Cream of the Crop 22

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Text File | 1996-08-02 | 19KB | 463 lines

RRRRZZZZ((((1111)))) OOOOmmmmeeeennnn TTTTeeeecccchhhhnnnnoooollllooooggggyyyy IIIINNNNCCCC ((((OOOOMMMMEEEENNNN)))) RRRRZZZZ((((1111)))) NNNNAAAAMMMMEEEE rx, rc, rb, rz - Receive Files and Commands with X/Y/ZMODEM SSSSYYYYNNNNOOOOPPPPSSSSIIIISSSS rrrrzzzz [-vvvv] [-wwwwWWWWIIIINNNNDDDDOOOOWWWW] [-ttttTTTTIIIIMMMMEEEEOOOOUUUUTTTT] rrrrbbbb [-vvvvyyyy] [-ttttTTTTIIIIMMMMEEEEOOOOUUUUTTTT] rrrrcccc [-vvvvyyyy] [-ttttTTTTIIIIMMMMEEEEOOOOUUUUTTTT] _f_i_l_e rrrrxxxx [-vvvvyyyy] [-ttttTTTTIIIIMMMMEEEEOOOOUUUUTTTT] _f_i_l_e ggggzzzz _f_i_l_e ... LLLLIIIICCCCEEEENNNNSSSSEEEE AAAAGGGGRRRREEEEEEEEMMMMEEEENNNNTTTT This is a Copyrighted shareware program. Commercial use of this program is subject to licensing conditions detailed in the rz.c source code. "Commercial Use" includes any use of this program to receive files from a commercial or shareware program not published by Omen Technology INC. Registration information is provided in the file mailer.rz. Use of this program constitutes agreement to the License Agreement. SSSSUUUUPPPPPPPPOOOORRRRTTTT Users who have not purchased support may dial 900-555-7836 (900-555-RTFM) for technical assistance. There is a charge of $4.69 per minute to use this support line. Callers must be 18 years or older. Registered users encountering problems using this program on standard serial ports to transfer files with Professional- YAM or ZCOMM may call the support number listed in the Professional-YAM/ZCOMM documentation. Solutions to nearly all file transfer problems are described in the Professional-YAM/ZCOMM documentation. DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN This program uses error correcting protocols to receive files over a dial-in serial port from a variety of programs running under PC-DOS, CP/M, Unix, and other operating systems. It is invoked from a shell prompt manually, or automatically as a result of an "sz file ..." command given to the calling program. To obtain the maximum performance and full functionality of this program we recommend its use with GSZ, Professional-YAM or ZCOMM. This program is intended to act as a server for terminal programs, not to act as one. This program is not designed to be called from _c_u(_1), _t_i_p(_1), or other communications programs. Unix flavors of Omen Technology's Professional- YAM communications software are suitable for dial-out Page 1 (printed 8/2/96) RRRRZZZZ((((1111)))) OOOOmmmmeeeennnn TTTTeeeecccchhhhnnnnoooollllooooggggyyyy IIIINNNNCCCC ((((OOOOMMMMEEEENNNN)))) RRRRZZZZ((((1111)))) applications. Unix Professional-YAM supports dial-out applications with telephone directory, a powerful script language with learn function, high quality multiple protocol support, and UUCP port arbitration. RRRRzzzz (Receive ZMODEM) receives one or more files with the ZMODEM protocol. Pathnames are supplied by the sending program, and directories are created if necessary. (See the example below.) if standard output is not redirected to a file or pipe, output is appended to a file named "stdout". Normally, the "rz" command is automatically issued by the calling ZMODEM program, but defective ZMODEM implementations may require starting _r_z manually. RRRRbbbb receives file(s) with YMODEM, accepting either standard 128 byte sectors or 1024 byte sectors (Pro-YAM/ZCOMM sb ----kkkk option). The user should determine when the 1024 byte block length actually improves throughput. If True YMODEM (Omen Technology trademark) file information (file length, etc.) is received, the file length controls the number of bytes written to the output dataset, and the modify time and file mode (iff non zero) are set accordingly. If True YMODEM file information is not received, slashes in the pathname are changed to underscore, and any trailing period in the pathname is eliminated. This conversion is useful for files received from CP/M and other historical systems. RRRRcccc receives a single _f_i_l_e with XMODEM-CRC or XMODEM-1k-CRC