pertaining to the user that is currently online. These flags are as follows: +-----+------+-----------------------+ | BIT | MASK | DESCRIPTION | +-----+------+-----------------------+ | 0 | 0x01 | Is the user deleted | | 1 | 0x02 | Is screen clearing on | | 2 | 0x04 | Is "more" prompt on | | 3 | 0x08 | Is ANSI mode on | | 4 | 0x10 | User no-kill setting | | 5 | 0x20 | Transfer-priority | | 6 | 0x40 | Full screen editor | | 7 | 0x80 | Quiet mode | +-----+------+-----------------------+ =============================================================================== OpenDoors 5.00 Manual End of Page 163 For more information on using and setting bit-mapped flags, please see the entry entitled "BITMAPED FLAGS" in the glossary of this manual. Note that this variable is only available under systems that produce and EXITINFO.BBS format door information file. ------------------------------------------------------------------------------- user_ unsigned char od_control.user_attrib2; attrib2 See the user_attrib variable for more information. This variable is like the user_attrib variable, except that it contains different information. The bit-mapped flags for the od_control.user_attrib2 variable are as follows: +-----+------+-----------------------+ | BIT | MASK | DESCRIPTION | +-----+------+-----------------------+ | 0 | 0x01 | User hot-keys setting | | 1 | 0x02 | Is AVATAR graphics on | | 2 | 0x04 | Full screen reader | | 3 | 0x08 | Hidden from userlist | +-----+------+-----------------------+ Note that this variable is only available under systems that produce an EXITINFO.BBS door information file. ------------------------------------------------------------------------------- user_avatar char od_control.user_avatar; This variable is a Boolean value indicating whether or not AVATAR graphics mode is on. If AVATAR graphics is available, then many of the OpenDoors functions will make use of AVATAR graphics codes for greater display speed. If AVATAR graphics mode is on, a [AVT] indicator will appear on the status line. If your door is running under a system which produces an RA 1.00+ style extended EXITINFO.BBS door information file, the user_avatar variable is set automatically. If the extended EXITINFO.BBS file is not available, this value will default to FALSE. In this case, you may wish to ask the user whether or not they wish to use AVATAR graphics, and thus set this variable yourself. =============================================================================== OpenDoors 5.00 Manual End of Page 164 ------------------------------------------------------------------------------- user char od_control.user_birthday[9]; _birthday This variable is a string, in the same format as the od_control.user_lastcall variable, which stores the date of the user's birthday, if it is available. This variable is only available under systems that produce an RA 1.00 and later style extended EXITINFO.BBS or Wildcat style DOOR.SYS file. ------------------------------------------------------------------------------- user char od_control.user_callsign[12]; _callsign This variable is a string which contains the user's amateur radio call sign, if any. This variable is only available under systems that produce a CHAIN.TXT file. ------------------------------------------------------------------------------- user_combined unsigned char od_control.user_combinedrecord[25]; record This variable is an array of bit-mapped flags, with each flag corresponding to an individual message area. In this case, the first bit of od_control.ra_combinedrecord[0] corresponds to the first message area, the second bit to the second message area, and so on. If any given bit-flag is turned on, then the user has corresponding message area enabled for combined access, and if the bit is turned off, the user does not have the area enabled for combined access. A detailed description of the combined message access is beyond the scope of this manual. This variable is only available under systems that produce an RA 1.00 or later style extended EXITINFO.BBS door information file. ------------------------------------------------------------------------------- user_comment char od_control.user_comment[81]; This variable is a string which contains the sysop's comment about the user that is currently online. This comment may be displayed on the OpenDoors status line, if this variable is available. This variable is available under systems that produce an RA 1.00 and later style extended EXITINFO.BBS or Wildcat style DOOR.SYS file. ------------------------------------------------------------------------------- user_credit unsigned int od_control.user_credit; This variable contains the total amount of NetMail credit that the caller has left. Changes to this variable will be by the BBS =============================================================================== OpenDoors 5.00 Manual End of Page 165 when your door exits and control is returned to the BBS. This variable is only available under systems that produce an EXITINFO.BBS door information file. ------------------------------------------------------------------------------- user_ char od_control.user_dataphone[13]; dataphone This string contains the user's data or business phone number, if available. This value is only available under system that produce EXITINFO.BBS, PC-Board/GAP style DOOR.SYS and WildCat DOOR.SYS format door information files. ------------------------------------------------------------------------------- user int od_control.user_deducted_time; _deducted _time This variable contains a signed integer value, which indicates the total amount of time that has been deducted from the user during this call. This variable is only available under systems that produce an RA 1.00 and later style extended EXITINFO.BBS door information file. ------------------------------------------------------------------------------- user_downk unsigned int od_control.user_downk; This variable contains the total kilobytes of files that the current user has downloaded from the BBS, and is available under systems that produce EXITINFO.BBS, Wildcat style DOOR.SYS or SFDOORS.DAT format door information files. ------------------------------------------------------------------------------- user unsigned int od_control.user_downlimit; _downlimit This variable contains the total number of kilobytes that the caller is permitted to download during this call. If your door allows files do be downloaded, you will probably want to compare the value of this variable to the size of any file to be transferred and the total kilobytes already downloaded, as stored in the od_control.user_todayk variable. This variable is only available under systems that produce an EXITINFO.BBS file. =============================================================================== OpenDoors 5.00 Manual End of Page 166 ------------------------------------------------------------------------------- user unsigned int od_control.user_downloads; _downloads This variable contains the total number of files that the current user has downloaded from the BBS, and is available under systems that produce EXITINFO.BBS, PC-Board/GAP style DOOR.SYS, WildCat style DOOR.SYS or SFDOORS.DAT format door information files. ------------------------------------------------------------------------------- user_echo char od_control.user_echomailentered; mailentered This variable is a Boolean value, indicating whether or not the user has entered new EchoMail during this call. If this variable has a value of TRUE, then EchoMail has been entered, and if it has a value of FALSE, then EchoMail has not been entered. This variable will contain a valid value only after od_init() or some OpenDoors function has been called. Any changes made to this variable will be reflected within the BBS software when control is returned to the BBS. This variable is accessible only under systems which produce an EXITINFO.BBS door information file. ------------------------------------------------------------------------------- user_error char od_control.user_error_free; _free This variable contains a Boolean value indicating whether or not the user is connected to the BBS via an error free connection (eg. a V.42/MNP or similar modem protocol). This variable is only available under systems that produce an SFDOORS.DAT, Wildcat style DOOR.SYS or RA 1.00 or later style extended EXITINFO.BBS door information file. ------------------------------------------------------------------------------- user_first char od_control.user_firstcall[9]; call This variable is a string which contains the date of the user's first call, in the same format as the od_control. user_lastcall variable. This variable is only available under systems which produce an RA 1.00 and later style extended EXITINFO.BBS door information file. ------------------------------------------------------------------------------- user_ unsigned char od_control.user_flags[4]; flags The od_control.user_flags variable is an array of four sysop defined bit-mapped flags, which represent some sort of =============================================================================== OpenDoors 5.00 Manual End of Page 167 information about the user. od_control.user_flags[0] stores flags A1 - A8 in bits 0 through 7, respectively. Likewise, od_control.user_flags[1] stores flags B1 - B8, and so on. This variable is only available under systems that produce EXITINFO.BBS format door information files. ------------------------------------------------------------------------------- user_handle char od_control.user_handle[36]; This variable contains the user's alias or handle name, if any. If the user does not have and alias or handle, this variable will be blank. This variable is only available under systems that produce a CHAIN.TXT, RA 1.00 and later extended EXITINFO.BBS or Wildcat style DOOR.SYS door information file. ------------------------------------------------------------------------------- user_ char od_control.user_homephone[13]; homephone This string contains the user's home or data phone number, if available. This value is only available under system that produce one of the following door information files: EXITINFO.BBS, PC-Board/GAP style DOOR.SYS, WildCat style DOOR.SYS or SFDOORS.DAT. ------------------------------------------------------------------------------- user unsigned char od_control.user_last_pwdchange; _last _pwdchange This variable contains the number of calls that the user has made since they last changed their password. This variable is only available under EXITINFO.BBS files. ------------------------------------------------------------------------------- user char od_control.user_lastdate[9]; _lastdate This variable is a string containing the date of the user's last call to the BBS, and should always be of the format: "MM-DD-YY" Where MM is two digits representing the number of the month of the user's call, with 1 being January, 2 being February, and so on. DD should be two digits representing the day of the month of the user's last call, beginning with 1, and MM should be the last two digits of the year of the user's last call. =============================================================================== OpenDoors 5.00 Manual End of Page 168 This variable is only available under systems that produce one of the following door information files: CHAIN.TXT, EXITINFO.BBS, PC-Board/GAP style DOOR.SYS or WildCat style DOOR.SYS files. ------------------------------------------------------------------------------- user_ unsigned int od_control.user_lastread; lastread This variable contains the number of the highest message number that the user has read, and is only available under EXITINFO.BBS format door information files. ------------------------------------------------------------------------------- user char od_control.user_lasttime[6]; _lasttime This variable contains a string representing the time of the user's last call to the BBS, and should always be of the format: "HH:MM" Where HH is two digits representing the 24-hour format hour of the user's last call, and MM is two digits representing the minute of the user's last call. Thus, the following strings would be valid entries for this string: "00:01" (12:01 am) "03:47" (3:47 am) "18:20" (6:20 pm) This variable is only available under systems that produce an EXITINFO.BBS or Wildcat style DOOR.SYS format door information file. ------------------------------------------------------------------------------- user char od_control.user_location[26]; _location This string contains the name of the location from which the current user is calling from. This will usually be the name of the city, region (province, state, etc.) and sometimes country where the user lives. The contents of this variable are displayed on the OpenDoors status line. The value of this variable is valid after od_init() or any other OpenDoors function has been called. Also, you may change the value of this variable if you wish. However, not that these changes may not immediately be reflected in the status line, and may or may not cause the setting to be changed after the user returns to the BBS. This variable is available under systems that produce one of the following door information files: DORINFO?.DEF, =============================================================================== OpenDoors 5.00 Manual End of Page 169 EXITINFO.BBS, PC-Board/GAP style DOOR.SYS, WildCat style DOOR.SYS SFDOORS.DAT and CALLINFO.BBS, but is not available under CHAIN.TXT or DoorWay style DOOR.SYS files. ------------------------------------------------------------------------------- user char od_control.caller_logindate[9]; _logindate This variable contains a string representing the date on which the current call to the BBS began. This variable is in the same format as the od_control.user_lastdate variable, described below. This variable is only available under systems which produce an EXITINFO.BBS file. ------------------------------------------------------------------------------- user long od_control.user_loginsec; _loginsec This variable contains the user's security at login, and can be used to detect changes by the sysop or other programs during the course of the call, by comparing it's value with the od_control.user_security variable. This variable is only available under systems which produce an EXITINFO.BBS file. ------------------------------------------------------------------------------- user char od_control.user_logintime[6]; _logintime This variable contains a string representing the time of day at which the current call to the BBS began. This variable is in the same format as the od_control.user_lasttime variable, which is also described below. This variable is available under systems which produce an EXITINFO.BBS, a Wildcat style DOOR.SYS, or an SFDOORS.DAT file. ------------------------------------------------------------------------------- user char od_control.user_logonpassword[16]; _logon password This variable is a string which contains the user's password at the time at which the current call to the BBS began. This variable can be used to detect changes by the sysop or other programs to the user's password, which have taken place during the course of the call. In order to detect such changes, simply compare the contents of this string with the contents of the od_control.user_password variable. This variable is only available under systems which produce an EXITINFO.BBS format door information file. =============================================================================== OpenDoors 5.00 Manual End of Page 170 ------------------------------------------------------------------------------- user char od_control.user_menustack[50][9]; _menustack This variable is an array of 50 strings, containing the stack of BBS menus that have been executed, and is used to record the current position of the user within the BBS's menu system. Each string contains just the base portion of the filename of the menu, without the extension. The od_control.ra_menustackpointer variable points to the top of the menu stack. However, a complete discussion of the menu stack is beyond the scope of this manual. This variable is only available under systems that produce an RA 1.00 and later style extended EXITINFO.BBS door information file. ------------------------------------------------------------------------------- user unsigned char od_control.user_menustackpointer; _menustack pointer This variable points to the top of the current menu stack. For more information on the menu stack, please refer to the od_control.ra_menustack variable, above. This variable is only available under systems that produce an RA 1.00 and later style extended EXITINFO.BBS door information file. ------------------------------------------------------------------------------- user unsigned int od_control.user_messages; _messages This variable contains a value representing the total number of messages that have been written by the user, and is available under EXITINFO.BBS or Wildcat style DOOR.SYS format door information files. ------------------------------------------------------------------------------- user_name char od_control.user_name[36]; This string contains the name of the user that is currently on- line, and is used by OpenDoors to display the current user name on the status line, and will most likely be used by your door for differentiating among different users. In most cases, you should probably not change the value of this variable, as a user's name does not usually change, and doing so could results in problems when returning to some BBS systems. For an example of using this variable, see the EZVote example program. This variable is available under all BBS systems. =============================================================================== OpenDoors 5.00 Manual End of Page 171 ------------------------------------------------------------------------------- user_net_ unsigned int od_control.user_net_credit; credit This variable contains the amount of NetMail credit that the current user has to his or her name. This variable is only available under systems that produce an EXITINFO.BBS file. Note that if you wish to change the value of the user's remaining NetMail credit, you should use the od_control. user_credit variable, instead of this variable. ------------------------------------------------------------------------------- user_net char od_control.user_netmailentered; mailentered This variable is a Boolean value, indicating whether or not the user has entered new NetMail or GroupMail during this call. If this variable has a value of TRUE, then NetMail/GroupMail has been entered, and if it has a value of FALSE, then NetMail/GroupMail has not been entered. This variable will contain a valid value only after od_init() or some OpenDoors function has been called. Any changes made to this variable will be reflected within the BBS software when control is returned to the BBS. This variable is accessible only under systems which produce an EXITINFO.BBS door information file. ------------------------------------------------------------------------------- user_num unsigned int od_control.user_num; This variable contains the number of the user's record in the user database file, where 0 is the first record. This can be useful for changing user settings that are not re-read by the BBS, such as the user's phone number or security level which might be altered by a call back verification door. However, the value of this variable itself should not be altered. This variable is available under systems which produce any of the following door information file formats: CHAIN.TXT, PC- Board/GAP style DOOR.SYS, Wildcat style DOOR.SYS SFDOORS.DAT and EXITINFO.BBS. ------------------------------------------------------------------------------- user_ unsigned int od_control.user_numcalls; numcalls This variable contains the total number of calls that the current user has placed to the BBS, and is available under systems that produce EXITINFO.BBS or PC-Board/GAP and Wildcat style DOOR.SYS door information files. =============================================================================== OpenDoors 5.00 Manual End of Page 172 ------------------------------------------------------------------------------- user unsigned int od_control.user_numpages; _numpages The value of this variable contains the total number of times that the user has paged the sysop, and can be used to limit the number of times that the user is permitted to page the sysop. OpenDoors increments this variable every time that the user pages the sysop, via the od_page() function. This variable is used with all types of door information files. However, this variable will only reflect the value within the BBS if an EXITINFO.BBS file is produced. Otherwise, the variable will only contain the number of times that the user has paged within the door, but not the total number of times the user has paged. Under EXITINFO.BBS systems, changes to the value of this variable will be reflected within the BBS upon return by the DOOR. ------------------------------------------------------------------------------- user char od_control.user_password[16]; _password This variable contains the user's password for accessing the BBS. OpenDoors does not use this value itself. This variable will contain a valid value only after od_init() or some OpenDoors function has been called. You may change the value of this variable. Note, however, that changes in this variable may or may not cause the setting to be changed when control returns to the BBS - this will depend upon the particular BBS system your door is running under. This variable is only available under systems that produce one of the following door information files: EXITINFO.BBS, PC-Board/GAP and Wildcat style DOOR.SYS, SFDOORS.DAT, and CALLINFO.BBS. ------------------------------------------------------------------------------- user_pending unsigned int od_control.user_pending; This variable represents the total value of NetMail that has been written by the current user, but not yet exported from the message base. This variable is only available under systems that produce an EXITINFO.BBS door information file. ------------------------------------------------------------------------------- user_reason char od_control.user_reasonforchat[78]; forchat This variable is a string, containing the reason for which the user wishes to chat with the sysop, as they entered at the time of paging the sysop. This variable will contain an empty string =============================================================================== OpenDoors 5.00 Manual End of Page 173 if the user has not paged the sysop, or if the reason the user wishes to chat is unknown. See also the od_control.user_wantchat variable. This variable is available under all BBS systems, regardless of what style of door information file they produce. However, this variable will not be passed between the door and BBS, and thus the user's reason for chat within the door will not necessarily correspond to their reason for chat outside the door. ------------------------------------------------------------------------------- user_rip char user_rip; This variable is set to TRUE if the user has RIP (Remote Imaging Protocol) graphics enabled, and FALSE if they do not. This setting can be determined