Initial revision

6 files changed, 2363 insertions, 0 deletions

diff --git a/mdk-stage1/ppp/chat/Makefile.linux b/mdk-stage1/ppp/chat/Makefile.linux
new file mode 100644
index 000000000..586cbd876
--- /dev/null
+++ b/mdk-stage1/ppp/chat/Makefile.linux
@@ -0,0 +1,27 @@
+#	$Id$
+
+CDEF1=	-DTERMIOS			# Use the termios structure
+CDEF2=	-DSIGTYPE=void			# Standard definition
+CDEF3=	-UNO_SLEEP			# Use the usleep function
+CDEF4=	-DFNDELAY=O_NDELAY		# Old name value
+CDEFS=	$(CDEF1) $(CDEF2) $(CDEF3) $(CDEF4)
+
+CFLAGS=	$(RPM_OPT_FLAGS) $(CDEFS)
+
+INSTALL= install
+
+all:	chat
+
+chat:	chat.o
+	$(CC) -o chat chat.o
+
+chat.o:	chat.c
+	$(CC) -c $(CFLAGS) -o chat.o chat.c
+
+install: chat
+	mkdir -p $(BINDIR)
+	$(INSTALL) -s -c chat $(BINDIR)
+	$(INSTALL) -c -m 644 chat.8 $(MANDIR)/man8
+
+clean:
+	rm -f chat.o chat *~
diff --git a/mdk-stage1/ppp/chat/Makefile.linux.makeopt b/mdk-stage1/ppp/chat/Makefile.linux.makeopt
new file mode 100644
index 000000000..974680a93
--- /dev/null
+++ b/mdk-stage1/ppp/chat/Makefile.linux.makeopt
@@ -0,0 +1,27 @@
+#	$Id$
+
+CDEF1=	-DTERMIOS			# Use the termios structure
+CDEF2=	-DSIGTYPE=void			# Standard definition
+CDEF3=	-UNO_SLEEP			# Use the usleep function
+CDEF4=	-DFNDELAY=O_NDELAY		# Old name value
+CDEFS=	$(CDEF1) $(CDEF2) $(CDEF3) $(CDEF4)
+
+CFLAGS=	-O2 -g -pipe $(CDEFS)
+
+INSTALL= install
+
+all:	chat
+
+chat:	chat.o
+	$(CC) -o chat chat.o
+
+chat.o:	chat.c
+	$(CC) -c $(CFLAGS) -o chat.o chat.c
+
+install: chat
+	mkdir -p $(BINDIR)
+	$(INSTALL) -s -c chat $(BINDIR)
+	$(INSTALL) -c -m 644 chat.8 $(MANDIR)/man8
+
+clean:
+	rm -f chat.o chat *~
diff --git a/mdk-stage1/ppp/chat/Makefile.sol2 b/mdk-stage1/ppp/chat/Makefile.sol2
new file mode 100644
index 000000000..f566cc68b
--- /dev/null
+++ b/mdk-stage1/ppp/chat/Makefile.sol2
@@ -0,0 +1,19 @@
+#
+# Makefile for chat on Solaris 2
+#
+
+include ../solaris/Makedefs
+
+CFLAGS = $(COPTS) -DNO_USLEEP -DSOL2
+
+all:	chat
+
+chat: chat.o
+	$(CC) -o chat chat.o
+
+install: chat
+	$(INSTALL) -f $(BINDIR) chat
+	$(INSTALL) -m 444 -f $(MANDIR)/man8 chat.8
+
+clean:
+	rm -f *~ *.o chat
diff --git a/mdk-stage1/ppp/chat/Makefile.sunos4 b/mdk-stage1/ppp/chat/Makefile.sunos4
new file mode 100644
index 000000000..b3507360e
--- /dev/null
+++ b/mdk-stage1/ppp/chat/Makefile.sunos4
@@ -0,0 +1,19 @@
+#
+# Makefile for chat on suns
+#
+
+include ../sunos4/Makedefs
+
+CFLAGS = -DSUNOS $(COPTS)
+
+all:	chat
+
+chat: chat.o
+	$(CC) -o chat chat.o
+
+install: chat
+	$(INSTALL) -c chat $(BINDIR)/chat
+	$(INSTALL) -c -m 444 chat.8 $(MANDIR)/man8/chat.8
+
+clean:
+	rm -f *~ *.o chat
diff --git a/mdk-stage1/ppp/chat/chat.8 b/mdk-stage1/ppp/chat/chat.8
new file mode 100644
index 000000000..8d2029609
--- /dev/null
+++ b/mdk-stage1/ppp/chat/chat.8
@@ -0,0 +1,515 @@
+.\" -*- nroff -*-
+.\" manual page [] for chat 1.8
+.\" $Id$
+.\" SH section heading
+.\" SS subsection heading
+.\" LP paragraph
+.\" IP indented paragraph
+.\" TP hanging label
+.TH CHAT 8 "22 May 1999" "Chat Version 1.22"
+.SH NAME
+chat \- Automated conversational script with a modem
+.SH SYNOPSIS
+.B chat
+[
+.I options
+]
+.I script
+.SH DESCRIPTION
+.LP
+The \fIchat\fR program defines a conversational exchange between the
+computer and the modem. Its primary purpose is to establish the
+connection between the Point-to-Point Protocol Daemon (\fIpppd\fR) and
+the remote's \fIpppd\fR process.