protocol. The user should determine when the 1024 byte block length actually improves throughput without causing problems. The user must supply the file name to both sending and receiving programs. Up to 1023 garbage characters may be added to the received file. RRRRxxxx receives a single _f_i_l_e with XMODEM or XMODEM-1k protocol. The user should determine when the 1024 byte block length actually improves throughput without causing problems. The user must supply the file name to both sending and receiving programs. Up to 1023 garbage characters may be added to the received file. GGGGzzzz is a shell script which calls _s_z to command Pro-YAM or ZCOMM to transmit the specified files. Pathnames used with _g_z must be escaped if they have special significance to the Unix shell. EXAMPLE: gz "-a C:*.c D:*.h" Page 2 (printed 8/2/96) RRRRZZZZ((((1111)))) OOOOmmmmeeeennnn TTTTeeeecccchhhhnnnnoooollllooooggggyyyy IIIINNNNCCCC ((((OOOOMMMMEEEENNNN)))) RRRRZZZZ((((1111)))) If invoked with a leading ``v'', _r_z will report progress to /tmp/rzlog. EXAMPLE: ln rz vrz; rz=vrz; export rz If the RESTRICTED shell environment variable is set to 1, or if the SHELL environment variable includes _r_s_h or _r_k_s_h (restricted shell), registered copies of _r_z will not accept command uploads, absolute pathnames, references to a parent directory, will not modify an existing file, and removes any files received in error. EXAMPLE: RESTRICTED=1 rz The meanings of the available options are: ttttTTTTIIIIMMMMEEEEOOOOUUUUTTTT Change TIMEOUT to _T_I_M_E_O_U_T tenths of seconds. vvvv Verbose causes a list of file names to be appended to /tmp/rzlog . More v's generate more detailed debugging output. wwwwWWWWIIIINNNNDDDDOOOOWWWW Use a receive window of WINDOW bytes. Details in the Professional-YAM user manual. (Pro-YAM command) <_A_L_T-_2> Pro-YAM Command: _s_z *._h *._c This automatically invokes _r_z on the connected system, and sends all .h and .c files in the current directory. _s_z -_n -_R_f . This Professional-YAM command recursively follows the current directory tree (.) (Pro-YAM -R option), sends the full relative pathname (-f), for files that are newer (-n) than their copies on the destination system. _r_z | _s_o_r_t >/_t_m_p/_s_o_r_t_e_d _s_z _O_N_A_M_E=- *._l_s_t The first command manually starts rrrrzzzz with output piped to the sort command. The second command instructs Professional-YAM, ZCOMM, GSZ or DSZ to sene the files using "-" as pathname, which instructs rrrrzzzz to output the received data to its standard output. The end result is a single file containing all the lines of the .lst files sorted alphabetically. DDDDIIIIAAAAGGGGNNNNOOOOSSSSTTTTIIIICCCCSSSS Exit status is as follows: 0 for successful transfers. 1 if unrecoverable errors are detected. 2 if syntax errors or file access problems are detected. 3 if the program was terminated by a caught interrupt. Page 3 (printed 8/2/96) RRRRZZZZ((((1111)))) OOOOmmmmeeeennnn TTTTeeeecccchhhhnnnnoooollllooooggggyyyy IIIINNNNCCCC ((((OOOOMMMMEEEENNNN)))) RRRRZZZZ((((1111)))) SSSSEEEEEEEE AAAALLLLSSSSOOOO Professional-YAM, ZCOMM, DSZ, crc(omen), sz(omen), usq(omen), undos(omen) Compile time options required for various operating systems are described in the source file. SSSSEEEERRRRVVVVEEEERRRR////NNNNEEEETTTTWWWWOOOORRRRKKKK NNNNOOOOTTTTEEEESSSS Terminals on some timesharing systems are connected indirectly to the host with TTTTEEEERRRRMMMMIIIINNNNAAAALLLL SSSSEEEERRRRVVVVEEEERRRRSSSS operating over networks. Terminal servers often interfere with file transfers by "eating" control characters and/or losing data. Accessing a distant system using tttteeeellllnnnneeeetttt on a local Unix system entails the same problems. If tttteeeellllnnnneeeetttt does not work well, try rrrrllllooooggggiiiinnnn with the ----8888 option. Set the escape character to ^P (control P) which is protected by ZMODEM. When terminal servers interfere with file transfers, server commands are often available to help the problem. When possible, enable the server and modems for hardware