from the door information (drop) file in many cases. In other cases, you can automatically determine whether or not the user's system supports RIP graphics using the od_autodetect() function (see page 48). ------------------------------------------------------------------------------- user unsigned int od_control.user_screen_length; _screen _length This value of this variable represents the total number of lines that can be displayed on the user's screen at once, and is usually either 24 or 25. You may wish to make use of this variable to allow your door to pause the display of long pieces of text after every screen length, in order to allow the user to read this information before it passes off of their screen. In this case, you would simply maintain a counter of the total number of lines displayed, and when this value reaches one less than the length of the user screen, display a prompt asking the user to whether or not they wish to continue. This variable is set to the user's setting within the BBS under systems that produce any of the following door information file formats: CHAIN.TXT, EXITINFO.BBS, PC-Board/GAP and Wildcat style DOOR.SYS and CALLINFO.BBS files. This variable is used by the OpenDoors function, od_list_files(). If this variable contains a valid value, OpenDoors will pause the listing of files after every screen, and give the user the option of continuing, aborting, or disabling the "Continue?" prompt for the rest of the file listing. Thus, if you are using the od_list_files() under a system that does not produce one of the door information files listed above, you may wish to obtain the user's screen length from the user themselves. If the screen length is not available from the particular type of door information file that is found, and you do not set this value yourself, this variable will default to 23. If you are going to set the value of this =============================================================================== OpenDoors 5.00 Manual End of Page 174 variable yourself, you should do so after having called od_init() or some OpenDoors function. ------------------------------------------------------------------------------- user_ unsigned char od_control.user_screenwidth; screenwidth This variable contains a value representing the width of the user's screen, and will most often be equal to 80. This variable is only available under systems that produce a CHAIN.TXT or RA 1.00 and later style extended EXITINFO.BBS door information file. ------------------------------------------------------------------------------- user unsigned int od_control.user_security; _security This variable contains a numerical value representing the user's security access level on the BBS. You may wish to use this value to determine whether or not the current user of your door should have access to certain sysop-only functions. In this case, you may wish to have a configuration file used by your door, in which the sysop may define the minimum security level for sysop access. You would then be able to compare this configuration setting to the security level stored in this variable, in order to determine whether or not sysop function should be available. An alternative method, used by the EZVote sample door, of determining whether or not the current user is the sysop is to compare the user's name with the value of the od_control.sysop_name variable. This method has the advantage of not requiring a configuration program, but the disadvantage that the door will not function correctly under all BBS systems, as the od_control.sysop_name variable is not available under all BBS systems. The od_control.user_security variable is available under BBS systems that produce any of the following door information file formats: CHAIN.TXT, EXITINFO.BBS, PC-Board/GAP and Wildcat style DOOR.SYS, SFDOORS.DAT or CALLINFO.BBS. ------------------------------------------------------------------------------- user_sex char od_control.user_sex; This variable contains a single character representing the gender of the user that is currently online. This variable will contain an upper-case 'F' if the user is female, and an upper- case 'M' if the user is male. This variable is only available under systems that produce a CHAIN.TXT file. =============================================================================== OpenDoors 5.00 Manual End of Page 175 ------------------------------------------------------------------------------- user_subdate char od_control.user_subdate[9]; This variable is a string, in the same format as the od_control.user_lastdate variable, which stores the date of expiry of the user's subscription to the BBS. This variable is only available under systems which produce a PC-Board/GAP and Wildcat style DOOR.SYS or RA 1.00 and later style extended EXITINFO.BBS door information file. ------------------------------------------------------------------------------- user int od_control.user_timelimit; _timelimit This variable contains the amount of time, in minutes, that the user has left in the door. Note that this value may or may not be equal to the total amount of time that the user has left on the BBS, depending upon whether the BBS or a third-party door manager program only allows a limited amount of time in this door. This variable contains a valid value after od_init() or some OpenDoors function has been called. OpenDoors uses this variable to keep track of how much time the user has left in the door, and will automatically warn the user when nearly all of his or her time has been used up. OpenDoors will also force the user out of the door when their time in the door has expired. OpenDoors automatically subtracts one minute from this variable every minute that OpenDoors is active, unless chat mode has been activated (in which case the user's time will freeze), and also adjusts the value of this variable when the sysop uses the time adjustment function keys. Hence, you will not normally have any need to alter the value of this variable yourself. However, there may be some cases in which you wish to subtract a penalty or add a bonus to the user's time, such as in a "timebank" door or a door game that permits the user to "gamble time". Depending on which BBS system your door is running under, the value of this variable may or may not effect the user's time left upon return to the BBS. The BBS system will either reset the user's time to the value re-written to the door information file (this variable), or will always subtract the amount of time spent in the door from the user's remaining time. Other BBS systems, such as Apex, give the sysop an option of which means should be used. This variable is available under all door information file formats. =============================================================================== OpenDoors 5.00 Manual End of Page 176 ------------------------------------------------------------------------------- user unsigned int od_control.user_todayk; _todayk This variable contains the total kilobytes of files that the current user has downloaded from the BBS during the current day, and is available under systems that produce EXITINFO.BBS, PC- Board/GAP and Wildcat style DOOR.SYS, or SFDOORS.DAT format door information files. ------------------------------------------------------------------------------- user_upk unsigned int od_control.user_upk; This variable contains the total kilobytes of files that the current user has uploaded to the BBS, and is available under systems that produce EXITINFO.BBS, Wildcat style DOOR.SYS or SFDOORS.DAT files. ------------------------------------------------------------------------------- user_uploads unsigned int od_control.user_uploads; This variable contains the total number of files that the current user has uploaded to the BBS, and is available under systems that produce EXITINFO.BBS, PC-Board/GAP and Wildcat style DOOR.SYS, or SFDOORS.DAT format door information files. ------------------------------------------------------------------------------- user char od_control.user_wantchat; _wantchat This variable is a Boolean value which indicates whether or not the user wishes to chat with the sysop (ie, the user has paged the sysop, but has yet to receive a chat with the sysop). This variable is used under all door information file formats. However, changes to this variable are only reflected on the BBS when the door is running under a system that produces an EXITINFO.BBS door information file. This variable is automatically turned on (ie., set to TRUE), when the user begins to page the sysop for chat, within the od_page() function, and is automatically turned off (ie., set to FALSE), when the sysop breaks in for chat via the chat function key. Also, setting this variable to TRUE will turn on the flashing want-chat indicator on the OpenDoors status line. =============================================================================== OpenDoors 5.00 Manual End of Page 177 ------------------------------------------------------------------------------- user unsigned int od_control.user_xi_record; _xi_record This variable contains the number of the user's record in the USERXI.BBS file, if any. This variable is only available under system that produce a Remote Access 1.00 and later style extended door information file. =============================================================================== OpenDoors 5.00 Manual End of Page 178 CONTROL STRUCTURE - DOOR SETTINGS ------------------------------------------------------------------------------- This section deals with those variables in the OpenDoors control structure which reflect the current door settings. These variables are as follows: od_cur_attrib The current display attribute, or -1 if unknown. od_okaytopage Controls whether the user is currently permitted to page the sysop. od_pageendmin End of valid paging hours. od_pagestartmin Start of valid paging hours. od_user_keyboard_on Controls whether OpenDoors will currently accept input from the remote user's keyboard. od_update_stauts_now Forces immediate update of the status line. sysop_next Indicates whether or not the sysop has reserved use of the system after the current calls. ------------------------------------------------------------------------------- od_cur int od_control.od_cur_attrib; _attrib This read-only values stores the current display colour attribute, or the value -1 if the current display colour is unknown (such as when the door first begins execution). ------------------------------------------------------------------------------- od char od_control.od_okaytopage; _okaytopage This variable allows you to control whether or not the user is currently permitted to page the sysop via the od_page() function. This variable contains one of three values. A value equal to TRUE indicates that paging is currently permitted. A value equal to FALSE indicates that paging is not current permitted. A value of MAYBE indicates that the od_page() function should check the values of the od_pagestartmin and od_pageendmin variables in order to determine whether or not =============================================================================== OpenDoors 5.00 Manual End of Page 179 paging should be permitted. If you wish to always permit sysop paging, you can simply leave this variable set at its default value of TRUE. On the other hand, you may wish to allow the sysop to configure paging hours - either within your own configuration program, or within the BBS's configuration. In this case, you can either turn paging on and off manually by changing the value of this variable, or by setting this variable to MAYBE, and using the od_pagestartmin and od_pageendmin variables. These two variables are described below. For more information on the od_page() function itself, see page 101. ------------------------------------------------------------------------------- od unsigned int od_control.od_pageendmin; _pageendmin This variable can be used to set the beginning of valid sysop paging hours within the od_page() function. If the od_control.od_okaytopage variable (which is described above) is set to MAYBE, then OpenDoors will check the value of this variable prior to paging the sysop via the od_page() function. This variable should contain the time at which the valid sysop paging hours end, represented as the a number of minutes since midnight. For more information on the od_page() function itself, see page 101. ------------------------------------------------------------------------------- od unsigned int od_control.od_pagestartmin; _pagestartmin This variable can be used to set the beginning of valid sysop paging hours within the od_page() function. If the od_control.od_okaytopage variable (which is described above) is set to MAYBE, then OpenDoors will check the value of this variable prior to paging the sysop via the od_page() function. This variable should contain the time at which the valid sysop paging hours begin, represented as the a number of minutes since midnight. For more information on the od_page() function itself, see page 101. ------------------------------------------------------------------------------- od_update char od_control.od_update_status_now; _status_now Setting this variable to TRUE forces OpenDoors to update the status line during the next od_kernel() execution. When the status line is updated, this variable is reset to its default value of FALSE. =============================================================================== OpenDoors 5.00 Manual End of Page 180 ------------------------------------------------------------------------------- od_user char od_control.od_user_keyboard_on; _keyboard_on This variable is a Boolean value, indicating whether OpenDoors will currently accept input from a remote user. OpenDoors provides a function key (usually [ALT]-[K], unless you have changed the default), which will allow the sysop to temporarily prevent the user from having any control over the door. When the sysop activates this feature, a flashing [Keyboard-Off] indicator will appear on the status line, and this variable will be set to FALSE. When the sysop presses the [ALT]-[K] combination a second time, to toggle the user's keyboard back on, the flashing indicator will disappear, and this variable will be set back to TRUE. ------------------------------------------------------------------------------- sysop_next char od_control.sysop_next; This variable is a Boolean value, indicating whether or not the "sysop next" feature has been activated. The "sysop next" feature, which reserves the system for the sysop after the call has ended, can be toggled on and off within OpenDoors by use of a function key (Alt-N by default). Also, when the "sysop next" feature has been activated, an indicator will appear on the OpenDoors status line. This variable is only available under systems that produce an SFDOORS.DAT or RA 1.00 and later style extended EXITINFO.BBS door information file. For more information on testing the type of door information file available, please see page 156. =============================================================================== OpenDoors 5.00 Manual End of Page 181 CONTROL STRUCTURE - DIAGNOSTICS ------------------------------------------------------------------------------- To help in diagnosing problems in your OpenDoors programs, OpenDoors stores information on the most recent error which occurred. When any of the OpenDoors functions return an "error" or "failure" state, the reason for this failure is recorded. The following OpenDoors control structure variable provides diagnostics information: od_error Stores a "reason code" for the last failed OpenDoors API function call. ------------------------------------------------------------------------------- od_error int od_control.od_error; When any of the OpenDoors API functions return an "error" or "failure" state (usually denoted by either of the values FALSE or NULL), the reason for the failure is recorded in this variable. Since successful function calls do not alter the value of the od_control.od_error variable, you must be careful not only to check the value of the od_control.od_error variable, but also to check the OpenDoors function return codes, in order to determine which function failed. This variable will always store the reason for the most recent function call failure, or ERR_NONE if no functions have failed. od_error may take on any of the following values: ERR_NONE Indicates that no error has occurred yet. ERR_MEMORY Function was unable to allocate required memory. This usually indicates that there is not enough available memory. This failure may also be due to memory corruption caused by your program inadvertently overwriting heap structures. If your program has been compiled in either the small or the medium memory model, try recompiling it in the compact, large, or huge memory models. If your program is already compiled in the compact, large, or huge memory models, try making more system memory available to your program. =============================================================================== OpenDoors 5.00 Manual End of Page 182 ERR_NOGRAPHICS This setting indicates that the function called requires ANSI, AVATAR or RIP graphics mode, but none of these modes are active. ERR_PARAMETER An invalid parameter was passed to an OpenDoors functions. Check the function's description in chapter four, to determine the required values for each function parameter. ERR_FILEOPEN OpenDoors was unable to open a file. This can be due to the specified filename not existing, due to the file being locked for exclusive access by another process, or due to a hardware failure. ERR_FILEREAD OpenDoors was able to open the specified file, but unable to read the required data from the file. This error may be due to an invalid file format, due to a portion of the file being locked by another process, or due to a hardware failure. ERR_LIMIT An internal function limit has been exceeded. Refer to the function's description in chapter four for information on the function's limitations. ERR_NOREMOTE Indicates that a function has been called which is not valid in local mode, such as od_carrier() or od_set_dtr(). =============================================================================== OpenDoors 5.00 Manual End of Page 183 CONTROL STRUCTURE - OPENDOORS CUSTOMIZATION ------------------------------------------------------------------------------- The OpenDoors control structure provides many variables which allow you to customize OpenDoor's behavior and appearance. These customization variables fit into one of the following categories: General Behavior Customization Variables Sysop Function Keys Customization Variables Colour Customization Variables Language-Specific Prompts Customization Variables This section deals with those variables that fit into the first category, "General Behavior Customization Variables". The other categories are dealt with in the following sections of this chapter. Below is a brief overview of the variables grouped into this section of the OpenDoors control structure. Following the overview is a detailed description of each of these variables. od_box_chars Array of characters used by the od_draw_box() function. od_before_exit Function to call prior to exiting. od_cafter_chat Function to call after sysop chat. od_cafter_shell Function to call after DOS shell. od_cbefore_chat Function to call prior to sysop chat. od_cbefore_shell Function to call prior to DOS shell. od_cfg_lines Sets the configuration file's custom door information file line keywords. od_cfg_text Sets the built-in log file keywords that OpenDoors will recongize. od_chat_active Controls whether or not sysop chat mode is active. od_clear_on_exit Controls whether the screen is cleared upon door exit. =============================================================================== OpenDoors 5.00 Manual End of Page 184 od_colour_delimiter Indicates what character should delimit imbedded colour codes for the od_printf() function. od_colour_names Strings which OpenDoors recognizes as the names of various text colours. od_config_file Used to enable or disable the OpenDoors configuration file system. od_config_filename Sets the filename that will be read by the configuration file system. od_config_function The callback function that OpenDoors will call to allow your program to process custom configuration file entries. od_default_personality Sets the default personality to be used with the OpenDoors Multiple Personality System, and also sets the personality to use when the MPS is not active. od_default_rip_win Whether OpenDoors should use the default 43-line RIP window for ANSI text (TRUE), or a 23-line window (FALSE). od_disable Disable OpenDoors activities such as reading door information file and monitoring carrier detect / remaining time. od_errorlevel Sets the errorlevel OpenDoors exits with under various conditions. od_force_local Forces door to operate in local mode, ignoring any door information file and using default user settings. od_in_buf_size Sets size of OpenDoor's internal local/remote inbound buffer. od_inactive_warning Number of seconds before hanging up that OpenDoors displays the inactivity timeout warning. od_inactivity Controls user inactivity timeout. od_ker_exec Is called whenever od_kernel() executes. =============================================================================== OpenDoors 5.00 Manual End of Page 185 od_last_input Indicates whether the last input came from the remote user (==0) or the local sysop (==1). od_list_pause Controls whether or not the user may pause display within the od_list_files() and od_send_file() functions by using the [P] key. od_list_stop Controls whether or not the user may terminate display within the od_list_files() and od_send_file() functions using [S], [CTRL]-[K], etc. od_logfile Enables or disables the OpenDoors log file system. od_logfile_disable Prevents the logfile from being opened, even if the logfile is enabled by od_logfile. od_logfile_messages Array of message strings that OpenDoors will use when writing log file entries. od_logfile_name Contains the filename and possibly path of the logfile. od_maxtime Indicates the maximum length of time any user is permitted to use the door. od_maxtime_deduction Indicates the amount of time that has temporarily been taken away from the user's remaining time, as a result of the maximum door time settting. od_mps Enables or disables the OpenDoors Multiple Personality System. od_no_file_func Called when no door information file can be read. od_no_ra_codes Disables translation of RA/QBBS control codes. od_nocopyright Prevents OpenDoors from displaying it's name and version number when a door program begins execution. od_noexit Prevents OpenDoors from exiting when the od_exit() function is called. od_page_len Controls length of the sysop page beep. =============================================================================== OpenDoors 5.00 Manual End of Page 186 od_page_pausing Enables or disables page pausing in od_send_file(), od_hotkey_menu() and od_list_files() functions. od_page_startmin Indicates the time of day at which sysop paging is first enabled. od_page_statusline Which status line (if any) is activated when the user pages the sysop. od_page_endmin Indicates the time of day at which sysop paging is disabled. od_prog_name Stores the name of your program, which will be written to the log file. od_reg_key Stores the registration key that you receive when purchasing OpenDoors. od_reg_name Stores your name or your companies name when you have purchased an OpenDoors licence (registration). od_spawn_freeze_time Indicates whether the user's time remaining continues to be decreased during the execution of the od_spawn...