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1991-01-05
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From: wht@n4hgf (Warren Tucker)
Newsgroups: comp.sources.misc
Subject: v16i023: ECU async comm package rev 3.0 manual, Part02/03
Message-ID: <1991Jan5.062356.3920@sparky.IMD.Sterling.COM>
Date: 5 Jan 91 06:23:56 GMT
Approved: kent@sparky.imd.sterling.com
X-Checksum-Snefru: dbd43e1b 8d1eeb1a 18ff3f10 57e213dd
Submitted-by: Warren Tucker <wht@n4hgf>
Posting-number: Volume 16, Issue 23
Archive-name: ecuman3/part02
---- Cut Here and feed the following to sh ----
#!/bin/sh
# this is ecuman3.02 (part 2 of ecuman3)
# do not concatenate these parts, unpack them in order with /bin/sh
# file doc/ecu.man continued
#
if touch 2>&1 | fgrep 'amc' > /dev/null
then TOUCH=touch
else TOUCH=true
fi
if test ! -r _shar_seq_.tmp; then
echo 'Please unpack part 1 first!'
exit 1
fi
(read Scheck
if test "$Scheck" != 2; then
echo Please unpack part "$Scheck" next!
exit 1
else
exit 0
fi
) < _shar_seq_.tmp || exit 1
echo 'x - continuing file doc/ecu.man'
sed 's/^X//' << 'SHAR_EOF' >> 'doc/ecu.man' &&
X cycle to the next entry or abort the cycle.
X
X If no entries are marked for redial, the current, highlighted directory
X entry is used for dialing.
X
X To unmark a single entry, press 'M' (uppercase M). To unmark all
X entries, press 'U'.
X
X
X 4.7.3 Automatic Login Procedure
X
X Upon dialing from the menu, if a procedure file can be found in the
X current directory or the users home .ECU subdirectory whose name matches
X the logical name, then the procedure is executed with the argument
X '!MENU'. It is the responsibility of the automatically executed
X procedure to establish connection with the remote system (by using the
X procedure dial command). An example of an automatic login procedure can
X be found in the distribution subdirectory 'models' named 'sysname.ep'.
X A companion procedure is 'unixlogin.ep'.
X
X For example,
X
X | entry name | telephone number | tty | baud P | ...
X | sysname | 555-1234 | Any | 2400 N | ...
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 30
X
X
X
X #-----------------------------------------------------------
X # sysname.ep - procedure to call UNIX-like system 'sysname'
X #
X # CONFIDENTIAL - This function should be chmod 0600 because
X # it contains a password which you probably don't want to be
X # common knowledge.
X #
X # This procedure calls 'unixlogin.ep' to do the hard work.
X #-----------------------------------------------------------
X
X mkvar $s_pwd(20) # local variable preserves password
X $s_pwd = 'password' # security by disappearing when the
X # procedure terminates
X
X # also, by keeping the password text off the following line,
X # the password will not be displayed if you abort (interrupt)
X # the procedure
X
X do 'unixlogin' %argv(0) 'username' $s_pwd 'ansi-or-whatever'
X
X
X
X 4.8 DO : perform procedure
X
X usage: do <procname> [<arg> ... ]
X
X
X Perform ECU procedure. Ecu searches for <procname>.ep in the current
X directory. If the file is not found, the program looks for the file in
X the ~/.ECU directory. One or more arguments may be passed to the
X procedure. Arguments aare made available in the called procedure by use
X of the %argc integer function and %argv string function.
X
X Unlike arguments to the do procedure command, arguments to the do
X interactive command are not quoted and may not contain embedded spaces
X or tabs.
X
X
X
X 4.9 DUplex : set/display duplex
X
X usage: duplex [ Full | Half ]
X
X
X This command specifies whether or not ECU is to locally echo characters
X typed by you at the keyboard. The overwhelming majority of remote
X systems provide the echo function, in which case full duplex must be
X used. For the rare occasions when the remote system does not echo your
X keyboard input, setting half duplex will allow you to see what you are
X typing.
X
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 31
X
X
X
X When communicating with another terminal in a "teletype conversation",
X setting half duplex is generally required. In such cases, use of the
X nl, nlin and nlout commands may also be required.
X
X The default setting for duplex is full.
X
X
X
X 4.10 EXit : drop carrier, exit program
X
X usage: exit
X
X
X This command terminates ECU promptly. If your modem does not drop
X carrier upon loss of Data Terminal Ready (DTR), the command will
X terminate ECU, but may leave the communications line off hook. It is
X strongly recommended that you configure your modem to hang up the phone
X line when DTR drops. A shorthand version of this command exists: '.' is
X equivalent to exit.
X
X
X
X 4.11 FI : send text file to line
X
X usage: fi [<filename>]
X
X
X "file insert": This command causes file characters to be inserted into
X the transmit data stream as though they had been entered at the
X keyboard. No error correction is provided, although XON/XOFF flow
X control is obeyed.
X
X If <filename> is not entered on the command line, a prompt for the
X filename is made. Once the filename has been entered and file has been
X opened, you are asked whether the file should be transmitted at full
X speed, by "echo pacing" or by a single line at a time. You may also
X append an 'f', 'e' or 's' argument to the command line.
X
X If your remote can tolerate it, full speed transmission is the fastest.
X Some systems are not capable of receiving large amount of data
X ("streaming data") without pauses. Even with "full" speed transmission,
X some "pacing" (inter-character delay) is introduced to ease loading on
X the remote system. Pressing the interrupt key (DEL) stops a full speed
X transmission.
X
X By specifying echo pacing, it is possible to increase the likelihood of
X proper receipt. Echo pacing reads the return data stream to attempt to
X keep from overloading the remote. Pressing the interrupt key (DEL)
X stops an echo paced transmission.
X
X As a last resort, if echo pacing is not working for you, (i.e., you are
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 32
X
X
X
X using the command in an environment where the remote does not echo your
X characters), single line at a time transmission is available. With
X "single" line transmission, you must press the space key to initiate
X sending each line. Pressing the 'ESC' or 's' key stops the transfer.
