CHAT(8)                     System Manager's Manual                    CHAT(8)

NAME
       chat - <?><?><?><?><?><?><?><?><?><?><?><?>

<?><?> SYNOPSIS
       chat [ options ] script

<?><?> DESCRIPTION
       chat <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?> <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?> (pppd)
       <?><?><?><?><?> pppd  <?><?> <?><?><?><?><?><?><?>

<?><?> OPTIONS
       -f <chat file>
              <?> chat <?><?><?><?> chat <?><?><?><?><?><?><?><?><?><?><?><?>
              chat <?> <?><?><?><?><?><?>(mutually
              exclusive)<?><?><?><?><?><?><?><?><?><?><?>
              <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>(multiple
              lines)<?><?><?><?> <?><?><?><?><?><?><?><?><?><?><?>(horizontal
              tab)<?><?><?><?><?><?><?><?>

       -t <timeout>
              <?><?><?><?><?><?><?><?><?><?><?>(expected
              string)<?><?><?><?><?><?><?>
              <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>
              <?><?>(reply string)<?>
              <?><?><?><?><?><?><?><?>(alternate)<?><?><?>
              <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>
              <?><?><?><?><?><?><?><?> chat
              <?><?><?><?><?><?><?><?><?><?><?><?><?><?>

       -r <report file>
              Set the file for output of the report strings. If you use the
              keyword REPORT, the resulting strings are written to this file.
              If this option is not used and you still use REPORT keywords,
              the stderr file is used for the report strings.

       -e     Start with the echo option turned on. Echoing may also be turned
              on or off at specific points in the chat script by using the
              ECHO keyword. When echoing is enabled, all output from the modem
              is echoed to stderr.

       -E     Enables environment variable substituion within chat scripts
              using the standard $xxx syntax.

       -v     <?><?> chat <?><?><?><?><?><?>(verbose)<?><?><?><?><?> <?><?>
              chat <?>
              <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>
              SYSLOG <?><?>The default is to log through the SYSLOG; the
              logging method may be altered with the -S and -s flags.

       -V     Request that the chat script be executed in a stderr verbose
              mode. The chat program will then log all text received from the
              modem and the output strings sent to the modem to the stderr
              device. This device is usually the local console at the station
              running the chat or pppd program.

       -s     Use stderr.  All log messages from '-v' and all error messages
              will be sent to stderr.

       -S     Do not use the SYSLOG.  By default, error messages are sent to
              the SYSLOG.  The use of -S will prevent both log messages from
              '-v' and error messages from being sent to the SYSLOG.

       -T <phone number>
              Pass in an arbitary string, usually a phone number, that will be
              substituted for the \T substitution metacharacter in a send
              string.

       -U <phone number 2>
              Pass in a second string, usually a phone number, that will be
              substituted for the \U substitution metacharacter in a send
              string.  This is useful when dialing an ISDN terminal adapter
              that requires two numbers.

       script script <?><?><?><?><?><?><?><?> -f
              <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>
              <?><?><?><?><?><?><?> chat <?><?><?><?>

CHAT <?><?> SCRIPT
       chat <?><?><?><?><?><?><?><?>

       <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>(expect-
       send)<?><?><?><?> <?><?>(pairs of
       string)<?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?>(subexpect-
       subsend)<?><?><?><?><?><?><?><?><?>(dash)<?><?><?><?>
       <?><?><?><?><?><?><?>

              ogin:-BREAK-ogin: ppp ssword: hello2u2

       <?><?><?><?><?> chat <?><?><?><?><?><?> "ogin:"
       <?><?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?><?>(break sequence)<?><?><?><?><?><?><?>
       "ogin:" <?><?><?><?><?> <?><?><?><?><?> "ogin:"
       <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>

       <?><?><?><?><?><?><?><?><?><?><?><?> chat <?><?><?><?><?><?> ppp
       <?><?><?><?><?><?><?> <?> "ssword:"
       <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>
       hello2u2 <?>

       <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>(carriage
       return)<?><?> <?><?><?><?><?><?><?><?><?><?>   <?><?><?><?>(character
       sequence)<?><?><?><?> <?><?><?><?><?><?><?><?><?><?><?><?>

       <?><?><?><?>(expect
       sequence)<?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?> <?><?><?><?><?><?><?><?><?>(time strings)<?>
       <?><?><?><?><?><?>(network iden- tification
       strings)<?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>