+.SH OPTIONS
+.TP
+.B -f \fI<chat file>
+Read the chat script from the chat \fIfile\fR. The use of this option
+is mutually exclusive with the chat script parameters. The user must
+have read access to the file. Multiple lines are permitted in the
+file. Space or horizontal tab characters should be used to separate
+the strings.
+.TP
+.B -t \fI<timeout>
+Set the timeout for the expected string to be received. If the string
+is not received within the time limit then the reply string is not
+sent. An alternate reply may be sent or the script will fail if there
+is no alternate reply string. A failed script will cause the
+\fIchat\fR program to terminate with a non-zero error code.
+.TP
+.B -r \fI<report file>
+Set the file for output of the report strings. If you use the keyword
+\fIREPORT\fR, the resulting strings are written to this file. If this
+option is not used and you still use \fIREPORT\fR keywords, the
+\fIstderr\fR file is used for the report strings.
+.TP
+.B -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 \fIECHO\fR
+keyword. When echoing is enabled, all output from the modem is echoed
+to \fIstderr\fR.
+.TP
+.B -E
+Enables environment variable substituion within chat scripts using the
+standard \fI$xxx\fR syntax.
+.TP
+.B -v
+Request that the \fIchat\fR script be executed in a verbose mode. The
+\fIchat\fR program will then log the execution state of the chat
+script as well as all text received from the modem and the output
+strings sent to the modem.  The default is to log through the SYSLOG;
+the logging method may be altered with the -S and -s flags.
+.TP
+.B -V
+Request that the \fIchat\fR script be executed in a stderr verbose
+mode. The \fIchat\fR 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.
+.TP
+.B -s
+Use stderr.  All log messages from '-v' and all error messages will be
+sent to stderr.
+.TP
+.B -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.
+.TP
+.B -T \fI<phone number>
+Pass in an arbitary string, usually a phone number, that will be
+substituted for the \\T substitution metacharacter in a send string.
+.TP
+.B -U \fI<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.
+.TP
+.B script
+If the script is not specified in a file with the \fI-f\fR option then
+the script is included as parameters to the \fIchat\fR program.
+.SH CHAT SCRIPT
+.LP
+The \fIchat\fR script defines the communications.
+.LP
+A script consists of one or more "expect-send" pairs of strings,
+separated by spaces, with an optional "subexpect-subsend" string pair,
+separated by a dash as in the following example:
+.IP
+ogin:-BREAK-ogin: ppp ssword: hello2u2
+.LP
+This line indicates that the \fIchat\fR program should expect the string
+"ogin:". If it fails to receive a login prompt within the time interval
+allotted, it is to send a break sequence to the remote and then expect the
+string "ogin:". If the first "ogin:" is received then the break sequence is
+not generated.
+.LP
+Once it received the login prompt the \fIchat\fR program will send the
+string ppp and then expect the prompt "ssword:". When it receives the
+prompt for the password, it will send the password hello2u2.
+.LP
+A carriage return is normally sent following the reply string. It is not
+expected in the "expect" string unless it is specifically requested by using
+the \\r character sequence.
+.LP
+The expect sequence should contain only what is needed to identify the
+string. Since it is normally stored on a disk file, it should not contain
+variable information. It is generally not acceptable to look for time
+strings, network identification strings, or other variable pieces of data as
+an expect string.
+.LP
+To help correct for characters which may be corrupted during the initial
+sequence, look for the string "ogin:" rather than "login:". It is possible
+that the leading "l" character may be received in error and you may never
+find the string even though it was sent by the system. For this reason,
+scripts look for "ogin:" rather than "login:" and "ssword:" rather than
+"password:".
+.LP
+A very simple script might look like this:
+.IP
+ogin: ppp ssword: hello2u2
+.LP
+In other words, expect ....ogin:, send ppp, expect ...ssword:, send hello2u2.
+.LP
+In actual practice, simple scripts are rare. At the vary least, you
+should include sub-expect sequences should the original string not be
+received. For example, consider the following script:
+.IP
+ogin:--ogin: ppp ssword: hello2u2
+.LP
+This would be a better script than the simple one used earlier. This would look
+for the same login: prompt, however, if one was not received, a single
+return sequence is sent and then it will look for login: again. Should line
+noise obscure the first login prompt then sending the empty line will
+usually generate a login prompt again.
+.SH COMMENTS
+Comments can be embedded in the chat script. A comment is a line which
+starts with the \fB#\fR (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:
+.IP
+# Now wait for the prompt and send logout string
+.br
+\'# ' logout
+.LP
+
+.SH 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 \fBchat\fR to communicate with another
+program, for example, a program to prompt the user and receive a
+password typed in.
+.LP
+
+.SH ABORT STRINGS
+Many modems will report the status of the call as a string. These
+strings may be \fBCONNECTED\fR or \fBNO CARRIER\fR or \fBBUSY\fR. It
+is often desirable to terminate the script should the modem fail to
+connect to the remote. The difficulty is that a script would not know
+exactly which modem string it may receive. On one attempt, it may
+receive \fBBUSY\fR while the next time it may receive \fBNO CARRIER\fR.