X
X
X 4.12 FKey : function key definition
X
X usage: fkey [<keyset_name>]
X
X
X This command allows the mapping of function keys F1-F12, PgUp, PgDn, End
X and Ins and the cursor up, down, left and right keys to emit a desired
X sequence of characters when a function key is pressed. <keyset_name>
X specifies which key set in ~/.ecu/keys is to be selected. Sample entry:
X
X hayes
X F1:escape:+ + +
X F2:autoans:A T S 0 = 1 cr
X F3:dial:A T D T
X bbs
X F1:cancel:^K
X F2:yes:y cr
X
X
X If a keyset_name matches a logical dial directory name, it is loaded
X when the number is dialed.
X
X The characters in the mapped string may be any printable character or
X one of the following:
X
X map -> character map -> character
X --- ----------- --- ------------
X nul 0 000 00 ^@ | dle 16 020 10 ^P
X soh 1 001 01 ^A | dc1 17 021 11 ^Q
X stx 2 002 02 ^B | dc2 18 022 12 ^R
X etx 3 003 03 ^C | dc3 19 023 13 ^S
X eot 4 004 04 ^D | dc4 20 024 14 ^T
X enq 5 005 05 ^E | nak 21 025 15 ^U
X ack 6 006 06 ^F | syn 22 026 16 ^V
X bel 7 007 07 ^G | etb 23 027 17 ^W
X bs 8 010 08 ^H | can 24 030 18 ^X
X ht 9 011 09 ^I | em 25 031 19 ^Y
X nl 10 012 0a ^J | sub 26 032 1a ^Z
X vt 11 013 0b ^K | esc 27 033 1b ^[
X ff 12 014 0c ^L | fs 28 034 1c ^(
X cr 13 015 0d ^M | gs 29 035 1d ^]
X so 14 016 0e ^N | rs 30 036 1e ^^
X si 15 017 0f ^O | us 31 037 1f ^_
X
X
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 33
X
X
X
X 4.13 HAngup : hang up modem
X
X usage: hangup
X
X
X This causes DTR to be momentarily interrupted, terminating any
X outstanding connection. Your DCE (modem) must be able to drop carrier
X upon loss of DTR.
X
X
X 4.14 HElp : invoke help
X
X usage: help [<cmd-name>]
X
X
X Issuing this command with no argument displays a list of commands
X followed by a request for a command for further information.
X
X
X 4.15 LLp : set session log to /dev/lp
X
X usage: llp
X
X
X This command is a shorthand version of 'log /dev/lp'. /dev/lp must not
X be under the control of a print spooler.
X
X
X 4.16 LOFf : turn off session logging
X
X usage: loff
X
X
X This command is shorthand for 'log off'. If session logging is active,
X it is turned off.
X
X
X 4.17 LOG : session logging control
X
X usage: log [-s] [-r] [ | off | filename ]
X -s "scratch" previous file contents; otherwise append
X -r "raw" logging; otherwise non-printable characters
X other than tab and newline are omitted from the log
X
X
X This command controls session logging; issuing the command with no
X argument causes the status of session logging to be displayed. The
X special argument 'off' causes active logging to be terminated. Other
X argument values cause logging to start using the argument as a filename.
X Issuing a log command with a filename when logging is already active
X causes the previous file to be closed and the new file to be opened.
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 34
X
X
X
X Switches are meaningful only when used in conjunction with a filename to
X start logging.
X
X
X
X 4.18 NL : display CR/LF mapping
X
X usage: nl
X
X
X Display the current setting of CR/LF mapping. For more information,
X refer to the nlin and nlout command descriptions.
X
X
X
X 4.19 NLIn : set receive CR/LF mapping
X
X usage: nlin [<y-n>]
X
X
X This command controls whether or not a newline (NL/LF) character is sent
X to the screen upon receipt of a carriage return (CR) from the remote
X system. Most remote computers supply a NL after CR. When communicating
X with another terminal in a "teletype conversation", this is generally
X not the case (see also the duplex command).
X
X Issuing the command without <y-n> causes the current setting to be
X displayed. The format of <y-n> is flexible: 'y' or '1' enables
X appending NL to CR, 'n' or '0' causes the feature to be disabled.
X
X
X
X 4.20 NLOut : set transmit CR/LF mapping
X
X usage: nlout [<y-n>]
X
X
X This command controls whether or not a newline (NL/LF) character is sent
X to the remote system upon transmission of a carriage return (CR) entered
X by the keyboard. Most remote computers do not require (indeed
X "dislike") a NL after CR. When communicating with another terminal in a
X "teletype conversation", this is generally not the case (see also the
X duplex command).
X
X Issuing the command without <y-n> causes the current setting to be
X displayed. The format of <y-n> is flexible: 'y' or '1' enables
X appending NL to CR, 'n' or '0' causes the feature to be disabled.
X
X
X
X
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 35
X
X
X
X 4.21 OA : octal to ascii char
X
X usage: oa [<octal-val>]
X
X
X <octal-val> is a octal value between 0 and 0377; the parity (sign) bit
X is stripped and the equivalent ASCII character value is displayed.
X
X If no argument is supplied, a table of control characters is printed
X containing decimal, octal, hex, ASCII identifiers and two-character
X control character identifier.
X
X
X
X 4.22 PARity : set/display line parity
X
X usage: parity [ None | Even | Odd ]
X
X
X This command controls the parity of characters transmitted by the
X keyboard. Issuing the command with no argument displays the current
X setting. When the argument is supplied, only the first character is
X required. Even or odd parity implies seven data bits; no parity implies
X eight data bits. Parity of incoming characters is not checked.
X
X The setting may be automatically changed as the result of an interactive
X or procedure dial command. See the baud and dial command descriptions.
X
X
X
X 4.23 PId : display process ids
X
X usage: pid
X
X
X This command displays the process id of the ECU transmitter process, the
X ECU receiver process and the process ids of ECU's parent and group.
X
X
X 4.24 PLog : procedure logging
X
X usage: plog [ <filename> | off]
X
X
X This command enables or disbles procedure logging.
X
X
X
X
X
X
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 36
X
X
X
X 4.25 PTrace : control procedure trace
X
X usage: ptrace [ 0 | 1 | on | off]
X
X
X This command controls whether or not procedure execution is to be
X traced. Trace output is written to the screen and varys in its nature
X depending upon the command being traced. Specifically, any change to a
X string or integer variable is noted. If tracing is enabled, the output
X will also be written to the procedure log file (see the interactive and
X procedure commands). Issuing the command with no argument shows current
X status.
X
X
X 4.26 PWd : print working directory
X
X usage: pwd
X
X
X This command prints the current working directory of the ECU process.