       <?><?><?><?><?><?><?><?><?><?><?><?><?>(initial sequence)
       <?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?> "ogin:"
       <?><?><?><?><?><?><?> "login:" <?> <?><?><?>  "l"
       <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?><?>
       "ogin:" <?><?><?> "login:" <?><?> "ssword" <?> <?><?> "password:" <?>

       <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>

              ogin: ppp ssword: hello2u2

       <?><?><?><?><?> <?><?> ...ogin:,  <?><?> ppp,  <?><?> ...ssword:,
       <?><?><?> hello2u2 <?>

       <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?><?><?><?><?><?>(sub-
       sequences)<?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?>

              ogin:--ogin: ppp ssword: hello2u2

       <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?> <?><?> login: <?><?><?><?><?>,
       <?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?><?><?>
       <?><?><?><?>(return sequence)<?><?><?><?><?><?><?><?><?><?> login:
       <?><?><?><?> <?><?><?><?><?><?><?><?> login
       <?><?><?><?><?><?><?><?><?><?><?>(empty line)<?><?>
       <?><?><?><?><?><?><?><?><?><?><?>

COMMENTS
       Comments can be embedded in the chat script. A comment is a line which
       starts with the # (hash) character in column 1. Such comment lines are
       just ignored by the chat program. If a '#' character is to be expected
       as the first character of the expect sequence, you should quote the
       expect string.  If you want to wait for a prompt that starts with a #
       (hash) character, you would have to write something like this:

              # Now wait for the prompt and send logout string
              '# ' logout

SENDING DATA FROM A FILE
       If the string to send starts with an at sign (@), the rest of the
       string is taken to be the name of a file to read to get the string to
       send.  If the last character of the data read is a newline, it is
       removed.  The file can be a named pipe (or fifo) instead of a regular
       file.  This provides a way for chat to communicate with another
       program, for example, a program to prompt the user and receive a
       password typed in.

<?><?><?><?><?> ABORT STRINGS
       <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?> CONNECTED <?><?> NO CARRIER <?><?> BUSY <?>
       <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?><?> BUSY
       <?><?><?><?><?><?> <?><?><?><?> NO CARRIER <?>

       <?><?><?><?><?><?><?><?><?><?><?> ABORT
       <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?><?>

              ABORT BUSY ABORT 'NO CARRIER' '' ATZ OK ATDT5551212 CONNECT

       <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?> ATZ
       <?><?><?><?><?><?><?><?><?><?> <?><?><?> OK
       <?><?><?><?><?><?><?><?><?><?> OK <?><?><?><?> ADTD5551212 <?><?><?>
       <?><?><?><?><?><?><?><?> CONNECT <?> <?><?><?><?> CONNECT
       <?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?> <?> BUSY <?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>(abort char- acter)<?>
       <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>(abort string)<?>
       <?><?>(fail)<?><?><?><?><?><?><?><?><?> NO CARRIER <?><?><?>
       <?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>
       chat <?><?><?><?>

CLR_ABORT STRINGS
       This sequence allows for clearing previously set ABORT strings.  ABORT
       strings are kept in an array of a pre-determined size (at compilation
       time); CLR_ABORT will reclaim the space for cleared entries so that new
       strings can use that space.

SAY STRINGS
       The SAY directive allows the script to send strings to the user at the
       terminal via standard error.  If chat is being run by pppd, and pppd is
       running as a daemon (detached from its controlling terminal), standard
       error will normally be redirected to the file /etc/ppp/connect-errors.

       SAY strings must be enclosed in single or double quotes. If carriage
       return and line feed are needed in the string to be output, you must
       explicitely add them to your string.

       The SAY strings could be used to give progress messages in sections of
       the script where you want to have 'ECHO OFF' but still let the user
       know what is happening.  An example is:

              ABORT BUSY
              ECHO OFF
              SAY "Dialling your ISP...\n"
              '' ATDT5551212
              TIMEOUT 120
              SAY "Waiting up to 2 minutes for connection ... "
              CONNECT ''
              SAY "Connected, now logging in ...0
              ogin: account
              ssword: pass
              $ SAY "Logged in OK ...0 etc ...

       This sequence will only present the SAY strings to the user and all the
       details of the script will remain hidden. For example, if the above
       script works, the user will see:

              Dialling your ISP...
              Waiting up to 2 minutes for connection ... Connected, now
              logging in ...
              Logged in OK ...

REPORT STRINGS
       A report string is similar to the ABORT string. The difference is that
       the strings, and all characters to the next control character such as a
       carriage return, are written to the report file.