+.LP
+These "abort" strings may be specified in the script using the \fIABORT\fR
+sequence. It is written in the script as in the following example:
+.IP
+ABORT BUSY ABORT 'NO CARRIER' '' ATZ OK ATDT5551212 CONNECT
+.LP
+This sequence will expect nothing; and then send the string ATZ. The
+expected response to this is the string \fIOK\fR. When it receives \fIOK\fR,
+the string ATDT5551212 to dial the telephone. The expected string is
+\fICONNECT\fR. If the string \fICONNECT\fR is received the remainder of the
+script is executed. However, should the modem find a busy telephone, it will
+send the string \fIBUSY\fR. This will cause the string to match the abort
+character sequence. The script will then fail because it found a match to
+the abort string. If it received the string \fINO CARRIER\fR, it will abort
+for the same reason. Either string may be received. Either string will
+terminate the \fIchat\fR script.
+.SH CLR_ABORT STRINGS
+This sequence allows for clearing previously set \fBABORT\fR strings.
+\fBABORT\fR strings are kept in an array of a pre-determined size (at
+compilation time); \fBCLR_ABORT\fR will reclaim the space for cleared
+entries so that new strings can use that space.
+.SH SAY STRINGS
+The \fBSAY\fR directive allows the script to send strings to the user
+at the terminal via standard error.  If \fBchat\fR 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.
+.LP
+\fBSAY\fR 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.
+.LP
+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:
+.IP
+ABORT BUSY 
+.br
+ECHO OFF 
+.br
+SAY "Dialling your ISP...\\n" 
+.br
+\'' ATDT5551212 
+.br
+TIMEOUT 120
+.br
+SAY "Waiting up to 2 minutes for connection ... "
+.br
+CONNECT '' 
+.br
+SAY "Connected, now logging in ...\n"
+.br
+ogin: account
+.br
+ssword: pass
+.br
+$ \c
+SAY "Logged in OK ...\n"
+\fIetc ...\fR
+.LP
+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:
+.IP
+Dialling your ISP...
+.br
+Waiting up to 2 minutes for connection ... Connected, now logging in ...
+.br
+Logged in OK ...
+.LP
+
+.SH REPORT STRINGS
+A \fBreport\fR 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.
+.LP
+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.
+.LP
+The report strings to no change the completion code of the program.
+.LP
+These "report" strings may be specified in the script using the \fIREPORT\fR
+sequence. It is written in the script as in the following example:
+.IP
+REPORT CONNECT ABORT BUSY '' ATDT5551212 CONNECT '' ogin: account
+.LP
+This sequence will expect nothing; and then send the string
+ATDT5551212 to dial the telephone. The expected string is
+\fICONNECT\fR. If the string \fICONNECT\fR 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.
+.SH CLR_REPORT STRINGS
+This sequence allows for clearing previously set \fBREPORT\fR strings.
+\fBREPORT\fR strings are kept in an array of a pre-determined size (at
+compilation time); \fBCLR_REPORT\fR will reclaim the space for cleared
+entries so that new strings can use that space.
+.SH ECHO
+The echo options controls whether the output from the modem is echoed
+to \fIstderr\fR. This option may be set with the \fI-e\fR option, but
+it can also be controlled by the \fIECHO\fR keyword. The "expect-send"
+pair \fIECHO\fR \fION\fR enables echoing, and \fIECHO\fR \fIOFF\fR
+disables it. With this keyword you can select which parts of the
+conversation should be visible. For instance, with the following
+script:
+.IP
+ABORT   'BUSY'
+.br
+ABORT   'NO CARRIER'
+.br
+''      ATZ
+.br
+OK\\r\\n  ATD1234567
+.br
+\\r\\n    \\c
+.br
+ECHO    ON
+.br
+CONNECT \\c
+.br
+ogin:   account
+.LP
+all output resulting from modem configuration and dialing is not visible,
+but starting with the \fICONNECT\fR (or \fIBUSY\fR) message, everything
+will be echoed.
+.SH 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 \fBON\fR or \fBOFF\fR.
+.br
+When HANGUP is set OFF and the modem hangs up (e.g., after the first
+stage of logging in to a callback system), \fBchat\fR 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 \fBHANGUP ON\fR directive to reinstall normal hang up
+signal behavior.  Here is an (simple) example script:
+.IP
+ABORT   'BUSY'
+.br
+''      ATZ
+.br
+OK\\r\\n  ATD1234567
+.br
+\\r\\n    \\c
+.br
+CONNECT \\c
+.br
+\'Callback login:' call_back_ID
+.br
+HANGUP OFF
+.br
+ABORT "Bad Login"
+.br
+\'Callback Password:' Call_back_password
+.br
+TIMEOUT 120
+.br
+CONNECT \\c
+.br
+HANGUP ON
+.br
+ABORT "NO CARRIER"
+.br
+ogin:--BREAK--ogin: real_account
+.br
+\fIetc ...\fR
+.LP
+.SH TIMEOUT
+The initial timeout value is 45 seconds. This may be changed using the \fB-t\fR
+parameter.
+.LP
+To change the timeout value for the next expect string, the following
+example may be used:
+.IP
+ATZ OK ATDT5551212 CONNECT TIMEOUT 10 ogin:--ogin: TIMEOUT 5 assword: hello2u2
+.LP
+This will change the timeout to 10 seconds when it expects the login:
+prompt. The timeout is then changed to 5 seconds when it looks for the
+password prompt.
+.LP
+The timeout, once changed, remains in effect until it is changed again.
+.SH SENDING EOT
+The special reply string of \fIEOT\fR indicates that the chat program
+should send an EOT character to the remote. This is normally the
+End-of-file character sequence. A return character is not sent
+following the EOT.