X
X
X
X 4.27 REDial : redial last number
X
X usage: redial [<retry-count> [<pause-interval>]]
X
X
X This command redials a number previously dialed with the 'dial' command.
X Modem status is tested and multiple retries may be made. <retry-count>
X specifies how many retries are to be made. <pause-interval> specifies
X how many seconds the program pauses after a failure to connect. You
X must specify <retry-count> in order to specify <pause-interval>. The
X default value for <retry-count> is 10, for <pause-interval> is 60.
X
X You should know that in some jurisdictions, it is ILLEGAL to dial the
X same telephone number more than a specified number of times during some
X interval of time. In any case, a <pause-interval> less than 15 seconds
X is silently changed to 15 seconds.
X
X
X 4.28 REV : ECU revision/make date
X
X usage: rev
X
X
X This command displays ECU's revision, the transmitter process id' and
X the date and time ECU was made.
X
X
X
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 37
X
X
X
X 4.29 RK : receive via C-Kermit
X
X usage: rk
X
X
X This command searches the PATH list for 'ckermit' (Columbia University
X C-Kermit) and invokes it to receive files.
X
X The file ~/.kermrc must be set up to have any desired initialization
X paraeters you desire. Refer to C-Kermit documentation for more
X information.
X
X
X
X 4.30 RS : receive via SEAlink
X
X usage: rs
X
X
X This command invokes a SEAlink receive protocol.
X
X
X 4.31 RTScts : control RTS/CTS flow control
X
X usage: rtscts [ off| on | no | yes | 0 | 1 | 2 | 3 ]
X
X
X This command controls the RTS/CTS flow control feature of the SCO
X UNIX/XENIX line driver (which may or may not work). If no argument is
X supplied, the current setting is displayed. Specifying 0 or n disables
X the facility; 1 or y causes RTS/CTS flow control to be enabled.
X
X What the command does is to manipulate the RTSFLOW and CTSFLOW bits of
X the termio c_cflag word (see termio(S)).
X
X
X argument | RTSFLOW | CTSFLOW
X ---------+---------+---------
X off | 0 | 0
X on | 1 | 1
X no | 0 | 0
X yes | 1 | 1
X 0 | 0 | 0
X 1 | 1 | 1
X 2 | 1 | 0
X 3 | 0 | 1
X
X
X
X
X
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 38
X
X
X
X 4.32 RX : receive via XMODEM/CRC
X
X usage: rx
X
X
X This command invokes ecurz to receive files from the remote system using
X XMODEM/CRC.
X
X After entering the command, you are prompted as to whether or not file
X CR/LF characters are to be converted to newlines. If you are
X transferring text files from a system which contain CR/LF line
X terminators, you must answer yes to this question. You should answer no
X when transferring binary files, such as executables, .arc files and the
X like. File transfer progress is presented on a visual display. To
X abort the transfer, press your interrupt key (usually DEL unless reset
X with stty(C)).
X
X
X
X 4.33 RY : receive via YMODEM Batch
X
X usage: ry
X
X
X This command invokes ecurz to receive files from the remote system using
X YMODEM batch with CRC-16 error correction. The YMODEM is "true YMODEM",
X not XMODEM-1k. File transfer progress is presented on a visual display.
X To abort the transfer, press your interrupt key (usually DEL unless
X reset with stty(C)).
X
X
X
X 4.34 RZ : receive via ZMODEM/CRC32
X
X usage: rz
X
X
X This command invokes ecurz to receive files from the remote system using
X ZMODEM/CRC32. File transfer progress is presented on a visual display.
X To abort the transfer, press your interrupt key (usually DEL unless
X reset with stty(C)).
X
X
X
X 4.35 SDNAME : select screen dump file name
X
X usage: sdname [<filename>]
X
X
X When the "cursor 5" key is pressed, the screen contents are dumped to a
X file. By default, this file is named '~/.ecu/screen.dump'. This
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 39
X
X
X
X command either displays or changes the current screen dump file name,
X depending upon whether or not a argument is supplied.
X
X The actions of this command have no effect on the operation of the
X procedure command.
X
X See the section titled "Screen Dump" for more information.
X
X
X 4.36 SK : send via C-Kermit
X
X usage: sk [<file-list>]
X
X
X This command searches the PATH list for 'ckermit' (Columbia University
X C-Kermit) and invokes it to send files. The file ~/.kermrc must be set
X up to have any desired initialization paraeters you desire.
X
X After entering the command, you are prompted as to whether or not file
X newline characters are to be converted to CR/LF. If you are
X transferring text files to a system which requires CR/LF line
X terminators, you must answer yes to this question. You should answer no
X when transferring binary files, such as executables, .arc files and the
X like. You are prompted to enter a list of files to send, which may
X contain one or more wildcard specifications.
X
X The file ~/.kermrc must be set up to have any desired initialization
X arguments you desire. Refer to C-Kermit documentation for more
X information.
X
X
X
X 4.37 SS : send via SEAlink
X
X usage: ss [<file-list>]
X
X
X This command invokes a SEAlink file transmission protocol.
X
X
X .--[ Send SEAlink ]-------- dir: /u1/src/ecu ------------------.
X | |
X | File(s) to send: |
X | ___________________________________________________________ |
X | |
X | TAB:next ^B:prev END:perform transfer ESC:abort |
X `-- enter file(s) to send -------------------------------------'
X
X
X
X
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 40
X
X
X
X 4.38 STat : connection status
X
X usage: stat
X
X
X This command displays statistics about ECU usage. Example display:
X
X Date/time: 06-14-1988 11:40:35 (UTC 15:40)
X Total chars transmitted: 178
X Total chars received: 3681
X
X Date/time: 06-14-1988 14:41:24 (UTC 18:41)
X Connected to CompuHost (555-1234) at 14:40:57
X Parameters: 2400-N-1 Connect time: 00:01:27
X Total chars transmitted: 234 (since CONNECT 142)
X Total chars received: 2278 (since CONNECT 1478)
X
X
X
X 4.39 SX : send via XMODEM/CRC
X
X usage: sx [<file-name>]
X
X
X This command invokes ecusz to send a file to the remote system using
X XMODEM/CRC.
X
X After entering the command, you are prompted as to whether or not file
X CR/LF characters are to be converted to newlines. If you are
X transferring text files from a system which contain CR/LF line
X terminators, you must answer yes to this question. You should answer no
X when transferring binary files, such as executables, .arc files and the
X like.