() functions (FALSE), or if the timer should be "frozen" (TRUE). od_swapping_disable Disables swapping during DOS shell and od_spawn...() functions. od_swapping_noems Prevents swapping form being done to EMS expanded memory. od_swapping_path Location where disk swap file should be created. od_status_on Controls whether the status line sub- system is active. od_time_msg_func Called instead of displaying time limit warning messages. ------------------------------------------------------------------------------- od_box char od_control.od_box_chars[8]; _chars This variable allows you to specify which character the od_draw_box() function uses in drawing the boarder of a window. The elements of this array are as follows: =============================================================================== OpenDoors 5.00 Manual End of Page 187 od_box_chars[BOX_UPPERLEFT] - Upper left corner of box od_box_chars[BOX_TOP] - Top horizontal line od_box_chars[BOX_UPPERRIGHT] - Upper right corner of box od_box_chars[BOX_LEFT] - Left Vertical line od_box_chars[BOX_LOWERLEFT] - Lower left corner of box od_box_chars[BOX_LOWERRIGHT] - Lower right corner of box od_box_chars[BOX_BOTTOM] - Bottom horizontal line od_box_chars[BOX_RIGHT] - Right horizontal line ------------------------------------------------------------------------------- od_before void (*od_control.od_before_exit)(); _exit This variable contains a pointer to a function which OpenDoors should call prior to exiting, or NULL if you do not wish to have any function called at exit time. For an example of the use of this variable, see the description of the EZVote demo door, which begins on page 38. ------------------------------------------------------------------------------- od_cafter void (*od_control.od_cafter_chat)(); _chat The function pointed to by this variable will be called after sysop chat mode has ended. This may be useful for allowing you to save the user's screen contents prior to chat, and restoring the afterwards. If this variable contains its default value of NULL, no function will be called. To alter the string of text which is displayed after sysop chat, see the od_control.od_after_chat variable, which is described in the section on the prompts customization portion of the control structure. ------------------------------------------------------------------------------- od_cafter void (*od_control.od_cafter_shell)(); _shell The function pointed to by this variable will be called after the sysop has returned from a DOS shell. If this variable contains its default value of NULL, no function will be called. To alter the string of text which is displayed after a DOS shell, see the od_control.od_after_shell variable, which is described in the section on the prompts customization portion of the control structure. =============================================================================== OpenDoors 5.00 Manual End of Page 188 ------------------------------------------------------------------------------- od_cbefore void (*od_control.od_cbefore_chat)(); _chat The function pointed to by this variable will be called prior to entering sysop chat mode. This may be useful for allowing you to save the user's screen contents prior to chat, and restoring the afterwards. If this variable contains its default value of NULL, no function will be called. To alter the string of text which is displayed prior to sysop chat, see the od_control.od_before_chat variable, which is described in the section on the prompts customization portion of the control structure. To replace the OpenDoors sysop chat facility with your own, simply activate your chat mode when this function is called. Your chat mode facility should remain active until OpenDoors sets the od_control.od_chat_active variable to FALSE. If you wish to terminate chat mode prior to this variable being set to FALSE, you should set this variable to FALSE yourself if you do not wish OpenDoors to activate its own chat mode. ------------------------------------------------------------------------------- od_cbefore void (*od_control.od_cbefore_shell)(); _shell The function pointed to by this variable will be called prior to executing a sysop DOS shell. If this variable contains its default value of NULL, no function will be called. To alter the string of text which is displayed before a DOS shell, see the od_control.od_before_shell variable, which is described in the section on the prompts customization portion of the control structure. ------------------------------------------------------------------------------- od_cfg_lines char od_control.cfg_lines[25][33]; This array contains the strings for the keywords that represent various lines in the definition of a custom door information file. Each keyword must be 32 character or less in length. These keywords are not case sensitive. See page 220 for more information on defining custom door information (drop) file formats. The default values for this array are as follows: [0] "Ignore" [1] "ComPort" [2] "FossilPort" [3] "ModemBPS" [4] "LocalMode" [5] "UserName" [6] "UserFirstName" [7] "UserLastName" [8] "Alias" [9] "HoursLeft" =============================================================================== OpenDoors 5.00 Manual End of Page 189 [10] "MinutesLeft" [11] "SecondsLeft" [12] "ANSI" [13] "AVATAR" [14] "PagePausing" [15] "ScreenLength" [16] "ScreenClearing" [17] "Security" [18] "City" [19] "Node" [20] "SysopName" [21] "SysopFirstName" [22] "SysopLastName" [23] "SystemName" "RIP" [24] If you wish to change any of these variable, you must do so before calling any OpenDoors functions. ------------------------------------------------------------------------------- od_cfg_text char od_control.od_cfg_text[47][33]; This array of strings contains the built-in configuration file keywords that are recognized by OpenDoors. These keywords may be up to 32 characters in size, and are not case sensitive. If you wish to change any of these settings, you must do so before calling any OpenDoors functions. The default values for this array are as follows: [0] "Node" [1] "BBSDir" [2] "DoorDir" [3] "LogFileName" [4] "DisableLogging" [5] "SundayPagingHours" [6] "MondayPagingHours" [7] "TuesdayPagingHours" [8] "WednesdayPagingHours" [9] "ThursdayPagingHours" [10] "FridayPagingHours" [11] "SaturdayPagingHours" [12] "MaximumDoorTime" [13] "SysopName" [14] "SystemName" [15] "SwappingDisable" [16] "SwappingDir" [17] "SwappingNoEMS" [18] "LockedBPS" [19] "SerialPort" [20] "CustomFileName" [21] "CustomFileLine" [22] "InactivityTimeout" =============================================================================== OpenDoors 5.00 Manual End of Page 190 [23] "PageDuration" [24] "ChatUserColour" [25] "ChatSysopColour" [26] "FileListTitleColour" [27] "FileListNameColour" [28] "FileListSizeColour" [29] "FileListDescriptionColour" [30] "FileListOfflineColour" [31] "Personality" [32] "NoFossil" [33] "PortAddress" [34] "PortIRQ" [35] "ReceiveBuffer" [36] "TransmitBuffer" [37] "PagePromptColour" [38] "LocalMode" [39] "PopupMenuTitleColour" [40] "PopupMenuBorderColour" [41] "PopupMenuTextColour" [42] "PopupMenuKeyColour" [43] "PopupMenuHighlightColour" [44] "PopupMenuHighKeyColour" [45] "NoFIFO" [46] "FIFOTriggerSize" ------------------------------------------------------------------------------- od_chat char od_control.od_chat_active; _active This variable is set to TRUE when sysop chat mode is active, and is set to FALSE when sysop chat mode is not active. This variable can be used to determine whether or not chat mode is active, and to force chat mode to end. When the sysop presses the chat mode key ([ALT]-[C] if the default personality is being used) while chat mode is active, this variable is set to FALSE. ------------------------------------------------------------------------------- od_clear char od_control.od_clear_on_exit; _on_exit This variable contains a Boolean value, which indicates whether or not you wish OpenDoors to clear the screen prior to exiting. This variable defaults to a value of TRUE, which causes the screen to be cleared when a door program exits. However, you may wish to set this variable to a value of FALSE, which will cause the contents of the screen to remain unchanged when the door exits. While setting this variable to FALSE will probably result in a messy display if the door is to return control to a batch file, if the door returns directly to the BBS, it will result in a smoother transition from the door back to the BBS (as the sysop is not left with a blank screen). If your door has a configuration file or configuration program, you may wish to =============================================================================== OpenDoors 5.00 Manual End of Page 191 have an option which will allow the individual sysop to determine whether or not the screen should be cleared when the door exits. ------------------------------------------------------------------------------- od_colour char od_control.od_colour_delimiter; _delimiter This variable sets the character that is used to delimit colour codes in the od_printf() function, and defaults to the back- quote (`) character. If you wish to be able to display the back- quote (`) character using the od_printf() function, and thus wish to use a different character to delimit colour codes in the od_printf() function, simply set this variable to the alternative character you wish to use. If you wish to disable the imbedded colour codes feature of the od_printf() function, simply set this variable to a value of zero. For more information on od_printf() imbedded colour codes, see the description of the od_printf() function, which begins on page 105. ------------------------------------------------------------------------------- od_colour char od_control.od_colour_names[12][33]; _names This array sets the strings that OpenDoors will recognize as colour description keywords. These are the keywords that can be imbedded in od_printf() format strings, and are also the keywords that can be used to change colour settings in the OpenDoors configuration file. If you wish to change these keywords, you will normally do so before calling any OpenDoors functions. These keywords should always be supplied in upper- case characters. The defaults values for this array are as follows: [0] "BLACK" [1] "BLUE" [2] "GREEN" [3] "CYAN" [4] "RED" [5] "MAGENTA" [6] "YELLOW" [7] "WHITE" [8] "BROWN" [9] "GREY" [10] "BRIGHT" [11] "FLASHING" =============================================================================== OpenDoors 5.00 Manual End of Page 192 ------------------------------------------------------------------------------- od_config void (*od_control.od_config_file)(void); _file Set this variable to INCLUDE_CONFIG_FILE to enable the OpenDoors configuration file system, or set it to NO_CONFIG_FILE to disable the configuration file system. This variable should only be set prior to your first call to an OpenDoors function. For more information on the OpenDoors configuration file system, see page 215. ------------------------------------------------------------------------------- od_config char *od_control.od_config_filename; _filename If set, this variable should point to a string containing the filename that you wish the OpenDoors configuration file system to read. If this variable has its default value of NULL, the filename DOOR.CFG will be used by default. ------------------------------------------------------------------------------- od_config void (*od_control.od_config_function)(char *keyword, char _function *options); If set, this variable should point to the function that OpenDoors should call when lines with unrecognized keywords are encountered in the configuration file. This allows you to add your own configuration file keywords. The first parameter to this function will be a pointer to a string containing the unrecognized keywords, and the second parameter will be a pointer to a string containing any options that were specified after the keyword. If no options were specified after the keyword, this string will have a length of 0. ------------------------------------------------------------------------------- od_default void (*od_control.od_default_personality)(unsigned char _personality operation); This variable sets the default personality that OpenDoors will use if the multiple personality system is active. If the multiple personality system is not active, the personality set by this variable will be the only personality available. This variable should only be set prior to calling an OpenDoors function. This variable can be set to point to your own personality function, or it can be set to one of the manifest constants that represent one of the built-in personalities: PER_OPENDOORS PER_PCBOARD PER_RA =============================================================================== OpenDoors 5.00 Manual End of Page 193 PER_WILDCAT For more information on the OpenDoors Multiple Personality System, see page 220. ------------------------------------------------------------------------------- od_default char od_control.od_default_rip_win; _rip_win This variable defaults to FALSE. When set to FALSE, OpenDoors resets the RIP text window to a 23-line window that is most appropriate for doors that support both RIP-graphics and non-RIP mode. When this variable is set to TRUE, OpenDoors will use the default sized text output window, 43 lines in size. ------------------------------------------------------------------------------- od_disable unsigned int od_control.od_disable; This variable is a bit-mapped flag which can be used to disable certain OpenDoors features which are normally active, in order to allow for maximum customization of OpenDoors. Each bit of this variable represents a different feature that can be disabled. To DISABLE a feature, you set the bit that corresponds to the particular feature. To ENABLE the feature, the bit is reset. Each bit is represented by a keyword, as follows: DIS_INFOFILE - Setting the DIS_INFOFILE bit of the od_control.od_disable variable allows you to prevent OpenDoors from reading or re-writing a door information file. If you wish to disable OpenDoors' reading of the door information file, you must do so prior to calling od_init() or any other OpenDoors door-driver functions. At the same time, you must also manually set any required variables that are normally set by the information obtained from the door information file, such as the comm port number, baud rate, user name, and so on. You may wish to disable reading of the door information file in a number of cases. For example, you may wish to manually read another format of door information file not supported by OpenDoors, or to obtain the necessary door information from your program's command line. Also, if you are using OpenDoors to write a non-door communications program, such as a terminal program, you want to prevent OpenDoors from attempting to read a door information file on startup. DIS_CARRIERDETECT - Setting this bit allows you to prevent OpenDoors from exiting when it the carrier detect signal from the modem disappears. This bit may be set or rest at any time. If you use this bit to disable OpenDoors' carrier detection, you will probably want to monitor the state of =============================================================================== OpenDoors 5.00 Manual End of Page 194 the carrier detect signal yourself, using the od_carrier() function, which is described on page 51. DIS_TIMEOUT - This flag allows you to prevent OpenDoors from exiting when the user runs out of time. As with the DIS_CARRIERDETECT flag, you may set or reset this bit at any time. You will most often want to use this setting when writing a non-door program, which you would not want to have exit after a particular amount of time has elapsed. Be sure that you do not confuse this flag with the user's inactivity timeout. To disable the inactivity timeout, set the do_control.od_inactivity variable to 0. DIS_LOCAL_OVERRIDE - This setting affects OpenDoors' behavior when a locked BPS rate is specified in the configuration file, and another BPS rate is specified in the door information file. By default, OpenDoors will initialize the modem at the BPS rate specified in the configuration file, unless the BPS rate specified in the door information file is 0. In this case, the 0 BPS rate is used to indicate that the door is operating in local mode, and will override the BPS rate specified in the configuration file. Setting this flag disables the local mode override, causing the modem to always be initialized at the locked BPS rate, even when the door information file specifies that local mode should be used. DIS_BPS_SETTING - When used with a FOSSIL driver, OpenDoors normally changes the BPS rate to that passed from the BBS (if the BBS passes a valid FOSSIL BPS rate). Setting the DIS_BPS_SETTING flag disables this BPS rate setting. DIS_LOCAL_INPUT - The local keyboard may be disabled by setting this bit. This only affects the sysop's input in circumstances that input is also accepted from the remote user; this setting has no effect on the sysop function keys. Note that in order to disable the OpenDoors status line, the od_control.od_status_on variable is used, instead of the od_disable variable. You may also disable the user's inactivity timeout by setting the od_control.od_inactivity variable to 0. The od_control.od_status_on variable is described later in this section. ------------------------------------------------------------------------------- od unsigned char od_control.od_errorlevel[8]; _errorlevel Allows you to configure the errorlevel (program exit code) which OpenDoors exits with under various circumstances. The elements of this array are as follows: =============================================================================== OpenDoors 5.00 Manual End of Page 195 [ERRORLEVEL_ENABLE] Enables or disables custom errorlevels [ERRORLEVEL_CRITICAL] Critical error errorlevel [ERRORLEVEL_NOCARRIER] Carrier lost errorlevel [ERRORLEVEL_HANGUP] Sysop manually terminated call [ERRORLEVEL_TIMEOUT] User time expired errorlevel [ERRORLEVEL_INACTIVITY] Keyboard inactivity timeout errorlevel [ERRORLEVEL_DROPTOBBS] Sysop returned user to BBS errorlevel [ERRORLEVEL_NORMAL] Door has exited normally If you wish to override the default errorlevels used by OpenDoors, you should set element [ERRORLEVEL_ENABLE] of this array to TRUE, and set the remaining array elements to the appropriate errorlevels. Note that the settings in this array only affect the errorlevels which OpenDoors uses when it causes the door to exit for one of the reasons listed above. This setting has no effect on the errorlevel returned when your program explicitly exits by calling the od_exit() function, or your program returns by calling exit() or returning from the main() function. For a list of the default errorlevels used by OpenDoors, see page 33. ------------------------------------------------------------------------------- od char od_control.od_force_local; _force_local This variable defaults to FALSE, which causes OpenDoors to behave normally. When this variable is set to TRUE prior to calling od_init() or any other OpenDoors functions, OpenDoors will operate in local mode. In this case, no door information file will be read. Also, the user name will be used if od_control.user_name has not been set prior to calling od_init() or the first OpenDoors function. The default OpenDoors settings when od_control.od_force_local is set are as follows: - ANSI mode is on - Time limit is 60 minutes - User's location is the name of the BBS, or "Unknown Location" otherwise if BBS name is not known. - User name is set to sysop's name ("Sysop" if no sysop name is specified in the configuration file). You may wish to add a "-local" type parameter to your program's command line, which will permit the sysop to easily operate the door in local mode, as an interface to the od_control.od_force_local setting. =============================================================================== OpenDoors 5.00 Manual End of Page 196 ------------------------------------------------------------------------------- od_in_buf unsigned int od_control.od_in_buf_size; _size Specifies the size, in characters, of the OpenDoor's internal local/remote inbound buffer size. Two bytes of storage are required for each character in this buffer. This variable should only be changed prior to calling od_init() or the first OpenDoors function. If not set, this variable defaults to a value of 256. The buffer corresponding to this variable should not be confused with the FOSSIL or internal communications receive buffer (which is set by od_control.od_com_rx_buf). Unlike the serial I/O receive buffer, which is used only for characters received from the remote system, this buffer serves as a queue for input from both the remote system and the local keyboard. If you find that characters are lost when information is being set to your door from the user, you may wish to increase the size of this buffer. ------------------------------------------------------------------------------- od unsigned int od_control.od_inactivity; _inactivity OpenDoors has a built in user-inactivity timeout facility, which will automatically disconnect a user who appears .to be sleeping at the keyboard. If the user has not pressed any keys on their keyboard for to great a length of time, they will be warned that they are about to be disconnected due to inactivity. If they still do not respond after another few seconds, OpenDoors will automatically disconnect the user and return control to the BBS software. The od_control.od_inactivity variable allows you to set the maximum length of time, in seconds, after which the user will be disconnected for inactivity. This variable defaults to a value of 200 seconds. You may disable OpenDoors' inactivity timeout altogether, by setting the od_control.od_inactivity variable to a value of 0. ------------------------------------------------------------------------------- od_inactive int od_control.od_inactive_warning. _warning This variable sets the number of seconds prior to hanging up that OpenDoors displays the inactivity timeout warning. This variable should only be changed after your first call to an OpenDoors API function. If not explicitly set by your program, this setting defaults to 10 seconds. =============================================================================== OpenDoors 5.00 Manual End of Page 197 ------------------------------------------------------------------------------- od_ker_exec void (*od_control.od_ker_exec)(void); When od_control.od_ker_exec is set to point to a function, OpenDoors will call this function whenever od_kernel() executes. This provides any easy way for you to perform your own processing on a regular basis during door execution. The od_control.od_ker_exec variable defaults to NULL. ------------------------------------------------------------------------------- od_last char