       The report strings may be used to isolate the transmission rate of the
       modem's connect string and return the value to the chat user. The
       analysis of the report string logic occurs in conjunction with the
       other string processing such as looking for the expect string. The use
       of the same string for a report and abort sequence is probably not very
       useful, however, it is possible.

       The report strings to no change the completion code of the program.

       These "report" strings may be specified in the script using the REPORT
       sequence. It is written in the script as in the following example:

              REPORT CONNECT ABORT BUSY '' ATDT5551212 CONNECT '' ogin:
              account

       This sequence will expect nothing; and then send the string ATDT5551212
       to dial the telephone. The expected string is CONNECT. If the string
       CONNECT is received the remainder of the script is executed. In
       addition the program will write to the expect-file the string "CONNECT"
       plus any characters which follow it such as the connection rate.

CLR_REPORT STRINGS
       This sequence allows for clearing previously set REPORT strings.
       REPORT strings are kept in an array of a pre-determined size (at
       compilation time); CLR_REPORT will reclaim the space for cleared
       entries so that new strings can use that space.

ECHO
       The echo options controls whether the output from the modem is echoed
       to stderr. This option may be set with the -e option, but it can also
       be controlled by the ECHO keyword. The "expect-send" pair ECHO ON
       enables echoing, and ECHO OFF disables it. With this keyword you can
       select which parts of the conversation should be visible. For instance,
       with the following script:

              ABORT   'BUSY'
              ABORT   'NO CARRIER'
               ''
              ATZ
              OK\r\n  ATD1234567
              \r\n    \c
              ECHO    ON
              CONNECT \c
              ogin:   account

       all output resulting from modem configuration and dialing is not
       visible, but starting with the CONNECT (or BUSY) message, everything
       will be echoed.

HANGUP
       The HANGUP options control whether a modem hangup should be considered
       as an error or not.  This option is useful in scripts for dialling
       systems which will hang up and call your system back.  The HANGUP
       options can be ON or OFF.
       When HANGUP is set OFF and the modem hangs up (e.g., after the first
       stage of logging in to a callback system), chat will continue running
       the script (e.g., waiting for the incoming call and second stage login
       prompt). As soon as the incoming call is connected, you should use the
       HANGUP ON directive to reinstall normal hang up signal behavior.  Here
       is an (simple) example script:

              ABORT   'BUSY'
              ''      ATZ
              OK\r\n  ATD1234567
              \r\n    \c
              CONNECT \c
              'Callback login:' call_back_ID
              HANGUP OFF
              ABORT "Bad Login"
              'Callback Password:' Call_back_password
              TIMEOUT 120
              CONNECT \c
              HANGUP ON
              ABORT "NO CARRIER"
              ogin:--BREAK--ogin: real_account
              etc ...

<?><?> TIMEOUT
       <?><?><?><?><?><?><?> 45 <?><?><?><?><?><?> -t <?><?><?><?><?><?><?><?>

       <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>

              ATZ OK ATDT5551212 CONNECT TIMEOUT 10 ogin:--ogin: TIMEOUT 5
              assword: hello2u2

       <?><?><?><?><?><?> "login:" <?><?><?><?><?><?><?><?><?><?><?><?> 10
       <?><?> <?><?><?> <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?> 5 <?><?>

       <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>

SENDING <?><?> EOT
       EOT <?><?><?><?><?><?><?><?><?><?><?> chat <?><?><?><?><?><?><?><?> EOT
       <?><?><?><?> <?><?><?><?><?><?><?><?><?><?><?><?>(End-of-
       file)<?><?><?><?><?> <?> EOT <?><?><?>
       <?><?><?><?><?><?><?><?><?><?><?><?>(return)<?>

       <?><?> EOT <?><?><?><?><?> ^D <?><?><?><?><?><?><?><?><?><?><?><?>

<?><?><?><?> GENERATING BREAK
       BREAK
       <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?>
       <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>

       <?><?><?><?><?><?><?><?><?> \K  <?><?><?><?><?><?><?><?><?><?><?><?>

<?><?><?><?> ESCAPE SEQUENCES
       <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>
       <?><?><?><?><?><?><?><?><?><?><?> <?><?><?><?><?>

       ''     <?><?><?><?><?><?><?><?><?><?>(null string)
              <?><?><?><?><?><?><?><?><?><?>
              <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>
              <?>(apostrophe)<?><?><?><?><?><?><?><?><?><?><?>