X
X You are prompted to enter a filename to send. File transfer progress is
X presented on a visual display. To abort the transfer, press your
X interrupt key (usually DEL unless reset with stty(C)).
X
X .--[ Send XMODEM/CRC ]----- dir: /u1/src/ecu -----------.
X | |
X | File to send: |
X | ____________________________________________________ |
X | |
X | Binary: Y (no NL-CR/LF translation) |
X | |
X | TAB:next ^B:prev END:perform transfer ESC:abort |
X `-- enter file(s) to send ------------------------------'
X
X
X
X
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 41
X
X
X
X 4.40 SY : send via YMODEM Batch
X
X usage: sy [<file-list>]
X
X
X This command invokes ecusz to send file(s) to the remote system using
X YMODEM/CRC.
X
X You are prompted to enter filename(s) to send, which may consist of one
X or more wildcard specifications. File transfer progress is presented on
X a visual display. To abort the transfer, press your interrupt key
X (usually DEL unless reset with stty(C)).
X
X .--[ Send YMODEM/CRC ]----- dir: /u1/src/ecu -----------.
X | |
X | File to send: |
X | ____________________________________________________ |
X | |
X | Binary: Y (no NL-CR/LF translation) |
X | |
X | TAB:next ^B:prev END:perform transfer ESC:abort |
X `-- enter file(s) to send ------------------------------'
X
X
X
X 4.41 SZ : send via ZMODEM/CRC32
X
X usage: sz [<file-list>]
X
X
X This command invokes ecusz to send file(s) to the remote system using
X ZMODEM/CRC32.
X
X You are prompted to enter filename(s) to send, which may consist of one
X or more wildcard specifications. File transfer progress is presented on
X a visual display. To abort the transfer, press your interrupt key
X (usually DEL unless reset with stty(C)).
X
X Note: if you specify sending only newer files and the remote receiver
X does not support the feature, it may skip (reject) all your files.
X Retry the transfer specifying 'N' to 'Transfer only newer files'.
X
X
X
X
X
X
X
X
X
X
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 42
X
X
X
X | |
X | File(s) to send: |
X | ckermit-5a-130 |
X | |
X | Binary: Y (no NL-CR/LF translation) |
X | Overwrite destination files: Y |
X | Send full pathames: N |
X | Transfer only newer files: N |
X | |
X | TAB:next ^B:prev END:perform transfer ESC:abort |
X `-- enter file(s) to send ---------------------------------------'
X `-- Y: no conversion, N: NLs converted to CR/LF -----------------'
X `-- Y: overwrite, N: protect destination files ------------------'
X `-- Y: full pathnames, N: strip directory portion from names ----'
X `-- Y: send only if source newer than destination, N send all ---'
X
X
X
X 4.42 TIme : time of day
X
X usage: time
X
X
X This command displays the local date and time as well as the current
X UTC.
X
X
X 4.43 TTy : console tty name
X
X usage: tty
X
X
X This command displays the current console tty name.
X
X
X
X 4.44 XA : hex to ascii char
X
X usage: xa [<hex-val>]
X
X
X <hex-val> is a hexadecimal value between 0 and FF; the parity (sign) bit
X is stripped and the equivalent ASCII character value is displayed.
X
X If no argument is supplied, a table of control characters is printed
X containing decimal, octal, hex, ASCII identifiers and two-character
X control character identifier.
X
X
X
X
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 43
X
X
X
X 4.45 XON : xon/xoff flow control
X
X usage: xon [<arg>]
X where <arg> is on input and output flow control
X off no flow control
X in input flow control
X out output flow control
X
X
X This command enables or disables xon/xoff flow control. If the argument
X is omitted, the current flow control state is displayed.
X
X
X 4.46 ! : execute shell
X
X usage: !
X !<command>
X
X
X The '!' command is a shell escape. The environment variable SHELL is
X read to determine what shell program to execute (e.g., /bin/sh, etc).
X If '!' is entered by itself, an interactive shell is started; press ^D
X to exit back to ECU. If <command> is supplied, it is executed by the
X shell with an immediate return to ECU.
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
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X
X
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 44
X
X
X
X 5. Procedure Language
X
X
X Sample procedures are shown in the companion document 'samplproc.man'.
X
X
X
X 5.1 Arguments
X
X
X There are five types of arguments to procedure commands:
X
X Switch
X Alphabetic Token
X Integer
X String
X Relational Operators
X
X This section describes the syntax and construction of each type in turn.
X There are separate groups of valid of relational operators for integers
X and strings; thus, they are described under the appropriate sections.
X
X
X 5.1.1 Switches
X
X Switch arguments begin with a hyphen (minus, '-'). The switch argument
X must be the first argument after the command. Only one switch argument
X is allowed on the command line. If switches '-a', '-b' and '-c', are
X available and '-a' and '-b' are desired, '-ab' or '-ba' is entered.
X
X
X 5.1.2 Alphabetic Tokens
X
X Alphabetic tokens, for lack of a better term, are non-integer, non-
X quoted terms used as arguments for certain commands, such as:
X
X plog off
X
X Such argument types are fairly simple to understand and use; they are
X described here for completeness.
X
X
X 5.1.3 Integers
X
X Integer values are 32-bit quantities ranging between -2147483647 and
X 2147483647.
X
X In one case, an integer is used to store a 32-bit color mask as
X described by the color command and the %colors integer function.
X
X
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 45
X
X
X
X 5.1.3.1 Constants
X
X Integer constants are numeric strings, optionally with an initial minus
X sign, the absolue value of which must be less than 2147483648.
X
X
X 5.1.3.2 Variables
X
X There are 50 numbered, permanent integer variables referenced by the
X terms '$i0' through '$i49'. When ECU is started, the value of each
X variable is zero. Variables retain their value until changed, even
X between procedure executions. The integer variable number may be
X expressed as an expression by enclosing an integer expression in
X brackets. For instance:
X
X $i[4+5] refers to $i9
X
X $i2=5
X $i[20+$i2] refers to $i25
X
X
X Integer variables may be created for use as "local" variables or to
X promote code readability. Refer to the mkvar command.
X
X
X 5.1.3.3 Functions
X
X ECU has many built-in functions which return the value of ecu- or
X system-related information. A list of the functions appears in a later
X section.