od_control.od_last_input; _input Indicates whether the last key retrieved using the od_get_key() function originated from the remote user, or the local sysop. If the input originated from the remote, this variable is set to 0. If the input originated from the local keyboard, this variables is set to 1. ------------------------------------------------------------------------------- od_list char od_control.od_list_pause; _pause This variable contains a Boolean value, which allows you to control whether or not the user may pause displaying within the od_list_files() and od_send_file() function. When this variable is set to its default value of TRUE, the user will be able to pause the display by pressing the [P] key, and resume display by pressing any other key. However, the pause feature may be disabled by setting this variable to FALSE. ------------------------------------------------------------------------------- od_list char od_control.od_list_stop; _stop This variable contains a Boolean value, which allows you to control whether or not the user may abort displaying within the od_list_files() and od_send_file() function. When this variable is set to its default value of TRUE, the user will be able to pause the display by pressing the [S], [CTRL]-[K] or [CTRL]-[C] keys. However, the stop feature may be disabled by setting this variable to FALSE. ------------------------------------------------------------------------------- od_local void (*od_control.od_local_input)(int); _input If set, this function is called whenever the sysop presses a non-sysop-function key on the local keyboard. The key pressed is =============================================================================== OpenDoors 5.00 Manual End of Page 198 passed to the function in the single int parameter that it accepts. ------------------------------------------------------------------------------- od_logfile void *(od_control.od_logfile)(void); To make the OpenDoors log file system available in your program, set this variable to INCLUDE_LOGFILE, prior to calling any OpenDoors functions. If not set, or if set to NO_LOGFILE, the OpenDoors log file system will not automatically be enabled. ------------------------------------------------------------------------------- od_logfile char od_control.od_logfile_disable; _disable This variable defaults to the value of FALSE, unless the "LogfileDisable" option is specified in the configuration file, in which case the variable will be set to TRUE. If this variable is set to TRUE, OpenDoors will not write to a logfile, even if the logfile system is enabled using od_control.od_logfile. ------------------------------------------------------------------------------- od_logfile char *od_control.od_logfile_messages[14]; _messages This array of pointers to strings contains the messages that OpenDoors will automatically write to the log file, if the log file system is enabled. If you wish to change the settings of this array, you should do so before calling any OpenDoors functions. The default strings for this array are as follows: [0] "Carrier lost, exiting door" [1] "System operator terminating call, exiting door" [2] "User's time limit expired, exiting door" [3] "User keyboard inactivity time limit exceeded, exiting door" [4] "System operator returning user to BBS, exiting door" [5] "Exiting door with errorlevel %d, [6] "Invoking operating system shell" [7] "Returning from operating system shell" [8] "User paging system operator" [9] "Entering sysop chat mode" [10] "Terminating sysop chat mode" [11] "%s entering door" [12] "Reason for chat: %s" [13] "Exiting door" =============================================================================== OpenDoors 5.00 Manual End of Page 199 ------------------------------------------------------------------------------- od_logfile char od_control.od_logfile_name[80]; _name This variable specifies the filename, and optionally the full path of the logfile where OpenDoors should perform logging. This variable only has an effect when set prior to calling any OpenDoors functions. If the log file name is specified in the configuration file, that name will be stored in this variable. If you do not set this variable, and the log file name is not specified in the configuration file, the default name "DOOR.LOG" will be used. If you wish to set this variable, you should do so prior to calling od_init() or any OpenDoors function. ------------------------------------------------------------------------------- od_ unsigned int od_control.od_maxtime; maxtime This variable specifies the maximum length of time that any user is permitted to use the door, and is normally set from a configuration file option. If upon entering the door, the user's time remaining online is greater than the od_maxtime setting, their time remaining is temporarily decreased to the maximum value. Then upon exit of the door, the number of subtracted minutes is added back onto the user's remaining time. If the user's remaining time is less than this value, then the setting has no effect. A value of 0 disables the maximum time setting altogether. ------------------------------------------------------------------------------- od_maxtime int od_control.od_maxtime_deduction; _deduction This variable store the amount of time that should be added to the user's time upon exit of the door, as a result of the maximum time deduction, described above. If the maximum time feature is not used, this variable will be given a value of 0. ------------------------------------------------------------------------------- od_mps void (*od_control.od_mps)(void); To make the OpenDoors Multiple Personality system available in your program, set this variable to INCLUDE_MPS before calling any OpenDoors functions. If this variable is not set, or is set to NO_MPS, the Multiple Personality System will be disabled. For more information on the OpenDoors Multiple Personality System, see page 223. =============================================================================== OpenDoors 5.00 Manual End of Page 200 ------------------------------------------------------------------------------- od_no_ void (*od_control.od_no_file_func)(); file_func If od_no_file_func is set to point to a function, that function will be called whenever a door information (drop) file cannot be located or read. This provides an easy mechanism to add your own door information file reader, or to provide a local login prompt when no drop file is present. If you wish the door to operate in local mode, you should set od_control.od_force_local to TRUE prior to returning from your function. If you have successfully read your own door information file format, you should set od_control.od_info_type to CUSTOM. If neither of these variables are set by the od_no_file_function, OpenDoors will report that it is unable to find or read a door information file and will exit immediately. ------------------------------------------------------------------------------- od_no_ra char od_control.od_no_ra_codes; _codes This variable defaults to FALSE. When set to TRUE, the translation of the RemoteAccess/QuickBBS control codes by the functions od_sen_file(), od_hotkey_menu() and od_disp_emu() is disabled. ------------------------------------------------------------------------------- od_ char od_control.od_nocopyright; nocopyright This variable is a Boolean value that allows you to prevent OpenDoors from displaying its name, version number, copyright notice and registration information when the program begins execution. Set this variable to TRUE to disable the display of copyright and associated information. When this variable is set to TRUE, OpenDoors also does not change the initial display colour on startup. For obvious reasons, this variable does not take effect when OpenDoors is operating in unregistered mode. ------------------------------------------------------------------------------- od_noexit char od_control.od_noexit; This variable contains a Boolean value, which allows you to prevent OpenDoors from exiting when shutting down. This may be useful when you want to have your program to do more processing after you have called the od_exit() function, or if you do not wish to have your program exit automatically when the user drops carrier. Normally, this variable will default to a value of FALSE, indicating that OpenDoors will exit normally when the od_exit() function is called. However, you may optionally set this variable to TRUE after od_init() or some OpenDoors function =============================================================================== OpenDoors 5.00 Manual End of Page 201 has been called. In this case, when the od_exit() function is called, either by your program manually, or automatically by OpenDoors in response to the user dropping carrier, etc., OpenDoors will not exit. However, the normal operations of closing the serial port and re-writing the door information file will be carried out. If you set the od_noexit variable to TRUE, you will probably have to provide some mechanism to allow your program to detect when OpenDoors shutdowns due to the loss of carrier, etc. The best way of doing this is to provide a function which is to be called at the beginning of the od_exit() function, by setting the od_control.od_before_exit pointer, described above. ------------------------------------------------------------------------------- od_page char od_control.od_page_len; _len This variable allows you to control the length, in seconds, of the sysop page beep produced when the user pages the sysop via the od_page() function. ------------------------------------------------------------------------------- od_page char od_control.od_page_pausing; _pausing This variable contains a Boolean value that indicates whether or not page pausing is enabled in the od_send_file(), od_hotkey_menu() and od_list_files() functions. The default value of TRUE indicates that page pausing is enabled. A value of FALSE indicates that page pausing is disabled. ------------------------------------------------------------------------------- od_page int od_control.od_pagestartmin; startmin int od_control.od_pageendmin; od_page These variables indicate the start and end times for sysop endmin paging, expressed as the number of minutes past midnight. Sysop paging will be available through the od_page() function from the start time, up to but not including the end time. ------------------------------------------------------------------------------- od_page char od_control.od_page_statusline; _statusline This variable controls which status line, if any, is activated when the user pages the system operator (via the od_page() function). A value between 0 and 9 causes the corresponding status line to be activated. A value of -1 prevents any change from being made to the current status line setting. This =============================================================================== OpenDoors 5.00 Manual End of Page 202 variable will normally be set by personality functions (see page 223). ------------------------------------------------------------------------------- od_prog_name char od_control.od_prog_name[40]; This variable should contain the full name of your program, up to 39 characters. Currently, this variable is only used when writing to the OpenDoors log file. However, this variable may also be used for other purposes in future versions. If not set, OpenDoors will use its name and version information in place of this variable. If used, this variable should be set prior to calling any OpenDoors functions. ------------------------------------------------------------------------------- od_reg_key unsigned log od_control.od_reg_key; When you purchase an OpenDoors licence (registration), this variable should be set to your registration key, prior to calling any OpenDoors functions. ------------------------------------------------------------------------------- od_reg_name char od_control.od_reg_name[36]; When you purchase an OpenDoors licence (registration), this variable should be set to your name, or your company's name, as is listed in your OpenDoors registration record. ------------------------------------------------------------------------------- od_spawn char od_control.od_spawn_freeze_time; _freeze_time This variable is a Boolean value which indicates whether or not the user's time remaining is frozen during the execution of one of the od_spawn...() functions. If this variable is set to TRUE, the user's time remaining will not decrease during the time that the od_spawn...() function is executing. However, if this variable is set to FALSE, the user's time remaining will continue to be subtracted during the execution of the od_spawn...() function. The default value of this variable is FALSE. =============================================================================== OpenDoors 5.00 Manual End of Page 203 ------------------------------------------------------------------------------- od_swapping char od_control.od_swapping_disable; _disable This variable is a Boolean value which specifies whether or not OpenDoors will attempt to swap itself and your entire door upon DOS shell or a call to one of the od_spawn...() functions. This variable defaults to FALSE. If set to TRUE, OpenDoors will not attempt to perform swapping activities. ------------------------------------------------------------------------------- od_swapping char od_control.od_swapping_noems; _noems This variable is a Boolean value which can be used to prevent OpenDoors from swapping to EMS memory. This variable defaults to the value FALSE. If set to TRUE, OpenDoors will not attempt to use EMS memory for swapping, and will only swap to disk. ------------------------------------------------------------------------------- od_swapping char od_control.od_swapping_path; _path This variable specifies the drive and directory where OpenDoors should create its disk swapping file, if applicable. More than one path can be specified, by separating the paths with a semi- colon (;) character. ------------------------------------------------------------------------------- od_status char od_control.od_status_on; _on This variable is a Boolean value which allows your program to completely disable the OpenDoors status line. The variable defaults to a value of TRUE, which causes the OpenDoors status line to be controllable by function keys, displayed and updated as it would normally be. However, if this variable is set to FALSE, then OpenDoors will not update the status line, nor will it allow the status line to be re-displayed as a result of one of the status line ([F1] through [F10]) keys being pressed. When you change the value of this variable from FALSE to TRUE, OpenDoors will automatically redisplay the status line. Note, however, that the status line isn't automatically removed when the value of this variable is changed from TRUE to FALSE. In order to erase the status line after resetting the value of this variable, you should reset the output window to the full screen, by calling the function window(1,1,25,80). Then manually erase the old status line either by clearing the bottom two lines of the screen, or by clearing the entire screen. It is important that you do not confuse the use of this variable with the od_set_statusline() function, which is described on =============================================================================== OpenDoors 5.00 Manual End of Page 204 page 136. When the status line is enabled, the sysop can change which status line, if any, is being displayed, using the function keys [F1] through [F10]. The od_set_statusline() function allows your program to make the same changes to the status line setting which the sysop can make by pressing one of the function keys. The status line can be removed from the screen, allowing a full 25 lines of text to be displayed, by pressing the [F10] key, or by making the appropriate call to the od_set_statusline() function. Note, however, than when this is done, the status line is still enabled, and can be turned on by pressing any of the other function keys. On the other hand, if the status line is turned off using this variable (od_control.od_status_on), the status line sub-system will be disabled, and pressing function keys will not "bring it back". So, if you were writing a program where a status line would be undesirable - such as a non-door communications program, you would use the od_control.od_status_on variable. On the other hand, if you only wanted to temporarily remove the status line - say in order that all 25 lines of a door program's output could be viewed - while still allowing the status line to be turned on with the sysop function keys, you would use the od_set_statusline() function. For more information on the od_set_statusline() function, see page 136. ------------------------------------------------------------------------------- od_time void (*od_control.od_time_msg_func)(char *string) _msg_func This variable defaults to a value of NULL. If set to point to a function, OpenDoors will call this function INSTEAD OF displaying time limit warning messages to the user. The messages redirected to this function are: - Inactivity timeout warning - Inactivity timeout expired - Less than 4 minutes left today - Daily time limit expired Providing your own od_time_msg_func allows you to display these messages at a specific screen location, within a popup window, etc. The function pointed to by od_time_msg_func must accept a single parameter of type char *. OpenDoors will pass a pointer to the string containing the time limit message in this parameter. =============================================================================== OpenDoors 5.00 Manual End of Page 205 CONTROL STRUCTURE - FUNCTION KEYS ------------------------------------------------------------------------------- Within OpenDoors, as with most BBS software and doors, the sysop has access to a number of function keys, which permits the sysop to carry out various functions such as entering chat mode, hanging up on the user, shelling to DOS, and so on. (For more information on these function key, see page 32.) The variables in this section allow you to customize which keys carry out the standard sysop functions, allowing you to customize your door's interface to mimic any BBS package. By default, OpenDoors emulates the function keys used by the Remote Access BBS package, but you may choose, for example, to have your door use the key combinations used by PC-Board. In addition, OpenDoors provides an interface which allows you to add your own function keys which will be accepted by the door. This could allow you to add additional features, such as giving the sysop access to a status screen which displays information about your door. Many of the variables in this section are unsigned ints, which represent a sysop key combination such as [ALT]-[H], [F8], or [CTRL]-[P]. These values are in the same format as is returned by the Turbo C(++) / Borland C++ bioskey() function. The high- order byte represents the scan code of the key, and the low- order byte represents the ASCII value, if any, of the key combination. Note that a complete tutorial on these key codes is beyond the scope of this manual. For more information on these key codes, you should see the documentation on the bioskey() function, which accompanies your compiler. If you wish to determine the key code which corresponds to a particular keystroke, there is a simple program, listed below, which you can compile and use. This program will simply display the key code for any key pressed, until you press the [ESCape] key. So, in order to determine the code for [SHIFT]-[F8], you would simply run this program, press the [SHIFT]-[F8] key combination on your keyboard, and record the value displayed on your screen. #include <bios.h> int main(int argc, char *agv[]) { register unsigned int keystroke=0; while((keystroke&0xff)!=27) { keystroke=bioskey(0); if(keystroke!