+.PR
+The EOT sequence may be embedded into the send string using the
+sequence \fI^D\fR.
+.SH GENERATING BREAK
+The special reply string of \fIBREAK\fR will cause a break condition
+to be sent. The break is a special signal on the transmitter. The
+normal processing on the receiver is to change the transmission rate.
+It may be used to cycle through the available transmission rates on
+the remote until you are able to receive a valid login prompt.
+.PR
+The break sequence may be embedded into the send string using the
+\fI\\K\fR sequence.
+.SH ESCAPE SEQUENCES
+The expect and reply strings may contain escape sequences. All of the
+sequences are legal in the reply string. Many are legal in the expect.
+Those which are not valid in the expect sequence are so indicated.
+.TP
+.B ''
+Expects or sends a null string. If you send a null string then it will still
+send the return character. This sequence may either be a pair of apostrophe
+or quote characters.
+.TP
+.B \\\\b
+represents a backspace character.
+.TP
+.B \\\\c
+Suppresses the newline at the end of the reply string. This is the only
+method to send a string without a trailing return character. It must
+be at the end of the send string. For example,
+the sequence hello\\c will simply send the characters h, e, l, l, o.
+.I (not valid in expect.)
+.TP
+.B \\\\d
+Delay for one second. The program uses sleep(1) which will delay to a
+maximum of one second.
+.I (not valid in expect.)
+.TP
+.B \\\\K
+Insert a BREAK
+.I (not valid in expect.)
+.TP
+.B \\\\n
+Send a newline or linefeed character.
+.TP
+.B \\\\N
+Send a null character. The same sequence may be represented by \\0.
+.I (not valid in expect.)
+.TP
+.B \\\\p
+Pause for a fraction of a second. The delay is 1/10th of a second.
+.I (not valid in expect.)
+.TP
+.B \\\\q
+Suppress writing the string to the SYSLOG file. The string ?????? is
+written to the log in its place.
+.I (not valid in expect.)
+.TP
+.B \\\\r
+Send or expect a carriage return.
+.TP
+.B \\\\s
+Represents a space character in the string. This may be used when it
+is not desirable to quote the strings which contains spaces. The
+sequence 'HI TIM' and HI\\sTIM are the same.
+.TP
+.B \\\\t
+Send or expect a tab character.
+.TP
+.B \\\\T
+Send the phone number string as specified with the \fI-T\fR option
+.I (not valid in expect.)
+.TP
+.B \\\\U
+Send the phone number 2 string as specified with the \fI-U\fR option
+.I (not valid in expect.)
+.TP
+.B \\\\\\\\
+Send or expect a backslash character.
+.TP
+.B \\\\ddd
+Collapse the octal digits (ddd) into a single ASCII character and send that
+character.
+.I (some characters are not valid in expect.)
+.TP
+.B \^^C
+Substitute the sequence with the control character represented by C.
+For example, the character DC1 (17) is shown as \^^Q.
+.I (some characters are not valid in expect.)
+.SH ENVIRONMENT VARIABLES
+Environment variables are available within chat scripts, if  the \fI-E\fR
+option was specified in the command line. The metacharacter \fI$\fR is used
+to introduce the name of the environment variable to substitute. If the
+substition fails, because the requested environment variable is not set,
+\fInothing\fR is replaced for the variable.
+.SH TERMINATION CODES
+The \fIchat\fR program will terminate with the following completion
+codes.
+.TP
+.B 0
+The normal termination of the program. This indicates that the script
+was executed without error to the normal conclusion.
+.TP
+.B 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.
+.TP
+.B 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.
+.TP
+.B 3
+A timeout event occurred when there was an \fIexpect\fR 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.
+.TP
+.B 4
+The first string marked as an \fIABORT\fR condition occurred.
+.TP
+.B 5
+The second string marked as an \fIABORT\fR condition occurred.
+.TP
+.B 6
+The third string marked as an \fIABORT\fR condition occurred.
+.TP
+.B 7
+The fourth string marked as an \fIABORT\fR condition occurred.
+.TP
+.B ...
+The other termination codes are also strings marked as an \fIABORT\fR
+condition.
+.LP
+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.
+.SH SEE ALSO
+Additional information about \fIchat\fR scripts may be found with UUCP
+documentation. The \fIchat\fR script was taken from the ideas proposed
+by the scripts used by the \fIuucico\fR program.
+.LP
+uucico(1), uucp(1)
+.SH COPYRIGHT
+The \fIchat\fR program is in public domain. This is not the GNU public
+license. If it breaks then you get to keep both pieces.
diff --git a/mdk-stage1/ppp/chat/chat.c b/mdk-stage1/ppp/chat/chat.c
new file mode 100644
index 000000000..1b22907a8
--- /dev/null
+++ b/mdk-stage1/ppp/chat/chat.c
@@ -0,0 +1,1756 @@
+/*
+ *	Chat -- a program for automatic session establishment (i.e. dial
+ *		the phone and log in).
+ *
+ * Standard termination codes:
+ *  0 - successful completion of the script
+ *  1 - invalid argument, expect string too large, etc.
+ *  2 - error on an I/O operation or fatal error condition.
+ *  3 - timeout waiting for a simple string.
+ *  4 - the first string declared as "ABORT"
+ *  5 - the second string declared as "ABORT"
+ *  6 - ... and so on for successive ABORT strings.
+ *
+ *	This software is in the public domain.
+ *
+ * -----------------
+ *	22-May-99 added environment substitutuion, enabled with -E switch.