flow control in and out. Set the terminal server to telnet transparent mode. Some typical commands are "SET TERMINAL DOWNLOAD", "set session passall", and "SET TERMINAL NO ESC", but there is no standard set of commands suitable for all terminal servers. Normally these commands are given before attempting file transfers, but one user has reported that the command must be given _a_f_t_e_r the file transfer is started(!). Until terminal server vendors improve the quality of their product, you may have to get on their case until they adequately support high performance file transfers. The telnet protcol used by the _t_e_l_n_e_t program and terminal servers uses 0xFF (377 octal) for special control functions. The 0xFF character may cause problems if it appears in the data stream, especially uploading at high speeds. With ZCOMM or Professional-YAM the 0xFF character can be protected by giving the command: set zmtxesc ? Escaping control characters with ZMODEM (sz -e) may help if the transfer gets stuck in the same place on every attempt. Professional-YAM and ZCOMM allow selection of which control characters need to be escaped. In extreme cases 7-bit transmission may be required (see the Professional-YAM/ZCOMM manual). If you encounter problems with control characters you should identify which control characters are causing the problem. Please refer to the sz -T command in sz.doc for more help. Flow control between the server and modem is often Page 4 (printed 8/2/96) RRRRZZZZ((((1111)))) OOOOmmmmeeeennnn TTTTeeeecccchhhhnnnnoooollllooooggggyyyy IIIINNNNCCCC ((((OOOOMMMMEEEENNNN)))) RRRRZZZZ((((1111)))) defective. This rarely causes a problem in interactive applications whose short bursts (a screenfull at most) fit within the available memory buffers. Streaming protocols such as YMODEM-g, long packet SuperKermit, and ZMODEM can overload the available buffering. Some terminal servers support commands to enable hardware flow control such as "TERM FLOWCONTROL HARDWARE IN OUT"; this assumes the modem attached to the server is properly configured. If the terminal server is too brain damaged to support flow control, ZMODEM lets you fake it by setting a window size. Try sz -w2048 file... to enable software flow control. Experiment with different window sizes for best results. Terminal servers are designed to accept keyboard input from human operators. They may lose data when a program sends more data to the host faster than humans type. Some servers allow larger input buffers to support file uploads. If you can upload short files (less than 100 bytes) but not longer files, try sz -w1024 file... with your uploading program. (Not all programs support this option; use ZCOMM or Professional-YAM.) When both flow control and character transparency are problems, use sz -ew1024 file... as a starting point. Sometimes the terminal server software is defective and must be corrected. Please contact the network's vendor for corrective procedures. An alternative is to install direct serial ports for users desiring to upload files. We have also encountered problems when networking software fails to pass data after a large amount of data has been sent to the host. This has happened on a PPP internet connection which prevented uploads of large amounts of data via either FTP or a ZMODEM upload (via TELNET). The PPP connection grinds to a standstill and not even PING works. The same ZMODEM/TELNET combination easily uploaded ten times as much to a nearby machine connected by Ethernet. PPPPOOOORRRRTTTT WWWWAAAATTTTCCCCHHHHEEEERRRRSSSS Some systems enforce a timeout which disconnects a user after several minutes of keyboard inactivity. Long, error free ZMODEM transfers do not generate keyboard activity (this is why ZMODEM is so efficient). Restricting the window size with Page 5 (printed 8/2/96) RRRRZZZZ((((1111)))) OOOOmmmmeeeennnn TTTTeeeecccchhhhnnnnoooollllooooggggyyyy IIIINNNNCCCC ((((OOOOMMMMEEEENNNN)))) RRRRZZZZ((((1111)))) sz -w16384 file... option generates terminal input at regular intervals even when no error correction