=0) { printf("You pressed %u\n",keystroke); =============================================================================== OpenDoors 5.00 Manual End of Page 206 } } } ------------------------------------------------------------------------------- BUILT IN These variable allow you to customize the sysop function keys FUNCTION which control functions such as hanging up on the user, shelling KEYS to DOS, and so on. All of these variable will be assigned default values, which correspond to the same function keys used by the RemoteAccess BBS package. However, you may change the values of these variables in order to customize the key combinations which carry out these functions in your own door program. Remember that if you wish to change the value of any of these variables, you must do so after having called od_init() or some OpenDoors function. Each of these variables contain a scan- code / ASCII-code combination representing a keystroke, as is described above. These variables are as follows: +---------------------+----------------------------------------+ | VARIABLE | CORRESPONDING FUNCTION | +---------------------+----------------------------------------+ | od_control. | Enter sysop chat mode | | key_chat | (Normally [ALT]-[C] | | | | | od_control. | Invoke sysop DOS shell | | key_dosshell | (Normally [ALT]-[J] | | | | | od_control. | Return to the BBS without hanging up | | key_drop2bbs | (Normally [ALT]-[D]) | | | | | od_control. | Hangup on the user | | key_hangup | (Normally [ALT]-[H]) | | | | | od_control. | Turn off the user's keyboard | | key_keyboardoff | (Normally [ALT]-[K]) | | | | | od_control. | Decreases the user's remaining time | | key_lesstime | (Normally [DOWN-ARROW]) | | | | | od_control. | Lock the user out of the BBS system | | key_lockout | (Normally [ALT]-[L]) | | | | | od_control. | Increases the user's remaining time | | key_moretime | (Normally [UP-ARROW]) | | | | | od_control. | Array of eight function keys to set the| | key_status[8] | current status line. | | | (Normally [F1], [F2], [F3], [F4], [F5],| | | [F6], [F9], [F10]) | | | | | od_control. | "Sysop next" toggle key | | key_sysopnext | (Normally [ALT]-[N]) | +---------------------+----------------------------------------+ =============================================================================== OpenDoors 5.00 Manual End of Page 207 ------------------------------------------------------------------------------- CUSTOM In addition to the sysop function keys built into OpenDoors, you FUNCTION may wish to add your own function keys to your door. For KEYS example, you might wish to have the [ALT]-[Z] combination display a window of information about your door, or you may wish to add your own user editor to your door, accessible through the [ALT]-[E] combination. The four variables: unsigned char od_control.od_num_keys; unsigned int od_control.od_hot_key[16]; unsigned int od_control.od_last_hot; void (*od_control.od_hot_function[16])(void); provide your program with an interface to add your own sysop function keys (not accessible by the remote user) to the door you have written. OpenDoors allows you to define up to sixteen custom sysop function keys. The key codes (as described at the beginning of this section) are stored in the od_control.od_hot_key[] array, and the od_control.od_num_keys variable records the number of keys which have been defined. The od_control.od_num_keys variable defaults to a value of 0. So, in order to add your own function keys, simply place the key codes for these keys in the first n elements of the od_control.od_hot_key[] array, and set the od_control.od_num_keys variable to the number of keys you have defined. OpenDoors will then watch the keyboard for any of your predefined sysop function keys being pressed. If one of these keys is pressed, OpenDoors will place the key code of the pressed key in the od_control.od_last_hot variable. Your program will then be able to respond to one of your custom function keys being pressed by checking the value of the od_control.od_last_hot variable. At any time this variable contains a non-zero value. If this is the case, you will then be able to determine which of your function keys has been pressed by checking the key code contained in this variable. After taking the appropriate action for the key pressed, you should be sure to reset the value of the od_control.od_last_hot variable back to zero, which will indicate to OpenDoors that your program has received and responded to the function key which was pressed. As an alternative to testing the contents of the od_control.od_last_hot variable, you can also have your program respond to custom sysop function keys by providing a callback function in the array: void (*od_control.od_hot_function[16])(void); The Nth element in this array corresponds to the Nth element in the od_control.od_hot_key array. To use this mechanism, simply =============================================================================== OpenDoors 5.00 Manual End of Page 208 set the appropriate element of this array to point to the function that you wish to have OpenDoors call when the sysop presses the corresponding function key. For instance, assume that the following function is included in your program's source code: void addPoints(void) { /* add ten points to the user's score */ currentUser->points += 10; } If you wanted to have this function called when the sysop presses the [Page Up] key, you could do the following: /* get number of new sysop function key, and increment */ /* total number of keys */ int new_key = od_control.od_num_keys++; /* Set next sysop hotkey to Page Up */ od_control.od_hot_key[new_key] = 0x4900; /* Set corresponding function to addPoints() */ od_control.od_hot_function[new_key] = addPoints; =============================================================================== OpenDoors 5.00 Manual End of Page 209 CONTROL STRUCTURE - COLOUR CUSTOMIZATION ------------------------------------------------------------------------------- The OpenDoors control structure variables listed in this section allow you to customize the colour of text displayed by several of the OpenDoors functions. Each of the variables in this section are unsigned chars, which contain the IBM-PC colour attribute of the colour to be displayed. For more information on these colour attributes, see the description of the od_set_attrib() function on page 125. These colour variables are listed below, along with a description of where each colour is used: +---------------------+----------------------------------------+ | VARIABLE | WHERE COLOUR IS USED | +---------------------+----------------------------------------+ | od_control. | Text typed by the sysop in chat mode | | od_chat_colour1 | | | | | | od_control. | Text typed by the user in chat mode | | od_chat_colour2 | | | | | | od_control. | File description fields in FILES.BBS | | od_list_comment_col | listings | | | | | od_control. | Color of page pausing prompt that is | | od_continue_col | displayed at the end of each page | | | | | od_control. | Filename fields in FILES.BBS listings | | od_list_name_col | | | | | | od_control. | "Missing" string in FILES.BBS listings | | od_list_offline_col | | | | | | od_control. | File size fields in FILES.BBS listings | | od_list_size_col | | | | | | od_control. | Title fields in FILES.BBS listings | | od_list_title_col | | | | | | od_control. | Color of the window title as displayed | | od_menu_title_col | by od_popup_menu() | | | | | od_control. | Color of the window border as | | od_menu_border_col | displayed by od_popup_menu() | | | | | od_control. | Color of the normal text displayed | | od_menu_text_col | by od_popup_menu() | | | | | od_control. | Color of the shortcut keys displayed | =============================================================================== OpenDoors 5.00 Manual End of Page 210 | od_menu_key_col | by od_popup_menu() | | | | | od_control. | Color of the selection bar as | | od_menu_highlight_ | displayed by od_popup_menu() | | col | | | | | | od_control. | Color of the shortcut keys displayed | | od_menu_highkey_col | on the selected line by od_popup_menu()| +---------------------+----------------------------------------+ =============================================================================== OpenDoors 5.00 Manual End of Page 211 CONTROL STRUCTURE - TEXT CUSTOMIZATION ------------------------------------------------------------------------------- In addition to the other aspects of OpenDoors which may be customized by use of the OpenDoors control structure, all of the text displayed by OpenDoors may also be customized. This may be done either to create doors with OpenDoors that use languages other than English, or to simply give your doors a "personal touch". The variables described in this section allow you to define what text you want to have displayed by OpenDoors at any time. All of these variables are pointers to strings, and are set to default values in the od_init() function. Thus, if you wish to change the string pointed to by any of these variables, you must do so after od_init() or some OpenDoors API function has been called. To set any of these variables, you can simply set them to point to a string-constant in your program. For example, to set the text displayed by OpenDoors prior to a DOS shell, you could: od_control.od_before_shell=(char *)"\n\rJust a moment...\n\r"; The chart below lists each of the text customization variables (without the "od_control." prefix, for the sake of brevity), along with their default strings. Note that some of these strings MUST always be the same length as their default string. You may not display longer text within these strings, and if you wish to display shorter text, you must pad the remaining space in the string with spaces, in order to preserve its length. Those string which must be of fixed length also have their length listed in the chart below. Any strings which have an asterisk (*) in their length column may be any length. Also keep in mind that any string with "printf-style" formatting sequences, such as "%s", must retain the same sequences in the same order. In addition, four of these pointers - od_after_chat, od_after_shell, od_before_chat and od_before_shell - can be set to a value of NULL. In this case, OpenDoors will not display any string where this variable's string is normally displayed. +-----------------------+-----+----------------------------------------------+ | VARIABLE NAME | LEN | DEFAULT VALUE | +-----------------------+-----+----------------------------------------------+ | od_after_chat | * | "\n\rChat mode ended...\n\r\n\r" | | | | | | od_after_shell | * | "\n\r...Thanks for waiting\n\r\n\r" | | | | | =============================================================================== OpenDoors 5.00 Manual End of Page 212 | od_before_chat | * | "\n\rSysop breaking in for chat...\n\r\n\r" | | | | | | od_before_shell | * | "\n\rPlease wait a moment...\n\r" | | | | | | od_chat_reason | * | " Why would you " | | | | "like to chat?\n\r" | | | | | | od_continue | * | "Continue? [Y/n/=]" | | | | | | od_continue_no | char| 'N' | | | | | | od_continue_nonstop | char| '=' | | | | | | od_continue_yes | char| 'Y' | | | | | | od_day[0] | 3 | "Sun" | | | | | | od_day[1] | 3 | "Mon" | | | | | | od_day[2] | 3 | "Tue" | | | | | | od_day[3] | 3 | "Wed" | | | | | | od_day[4] | 3 | "Thu" | | | | | | od_day[5] | 3 | "Fri" | | | | | | od_day[6] | 3 | "Sat" | | | | | | od_hanging_up | * | "Terminating Call" | | | | | | od_help_text | 80 | " Alt: [C]hat [H]angup [L]ockout [J]Dos " | | | | "[K]eyboard-Off [D]rop to BBS " | | | | | | od_help_text2 | 79 | " OpenDoors 5.00 - (C)Copyright 1992, " | | | | "Brian Pirie - Registered Version " | | | | | | od_inactivity_timeout | * | "User sleeping at keyboard, inactivity " | | | | "timeout...\n\r\n\r" | | | | | | od_inactivity_warning | * | "Warning, only %d minute(s) remaining " | | | | "today...\n\r\n\r" | | | | | | od_month[0] | 3 | "Jan" | | | | | | od_month[1] | 3 | "Feb" | | | | | | od_month[2] | 3 | "Mar" | | | | | | od_month[3] | 3 | "Apr" | | | | | | od_month[4] | 3 | "May" | | | | | | od_month[5] | 3 | "Jun" | =============================================================================== OpenDoors 5.00 Manual End of Page 213 | | | | | od_month[6] | 3 | "Jul" | | | | | | od_month[7] | 3 | "Aug" | | | | | | od_month[8] | 3 | "Sep" | | | | | | od_month[9] | 3 | "Oct" | | | | | | od_month[10] | 3 | "Nov" | | | | | | od_month[11] | 3 | "Dec" | | | | | | od_no_keyboard | 10 | "[Keyboard]" | | | | | | od_no_sysop | * | "\n\rI'm afraid the sysop is not available " | | | | "at this time.\n\r" | | | | | | od_no_response | * | " No response.\n\r\n\r" | | | | | | od_no_time | * | "Sorry, you have used up your time for " | | | | "today...\n\r\n\r" | | | | | | od_offline | 10 | "[OFFLINE] " | | | | | | od_paging | * | "\n\rPaging Sysop for Chat" | | | | | | od_press_key | * | "Press [Enter] to continue..." | | | | | | od_sending_rip | * | "\xb4 Sending RIP File \xc3" | | | | | | od_status_line[0] | 80 | " " | | | | " [Node: " | | | | | | od_status_line[1] | * | "%s of %s at %u BPS" | | | | | | od_status_line[2] | 79 | "Security: Time: " | | | | " [F9]=Help " | | | | | | od_sysop_next | 5 | "[SN] " | | | | | | od_time_left | 10 | "%d mins " | | | | | | od_time_warning | * | "Warning, only %d minute(s) remaining tod" | | | | "ay...\n\r\n\r" | | | | | | od_want_chat | 11 | "[Want-Chat]" | +-----------------------+-----+----------------------------------------------+ =============================================================================== OpenDoors 5.00 Manual End of Page 214 ------------------------------------------------------------------------------- CHAPTER 6 - SPECIAL TOPICS ------------------------------------------------------------------------------- CONFIGURATION FILE SYSTEM ------------------------------------------------------------------------------- One of the most useful OpenDoors features that you can optionally choose to include in your programs is the OpenDoors configuration file system. All that is required to enable the configuration file system is to include the following line before your first call to any OpenDoors function: od_control.od_config_file = INCLUDE_CONFIG_FILE; OpenDoors will now search for and read an OpenDoors configuration file. If you do not specify the name of this file, the default name of DOOR.CFG will be used. Using this configuration file, the sysop can set a wide variety of options, such as modem and system configuration information, maximum time limits for the door, and even define custom door information (drop) file formats. The example DOOR.CFG file included in your OpenDoors package shows the format and all options that are automatically supported by the configuration file system. This configuration file format is designed to be easy to use, and the example configuration file contains comments which provide a complete description of each option. Feel free to redistribute DOOR.CFG or a modified version of this file with your door programs. In addition to the many configuration file settings already supported, you can add your own settings that are specific to your particular program. To specify your own filename for the configuration file, use the od_config_filename control structure variable. For example, the following line: od_control.od_config_filename = "MYDOOR.CFG" causes OpenDoors to look for the configuration file MYDOOR.CFG instead of the default DOOR.CFG. OpenDoors fill first search for the configuration file in the directory specified in the od_config_filename variable, if a specific directory name was supplied. If not found, it will then search the current directory. If the configuration file system is unable to locate a configuration file, or if any settings are omitted from the file, the default values for these settings will be used automatically. This means that the configuration file is always optional, unless your program has custom settings that it requires in order to run. =============================================================================== OpenDoors 5.00 Manual End of Page 215 The format for the configuration file is as follows. Blank lines and any text following the semi-colon (;) character are ignored. Configuration options are specified using a keyword, possibly followed by one or more options. The keywords are not case sensitive, but some of the options are. The order of options in the configuration file is not significant, with the exception of the "CustomFileLine" option. For more information on the "CustomFileLine" setting, see the section that begins on page 220. The built-in configuration options are as follow: BBSDir - BBS System directory. Indicates where the door information file (drop file) can be found. DoorDir - The door's working directory. This is where the door's system files are located. OpenDoors will automatically perform a chdir into this directory at initialization, and will return to the original directory on exit. LogFileName - Specifies the filename (path optional) where the door should record log information. DisableLogging - Prevents door from writing to a log file. Node - BBS node number that the door is running on. Only used if OpenDoors is unable to determine the node number by some other means. ???dayPagingHours - Specifies sysop paging hours. Sysop paging will be permitted beginning at the start time, up until, but not including, the end time. Times should be in the 24- hour format. To disable paging on a particular day, set the paging start and end times to the same time. ???day can be one of Sunday, Monday, Tuesday, Wednesday, Thursday, Friday or Saturday. PagDuration - Duration of sysop page. Value indicates the number of beeps that compose the sysop page alarm. MaximumDoorTime - Maximum length of time a user is permitted to access the door. If the user's total remaining time on the BBS is less than this value, the user will only be permitted to access the door for this shorter length of time. This option is disabled by commenting out the line. InactivityTimeout - Specifies the maximum number of seconds that may elapse without the user pressing a key, before the user will automatically be disconnected. A value of 0 disables inactivity timeouts. SysopName - Name of the sysop. OpenDoors can usually determine the sysop's name from the door information (drop) file. How3ever, some BBS packages do not supply this information. =============================================================================== OpenDoors 5.00 Manual End of Page 216 In such cases, if the sysop's name is required by the door, it may be supplied here. SystemName - Like the sysop's name, this option can usually be determined from the door information file. If it is not available, the sysop my supply the information here. ChatUserColour - Specifies the colour of text typed by the user in sysop chat mode. The format of the colour name is included in the description of the od_colour_config() function. ChatSysopColour - Specifies the colour of test typed by the sysop in chat mode. FileListTitleColour - Files.BBS listing colours. FileListNameColour FileListSizeColour FileListDescriptionColour FileListOfflineColour SwappingDir - Directory where disk swapping will be done. SwappingNoEMS - Disables swapping to EMS memory. SwappingDisable - Disables swapping entirely. LockedBPS - BPS rate at which door should communicate with the modem. Valid rates are 300, 600, 1200, 2400, 4800, 9600, 19200 and 38400. A value of 0 forces the door to always operate in local mode. This option is not normally needed, as the information is usually available from the door information file. FossilPort - Specifies the FOSSIL driver port number that the modem is connected to. FOSSIL port 0 usually corresponds to COM1, port 1 to COM2, and so on. This option is not normally needed, as the information is usually available from the door information file. CustomFileName - Specifies the filename used by the custom door information file format. Described in more detail below. CustomFileLine - Specifies the contents of a particular line in the custom door information file format. The last two configuration file options, "CustomFileName" and "CustomFileLine" allow you or the system operator using your program to define your own door information (drop) file formats. For more information on this topic, see the section which begins on page 220. You can also extend OpenDoor's configuration file format to add your own options, by supplying a callback function that will be =============================================================================== OpenDoors 5.00 Manual End of Page 217 called whenever OpenDoors encounters an unrecognized configuration file keyword. The prototype of this function should be as follows: custom_line_function(char *keyword, char *options) To cause OpenDoors to use your function, you would include the following line before your first call to any OpenDoors function: od_control.od_config_function = custom_line_function; (You can use a different function name if you wish.) When OpenDoors encounters unrecognized keyword, it will now call your function, passing a pointer to an upper case version the keyword string in the first parameter, and a pointer to any options that follow the keyword in the second parameter. For instance, if the following line were encountered in the configuration file: RegisteredTo John Smith ; Sysop's name The parameters passed to your function would be: char *keyword = "REGISTEREDTO" char *options = "John Smith" Your custom line function should be written in such a way that if OpenDoors passes a configuration option to your function that your function does not recognize, that option would simply be ignored. The example program below demonstrates how to use the custom line function to add your own configuration file options. This program looks for three custom configuration file options, "RegistrationKey", "DefaultColour" and "DisplayWinners". If the "RegistrationKey" option is present, the numerical value following this option is stored in the global variable "key". If the "DefaultColour" option is present, the color description (such as "Bright Red on Black") is translated to an od_set_attr() colour code using od_colour_config(). This color setting is stored in the global variable default_colour. Since this variable is initialized to 0x07 (the value for dark white on black), if this option is omitted, that colour is used by default. If the "DisplayWinners" option is included in the configuration file, the global variable display_winners is set to TRUE, regardless of any options that may follow this keyword. #include "opendoor.h" /* Include opendooor.h */ /* Prototype for custom line function */ void custom_line_function(char *keyword, char *options); unsigned long key=0L; /* Variables for our own config option */ unsigned char default_colour=0x07; char display_winners=FALSE; =============================================================================== OpenDoors 5.00 Manual End of Page 218 main() /* Program's execution begins here */ { /* Begin door operations, reading config file */ od_config_file = INCLUDE_CONFIG_FILE; od_init(); /* Main program's operations go here */ od_exit(FALSE,10); /* Exit door */ } /* Code for custom line function */ void custom_line_function(char *keyword, char *options) { /* If option is registration key */ if(stricmp(keyword,"REGISTRATIONKEY")==0) { key=atol(options); /* Store key in variable */ } /* If option is text colour */ else if(stricmp(keyword,"DEFAULTCOLOUR")==0) { /* Get colour value using od_colour_config() */ default_colour=od_colour_config(options); } /* Example of option enabled by just the keyword */ else if(stricmp(keyword,"DISPLAYWINNERS")==0) { /* If keyword is present, turn on option */ display_winners=TRUE; } } =============================================================================== OpenDoors 5.00 Manual End of Page 219 DEFINING CUSTOM DOOR INFORMATION FILE FORMATS ------------------------------------------------------------------------------- As is mentioned in the previous section, the OpenDoors configuration file system provides two settings which allow the sysop to define a custom door information file format. This permits OpenDoors doors to operate directly on any BBS system that produces a door information file format not directly supported by OpenDoors. A custom door information file format is defined using the "CustomFileName" option, followed by one or more lines beginning with the "CustomFileLine" option. The "CustomFileName" option specifies the filename used to distinguish this file format from other file formats. This filename should not include a path. To specify the path where the door information file is located, the sysop should use the BBSDir configuration file setting. If the filename of the custom format is the same as that of one of the built-in formats, the custom format will override the built-in format. The actual format of the custom file is specified using a number of lines that begin with the keyword "CustomFileLine". Each of these lines will correspond to a single line in the door information file, with the option following the "CustomFileLine" keyword specifying the information that can be found on that line. This can be one of the following keywords: Ignore - Causes the next line in the door information file to be ignored. Use on lines for which none of the options below apply. COMPORT - COM? port the modem is connected to (0 indicates local mode) FOSSILPORT - Fossil port number the modem is connected to MODEMBPS - BPS rate at which to communicate with modem (0 or non-numerical value indicates local mode) LOCALMODE - 1, T or Y if door is operating in local mode USERNAME - Full name of the user USERFIRSTNAME - First name(s) of the user USERLASTNAME - Last name of the user ALIAS - The user's pseudonym / handle HOURSLEFT - Hours user has left online =============================================================================== OpenDoors 5.00 Manual End of Page 220 MINUTESLEFT - Minutes user has left online, or time left online in format hh:mm SECONDSLEFT - Seconds user has left online, or time left online in format hh:mm:ss or format mm:ss (If more than one of the above time options are used, the user time left is taken to be the total of all of these values.) ANSI - 1, T, Y or G for ANSI graphics mode AVATAR - 1, T or Y for AVATAR graphics mode PAGEPAUSING - 1, T or Y if user wishes a pause at end of screen SCREENLENGTH - Number of lines on user's screen SCREENCLEARING - 1, T or Y if screen clearing mode is on SECURITY - The user's security level / access level CITY - City the user is calling from NODE - Node number user is connected to SYSOPNAME - Full name of