X
X
X 5.1.3.4 Expressions
X
X In almost any place an integer argument is allowed, an expression may be
X supplied. Expressions are composed of two or more integer constants or
X variables separated by operators from the group:
X
X + addition
X - subtraction
X * multiplication
X / division
X | OR
X @ MOD
X ^ XOR
X & AND
X
X Evaluation of expressions is left-to-right. Parentheses are not
X allowed.
X
X
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 46
X
X
X
X 5.1.3.5 Relational Operators
X
X Integer relational operators are chosen from the following group:
X
X = "is equal to"
X == "is equal to"
X != "is not equal to"
X <> "is not equal to"
X > "is greater than"
X < "is greater than"
X >= "is greater than or equal to"
X <= "is less than or equal to"
X
X
X
X 5.1.4 Strings
X
X Strings are classic concatenations of zero or more eight-bit characters.
X In general, the maximum size of a string used by ECU is 256 characters.
X The absolute maximum size is 5120 characters.
X
X
X 5.1.4.1 Constants
X
X String constants are formed by placing alphanumeric characters between
X single quote characters (apostrophes). The backslash ('\') character is
X used to "escape" certains characters:
X
X '\' one backslash
X '0 newline
X '' tab
X ''' apostrophe
X
X
X
X 5.1.4.2 Variables
X
X There are 50 numbered, permanent string variables referenced by the
X terms '$s0' through '$s49', each possessing a maximum length of 256
X characters When ECU is started, the value of each variable is null (zero
X length). Variables retain their value until changed, even between
X procedure executions. The string variable number may be expressed as an
X expression by enclosing an string expression in brackets. For instance:
X
X $s[4+5] refers to $s9
X
X $s2=5
X $s[20+$s2] refers to $s25
X
X
X String variables may be created for use as "local" variables or to
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 47
X
X
X
X promote code readability. Refer to the mkvar command. Created variables
X have a life equal to the duration of the procedure which created them.
X Regardless of the declared size of a created string variable, ECU will
X automatically grow it to a maximum of 5120 characters as necessary.
X Numbered (permanent) string variables have a maximum size of 256 bytes.
X
X
X 5.1.4.3 Functions
X
X ECU has many built-in functions which return the value of ecu- or
X system-related information. A list of the functions appears in a later
X section.
X
X
X 5.1.4.4 Expressions
X
X String expressions are formed by the concatenation of string constants,
X variables and function return values using the '+' operator:
X
X Example:
X 'The quick brown fox jumped over the '+$s0'+' dog at '+%time
X
X
X
X 5.1.4.5 Relational Operators
X
X String relational operators are chosen from the following group:
X
X = "is equal to"
X == "is equal to"
X != "is not equal to"
X <> "is not equal to"
X
X
X
X
X 5.2 Commands
X
X
X
X 5.2.1 baud
X
X usage: baud <baud-int>
X
X This command sets the baud rate for the attached line. The integer
X argument <baud-int> must be one of 110, 300, 600, 1200, 2400, 4800,
X 9600, 19200 and 38400.
X
X
X
X
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 48
X
X
X
X Example:
X baud 9600
X set $i0=2400; baud $i0
X
X
X
X 5.2.2 break
X
X usage: break
X
X This command is used inside a whilei or whiles compound statement to
X exit the loop.
X
X Example:
X
X whilei 1=1 #forever unless break command executed
X {
X echo -n 'Answer yes or no: '
X set $s0=%cgets # get answer
X ifi %instr($s0,'y') == 0 set $i0 = 1; break
X ifi %instr($s0,'n') == 0 set $i0 = 0; break
X # got neither 'y' nor 'n' ... keep trying
X }
X # now $i0 = 1 if yes, 0 if no
X
X
X NOTE: further examples of break usage may be found in the example for
X the else command.
X
X
X 5.2.3 cd
X
X usage: cd <directory-path>
X
X This command changes ECU's current working directory. The string
X argument <directory-path> may contain any directory pathname
X specification legal to be submitted to the shell csh. Wild card
X characters may be used, provided the expansion produces only one
X pathname.
X
X
X Example:
X
X cd '~user/bin'
X cd %envvar('HOME')+'/bin'
X
X
X
X 5.2.4 clrx
X
X usage: clrx
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 49
X
X
X
X This command clears the attached line's transmitter XOFF state.
X Issuing the command is the equivalent to receiving an XON from the
X remote system.
X
X
X 5.2.5 cls
X
X usage: cls
X
X This command clears the screen.
X
X
X 5.2.6 color
X
X
X usage: color <normal-foreground> [<normal-background>]
X usage: color -r <reverse-foreground> [<reverse-background>]
X
X
X This command changes the current normal or reverse video colors in a
X manner similar to the setcolor(C) command. It has no effect on systems
X using a monochrome monitor. If the second (background) color is
X omitted, it is assumed to be black.
X
X The command also forces normal video mode. Refer to the vidnorm and
X vidrev commands. Refer also to the vidcolor command.
X
X
X Color names
X blue magenta brown black
X lt_blue lt_magenta yellow gray
X cyan white green red
X lt_cyan hi_white lt_green lt_red
X
X Example:
X
X color lt_green # normal video light green on black
X color -r red white # reverse video red on white
X
X
X
X 5.2.7 continue
X
X usage: continue
X
X This command is used inside a whilei or whiles compound statement to
X skip the remainder of any commands in the loop and continue execution at
X the first command in the loop.
X
X
X
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 50
X
X
X
X Example:
X
X send '' # send ENTER to get prompt
X whilei 1=1 # forever unless break command executed
X {
X lookfor -e 'login: ' # look for login prompt
X ifi $i0 == 0 # if we dont get prompt ...
X {
X send '' # send ENTER again
X continue # and look for login prompt
X }
X send $s_name # send username
X lookfor -e 'Password:'
X send $s_password
X get -e 0 50 # wait 10 seconds for response
X
X # if incorrect not found in response, ...
X if %instr($s0,'incorrect') < 0 # ... must have won
X break
X
X # garbled line?: system will send another 'login: '
X }
X
X
X
X NOTE: further examples of continue usage may be found in the example for
X the else command.
X
X
X 5.2.8 cursor
X
X usage: cursor <row> [<col>]
X
X This command places the cursor at a specified position on the video
X screen. The top left of the scrren is row 0, column 0. If <col> is not
X specified, it is assumed 0 (left margin).