+ *	Andreas Arens <andras@cityweb.de>.
+ *
+ *	12-May-99 added a feature to read data to be sent from a file,
+ *	if the send string starts with @.  Idea from gpk <gpk@onramp.net>.
+ *
+ *	added -T and -U option and \T and \U substitution to pass a phone
+ *	number into chat script. Two are needed for some ISDN TA applications.
+ *	Keith Dart <kdart@cisco.com>
+ *	
+ *
+ *	Added SAY keyword to send output to stderr.
+ *      This allows to turn ECHO OFF and to output specific, user selected,
+ *      text to give progress messages. This best works when stderr
+ *      exists (i.e.: pppd in nodetach mode).
+ *
+ * 	Added HANGUP directives to allow for us to be called
+ *      back. When HANGUP is set to NO, chat will not hangup at HUP signal.
+ *      We rely on timeouts in that case.
+ *
+ *      Added CLR_ABORT to clear previously set ABORT string. This has been
+ *      dictated by the HANGUP above as "NO CARRIER" (for example) must be
+ *      an ABORT condition until we know the other host is going to close
+ *      the connection for call back. As soon as we have completed the
+ *      first stage of the call back sequence, "NO CARRIER" is a valid, non
+ *      fatal string. As soon as we got called back (probably get "CONNECT"),
+ *      we should re-arm the ABORT "NO CARRIER". Hence the CLR_ABORT command.
+ *      Note that CLR_ABORT packs the abort_strings[] array so that we do not
+ *      have unused entries not being reclaimed.
+ *
+ *      In the same vein as above, added CLR_REPORT keyword.
+ *
+ *      Allow for comments. Line starting with '#' are comments and are
+ *      ignored. If a '#' is to be expected as the first character, the 
+ *      expect string must be quoted.
+ *
+ *
+ *		Francis Demierre <Francis@SwissMail.Com>
+ * 		Thu May 15 17:15:40 MET DST 1997
+ *
+ *
+ *      Added -r "report file" switch & REPORT keyword.
+ *              Robert Geer <bgeer@xmission.com>
+ *
+ *      Added -s "use stderr" and -S "don't use syslog" switches.
+ *              June 18, 1997
+ *              Karl O. Pinc <kop@meme.com>
+ *
+ *
+ *	Added -e "echo" switch & ECHO keyword
+ *		Dick Streefland <dicks@tasking.nl>
+ *
+ *
+ *	Considerable updates and modifications by
+ *		Al Longyear <longyear@pobox.com>
+ *		Paul Mackerras <paulus@cs.anu.edu.au>
+ *
+ *
+ *	The original author is:
+ *
+ *		Karl Fox <karl@MorningStar.Com>
+ *		Morning Star Technologies, Inc.
+ *		1760 Zollinger Road
+ *		Columbus, OH  43221
+ *		(614)451-1883
+ *
+ */
+
+#ifndef __STDC__
+#define const
+#endif
+
+#ifndef lint
+static const char rcsid[] = "$Id$";
+#endif
+
+#include <stdio.h>
+#include <ctype.h>
+#include <time.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <syslog.h>
+
+#ifndef TERMIO
+#undef	TERMIOS
+#define TERMIOS
+#endif
+
+#ifdef TERMIO
+#include <termio.h>
+#endif
+#ifdef TERMIOS
+#include <termios.h>
+#endif
+
+#define	STR_LEN	1024
+
+#ifndef SIGTYPE
+#define SIGTYPE void
+#endif
+
+#undef __P
+#undef __V
+
+#ifdef __STDC__
+#include <stdarg.h>
+#define __V(x)	x
+#define __P(x)	x
+#else
+#include <varargs.h>
+#define __V(x)	(va_alist) va_dcl
+#define __P(x)	()
+#define const
+#endif
+
+#ifndef O_NONBLOCK
+#define O_NONBLOCK	O_NDELAY
+#endif
+
+#ifdef SUNOS
+extern int sys_nerr;
+extern char *sys_errlist[];
+#define memmove(to, from, n)	bcopy(from, to, n)
+#define strerror(n)		((unsigned)(n) < sys_nerr? sys_errlist[(n)] :\
+				 "unknown error")
+#endif
+
+/*************** Micro getopt() *********************************************/
+#define	OPTION(c,v)	(_O&2&&**v?*(*v)++:!c||_O&4?0:(!(_O&1)&& \
+				(--c,++v),_O=4,c&&**v=='-'&&v[0][1]?*++*v=='-'\
+				&&!v[0][1]?(--c,++v,0):(_O=2,*(*v)++):0))
+#define	OPTARG(c,v)	(_O&2?**v||(++v,--c)?(_O=1,--c,*v++): \
+				(_O=4,(char*)0):(char*)0)
+#define	OPTONLYARG(c,v)	(_O&2&&**v?(_O=1,--c,*v++):(char*)0)
+#define	ARG(c,v)	(c?(--c,*v++):(char*)0)
+
+static int _O = 0;		/* Internal state */
+/*************** Micro getopt() *********************************************/
+
+char *program_name;
+
+#define	MAX_ABORTS		50
+#define	MAX_REPORTS		50
+#define	DEFAULT_CHAT_TIMEOUT	45
+
+int echo          = 0;
+int verbose       = 0;
+int to_log        = 1;
+int to_stderr     = 0;
+int Verbose       = 0;
+int quiet         = 0;
+int report        = 0;
+int use_env       = 0;
+int exit_code     = 0;
+FILE* report_fp   = (FILE *) 0;
+char *report_file = (char *) 0;
+char *chat_file   = (char *) 0;
+char *phone_num   = (char *) 0;
+char *phone_num2  = (char *) 0;
+int timeout       = DEFAULT_CHAT_TIMEOUT;
+
+int have_tty_parameters = 0;
+