the sysop SYSOPFIRSTNAME - The sysop's first name(s) SYSOPLASTNAME - The sysop's last name SYSTEMNAME - Name of the BBS As an example of how to define custom door information file formats, consider the following imaginary file format, which we will name DROPINFO.TXT: Brian Pirie <-- User name 0 <-- Local mode COM1: <-- Serial port to use 9600 <-- BPS rate 22:30:15 05-08-95 <-- File creation time 35 <-- Time remaining (in minutes) 1 <-- ANSI mode Ottawa, Canada <-- Location This format would be defined in an OpenDoors configuration file as follows: =============================================================================== OpenDoors 5.00 Manual End of Page 221 CustomFileName DROPINFO.TXT CustomFileLine USERNAME CustomFileLine LOCALMODE CustomFileLine COMPORT CustomFileLine MODEMBPS CustomFileLine IGNORE CustomFileLine MINUTESLEFT CustomFileLine ANSI CustomFileLine CITY Notice that the first "CustomFileLine" keyword in the configuration file corresponds to the first line in our DROPINFO.TXT file, the second "CustomFileLine" to the second line, and so on. Also notice that the keyword "IGNORE" is used for the line that contains the file creation time, since there is no CustomFileLine keyword that allows you to read this information. =============================================================================== OpenDoors 5.00 Manual End of Page 222 MULTIPLE PERSONALITY SYSTEM ------------------------------------------------------------------------------- The OpenDoors Multiple Personality System allows OpenDoors to support multiple sysop function key / status line "personalities". Most commonly, you will use this feature in conjunction with the "Personality" setting in the OpenDoors configuration file, to allow the sysop to choose one of the built-in personalities that most closely mimics the BBS software they are using. OpenDoors includes the following personalities: Configuration Keyword Manifest constant ----------------------------------------------------------- Standard PER_OPENDOORS PCBoard PER_PCBOARD RemoteAccess PER_RA Wildcat PER_WILDCAT The PCBoard, RemoteAccess and Wildcat personalities mimic the status lines and function keys used by the BBS packages with those names. The Standard personality, which is the personality used by default, is a trimmed down version of the status lines provided by OpenDoors 4.10 and earlier. In addition to using the personalities supplied with OpenDoors, you can create your own personalities. This simply involves writing a function which OpenDoors will call to setup the sysop function keys and to display the status line. Include the following line before your first call to any OpenDoors function: od_control.od_mps = INCLUDE_MPS; to include the multiple personality system in your program. This also enables the Personality setting in the configuration file, if you are using the configuration file system. You can set the default personality to be used by OpenDoors by setting od_control.od_default_personality to one of the manifest constants listed in the table above. If you have included the multiple personality system in your program, this setting will determine the personality to use if the "Personality" option is not set in the configuration file, and your program does not later change the personality using the od_set_personality() function. If you do not include the multiple personality system in your program, this setting will determine the personality that will always be used. =============================================================================== OpenDoors 5.00 Manual End of Page 223 Creating your own personality involves writing a single function.. Whenever OpenDoors needs to perform an operation that involves the personality, it will call this function, passing one of the following message values: PEROP_INITIALIZE Initialize the personality, installing any custom function keys. PEROP_DEINITIALIZE Deinitialize the personality, returning any changed settings to their original values. PEROP_CUSTOMKEY Indicates that a custom function key has been pressed. PEROP_DISPLAYx Where x is a number from 1 to 10. Indicates that the specified status line should be drawn from scratch. PEROP_UPDATEx Where x is a number from 1 to 10. Indicates that the specified status line should be updated to reflect any changes. If you have enabled the multiple personality system by setting od_control.od_mps to INCLUDE_MPS, you can install your personality function into OpenDoors by calling od_add_personality(). When you call od_add_personality(), you supply a string containing the name of the personality, along with the top and bottom output line numbers to use. These line numbers specify the portion of the screen to use for door output, leaving the remainder of the screen available for displaying the personality's status line. Once the personality has been installed into OpenDoors, it can be selected by the sysop using the "Personality" configuration file option, or manually activated using the od_set_personality() function. For more information on the od_add_personality() function, see page 46. You can make your personality function the default personality by setting od_control.od_default_personality to point to your personality function. As is the case with the built-in personalities, this setting will be used as the default personality if you have enabled the multiple personality system by setting od_control.od_mps to INCLUDE_MPS. If you have not enabled the multiple personality system in this manner, your personality function will become the one and only personality used within your program. When creating your own personality, you can use the od_control.od_page_statusline variable to set which status line (if any) will be activated when the user pages the system operator. =============================================================================== OpenDoors 5.00 Manual End of Page 224 LOG FILE SYSTEM ------------------------------------------------------------------------------- In order for the system operator to monitor system activity and diagnose problems that have ocurred while the system was unattended, it is common for BBS software and door programs to record major events in a log file. This log file typically records the date and time of evens such as a user logging on or off, transferring files, sending messages, paging the system operator, and similar activities. Sometimes the system operator will configure all of the pieces of software running on a paticular node to write to a single log file. In other cases, the system operator will prefer to have each program write to its own log file. However, software serving one line of a multi- node BBS system should never attempt to write to the same log file that is used by anothe rnode. OpenDoors uses the "FrontDoor format" log file standard. This was chosen as it is a clearly documented format that is quickly becoming the standard for bulletin board software log files. A segment from a log file produced by OpenDoors is listed below. ---------- Thu 25 Feb 93, EZVote 5.00 > 19:42:23 Brian Pirie entering door > 19:50:55 User paging system operator > 19:51:02 Entering sysop chat mode > 20:05:41 Terminating sysop chat mode > 20:18:32 User time expired, exiting door To enable the OpenDoors log file system, simply include the following line before your first call to any OpenDoors function: od_control.od_log_file = INCLUDE_LOGFILE; When OpenDoors is initialized, it will open the log file and begin logging activities, unless logging has been disabled with the od_control.od_logfile_disable variable. The log file name will be taken from the od_control.od_logfile_name variable, which is usually set by the configuration file. If no logfile name has been set, OpenDoors will use the logfile named DOOR.LOG. Upon opening the log file, OpenDoors will write an entry indicating the time at which the use entered the door. The od_control.od_prog_name variable sets the program name that is written to the log file immediately after the current date information. If this variable is not set, OpenDoors will write its own name and version information in this place. When the OpenDoors log file system is enabled, OpenDoors will automatically produce logfile entries for the following events: =============================================================================== OpenDoors 5.00 Manual End of Page 225 - User paging sysop - Beginning of sysop chat - Ending of sysop chat - Sysop entering DOS shell - Sysop returning from DOS shell - User inactivity timeout - User time expired - Sysop dropping user back to BBS - Sysop hanging up on user - User hanging up on BBS - Sysop locking out user - Your door calling the od_exit() function These built in log file entries can be customized by altering the value of the array od_control.od_logfile_messages. The logfile is automatically closed when your program exits. =============================================================================== OpenDoors 5.00 Manual End of Page 226 MAKING DOORS MULTI-NODE-AWARE ------------------------------------------------------------------------------- Today, it is common for BBS systems to have multiple nodes (phone lines) that can be in use by different users simultaneously. As such, it is often possible for door programs to be in use concurrently by more than one person, each on a different node of the BBS. Some doors are designed to behave on multi-node systems just as they would on single-line BBSes (except for the fact that more than one person may be using the door at once). Other doors take special advantage of multi-node environments to permit users to interact or communicate with one another in "real time". In either case, there are a number of issues that the door programmer must be aware of when writing doors for multiple node BBSes that are not of concern in single node situations. If you expect your door program to be used on a multi-line BBS system, the best time to begin planning for multi-node capabilities is when you first start to write your door. Writing multi-node-aware doors is not usually much more complicated than writing doors that are not multi-node-aware. However, the job is usually much easier if you plan multi-node capabilities from the beginning. OpenDoors is designed for use with both single-node and multiple-node BBS systems, and many simple doors may not require any special attention to multi-node capabilities. However, if your door must access any data files or other resources that are to be shared among doors, it is your responsibility to coordinate access to these resources. While this section deals primarily with sharing access to files, similar principles apply to coordinating access to other resources such as CD-ROM drives or packet network connections. When sharing access to files between multiple nodes, there are generally two issues that you have to deal with: 1. Coordinating write access to files or records within a file in order that only one node is attempting to write to a file at any instant. If you do not do this, the information being written by one node may be overwritten by another node. 2. Keeping information read into memory from files up to date. Often, these two requirements go hand in hand. For instance, =============================================================================== OpenDoors 5.00 Manual End of Page 227 ------------------------------------------------------------------------------- CHAPTER 7 - DEBUGGING AND GETTING ASSISTANCE WITH OPENDOORS ------------------------------------------------------------------------------- ABOUT THIS CHAPTER ------------------------------------------------------------------------------- This chapter is perhaps the most important section of this entire manual. Here, we provide detailed instructions to help you in tracing the source of problems in programs written with OpenDoors. Included in this chapter is a step-by-step OpenDoors troubleshooting guide and a chart listing common problems and their solutions. Also included in this chapter is information on the many means available to you for getting more help with OpenDoors, including the OpenDoors support BBS, the OpenDoors EchoMail conference, and how to get in touch with me. It is strongly encouraged that you take the time to read through this chapter. TROUBLESHOOTING PROBLEMS ------------------------------------------------------------------------------- If you are experiencing difficulty with a program that you are writing using OpenDoors, it is suggested that you follow the steps listed below in order to quickly solve your problem. Also, be sure to check to "solutions to common problems" section of this manual. There are many common difficulties which people have with OpenDoors, that can easily be fixed using the instructions in the "common solutions" section. Also, if you are having difficulty solving a problem yourself, do not hesitate to get in touch with me, as I am always happy to help with any problems. In addition, you may find the other means of OpenDoors support (described latter in this chapter), invaluable in solving difficulties with OpenDoors. Keep in mind that most programs you write will have some "bugs" to begin with, and you should expect to spend at least 50% of any programming project tracing down and solving errors and bugs. While it would be nice if every program written worked correctly the first time, it is a fact of life that debugging is and always has been an important part of the software life- cycle. In fact, what most often separates the good programs from the bad is the amount of time their programmer's spend debugging and improving them. Unfortunately, it is difficult, if not impossible, to come up with a "magic formula" for debugging software. Debugging software is really more of an art than a science. However, there are some basic guidelines, which if followed, can greatly ease the task of software debugging. =============================================================================== OpenDoors 5.00 Manual End of Page 228 As with all problem solving, the secret to software debugging lies in obtaining as much information about the problem as possible. While it is sometimes possible to solve a bug by making intuitive changes in your program, or in re-writing a piece of code to solve the problem by a different means, debugging most often requires more of a "planned attack". This planned attack generally involves little more than learning as much about what is going wrong as possible. The first step in solving a bug usually lies in locating the source of the problem. Once you have located the problem, solving it is often a relatively simple procedure. In locating the source of your bug, the use of a software debugger, such as the one built into the Turbo C(++) / Borland C++ integrated development environment, can be invaluable. When debugging programs written with OpenDoors, you should also follow the steps listed below, in order to obtain more information related to the problem you are trying to solve: 1.) Re-read the section(s) of this manual, your Turbo C(++) / Borland C++ manuals and your program's source code, which apply to the problem you are experiencing. 2.) Check the solutions to common problems section below. The most common problems with OpenDoors can be solved using this simple chart. 3.) Check the value in the od_errno variable, which will often provide vital clues as to the source of the problem. Use of the od_errno variable is described in the section below. 4.) If you are still stuck, please feel more than free to get in touch with me! (see the end of this chapter for information on reaching me) I am always more than happy to help with any OpenDoors or general programming problems! =============================================================================== OpenDoors 5.00 Manual End of Page 229 SOLUTIONS TO COMMON PROBLEMS ------------------------------------------------------------------------------- Below, several common difficulties with OpenDoors are listed, along with suggested solutions to these problems. If you are experiencing any difficulty with a program that you have written with OpenDoors, we would suggest that you read this section thoroughly. Here, the common problem is listed in the left margin, and the solutions listed on the right portion of the page. ------------------------------------------------------------------------------- PROGRAM 1.) Check that the compiler is able to locate the OpenDoors WON'T header file, "OPENDOOR.H". This can be accomplished either by COMPILE placing this header file in the same directory as your other header files (such as STDIO.H, etc.), or by placing the header file in the current directory. 2.) Be sure that you are linking your program with the correct library for the memory model you are using. (See the section on compiling with OpenDoors). Also be sure that both the source code file for your program (such as EZVOTE.C) and the library file are listed in your project file, and that the project file is loaded. For more information on compiling programs written with OpenDoors, see page 25. 3.) If you have tried the above solutions, and your program still won't compile, then the problem is most likely an error in your source code file. If you are unable to resolve your problem, feel free to get in touch with me. ------------------------------------------------------------------------------- SCREEN If you are using the od_clr_scr() function to clear the screen, WILL NOT but are not getting any results, this is likely because the user CLEAR online has screen clearing turned off. If you wish to force screen clearing regardless of the user's screen clearing settings (this is probably not a good idea), use the function call od_disp_emu("\xc", TRUE); ------------------------------------------------------------------------------- ALT-J KEY If you press the Alt-J function key, but do not get any results, DOES NOT your problem is likely as a result of lack of memory. If enough WORK memory is not available to load the command processor (usually COMMAND.COM) when the Alt-J function key is pressed, OpenDoors will automatically return to the door. =============================================================================== OpenDoors 5.00 Manual End of Page 230 ------------------------------------------------------------------------------- FIXUP This problem was probably caused by a mismatch between your OVERFLOW memory model selection in your compiler, and the memory model ERROR library you are using. See the section on compiling programs with OpenDoors for more information on the correct library you should be using for your memory model selection. =============================================================================== OpenDoors 5.00 Manual End of Page 231 OPENDOORS SUPPORT ------------------------------------------------------------------------------- The powerful and easy to use door toolkit and this comprehensive manual are only two portions of how OpenDoors helps you to write BBS door and similar programs. The third element of OpenDoors is the extensive OpenDoors support mechanisms. The OpenDoors EchoMail conference and support BBS each give you a chance to share ideas and source code with other OpenDoors programmers. You can also receive help learning OpenDoors or solving difficulties from the OpenDoors echo and BBS. In addition to these sources, I am also more than happy to answer any of your questions, or hear any suggestions for future versions of OpenDoors. The remainder of this chapter provides more information on the various sources of OpenDoors support. Also keep your eyes open for the "OpenDoors Tech Journal", which will soon be available. Included in this newsletter will be information on OpenDoors and future versions, questions and answers about OpenDoors and BBS door / utility programming in general, sample source code, and much more. THE OPENDOORS SUPPORT BBS ------------------------------------------------------------------------------- One of the many means of receiving OpenDoors support is via the OpenDoors BBS. Below is an outline of some of what is available from the OpenDoors BBS: - The newest version of this package is always available for download. - Also available for download is example source code and other files which you may find helpful when writing programs with OpenDoors. - Access to the OpenDoors support conference where OpenDoors programmers can share ideas, source code, and receive help with difficulties or with learning OpenDoors. - Get in touch with me with any questions, comments, suggestions or bug reports. - Other files by yours truly, which may be of use in you programming, such as a registration key system, and so on. =============================================================================== OpenDoors 5.00 Manual End of Page 232 All users receive full access upon their first call to the OpenDoors BBS. The North American phone number for the support BBS is: +1 613 526 4466 Note that if you are calling from outside of North America, you may have to add the appropriate long distance routing codes to the phone number. If you are having difficulty getting through to the BBS (ie, you get a BUSY signal), it may be best to try again in ten to twelve hours time. Since the BBS system is sometimes used for beta test purposes, it may be unavailable for several hours at a time. The OpenDoors support BBS also has a FidoNet address, 1:243/8. If you are interested in a list of files available from the support BBS, simply file-request "FILES". To receive the newest version of OpenDoors, you can file-request "ODOORS". THE OPENDOORS SUPPORT CONFERENCE ------------------------------------------------------------------------------- Also available to OpenDoors users who are a member of FidoNet or other EMail networks is the OpenDoors EchoMail support conference (tag-name "OPENDOORS"). The OpenDoors support conference is devoted to OpenDoors and BBS door and utility programming in general. As with the OpenDoors support BBS, this conference gives people programming with OpenDoors a chance to share ideas and source code. It also is a forum for receiving help either learning OpenDoors, or with a specific difficulty. Bug reports, suggestions and information on future versions of OpenDoors is also available in the OpenDoors conference. For more information on the OPENDOORS echo, please feel more than free to get in touch with me. GETTING IN TOUCH WITH ME ------------------------------------------------------------------------------- If you have any questions about OpenDoors, would like help with any programs that your are writing, or have any suggestions for future versions of OpenDoors, please feel free to get in touch with me. You can get in touch with me by any of the following means: - By calling the OpenDoors support BBS. Information on the support BBS is provided earlier on in this chapter. - By electronic mail. My FidoNet NetMail address is: 1:243/8 ***SEE NOTE BELOW*** =============================================================================== OpenDoors 5.00 Manual End of Page 233 My Internet address is: brian@bpecomm.ocunix.on.ca My CompuServe ID is: 75122,2303 While I would like to be able to reply to all NetMail messages by CrashMail, I am afraid I simply can not afford to do this. So, if you choose to send NetMail, please indicate