X
X Example:
X
X cls
X $i0 = 5
X whilei $i5 < 12
X {
X cursor $i5
X echo 'This is line '+%itos($i5,2d)+' of the display'
X }
X
X
X
X
X
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 51
X
X
X
X 5.2.9 delline
X
X usage: delline
X
X This command deletes the current line from the video display.
X
X
X 5.2.10 dial
X
X usage: dial <remote>
X
X This command causes an outgoing call to be placed. The string argument
X <remote> can take one of two forms: a numeric telephone number or an
X alphanumeric "logical" number or system name.
X
X A numeric phone number ('1(800)555-1212' or '2345678') must begin with a
X digit and must consist entirely of digits, parentheses or hyphens. If a
X telephone number is supplied, the phone number is dialed; you must first
X have set the desired baud rate and parity using the 'baud' and 'parity'
X commands.
X
X If a logical name is entered, the phone directory (managed by the
X interactive dial command) is searched; if the entry is found, the baud
X rate and parity is automatically set from values in the directory entry;
X then, the number in the directory entry is dialed.
X
X See the section on the interactive "Dial" command and the section titled
X "Choosing a Dialout Line" for more information.
X
X When the dial command returns, integer variable $i0 is set to a status
X code and string variable $s0 has a text message (the modem verbal result
X code if the ECU dialer is used, a representation of the return status
X code if a uucp dialer is used [see below]).
X
X Dial Command $i0 Status Codes
X
X 0 successful connect
X 1 failed to connect (call progress)
X 2 dial interrupted by signal
X 3 modem error (non responsive or commands rejected)
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
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X
X
X ECU Technical Description 52
X
X
X
X Dial Command $s0 Status Messages (uucp dialer)
X
X CONNECT #### #### = baud rate
X BUSY only some modems
X NO ANSWER only some modems
X NO CARRIER most generic "fail to connect"
X NO DIAL TONE only some modems
X !Connect bad baud rate modem reported different rate
X !Interrupted call interrupted by signal
X !Invalid arguments ECU error
X !Invalid phone number too long or bad characters
X !Ioctl error should not be reported here
X !Line in use should not be reported here
X !Line open error should not be reported here
X !Modem Error modem did not respond
X
X Note: if the ECU dialer is used, the actual modem result code
X is returned in $s0 or one of the following two strings:
X
X !Interrupted call interrupted by signal
X !Modem Error modem did not respond
X
X
X
X 5.2.11 do
X
X usage: do <procname> [<arg> ...]
X
X This command executes a procedure whose name appears as the command's
X first (string) argument. One or more arguments (up to 19) may be passed
X to the called procedure; an argument may consist of any valid string
X expression, provided, that, when expanded, the argument does not exceed
X 256 characters in length.
X
X The called procedure may read its arguments using the %argv string
X function. %argv(0) is the name of the procedure. The quantity of
X arguments may be obtained using the %argc integer function.
X
X
X Example:
X
X do 'proc' %rname %date+' '+%time %argv(0)
X
X Note: in this example, the called procedure is passed the name
X of the calling procedure as the last argument.
X
X
X
X 5.2.12 duplex
X
X
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 53
X
X
X
X usage: duplex full | half
X duplex 'full' | 'half'
X
X
X This command specifies whether or not ECU is to locally echo characters
X typed by you at the keyboard. The overwhelming majority of remote
X systems provide the echo function, in which case full duplex must be
X used. For the rare occasions when the remote system does not echo your
X keyboard input, setting half duplex will allow you to see what you are
X typing.
X
X When communicating with another terminal in a "teletype conversation",
X setting half duplex is generally required. In such cases, use of the
X interactive nl, nlin and nlout commands may also be required.
X
X Example:
X
X duplex full
X $s0 = 'full'; duplex $s0
X
X
X
X
X 5.2.13 echo
X
X usage: echo [-n] <string>
X
X This command prints the contents of the string argument <string> on the
X screen. If the -n switch is not present, a newline follows the output
X of <string>.
X
X Example:
X
X echo 'Procedure '+%argv(0)+' executing at '+%time
X echo -n 'Enter your first name: '; $s0 = %cgets
X
X
X
X 5.2.14 eeol
X
X usage: eeol
X
X This command erases the video display to the end of the line.
X
X
X 5.2.15 else
X
X
X This statement may follow an ifi or ifs command to specify one or more
X statements to be executed if the if-type command condition is false.
X Else commands may be chained together in the traditional structured
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 54
X
X
X
X usage: else <statement>
X
X else
X <statement>
X
X else
X {
X any kind and number of statements
X }
X
X else <if> <statement>
X
X else <if>
X {
X any kind and number of statements
X }
X
X
X language manner.
X
X For the purposes of describing this command, <statement> is any single
X or compound statement NOT containing a whilei or whiles command. If you
X wish to have a while-type command executed as part of an else condition,
X the while must occur within braces ("{}").
X
X <if> is an ifi or ifs command followed by an <if-condition> (see the
X description of the ifi or ifs commands below).
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
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X
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X
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X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 55
X
X
X
X Example:
X
X #+------------------------------------------------------
X # finger.ep - procedure to send 'finger' to remote
X # BSD Unix system; print resulting lines in different
X # colors: uucp logins green, root red, others cyan
X #-------------------------------------------------------
X
X mkvar $icolor; $icolor = %colors
X mkvar $itimeout
X $itimeout = 50 # timeout for first line 5 secs
X send 'ps -aux' # send command, but do not echo
X lookfor '0 40 # swallow command
X whilei 1==1 # forever, or until break
X {
X lgets 0 $itimeout 1 '0 #get a line
X ifi $i0 = 0 break #if no chaacters read
X $itimeout = 10 #wait 1 sec for later lines
X
X ifi %instr($s0,'% ') >= 0 # if csh prompt seen
X break # exit while loop
X else ifi %instr($s0,'Login') >= 0
X color gray
X else ifi %instr($s0,'root') >= 0
X color red
X else ifi %instr($s0,'uucp') >= 0
X color green
X else color cyan
X echo $s0
X }
X icolor $icolor #restore entry colors
X send '' #force a new prompt from remote
X
X
X
X
X 5.2.16 exit
X
X usage: exit [<status>]
X
X This command causes an abrupt termination of the ECU program. Any
X existing connection with a remote system is terminated immediately. If
X no integer argument <status> is found, ECU exits with a program exit
X status of 0. If <status> is found and the value is zero, then ECU exits
X with a program exit status of 0. If <status> non-zero,its value must be
X in the range of 1 to 31, and ECU exits with a program exit status of 192
X plus <status>. This feature allows batch executions of ECU by shell
X script detect user-determined ECU execution status. See the section
X titled "Exit Codes".