       \b     <?><?><?><?><?><?>(backspace)<?><?><?>

       \c     <?><?><?><?><?><?><?><?><?><?><?><?>(newline)<?><?><?>
              <?><?><?><?><?><?><?>
              <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>
              <?><?><?><?><?><?> hello <?><?><?><?><?><?><?><?><?> h, e, l, l,
              o<?>  <?><?><?><?><?><?><?><?><?><?><?>

       \d     <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>
              sleep(1) <?><?><?>  <?><?><?><?><?><?><?><?><?>

       \K     <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>


              <?><?><?><?><?><?>(newline)<?><?><?>(linefeed)<?><?><?>

       \N     <?><?><?><?><?><?><?>(null character)<?><?><?><?><?><?><?><?><?>
                <?>  <?><?><?><?><?><?><?><?><?><?><?><?><?>

       \p     <?><?><?><?><?><?><?><?><?><?> 1/10
              <?><?><?><?><?><?><?><?><?><?><?><?><?>

       \q     <?><?><?><?><?><?> SYSLOG <?><?><?><?> ??????
              <?><?><?><?><?><?><?><?><?>
              <?><?><?><?><?><?><?><?><?><?><?><?><?><?>

       \r     <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>

       \s     <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>'HI
              TIM' <?><?> HI\sTIM <?><?><?><?><?>

       \t     <?><?><?><?><?><?><?><?><?>(tab)<?><?><?>

       \T     Send the phone number string as specified with the -T option
              (not valid in expect.)

       \U     Send the phone number 2 string as specified with the -U option
              (not valid in expect.)

           <?><?><?><?><?><?><?><?><?><?>(backslash)<?><?><?>

       \ddd   <?><?><?><?><?><?> (ddd) <?><?>(collapse)<?><?><?><?> ASCII
              <?><?><?>
              <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>

       ^C     <?><?><?><?><?> C
              <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?> DC1(17)  <?><?>
              ^Q <?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?><?>

ENVIRONMENT VARIABLES
       Environment variables are available within chat scripts, if  the -E
       option was specified in the command line. The metacharacter $ is used
       to introduce the name of the environment variable to substitute. If the
       substition fails, because the requested environment variable is not
       set, nothing is replaced for the variable.

TERMINATION CODES
       The chat program will terminate with the following completion codes.

       0      The normal termination of the program. This indicates that the
              script was executed without error to the normal conclusion.

       1      One or more of the parameters are invalid or an expect string
              was too large for the internal buffers. This indicates that the
              program as not properly executed.

       2      An error occurred during the execution of the program. This may
              be due to a read or write operation failing for some reason or
              chat receiving a signal such as SIGINT.

       3      A timeout event occurred when there was an expect string without
              having a "-subsend" string. This may mean that you did not
              program the script correctly for the condition or that some
              unexpected event has occurred and the expected string could not
              be found.

       4      The first string marked as an ABORT condition occurred.

       5      The second string marked as an ABORT condition occurred.

       6      The third string marked as an ABORT condition occurred.

       7      The fourth string marked as an ABORT condition occurred.

       ...    The other termination codes are also strings marked as an ABORT
              condition.

       Using the termination code, it is possible to determine which event
       terminated the script. It is possible to decide if the string "BUSY"
       was received from the modem as opposed to "NO DIAL TONE". While the
       first event may be retried, the second will probably have little chance
       of succeeding during a retry.

<?><?> SEE ALSO
       <?><?> chat <?><?><?><?><?><?><?><?><?><?><?> UUCP
       <?><?><?><?><?><?>chat <?><?><?> <?><?><?><?> uucico
       <?><?><?><?><?><?><?><?><?><?><?><?>

       uucico(1), uucp(1)

COPYRIGHT
       The chat program is in public domain. This is not the GNU public
       license. If it breaks then you get to keep both pieces.


[<?><?><?><?><?><?>]
       asdchen <asdchen@pc2.hinet.net>

[<?><?><?><?><?><?><?>]
       1995/09/30

<?><?><?>linux<?><?>man<?><?><?><?><?><?><?>:
       http://cmpp.linuxforum.net

<?>
       <?><?><?><?><?><?><?><?><?> man <?><?><?><?><?><?><?><?>
       <?><?> man <?><?><?><?><?><?>https://github.com/man-pages-zh/manpages-
       zh

Chat Version 1.22                 22 May 1999                          CHAT(8)