is needed. If problems persist, try setting a packet length. sz -l1024 file... (The default ZMODEM packet length is the file length.) NNNNOOOOTTTTEEEESSSS ZMODEM's support of XOFF/XON flow control allows proper operation in many environments that do not support XMODEM uploads. Unfortunately, not all Unix versions support input flow control. The TTY input buffering on some systems may not adequately buffer long blocks or streaming input at high speed. You should suspect this problem when you can't send data to the Unix system at high speeds using ZMODEM, YMODEM-1k or XMODEM-1k, but YMODEM with 128 byte blocks works properly. The DSZ or Pro-YAM zzzzmmmmooooddddeeeemmmm llll numeric parameter may be set to a value between 64 and 1024 to limit the burst length ("zmodem pl128"). Although this compromises ZMODEM's throughput, ZMODEM's superior reliability remains intact. If a program that does not properly implement the specified file transfer protocol causes _r_z to "hang" the port after a failed transfer, either wait for _r_z to time out or keyboard a dozen Ctrl-X characters. Every reported instance of this problem has been corrected by using ZCOMM, Pro-YAM, DSZ, or other program with a correct implementation of the specified protocol. Many programs claiming to support YMODEM only support XMODEM with 1k blocks, and they often don't get that quite right. In the case of a few poorly designed microcomputers, sending serial data to a tty port at sustained high speeds has been known to cause lockups, system halts, kernel panics, and occasional antisocial behaviour. This problem is not unique to _r_z; newer versions of Kermit, CRT terminals with screen transmission, and line noise have the same effect. When experimenting with high speed input to a system, consider rebooting the system if the file transfers are not successful, especially if the personality of the system appears altered. The Unix "ulimit" parameter must be set high enough to permit large file transfers to Unix. Telebit modems must not be set to "spoof" UUCP, XMODEM, YMODEM, or KERMIT. Setting one of these spoofing modes interferes with other protocols. Telebit's YMODEM spoofing interferes with YMODEM transfers. Page 6 (printed 8/2/96) RRRRZZZZ((((1111)))) OOOOmmmmeeeennnn TTTTeeeecccchhhhnnnnoooollllooooggggyyyy IIIINNNNCCCC ((((OOOOMMMMEEEENNNN)))) RRRRZZZZ((((1111)))) 32 bit CRC code courtesy Gary S. Brown. Directory creation code from John Gilmore's PD TAR program. NNNNEEEETTTTWWWWOOOORRRRKKKK NNNNOOOOTTTTEEEESSSS Escaping all control characters (sz -e) may help if the transfer gets stuck in the same place on every attempt. Professional-YAM and ZCOMM allow selection of which control characters need to be escaped. In extreme cases 7-bit transmission may be required (see Professional-YAM/ZCOMM manual). 7-bit transmission requires rz version 4.50 or higher. Please refer to the sz -T command in sz.doc for more help. BBBBUUUUGGGGSSSS This version of _r_z does not support some ZMODEM features. Unix flavors of Professional-YAM may be linked to "rz" to support these features. The ASCII option's CR/LF to NL translation merely deletes CR's; undos(omen) performs a more intelligent translation. ZZZZMMMMOOOODDDDEEEEMMMM CCCCAAAAPPPPAAAABBBBIIIILLLLIIIITTTTIIIIEEEESSSS _R_z supports ZMODEM command execution (zcommand), incoming ZMODEM binary (-b), ASCII (-a), escape controls (-e), newer(-n), newer+longer(-N), protect (-p), Crash Recovery(- r), clobber (-y), match+clobber (-Y), compression(-Z), and append (-+) requests. Other options sent by the sender are ignored. The default is protect (-p) and binary (-b). Unix Professional-YAM provides higher performance and other features not supported by _r_z. Please contact Omen Technology Inc for product information. Omen Technology INC Post Office Box 4681 Portland OR 97208 503-614-0430 (Sales) 900-555-RTFM (Unregistered user Technical Support) FFFFIIIILLLLEEEESSSS rz.c, crctab.c, rbsb.c, zm.c, zmr.c, zmodem.h, rz.1 /tmp/rzlog stores debugging output generated with -vv option Page 7 (printed 8/2/96)