+#ifdef TERMIO
+#define term_parms struct termio
+#define get_term_param(param) ioctl(0, TCGETA, param)
+#define set_term_param(param) ioctl(0, TCSETA, param)
+struct termio saved_tty_parameters;
+#endif
+
+#ifdef TERMIOS
+#define term_parms struct termios
+#define get_term_param(param) tcgetattr(0, param)
+#define set_term_param(param) tcsetattr(0, TCSANOW, param)
+struct termios saved_tty_parameters;
+#endif
+
+char *abort_string[MAX_ABORTS], *fail_reason = (char *)0,
+	fail_buffer[50];
+int n_aborts = 0, abort_next = 0, timeout_next = 0, echo_next = 0;
+int clear_abort_next = 0;
+
+char *report_string[MAX_REPORTS] ;
+char  report_buffer[50] ;
+int n_reports = 0, report_next = 0, report_gathering = 0 ; 
+int clear_report_next = 0;
+
+int say_next = 0, hup_next = 0;
+
+void *dup_mem __P((void *b, size_t c));
+void *copy_of __P((char *s));
+void usage __P((void));
+void logf __P((const char *fmt, ...));
+void fatal __P((int code, const char *fmt, ...));
+SIGTYPE sigalrm __P((int signo));
+SIGTYPE sigint __P((int signo));
+SIGTYPE sigterm __P((int signo));
+SIGTYPE sighup __P((int signo));
+void unalarm __P((void));
+void init __P((void));
+void set_tty_parameters __P((void));
+void echo_stderr __P((int));
+void break_sequence __P((void));
+void terminate __P((int status));
+void do_file __P((char *chat_file));
+int  get_string __P((register char *string));
+int  put_string __P((register char *s));
+int  write_char __P((int c));
+int  put_char __P((int c));
+int  get_char __P((void));
+void chat_send __P((register char *s));
+char *character __P((int c));
+void chat_expect __P((register char *s));
+char *clean __P((register char *s, int sending));
+void break_sequence __P((void));
+void terminate __P((int status));
+void pack_array __P((char **array, int end));
+char *expect_strtok __P((char *, char *));
+int vfmtmsg __P((char *, int, const char *, va_list));	/* vsprintf++ */
+
+int main __P((int, char *[]));
+
+void *dup_mem(b, c)
+void *b;
+size_t c;
+{
+    void *ans = malloc (c);
+    if (!ans)
+	fatal(2, "memory error!");
+
+    memcpy (ans, b, c);
+    return ans;
+}
+
+void *copy_of (s)
+char *s;
+{
+    return dup_mem (s, strlen (s) + 1);
+}
+
+/*
+ * chat [ -v ] [ -E ] [ -T number ] [ -U number ] [ -t timeout ] [ -f chat-file ] \
+ * [ -r report-file ] \
+ *		[...[[expect[-say[-expect...]] say expect[-say[-expect]] ...]]]
+ *
+ *	Perform a UUCP-dialer-like chat script on stdin and stdout.
+ */
+int
+main(argc, argv)
+     int argc;
+     char **argv;
+{
+    int option;
+    char *arg;
+
+    program_name = *argv;
+    tzset();
+
+    while ((option = OPTION(argc, argv)) != 0) {
+	switch (option) {
+	case 'e':
+	    ++echo;
+	    break;
+
+	case 'E':
+	    ++use_env;
+	    break;
+
+	case 'v':
+	    ++verbose;
+	    break;
+
+	case 'V':
+	    ++Verbose;
+	    break;
+
+	case 's':
+	    ++to_stderr;
+	    break;
+
+	case 'S':
+	    to_log = 0;
+	    break;
+
+	case 'f':
+	    if ((arg = OPTARG(argc, argv)) != NULL)
+		    chat_file = copy_of(arg);
+	    else
+		usage();
+	    break;
+
+	case 't':
+	    if ((arg = OPTARG(argc, argv)) != NULL)
+		timeout = atoi(arg);
+	    else
+		usage();
+	    break;
+
+	case 'r':
+	    arg = OPTARG (argc, argv);
+	    if (arg) {
+		if (report_fp != NULL)
+		    fclose (report_fp);
+		report_file = copy_of (arg);
+		report_fp   = fopen (report_file, "a");
+		if (report_fp != NULL) {
+		    if (verbose)
+			fprintf (report_fp, "Opening \"%s\"...\n",
+				 report_file);
+		    report = 1;
+		}
+	    }
+	    break;
+
+	case 'T':
+	    if ((arg = OPTARG(argc, argv)) != NULL)
+		phone_num = copy_of(arg);
+	    else
+		usage();
+	    break;
+
+	case 'U':
+	    if ((arg = OPTARG(argc, argv)) != NULL)
+		phone_num2 = copy_of(arg);
+	    else
+		usage();
+	    break;
+
+	default:
+	    usage();
+	    break;
+	}
+    }
+/*
+ * Default the report file to the stderr location
+ */
+    if (report_fp == NULL)
+	report_fp = stderr;
+
+    if (to_log) {
+#ifdef ultrix
+	openlog("chat", LOG_PID);
+#else
+	openlog("chat", LOG_PID | LOG_NDELAY, LOG_LOCAL2);
+
+	if (verbose)
+	    setlogmask(LOG_UPTO(LOG_INFO));
+	else
+	    setlogmask(LOG_UPTO(LOG_WARNING));
+#endif
+    }
+
+    init();
+    
+    if (chat_file != NULL) {
+	arg = ARG(argc, argv);
+	if (arg != NULL)
+	    usage();
+	else
+	    do_file (chat_file);
+    } else {
+	while ((arg = ARG(argc, argv)) != NULL) {
+	    chat_expect(arg);
+
+	    if ((arg = ARG(argc, argv)) != NULL)
+		chat_send(arg);
+	}
+    }
+
+    terminate(0);
+    return 0;
+}
+
+/*
+ *  Process a chat script when read from a file.