whether you would like me to reply by routed NetMail (this may not work, if routed NetMail is not available in your area), or to place the message on hold for you to poll and pick up. - By writing a message to me in the OpenDoors support EchoMail conference. For more information on the OPENDOORS echo, see the previous section of this chapter. - By conventional mail. My postal address is: Brian Pirie Apt. 1416 - 2201 Riverside Dr. Ottawa, Ontario Canada K1H 8K9 I try to respond to all correspondences as soon as possible. However, it is possible that it may take slightly longer to reply to your message, if you are asking a question that requires time for me to get an answer, or if I happen to be away for a few days. If you are having some sort of difficulty with OpenDoors, the more detailed information you supply (such as source code to the program that is causing the problem, how to duplicate the problem, and so on), the more quickly I will be able to determine the source of your problem. Also, before you write about a problem with OpenDoors, you may wish to be sure that you have read and followed the instructions in the section on troubleshooting, found on page 228. While I do not mind taking the time to answer any questions related to OpenDoors, you may be able to save yourself the time of writing and waiting for a response - simply by following the instructions in the troubleshooting section. More often than not, the answer to questions I receive is already in this manual. If you have suggestions for enhancements or additions for future versions of OpenDoors, and are sending your suggestions by =============================================================================== OpenDoors 5.00 Manual End of Page 234 conventional mail, it would be easiest for me if you sent your suggestions on the suggestion form, located on page 21. If you have a BBS system, for which you would like to see support added, and either have the technical information on that BBSes structures, or know where I could get this information, please let me know. =============================================================================== OpenDoors 5.00 Manual End of Page 235 ------------------------------------------------------------------------------- APPENDIX A - CONTENTS OF PACKAGE ------------------------------------------------------------------------------- OpenDoors is usually distributed in the form of a single, compressed archive file. Thus, you should have received this version of OpenDoors in a file whose name began with ODOORS40. The files listed below should be included in your OpenDoors package. If any of these files are missing, you will probably want to look for the most recent version of OpenDoors from another source. Each file contains the same date and time. The time listed in a file's directory entry represents the version number it belongs to, and it's date is the date of that version's release. Hence, a file with a time of 4:00 is part of OpenDoors 4.00. This is intended to help in distinguishing between a file that is part of the current version of OpenDoors, and one that is part of an older version. MISCALENEOUS FILES FILE_ID.DIZ Description of the OpenDoors package DORINFO1.DEF Sample door info file for testing doors DOOR.CFG Sample OpenDoors configuration file EXAMPLE PROGRAMS EX_HELLO.C Demonstrates how simple a door can be EX_CHAT.C Split-screen sysop chat program EX_MUSIC.C Example of ANSI music in OpenDoors EX_SKI.C Simple slalom skiing action game EX_VOTE1.C Steps in building EZVote polling program EX_VOTE2.C " " EX_VOTE3.C " " EX_VOTE4.C " " EX_VOTE5.C " " EZVOTE.EXE Compiled version of EX_VOTE5.C THE LIBRARY FILES ODOORS.LIB Small memory model library ODOORM.LIB Medium memory model library ODOORL.LIB Large memory model library ODOORH.LIB Huge memory model library THE HEADER FILE OPENDOOR.H OpenDoors #include .Header file OPENDOORS DOCUMENATION ORDER.FRM Easy-to-print order form OPENDOOR.TXT OpenDoors programmer's manual; this file =============================================================================== OpenDoors 5.00 Manual End of Page 236 ------------------------------------------------------------------------------- APPENDIX B - CHANGES FOR THIS VERSION ------------------------------------------------------------------------------- Below is a list of enhancements and changes between OpenDoors 4.10 and OpenDoors 5.00. A File containing a complete history of OpenDoors is available for download from the OpenDoors support BBS (see page 232). Version 5.00 represents several major steps forward for OpenDoors. In addition to numerous bug fixes and minor improvements, a number of major new features have been added to this version. These include an optional multiple personality system which allow the sysop to choose the status line and function key style they prefer. This version also adds text-mode support for RIP (Remote Imaging Protocol) graphics, and adds a group of advanced ANSI/AVATAR/RIP functions for scrolling areas of the screen, saving and restoring portions of the screen and creating pop-up windows and menus. Also new in this version is support for compilers other than Borland/Turbo C(++), such as compilers from Microsoft. Version 5.00 also adds built-in communications support, making the use of a FOSSIL driver optional. Furthermore, direct support for additional BBS systems has been added. The list below provides more detail of the changes and new features in version 5.00: - The nonstop key ([=]) now works correctly during FILES.BBS listing. - New door information file formats now supported include: RA 2.00 EXITINFO.BBS. - If the TASK environment variable is set, OpenDoors will now use its value to determine the current node number. - The od_control.od_spawn_freeze_time variable now works correctly. Previously, the user's time would always be frozen during od_spawn...() execution, regardless of the value of this variable. - A new feature known as the "Multiple Personality System" has been added to this version. If you choose to include the Multiple Personality System in a door, the sysop will be able to specify which of a number of "personalities" should be used. Each personality defines the statusline appearance and function keys seen by the sysop, and has no effect on the door's operation from the user's standpoint. OpenDoors 5.00 includes personality definitions for WildCat, RemoteAccess, PC-Board, and it's own simplified RA style status lines. You can also define your own personalities by writing a personality =============================================================================== OpenDoors 5.00 Manual End of Page 237 definition function. If your choose not to include the Multiple Personality System in a door, you will still be able to define which single personality you wish OpenDoors to use. - This version of OpenDoors can be used with a larger variety of compilers than where supported by the previous version. OpenDoors 5.00 is known to work with all versions of Turbo C, Turbo C++, Borland C++, Microsoft C, Microsoft C++, Quick C and Visual C++. It should also work with any other MS-DOS based ANSI C compiler that supports the Microsoft/DOS .OBJect and .LIBrary file formats. - A new diagnostics feature has been added to OpenDoors, which allows you to determine the reason for the most recent OpenDoors function failure. When any OpenDoors function returns a failure condition, it also sets the new od_control.od_error variable to indicate the reason for the failure. - Added additional definitions to OPENDOOR.H, to map names of OpenDoors functions and variables with the word "colour" from the U.S. spelling "color". In other words, both od_set_colour() and od_set_color() are now recognized by OpenDoors. - The od_list_files() now supports more intelligent path specifications. If the parameter to od_list_files() is NULL or empty, it will search for a FILES.BBS file in the current directory. If a directory path is specified, it will look for a FILES.BBS in that directory. If a full directory and filename are specified, the specified filename will be used in place of FILES.BBS. - To save space, the compact memory model library is no longer included in the normal OpenDoors package. The compact memory model library is now available seperately. - A new function, od_set_dtr(), has been added to allow the DTR line to the modem to be manually controlled. This can be useful in writing programs where you wish to force the modem to hangup, such as a call-back verification door. - Added additional support for various DOS multitasking environments. OpenDoors is now specifically Microsoft Windows aware. OpenDoors also now gives up time to other waiting tasks when it is idle during chat mode. - The od_edit_str() "M" mode now capitializes a character following a dash '-' character. - When transmitting more than one character at a time, OpenDoors now uses the FOSSIL trasfer block function, =============================================================================== OpenDoors 5.00 Manual End of Page 238 instead of multiple calls to the transfer character function. This should help to improve performance over high speed connections when running on slow PCs or under multitasking environments. - OpenDoors 4.10 would not correctly change the display colour from high-intensity back to low-intensity. This problem has been fixed. - OpenDoors now recognizes DORINFO?.DEF filenames with alphabetical identifiers (ie, DORINFOA.DEF thru DORINFOZ.DEF) for nodes 10 thru 35. - Improvements have been made to the logfile system. An exit at errorlevel zero no longer causes garbage to be written to the logfile. The logfile functions have been made more reliable when operating under low stack availability conditions. In the past, if a large number of local variables where allocated on the stack, the logfile functions would fail, often writing garbage to the logfile. When the user pages the sysop for chat, the user's reason for wishing a chat is also written to the logfile. - Support for text-mode RIP (Remote Imaging Protocol) graphics has been added. Because this version of OpenDoors always operates in DOS text-mode, none of the graphics mode RIP features (such as drawing lines, circles and displaying icons) will appear on the local screen. Plans for a version of OpenDoors that will operate in graphics mode and optionally display graphics locally are currently under consideration. In this version, RIP support includes a number of new features. OpenDoors will now recognize the RIP setting passed in an RA 2.00 EXITINFO.BBS file and WildCat DOOR.SYS file, and also allows the RIP setting to be specified in a custom door information file. The od_send_file() and od_hotkey_menu() functions will now search for files with .RIP, .AVT, .ANS and .ASC extensions. When displaying RIP graphics to the remote user, a pop-up window appears on the local screen, indicating to the sysop which file is being displayed. - A set of new functions have been added to permit advanced screen manipulations. These functions include od_gettext() and od_puttext() to save and restore portions of the screen, and od_save_screen() and od_restore_screen() to save and restore the entire screen. od_scroll() can be used to scroll any portion of the screen upwards or downwards. od_save_screen() and od_restore_screen() will operate in any mode, but the other functions require ANSI/AVATAR/RIP mode to be available. =============================================================================== OpenDoors 5.00 Manual End of Page 239 - Three additional functions, od_window_create(), od_window_remove() and od_popup_menu(), have been added to facilitate the creation of popup windows and menus. When such a window or menu is removed from the screen, the are of the screen "under" the window is returned to it's original state. This allows you to create multiple overlapping windows within a door program. The od_popup_menu() function creates a popup window with a menu from a simple menu definition string. The user can select an option from this menu by pressing the key associated with an option, or by moving a menu selection bar using their arrow keys. These three functions require an ANSI/AVATAR/RIP mode to be available. - A new function, od_chat() has been added, to allow you to explicitly invoke the OpenDoors chat mode from within your program. - A new setting variable, od_control.od_always_clear has been added. When set to TRUE, od_clr_scr() will always clear the screen, regardless of the user's screen clearing setting. When set to FALE, od_clr_scr() will only clear the screen if the user has screen clearing enabled. - It is now possible to configure the errorlevels OpenDoors exits with under various circumstances, such as when the user runs out of time remaining online. See the od_control.od_errorlevel variable - A new setting variable, od_control.od_force_local, can be used to easily force OpenDoors to operate in local mode. Using this variable you can easily add a command line parameter such as "-local" to allow the sysop to force your door to operate in local mode. When OpenDoors is forced into local mode using this variable, it does not look for a door information file, and uses default settings for the user's name, etc. - OPENDOOR.H now sets structure packing to single byte alignment for the od_control structure when Borland and Microsoft compilers are being used. In the past, programmers using OpenDoors have experienced difficulties the od_control structure when the compiler has been set to use word packing. - OpenDoors now closes the FOSSIL driver prior to performing a spawn or sysop DOS shell. This allows doors or other communications programs which use the FOSSIL driver to be executed while the door's execution is suspended. - When used with a FOSSIL driver, OpenDoors normally changes the BPS rate to that passed from the BBS (if the =============================================================================== OpenDoors 5.00 Manual End of Page 240 BBS passes a valid FOSSIL BPS rate). This BPS rate setting may now be disabled by setting the DIS_BPS_SETTING bit of the od_control.od_disable variable. - A function hook has been added to allow you to install a function to be called whenever od_kernel() executes (od_control.od_ker_exec). Another function hook, od_control.od_time_msg_func, can be installed to override OpenDoor's time limit warning messages. - A new array, od_control.od_hot_function, allows the you to define functions to be called when any of the programmer-defined sysop hotkeys have been pressed. - A function hook, od_control.od_no_file_func, has been added. This function will be called whenever OpenDoors is unable to find or read a door information file. This allows you to add your own door information file reader, or to provide a local login prompt when no door information file is present. - Previously, OpenDoors would stop correctly updating the user's remaining time at midnight when running under certain BIOSes. This problem has been fixed. - The current display colour attribute can now be accessed through an control structure member, od_control.od_cur_attrib. - od_send_file() and od_hotkey_menu() no longer pause with a "Continue?" prompt prematurely in files that have line lengths greater than 254 characters. - The local keyboard may now be disabled by setting the DIS_LOCAL_INPUT bit of od_control.od_disable. This only affects the sysop's input in circumstances that input is also accepted from the remote user; this setting has no effect on the sysop function keys. A new function hook: - void (*od_control.od_local_input)(int); has been added. If set, this function will be called whenever the sysop presses a non-sysop-function key on the local keyboard. - od_control.od_clear_on_exit now controls whether the screen is cleared before shelling or executing od_spawn...(), in addition to before OpenDoors shuts down. =============================================================================== OpenDoors 5.00 Manual End of Page 241 - od_page() now restores the original display colour before returning. - It is now possible to display an entire string of characters with terminal emulation, using the new function od_disp_emu(). - OpenDoors will now display a small popup window when disconnecting the current connection. - A new variable, od_control.od_in_buf_size, can now be set prior to calling any OpenDoors function to set the size of OpenDoors combined local/remote keyboard input buffer. By default, this buffer is 256 bytes in size. - Previously, there were a number of OpenDoors API functions that would not correctly initialize OpenDoors if they were the first function called in the program. This has been fixed. - To facilitate setting of bps rates up to 115,200, od_control.baud is now an unsigned long. - A new setting, od_control.od_no_ra_codes, has been added to disable the use of RemoteAccess/QuickBBS control codes by od_send_file()/od_hotkey_menu()/od_disp_emu(). The RemoteAccess/QuickBBS ASCII 1 "pause for key" is also now recognized. =============================================================================== OpenDoors 5.00 Manual End of Page 242 ------------------------------------------------------------------------------- APPENDIX C - FUTURE VERSIONS ------------------------------------------------------------------------------- While I cannot make any promises about what features and changes will be seen in future versions of OpenDoors, I would like to take a moment to tell you a bit about some of the features you can expect to see in future versions of OpenDoors As you are probably already aware, OpenDoors is a constantly evolving package. To help meet the needs of programmers working with OpenDoors, nearly every idea and change that is made to the package results from the suggestions and comments I receive from the people using OpenDoors. For this reason, I will most likely continue to produce new versions of OpenDoors for as long as there is a demand and ideas for upgrades. There certainly is no shortage of either of this right now. Some of the features that are currently in the works for upcoming versions of OpenDoors include: - Support for additional programming operating systems. - Additional RIP graphics support, including display of RIP images on local screen. - A built-in automatic ANSI/high-ASCII to plain-ASCII conversion system. - More advanced ANSI/AVATAR terminal routines, such as screen save and restore, window scrolling, and more. - Direct interfacing with more BBS systems, including Maximus direct interfacing. - AVATAR compression. - Built-in ANSI music support, including optional local sound. - Improvements to existing OpenDoors features, such as more configuration file options, multiple log file formats, and many smaller changes. - Since the user's time remaining field is not consistently written to the EXITINFO.BBS file (some packages write the actual time remaining, while others write the users total time limit for the connection, to this field), OpenDoors now reads this information from the DORINFOx.DEF file =============================================================================== OpenDoors 5.00 Manual End of Page 243 that must also always be present when an EXITINFO.BBS is used. =============================================================================== OpenDoors 5.00 Manual End of Page 244 ------------------------------------------------------------------------------- APPENDIX D - SPECIAL THANKS ------------------------------------------------------------------------------- There are a great many people who I would like to thank, for their suggestions, ideas and assistance in making OpenDoors what it is today. In a way, I feel somewhat reluctant to list people names, as I will no doubt forget someone important. Among those I would like to thank are: - Everyone who has taken the time to register OpenDoors - All those who participate in the OpenDoors conference, who provide many suggestions, bug reports and words of encouragement. - In particular I would like to thank the following people for their devotion of time, in the form of suggestions, bug reports, sending information, etc.: Ron Bergeron Scott Burkett Joel Downer Mike Hartmann Winfried Hirsch Robert La Ferte Ron Le Blanc Bill Meck Bill Pavich Mark Williamson =============================================================================== OpenDoors 5.00 Manual End of Page 245 ------------------------------------------------------------------------------- GLOSSARY ------------------------------------------------------------------------------- ANSI "ANSI", often referred to as "ANSI Graphics", is a display protocol which allows (in this case), BBS software to perform certain display functions such as changing the colour of displayed text, or moving the location of the cursor on the screen. The majority, though not all, BBS users use terminal software with ANSI graphics capabilities. Any users that do not have graphics display capabilities, will be using ASCII mode, instead. Compare ASCII and AVATAR. ASCII ASCII (pronounced "ass-key") is an acronym for "American Standard Code for Information Interchange", and is a definition of a set of 128 letters, number and symbols, which can be displayed by computer systems. Also, when used within the domain of BBS software, ASCII mode is often used to refer to the lack of any graphics display capabilities, such as ANSI or AVATAR. When ASCII mode is used, characters can only be displayed in standard Teletype fashion, one after another. Also, colour and cursor positioning functions are not available in ASCII mode. Compare ANSI and AVATAR. AVATAR AVATAR is an acronym for "Advanced Video Attribute Terminal Assembler and Recreator". AVATAR is a graphics display protocol, similar to ANSI. Like ANSI-graphics, AVATAR graphics allow functions such as cursor positioning, and colour changing. However, AVATAR also offers many capabilities not available from ANSI, and performs the same functions as ANSI much more quickly. AVATAR graphics is less common than both ANSI or ASCII, but is becoming more popular as time goes by. Compare ASCII and ANSI. BAUD For our purposes, the term "baud" or "baud rate" refers to the speed at which data is being sent from one computer to another over a modem. Sometimes referred to as "BPS". BIT-MAPPED As with Boolean values, described below, bit mapped flags FLAGS are used to indicate whether or not various conditions exist. (For example, whether or not a certain setting is enabled, or whether or not a particular event has occurred.) However, unlike Boolean variables, a single bit-mapped flag represents more than one of these TRUE/FALSE values. In fact, each bit (BInary Digit), which makes of the variable can be used to represent a separate TRUE/FALSE state. (ie, each bit maps to a particular piece of information, and hence the term "Bit Map"). For an example of using bit-mapped flags, let us take a case of a single "unsigned char" which contains three independent TRUE/FALSE values. We will call this variable user_info, and it =============================================================================== OpenDoors 5.00 Manual End of Page 246 will indicate whether or not a user has ANSI graphics, whether or not the user has screen clearing turned on, and whether or not the user has end-of-page "more" prompts enabled. Internally, the bits of the