X
X
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 56
X
X
X
X 5.2.17 expresp
X
X usage: expresp [-v[v...]] <exp-resp-str> [<timeout_msecs>]
X
X This command emulates the uuchat function as described in the SCO HDB
X UUCP documentation and in the /usr/lib/uucp/Dialers file.
X
X -v causes the expect-respond conversation between ECU and the remote
X system to be displayed on the screen. This switch is automatically
X enabled if procdedure tracing is enabled.
X
X multiple v's (e.g., -vv, -vvv) up to 3 'v's produce more verbose debug
X output. -vv causes each base level expect and respond string to be
X displayed. -vvv causes a hexadecimal dump of each interpreted expect
X string to be displayed.
X
X <exp-resp-str> is as defined in /usr/lib/ecu/Dialers.
X
X Meaning of some of the escape characters:
X - pause (approximately 1/4-1/2 second delay)
X
X - delay (2 seconds)
X D - phone number/token
X T - phone number with Dialcodes and character translation
X N - null byte
X K - insert a BREAK
X E - turn on echo checking (for slow devices)
X \--carriagefreturnchecking
X - send new-line
X n - send octal number
X m## - delay ## milliseconds (NOT SUPPORTED BY DIALERS;
X SEE BELOW)
X ~t[##] - set timeout to ## seconds (see below)
X ~m[##] - set timeout to ## milliseconds (see below)
X Speed - Hayes-specific speed-adaptive connect handler
X
X
X <timeout_msecs> specifies an optional timeout in milliseconds for
X waiting on expect strings; it defaults to 10,000 milliseconds (10
X seconds). The resolution for timeouts is limited to the basic tick time
X of your system (HZ, 10 msec for UNIX/386, 20 msec for XENIX/386 and
X XENIX/286). The timeout for 'Speed' expects is fixed at 90 seconds.
X
X \m### causes a ### millisecond delay. Note this adds an ambiguity to
X the syntax of the send string: you may not follow an m delay with a
X literal digit to send. For example, suppose you wish to delay 300
X missileconds then send "4A". \m3004A will delay for 3004
X (approximately) milliseconds, then send an "A".
X
X Integer variable $i0 is set to one if the expect-respond script fails,
X else it is set to 0.
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 57
X
X
X
X 5.2.18 fchmod
X
X usage: fchmod <mode> <file>
X
X This command sets the mode of <file> to <mode>. The <mode> argument
X takes one of two forms, a nine-character mode string (e.g., 'rwxr-xr-x')
X or an integer value (0755). The <file> argument is either a string
X value forming a filename or an integer file number representing a file
X opened with the fopen command.
X
X The command sets $i0 = 0 if successful, else to the errno from the
X associated system call (refer to the %errstr string function and/or
X /usr/include/sys/errno.h).
X
X
X Example:
X
X fopen 1 '/tmp/123'; fchmod 'rwxrwxrwx' 1
X fchmod 'rwxrwxrwx' '/tmp/123'
X fopen 1 '/tmp/123'; fchmod 0777 1
X $i0 = 0777; fchmod $i0 '/tmp/123'
X
X All of the above example result in the same result.
X
X
X
X 5.2.19 fclose
X
X usage: fclose <file>
X
X This command closes <file>. The <file> argument is an integer file
X number representing a file opened with the fopen command.
X
X The command is ignored if <file> is not open. No integer variable is
X modified by fclose.
X
X
X Example:
X
X fclose 1
X
X
X
X 5.2.20 fdel
X
X usage: fdel <file>
X
X This command removes a file.
X
X The command sets $i0 = 0 if successful, else to the errno from the
X associated system call (refer to the %errstr string function and/or
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 58
X
X
X
X /usr/include/sys/errno.h).
X
X
X Example:
X
X fdel '/tmp/123'
X
X
X
X 5.2.21 fgetc
X
X usage: fgetc <file> <destination>
X
X This command reads a character from <file>. The <file> argument is an
X integer file number representing a file opened with the fopen command.
X
X The argument <destination> is either a string variable or an integer
X variable. If the file has reached end of file: an integer variable
X receives -1; a string variable is returned null. Otherwise, the
X character's numeric value (0-255) is placed in an integer variable or a
X string variable is returned with a length of one with the file character
X as its only character.
X
X
X Example:
X
X fgetc 1 $s0
X fgetc 1 $i_input
X
X
X
X 5.2.22 fgets
X
X usage: fgets <file> <strvar>
X
X This command reads a character from <file>. The <file> argument is an
X integer file number representing a file opened with the fopen command.
X
X The argument <strvar> is a string variable. If the file has reached end
X of file, <strvar> is returned null and integer variable $i0 is set to 1.
X Otherwise, the <strvar> receives input from the file minus the trailing
X newline and $i0 is returned zero.
X
X
X Example:
X
X fgets 1 $s0
X
X
X
X
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 59
X
X
X
X 5.2.23 fkey
X
X usage: fkey <str>
X
X This command selects a function key definition from the ~/.ecu/keys
X file.
X
X
X 5.2.24 flush
X
X usage: flush
X
X This command causes any characters received by the system from the line,
X but not yet read by the procedure to be "forgotten" or flushed.
X
X
X 5.2.25 fopen
X usage: fopen [-switches] <filenum> <filename>
X
X This command opens a file named by the string argument <filename> and
X associates it with the user-chosen file number <filenum> (which must be
X an integer value between 0 and 4, inclusive).
X
X The argument switches govern how a file is opened and must be chosen
X from this list:
X
X -r The file is opened read-only; if it does not exist, an
X error occurs.
X
X -r+ The file is opened for reading and writing; if it does
X not exist, an error occurs.
X
X -w The file is opened for writing (any previous contents of
X the file are lost); if it does not exist, it is created.
X
X -w+ The file is opened for reading and writing (any previous
X contents of the file are lost); if it does not exist, it
X is created.
X
X -a The file is opened for appending (writes to the file are
X added to the previous file contents); if it does not
X exist, it is created. All writes are appended to the
X file (the fseek command has no effect).
X
X The switches parameter may be omitted; in such cases, the file is opened
X as though '-r' had been supplied. However, if procedure tracing is
X enabled (see the description of the interactive and procedure command
X ptrace), a warning message will be issued.