+ */
+
+void do_file (chat_file)
+char *chat_file;
+{
+    int linect, sendflg;
+    char *sp, *arg, quote;
+    char buf [STR_LEN];
+    FILE *cfp;
+
+    cfp = fopen (chat_file, "r");
+    if (cfp == NULL)
+	fatal(1, "%s -- open failed: %m", chat_file);
+
+    linect = 0;
+    sendflg = 0;
+
+    while (fgets(buf, STR_LEN, cfp) != NULL) {
+	sp = strchr (buf, '\n');
+	if (sp)
+	    *sp = '\0';
+
+	linect++;
+	sp = buf;
+
+        /* lines starting with '#' are comments. If a real '#'
+           is to be expected, it should be quoted .... */
+        if ( *sp == '#' )
+	    continue;
+
+	while (*sp != '\0') {
+	    if (*sp == ' ' || *sp == '\t') {
+		++sp;
+		continue;
+	    }
+
+	    if (*sp == '"' || *sp == '\'') {
+		quote = *sp++;
+		arg = sp;
+		while (*sp != quote) {
+		    if (*sp == '\0')
+			fatal(1, "unterminated quote (line %d)", linect);
+
+		    if (*sp++ == '\\') {
+			if (*sp != '\0')
+			    ++sp;
+		    }
+		}
+	    }
+	    else {
+		arg = sp;
+		while (*sp != '\0' && *sp != ' ' && *sp != '\t')
+		    ++sp;
+	    }
+
+	    if (*sp != '\0')
+		*sp++ = '\0';
+
+	    if (sendflg)
+		chat_send (arg);
+	    else
+		chat_expect (arg);
+	    sendflg = !sendflg;
+	}
+    }
+    fclose (cfp);
+}
+
+/*
+ *	We got an error parsing the command line.
+ */
+void usage()
+{
+    fprintf(stderr, "\
+Usage: %s [-e] [-E] [-v] [-V] [-t timeout] [-r report-file]\n\
+     [-T phone-number] [-U phone-number2] {-f chat-file | chat-script}\n", program_name);
+    exit(1);
+}
+
+char line[1024];
+
+/*
+ * Send a message to syslog and/or stderr.
+ */
+void logf __V((const char *fmt, ...))
+{
+    va_list args;
+
+#ifdef __STDC__
+    va_start(args, fmt);
+#else
+    char *fmt;
+    va_start(args);
+    fmt = va_arg(args, char *);
+#endif
+
+    vfmtmsg(line, sizeof(line), fmt, args);
+    if (to_log)
+	syslog(LOG_INFO, "%s", line);
+    if (to_stderr)
+	fprintf(stderr, "%s\n", line);
+}
+
+/*
+ *	Print an error message and terminate.
+ */
+
+void fatal __V((int code, const char *fmt, ...))
+{
+    va_list args;
+
+#ifdef __STDC__
+    va_start(args, fmt);
+#else
+    int code;
+    char *fmt;
+    va_start(args);
+    code = va_arg(args, int);
+    fmt = va_arg(args, char *);
+#endif
+
+    vfmtmsg(line, sizeof(line), fmt, args);
+    if (to_log)
+	syslog(LOG_ERR, "%s", line);
+    if (to_stderr)
+	fprintf(stderr, "%s\n", line);
+    terminate(code);
+}
+
+int alarmed = 0;
+
+SIGTYPE sigalrm(signo)
+int signo;
+{
+    int flags;
+
+    alarm(1);
+    alarmed = 1;		/* Reset alarm to avoid race window */
+    signal(SIGALRM, sigalrm);	/* that can cause hanging in read() */
+
+    if ((flags = fcntl(0, F_GETFL, 0)) == -1)
+	fatal(2, "Can't get file mode flags on stdin: %m");
+
+    if (fcntl(0, F_SETFL, flags | O_NONBLOCK) == -1)
+	fatal(2, "Can't set file mode flags on stdin: %m");
+
+    if (verbose)
+	logf("alarm");
+}
+
+void unalarm()
+{
+    int flags;
+
+    if ((flags = fcntl(0, F_GETFL, 0)) == -1)
+	fatal(2, "Can't get file mode flags on stdin: %m");
+
+    if (fcntl(0, F_SETFL, flags & ~O_NONBLOCK) == -1)
+	fatal(2, "Can't set file mode flags on stdin: %m");
+}
+
+SIGTYPE sigint(signo)
+int signo;
+{
+    fatal(2, "SIGINT");
+}
+
+SIGTYPE sigterm(signo)
+int signo;
+{
+    fatal(2, "SIGTERM");
+}
+
+SIGTYPE sighup(signo)
+int signo;
+{
+    fatal(2, "SIGHUP");
+}
+
+void init()
+{
+    signal(SIGINT, sigint);
+    signal(SIGTERM, sigterm);
+    signal(SIGHUP, sighup);
+
+    set_tty_parameters();
+    signal(SIGALRM, sigalrm);