user_info variable will be as follows: Bit: 7 6 5 4 3 2 1 0 | | | | | +--- ANSI Graphics | +----- Screen Clearing +------- More prompts In this case, we will have three constants which we define in order to simplify access to these bit-mapped flags, as follows: #define ANSI_GRAPHICS 0x01 #define SCREEN_CLEARING 0x02 #define MORE_PROMPTS 0x04 Note that normally within OpenDoors, these constants will be defined for you, and you will have no need to know what their values are, nor in which bit which piece of information is stored. Using bit-mapped flags, you are able to set or clear any of the individual flags, and check whether any of the flags are set, using these simple methods: (Not that a set flag is the equivalent of a Boolean value of "True", and a cleared flag is the equivalent of a Boolean value of "False".) Set Flag: variable |= FLAG_CONSTANT; Clear Flag: variable &=~ FLAG_CONSTANT; Test Flag: variable & FLAG_CONSTANT Where "variable" is the name of the bit-mapped flag variable, and "FLAG_CONSTANT" is the pre-defined constant for the individual setting. To return to our example, you could turn on the user's ANSI graphics setting by using the line: user_info |= ANSI_GRAPHICS; and to turn off screen clearing you would: user_info &=~ ANSI_GRAPHICS; To perform an action (such as waiting for the user to press [Return]/[Enter]) only if "More" prompts are enabled, you would: if(user_info & MORE_PROMPTS) { ... /* Whatever you want */ } =============================================================================== OpenDoors 5.00 Manual End of Page 247 BOOLEAN Many of the variables used within OpenDoors contain a VALUES "Boolean Value". A Boolean value is a two-state variable, who's states are referred to as "True" and "False'. If the variable contains a value of "True", it indicates that a certain condition is so, and if it contains a value of "False", it indicates that the condition is not so. For example, a Boolean variable "wait" might be used to indicate whether or not OpenDoors should wait for the user to press a key, or continue without waiting. In this case, a value of "True" would indicate that OpenDoors should wait, and a value of "False" would indicate that it should not wait. Note that in the C programming language, there is no actual Boolean variable type - usually a char or an int are used to store Boolean values. The constants TRUE and FALSE, as defined in the OPENDOOR.H file, are used to represent the two states of a Boolean value. Thus, to set a Boolean variable "wait" to the value of "True", you would use this line: wait=TRUE; and to set the variable "wait" to "False", you would: wait=FALSE; However, you SHOULD NOT test whether a Boolean variable is "True" or "False" by using the C compare (==) operator, as the value "True" will not always be the same numerical value. (Actually, the TRUE constant represents just one of many possible numerical values for "True"). Instead, to perform an action of the "wait" Boolean variable is "True", you would: if(wait) { ... /* Whatever you want */ } and to perform an action if the "wait" Boolean variable is "False', you would: if(!wait) { ... /* Whatever you want */ } For interest sake, Boolean values are named after the 19th century English mathematician, who studied formal logic, and created Boolean algebra - an algebra which deals with TRUE and FALSE values. =============================================================================== OpenDoors 5.00 Manual End of Page 248 BPS BPS is an acronym for "Bits Per Second". For our purposes here, the terms BPS and BAUD refer to the same thing. CARRIER The term "Carrier" or "Carrier Detect" refers to a signal which DETECT most modems send to the computer, which indicates whether or not the modem is currently connected to (communicating with) another modem. The door driver module of OpenDoors, as with most other BBS software, uses the status of this carrier detect signal in order to know whether the user is still connected to the BBS computer. Thus, if the user hangs up, or if something goes wrong and the connection is lost, OpenDoors is able to detect this state, and exit to the BBS. The BBS will then also detect that the carrier signal has been "lost", and will reset itself, and then again be ready to accept calls. CHAT MODE The term "chat mode" refers to a means by which the sysop can communicate with a user of the BBS / door. During sysop chat, anything typed by the sysop will appear on the user's screen, and likewise, anything typed by the user will appear on the sysop's screen. Sysop chatting is available on both single and multi-line systems. Sysop chatting is initiated by the sysop, either at any time a user is online, or specifically in response to a sysop page. DOOR A "door" is a program that runs as part of a BBS system, but which is separate from the central BBS software (RemoteAccess, Maximus, QuickBBS, PC-Board, etc.) itself. A door provides additional features not built into the BBS software, such as on- line games, on-line shopping services, voting booths, match making systems, access to special files or messages, and much much more. Since the user also communicates with the door online, as they do with the BBS, it may not necessarily be obvious to the user that the door is even a separate entity from the central BBS software itself. DOOR Also referred to as a "drop file", "exit file", or "chain INFORMATION file". The door information file is a file passed from the FILE central BBS software to a door program, providing it with information about the user who is online, the BBS the door is running under, and the current modem connection. The door information file may also be used to pass changed information back to the BBS, such as the amount of time that the user has used in the door. OpenDoors takes care of all of the work involved in reading and writing the door information file for you, as described in the "Basics of Door Programming" section, in chapter 4. Examples of door information files supported by OpenDoors include: DOOR.SYS, EXITINFO.BBS, DORINFO?.DAT, SFDOORS.DAT, CALLINFO.BBS and CHAIN.TXT. =============================================================================== OpenDoors 5.00 Manual End of Page 249 ECHO See "Local Echo". FOSSIL The FOSSIL driver, or simply FOSSIL, is a TSR program or DRIVER device driver which OpenDoors can optionally make use of in order to communicate with the modem. The FOSSIL driver is loaded prior to starting up the BBS or your door, usually from the AUTOEXEC.BAT or CONFIG.SYS files. The two most commonly used FOSSIL drivers are X00 and BNU. (FOSSIL is an acronym for "Fido/Opus/SEAdog Standard Interface Layer", although it has now become the standard for nearly all BBS software.) FOSSIL drivers are also available for other specialized serial port hardware, such as the popular "DigiBoard" multi-port serial card. LIBRARY The term "library" or "library file" is a collection of precompiled functions and variables that can be used in other programs. All of the features, capabilities and functions of OpenDoors that you can make use of are contained within the OpenDoors library files. (Likewise, the C runtime library, consisting of the familiar functions such as fopen(), printf() and atoi(), is also contained within a library file.) For more information on the different OpenDoors library files, see the section that begins on page 25. Library files are actually a collection of individual object files. When you compile a program that makes use of a library file, only those portions of the library file that your program actually uses are linked into your program's .EXE file. Library files can be identified by a .LIB extension. LOCAL MODE The term "local mode" refers to a mode in which a BBS system or door program may operate. In local mode, the BBS/door behave as they would if a user were connected via modem to the BBS, except that all display and input is done simply on the BBS software, but not through the modem. Local mode allows the sysop or another person with direct access to the BBS computer to use the BBS/door software, either for their own user, or for testing that the software is running correctly. When programming door software, local mode can be very useful in testing and debugging the door, without requiring the door to be connected to a remote system. All doors written with OpenDoors automatically support local mode operation. Compare "Remote". LOCAL ECHO The term "Local Echo" refers to a door displaying the same characters which are sent to the modem on the local screen ("Output Window"). This allows the sysop to view the same information that is sent to the user's system, in the same manner that it will appear on the user's screen. =============================================================================== OpenDoors 5.00 Manual End of Page 250 LOCKED (eg. "Locked Baud Rate", "Locked BPS Rate", "Locked Commport Speed", etc.) Usually, the communication port to which a modem is connected is set to transfer data at the same BPS rate as the rate at which the modem is communicating. However, many high speed modems allow very high speed data transfer by using built- in data compression methods. In this case, the actual rate of data transfer can easily exceed the true BPS rate of the connection. As a result, the BPS rate of the port is kept a single speed, faster than any of the true modem connections, in order to increase modem speed performance. This is referred to as locking the commport BPS rate. OpenDoors has full support for the use of locked BPS rates. LOG FILE A log file is a normal text file in which BBS software records all major activities that have taken place. As such, the log file permits the sysop, to review what activities have taken place on the BBS during the time which they have been away from the computer. A log file can be helpful in identifying system errors or crashes that have occurred, in alerting the sysop in the case that any users have been causing problems on the BBS, or in simply letting the sysop know who has called recently, and what when they did when they called. MODEM A device connected to a computer which permits it to communicate with other computers, usually over standard telephone lines. OBJECT FILE An object file contains the compiled version of a source code file of a program. The source code file may be a .C file, .CPP file, .ASM file, .PAS file, .BAS file, or any number of other extensions associated with other programming languages. When any of these language's source code files are compiled, a .OBJ file is created containing information such as the executable code, and names of symbols (variables and functions) that are to be shared with other .OBJ files. In order to produce a .EXE file that may be executed, a process known as linking must be performed. During the link process, one or more object files composing your program are combined, along with the necessary code from any library files being used, in order to produce the final .EXE file. ONLINE In the case of BBS software and BBS door programs, the term online refers to the state of a user using the BBS. Usually, the user will be connected to the BBS from a remote location, using a modem. However, it is also possible that the user will be using the actual BBS computer, with the software operating in "local mode". OUTPUT WINDOW The local screen of the BBS on which BBS software is running is usually divided into two sections. At the bottom of the screen, =============================================================================== OpenDoors 5.00 Manual End of Page 251 there is often a one or two line status line, which displays information to the sysop about the BBS and the user who is currently online. The rest of the screen is usually an "output window", in which the information which is being displayed to the user, is also displayed on the local screen. In some cases, there will be no status line, in which case the entire screen will be the output window. Usually, the upper 23 lines of the screen in an OpenDoors door will be the output window, with the bottom two lines being the status line. However, it is possible to disable the OpenDoors status line, in which case the entire screen will be the output window. See also "Status Line" PAGE See "SYSOP PAGE" PARAMETER In the C programming language, many tasks are accomplished by calling functions. When a function is called, one or more pieces of information may be passed to a function, in the form of parameters. For example, a function used to set the foreground and background colour of displayed text might accept two parameters, one for each of the two colour settings. In this example, a function such as od_set_colour(), would be called as follows: od_set_colour(D_GREEN,D_RED); In this case, D_GREEN, the foreground colour, is the first parameter, and D_RED, the background colour, is the second parameter. In C, parameters are enclosed in parentheses, ( and ), which are located after the name of the function to be called. Each parameter is then separated by a comma character. If a function does not accept any parameters, the parentheses will have nothing between them. (ie. od_clr_scr() ). REGISTRATION This is a demonstration version of OpenDoors, which may only be used under limited circumstances, for a limited period of time. If you wish to continue using OpenDoors after this "evaluation period", you must "register" it. For more information on registering OpenDoors, please see chapter 2 of this manual. REMOTE When used in reference to BBS software or door programs, the term remote is used to refer to a user or computer that is communicating with the BBS, for a distant location, by use of a modem. Compare "Local Mode" RIP "RIP", "RIPScrip" or "Remote Imaging Protocol" is a popular graphical terminal standard that is used with BBS systems. Unlike other terminal emulation standards, such as the ANSI and =============================================================================== OpenDoors 5.00 Manual End of Page 252 AVATAR modes supported by OpenDoors, RIP operates in bit mapped graphics mode, allowing features such as lines, circles and icons to be drawn on the remote screen. OpenDoors provides support for RIP graphics, although OpenDoors operates in text mode itself. STATUS LINE Usually, the bottom two lines of the screen, as displayed by an OpenDoors door, is devoted to a status line (although this status line may be turned off). This status line will display information about the user who is online, along with information about the current state of the BBS system, and a reference to the sysop function keys. See also "Local Window". SYSOP The term sysop is a short-form for "SYStem OPerator", and refers to the individual who is responsible for running and maintaining the BBS system. The sysop is usually the only person who has direct access to the local keyboard and computer on which the BBS, BBS utilities and BBS doors are running. SYSOP CHAT See "CHAT MODE". SOURCE CODE The term "source code" refers to the original file or files that where used to produce a library or executable program. The source code files contain the language statements or commands that are directly written by the programmer. These source code files are then compiled to produce an executable file that may be "run". SYSOP PAGE Sysop paging refers to the process whereby a user of the BBS system may call or page for the sysop's attention, when they wish to "chat" with the sysop, and can be thought of as being similar to the ringing of a telephone. When a user pages the sysop, the BBS system will produce some sort of sound, which the sysop may elect to respond to if they are within hearing range of the computer. The most common reasons for a user to page a sysop include the case that they are having difficulty with some aspect of the BBS, that they have a question, or if they are simply interested in having a friendly conversation with the sysop. Obviously, since the sysop may not wish to be disturbed by users paging at certain times (such as when they are in bed), most BBS software provides controls to allow you to control paging. These features might include the ability to set hours for each day of the week during which paging will be permitted, and the ability to temporarily override the ability of some or all callers to page the sysop. USER When applied to computers in general, the term user simply refers to any person using the computer hardware and software. =============================================================================== OpenDoors 5.00 Manual End of Page 253 However, when applied particularly to BBSes, the term user refers specifically to a person who calls the BBS, to carry out activities such as communicating via messages or chatting, uploading and downloading files, or using doors. Often, the term user is used in contrast with the term sysop. In this case, users are all of the people who call and user the BBS, other than the sysop themselves. WINDOWS Windows, or Microsoft Windows, is a computer operating environment which runs on IBM PC and compatible computers, and such runs in conjunction with the MS-DOS or PC-DOS operating systems. This version of OpenDoors can only be used to produce DOS-mode programs, which will run under DOS, DESQview, Windows and OS/2. =============================================================================== OpenDoors 5.00 Manual End of Page 254 ------------------------------------------------------------------------------- INDEX ------------------------------------------------------------------------------- About This Manual, 24 Access Level, 175 Alias, 168 ANSI Graphics, 131, 163, 246 Archive Contents, 236 ASCII Chart, 86 ASCII Mode, 246 AVATAR Graphics, 114, 131, 164, 246 Baud Rate, 152 BBS Information, 156 BBS Name, 162 BBS Systems, 29 Before Exit Function, 188 Box Characters, 182, 187 BPS Rate, 152 Built-In Function Keys, 207 Caller Information, 156 Carrier Detect, 51, 96 Chat, 38, 101 Chat Mode, 32, 101, 249 Colour Attribute Codes, 125 Colour Constants, 129 Colour Customization, 210, 220, 223, 227 Colour Functions, 42 Colours, 105, 125, 128 Common Problems, 230 Compiler Errors, 230, 231 Compiling With OpenDoors, 25 Custom Function Keys, 208 Debugging, 24, 228 Demo Version, 9 Display Functions, 42, 64 Displaying Text, 28, 41, 42, 60, 62, 64, 89, 105, 110, 114, 121 Door Driver Functions, 40 Door Driver Module, 5, 28, 40 Door Functions, 45 Door Information File, 29, 31, 147, 156 Door Settings, 179 DORINFOx.DEF File, 31 DOS Shell, 32, 188, 230 Download Limit, 166 Drop To BBS Key, 33 Error Free Connection, 167 ErrorLevels, 33 Example Program - Changing Only Foreground/Background Colour, 129 Example Program - Choosing Text Colour, 126 Example Program - Clearing A Line, 56 Example Program - Dialog Box, 67 Example Program - Door And Utility In One Program, 91 Example Program - Drawing A Window, 114 =============================================================================== OpenDoors 5.00 Manual End of Page 255 Example Program - Exiting A Door, 81 Example Program - EZVote, 31 Example Program - First Door, 28 Example Program - Hanging Up In CBV Door, 51 Example Program - Hotkeyed Menu, 90 Example Program - Input Key With Echo, 110 Example Program - Pausing In A Door, 96 Example Program - Setting Door Info File Location, 148 Example Program - Shelling To DOS, 138 Example Program - Terminal Emulation, 63 Example Program - Testing Available Door Information, 156 Example Program - Testing Screen Clearing Capabilities, 57 Example Program - Transferring A File Using DSZ, 139 Example Program - User Statistics Door, 108 Example Program - Waiting For CR, 54 Exiting A Door Program, 81 Features, 5 Feedback Form, 21 File Display Functions, 43 FILES.BBS File, 98 Fossil Driver, 250 FOSSIL port, 155 Function Keys, 32, 96, 206 Future Versions, 243 Getting In Touch With Us, 233 Graphics Mode, 163, 164, 246 Hangup, 33 History, 237 Hotkeys, 89 IBM Colour Attribute Codes, 125 IEMSI Session Information, 159 Inactivity Timeout, 195, 196, 197 Input Functions, 44, 83, 84 Keyboard Buffer, 53, 96, 110 Keys, 96 Language Customization, 212 Learning OpenDoors, 28 Library, 250 LIBrary Files, 27 Line Number, 149 Linking, 25 Local Mode, 31, 196, 250 Locked, 251 Lockout, 33 Memory Models, 26, 27 Memory Swapping, 204 Modem Port, 155 Modem Settings, 151 New Version, 237 Node Number, 149 Object File, 251 od_autodetect() Function, 48 od_carrier() Function, 51 od_chat() Function, 50 =============================================================================== OpenDoors 5.00 Manual End of Page 256 od_clear_keybuffer() Function, 53 od_clr_line() Function, 55 od_clr_scr() Function, 57, 230 od_colour_config() Function, 59 od_control Structure, 29, 145 od_disable Variable, 194 od_disp() Function, 60 od_disp_emu() Function, 62 od_disp_str() Function, 64 od_draw_box() Function, 66 od_edit_str() Function, 70 od_exit() Function, 30, 81, 188, 191 od_get_answer() Function, 83 od_get_key() Function, 28, 53, 84 od_gettext() Function, 88 od_hotkey_menu() Function, 89 od_init() Function, 29, 91, 147 od_input_str() Function, 53, 94 od_kernal() Function, 30, 96 od_list_files() Function, 98 od_log_write() Function, 100 od_page() Function, 101, 202 od_popup_menu() Function, 102 od_printf() Function, 28, 105, 192 od_putch() Function, 110 od_puttext() Function, 112 od_repeat() Function, 114 od_restore_screen() Function, 116 od_save_screen() Function, 117 od_scroll() Function, 119 od_send_file() Function, 121 od_set_attrib() Function, 125 od_set_color() Function, 128 od_set_cursor() Function, 131 od_set_dtr() Function, 133 od_set_personality() Function, 135 od_set_statusline() Function, 136 od_spawn Function, 203 od_spawn() Function, 138 od_spawnvpe() Function, 140 od_window_create() Function, 142 od_window_remove() Function, 144 OPENDOOR.H File, 25, 28, 34 OpenDoors BBS, 232 OpenDoors Customization, 184 OPENDOORS Echo, 233 OpenDoors History, 237 Our Address, 233 Output Functions, 42 Output Window, 32, 251 Paging Hours, 179, 180 Paging The Sysop, 101 Pause Key, 198 Phone Number, 168 =============================================================================== OpenDoors 5.00 Manual End of Page 257 Printing, 28, 41, 42, 60, 62, 64, 89, 105, 110, 114, 121 Printing Manual, 25 Problems, 24 Product Support, 232 Project Files, 25 Registration, 9, 11, 15, 19, 20, 233, 252 Registration Form, 13, 20 RIP, 252 RIPScrip, 252 Running Doors, 29 Screen Functions, 42 Screen Length, 174 Screen Width, 175 Security Level, 175 Setting Colours, 105, 125, 128 Solutions To Problems, 230 Source Code, 9, 17, 22 Special Thanks, 245 Status Line, 32, 101, 136, 204, 205, 253 Stop Key, 198 Support, 232 Support BBS, 232, 233 Swapping, 204 Sysop Chat, 38, 101, 188 Sysop Function Keys, 206 Sysop Keys, 32, 96 Sysop Name, 161 Sysop Next Key, 33 Sysop Next Setting, 181 Sysop Page, 202 Sysop Paging, 101, 253 System Events, 160 System Name, 162 Terminal Emulator, 62, 121, 122 Terminal Emulator Control Codes, 122 Text Customization, 212 Thank-yous, 245 Time Left, 176 Timeout, 96 Troubleshooting, 24 User Handle (Alias), 168 User Information, 156 User Keyboard Off Key, 33, 53 User Keyboard Setting, 180, 181 User Name, 171 User Password, 173 User Timeout, 96 Version History, 237 Want-Chat Setting, 177 =============================================================================== OpenDoors 5.00 Manual End of Page 258