X
X The command sets $i0 = 0 if successful, else to the errno from the
X associated system call (refer to the %errstr string function and/or
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 60
X
X
X
X /usr/include/sys/errno.h).
X
X Example:
X
X fopen 0 -r '/etc/passwd'
X fopen 1 -w+ '/tmp/123'
X fopen 2 -a 'tranact.log'
X
X
X
X 5.2.26 fputc
X
X usage: fputc <file> <char>
X
X This command writes character <char> into <file>. The <file> argument
X is an integer file number representing a file opened with the fopen
X command. Argument <char> is a integer value of which the lower eight
X bits are used or a string value of which the first character is used.
X
X If a write error occurs, procedure execution is terminated.
X
X Example:
X
X $s0='abc'; fputc 1 $s0 writes 'a'
X $i0=0x30 ; fputc 1 $i0 writes '0'
X
X
X
X 5.2.27 fputs
X
X usage: fputs [-n] <file> <str>
X
X This command writes the string <str> into <file>. The <file> argument
X is an integer file number representing a file opened with the fopen
X command.
X
X If the switch '-n' is omitted, a newline is appended after <str> in the
X file; if present, no newline is written.
X
X If a write error occurs, procedure execution is terminated.
X
X Example:
X
X $s0='abc'; fputc 1 $s0 writes 'a'
X
X
X
X 5.2.28 fseek
X
X usage: fseek <file> <position>
X
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 61
X
X
X
X This command sets the file position of <file> to <position. The
X corresponding integer function %ftell may be used to determine the
X current file position.
X
X Note: if <file> is open for append ('-a'), then the fseek command will
X have no effect.
X
X
X 5.2.29 getf
X
X
X usage: getf -x <int-var-spec> <offset>
X
X where: -x ==
X -b byte
X -w word (little-endian)
X -W word (big-endian)
X -l 32-bits (little-endian)
X -L 32-bits (big-endian)
X
X
X
X 5.2.30 gosub
X
X usage: gosub <label>
X
X This command transfers control of procedure to a statement other than
X the one immediately following. The <label> argument may be literal text
X or may be a string, allowing a "computed gosub" feature.
X
X When the next return statement is executed, control is returned to the
X next statement after the gosub.
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 62
X
X
X
X Example:
X
X gosub GET_NEXT
X gosub 'GET_NEXT'
X gosub 'GET'+'_NEXT'
X $s0 = 'GET_NEXT'; gosub $s0
X $s0 = 'NEXT'; gosub 'GET_'+$s0
X
X Note: all the above examples cause transfer to the label GET_NEXT.
X
X Example:
X
X #---------------------
X # gosub.ep
X #---------------------
X echo 'main'; gosub SUB; echo 'back to main'
X return
X
X SUB
X echo 'sub'
X gosub SUB2
X echo 'back to sub'
X return
X
X
X SUB2
X echo 'sub2'
X return
X
X
X
X
X 5.2.31 gosubb
X
X usage: gosubb <label>
X
X This command serves the same function as the gosub command except the
X programmer is signifying that the label is behind the current statement,
X resulting in slightly faster execution. (The label is not REQUIRED to
X be at any specific location in the procedure relative to the gosubb
X statement.)
X
X
X 5.2.32 goto
X
X usage: goto <label>
X
X This command transfers control of procedure to a statement other than
X the one immediately following. The <label> argument may be literal text
X or may be a string, allowing a "computed goto" feature.
X
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 63
X
X
X
X Example:
X
X goto GET_NEXT
X goto 'GET_NEXT'
X goto 'GET'+'_NEXT'
X $s0 = 'GET_NEXT'; goto $s0
X $s0 = 'NEXT'; goto 'GET_'+$s0
X
X Note: all the above examples cause transfer to the label GET_NEXT.
X
X
X 5.2.33 gotob
X
X usage: gotob <label>
X
X This command serves the same function as the goto command except the
X programmer is signifying that the label is behind the current statement,
X resulting in slightly faster execution. (The label is not REQUIRED to
X be at any specific location in the procedure relative to the gotob
X statement.)
X
X
X 5.2.34 hangup
X
X usage: hangup
X
X This command causes Data Terminal Ready (DTR) to be dropped momentarily,
X causing (hopefully) the termination of any current connection to a
X remote system. This command is only effective if the attached Data
X Communications Equipment is configured to terminate its connection on
X loss of DTR.
X
X If no line is attached, the command is ignored (a warning is generated
X if procedure tracing is enabled).
X
X
X 5.2.35 hexdump
X
X usage: hexdump [-s] <str>
X hexdump -t[s] <str1> <str>
X
X
X <str> buf to dump <str1> title (if -t) -s short (terse) dump
X
X This command prints a hexadecimal dump of <str> on the screen (and to
X the procedure log file, if logging enabled with the ptrace command).
X
X The switch '-t' signifies that <str1> is a title to be printed
X
X
X
X
X
X
X Public Domain by wht@n4hgf 12/26/90
X
X
X
X
X
X
X
X ECU Technical Description 64
X
X
X
X Example:
X
X $s0='The quick brown fox jumped over the lazy dog's back'
X hexdump -t 'Example hex dump' $s0
X ---------------------------- Example hex dump ----------------------------
X 0000 54 68 65 20 71 75 69 63 6B 20 62 72 6F 77 6E 20 | The quick brown |
X 0010 66 6F 78 20 6A 75 6D 70 65 64 20 6F 76 65 72 20 | fox jumped over |
X 0020 74 68 65 20 6C 61 7A 79 20 64 6F 67 27 73 20 62 | the lazy dog's b |
SHAR_EOF
true || echo 'restore of doc/ecu.man failed'
echo 'End of ecuman3 part 2'
echo 'File doc/ecu.man is continued in part 3'
echo 3 > _shar_seq_.tmp
exit 0
--------------------------------------------------------------------
Warren Tucker, TuckerWare emory!n4hgf!wht or wht@n4hgf.Mt-Park.GA.US
Hacker Extraordinaire d' async PADs, pods, proteins and protocols
exit 0 # Just in case...
--
Kent Landfield INTERNET: kent@sparky.IMD.Sterling.COM
Sterling Software, IMD UUCP: uunet!sparky!kent
Phone: (402) 291-8300 FAX: (402) 291-4362
Please send comp.sources.misc-related mail to kent@uunet.uu.net.