+    alarm(0);
+    alarmed = 0;
+}
+
+void set_tty_parameters()
+{
+#if defined(get_term_param)
+    term_parms t;
+
+    if (get_term_param (&t) < 0)
+	fatal(2, "Can't get terminal parameters: %m");
+
+    saved_tty_parameters = t;
+    have_tty_parameters  = 1;
+
+    t.c_iflag     |= IGNBRK | ISTRIP | IGNPAR;
+    t.c_oflag      = 0;
+    t.c_lflag      = 0;
+    t.c_cc[VERASE] =
+    t.c_cc[VKILL]  = 0;
+    t.c_cc[VMIN]   = 1;
+    t.c_cc[VTIME]  = 0;
+
+    if (set_term_param (&t) < 0)
+	fatal(2, "Can't set terminal parameters: %m");
+#endif
+}
+
+void break_sequence()
+{
+#ifdef TERMIOS
+    tcsendbreak (0, 0);
+#endif
+}
+
+void terminate(status)
+int status;
+{
+    static int terminating = 0;
+
+    if (terminating)
+	exit(status);
+    terminating = 1;
+    echo_stderr(-1);
+/*
+ * Allow the last of the report string to be gathered before we terminate.
+ */
+    if (report_gathering) {
+	int c, rep_len;
+
+	rep_len = strlen(report_buffer);
+	while (rep_len + 1 <= sizeof(report_buffer)) {
+	    alarm(1);
+	    c = get_char();
+	    alarm(0);
+	    if (c < 0 || iscntrl(c))
+		break;
+	    report_buffer[rep_len] = c;
+	    ++rep_len;
+	}
+	report_buffer[rep_len] = 0;
+	fprintf (report_fp, "chat:  %s\n", report_buffer);
+    }
+    if (report_file != (char *) 0 && report_fp != (FILE *) NULL) {
+	if (verbose)
+	    fprintf (report_fp, "Closing \"%s\".\n", report_file);
+	fclose (report_fp);
+	report_fp = (FILE *) NULL;
+    }
+
+#if defined(get_term_param)
+    if (have_tty_parameters) {
+	if (set_term_param (&saved_tty_parameters) < 0)
+	    fatal(2, "Can't restore terminal parameters: %m");
+    }
+#endif
+
+    exit(status);
+}
+
+/*
+ *	'Clean up' this string.
+ */
+char *clean(s, sending)
+register char *s;
+int sending;  /* set to 1 when sending (putting) this string. */
+{
+    char temp[STR_LEN], env_str[STR_LEN], cur_chr;
+    register char *s1, *phchar;
+    int add_return = sending;
+#define isoctal(chr)	(((chr) >= '0') && ((chr) <= '7'))
+#define isalnumx(chr)	((((chr) >= '0') && ((chr) <= '9')) \
+			 || (((chr) >= 'a') && ((chr) <= 'z')) \
+			 || (((chr) >= 'A') && ((chr) <= 'Z')) \
+			 || (chr) == '_')
+
+    s1 = temp;
+    while (*s) {
+	cur_chr = *s++;
+	if (cur_chr == '^') {
+	    cur_chr = *s++;
+	    if (cur_chr == '\0') {
+		*s1++ = '^';
+		break;
+	    }
+	    cur_chr &= 0x1F;
+	    if (cur_chr != 0) {
+		*s1++ = cur_chr;
+	    }
+	    continue;
+	}
+	
+	if (use_env && cur_chr == '$') {		/* ARI */
+	    phchar = env_str;
+	    while (isalnumx(*s))
+		*phchar++ = *s++;
+	    *phchar = '\0';
+	    phchar = getenv(env_str);
+	    if (phchar)
+		while (*phchar)
+		    *s1++ = *phchar++;
+	    continue;
+	}
+
+	if (cur_chr != '\\') {
+	    *s1++ = cur_chr;
+	    continue;
+	}
+
+	cur_chr = *s++;
+	if (cur_chr == '\0') {
+	    if (sending) {
+		*s1++ = '\\';
+		*s1++ = '\\';
+	    }
+	    break;
+	}
+
+	switch (cur_chr) {
+	case 'b':
+	    *s1++ = '\b';
+	    break;
+
+	case 'c':
+	    if (sending && *s == '\0')
+		add_return = 0;
+	    else
+		*s1++ = cur_chr;
+	    break;
+
+	case '\\':
+	case 'K':
+	case 'p':
+	case 'd':
+	    if (sending)
+		*s1++ = '\\';
+	    *s1++ = cur_chr;
+	    break;
+
+	case 'T':
+	    if (sending && phone_num) {
+		for (phchar = phone_num; *phchar != '\0'; phchar++) 
+		    *s1++ = *phchar;
+	    }
+	    else {
+		*s1++ = '\\';
+		*s1++ = 'T';
+	    }
+	    break;
+
+	case 'U':
+	    if (sending && phone_num2) {
+		for (phchar = phone_num2; *phchar != '\0'; phchar++) 
+		    *s1++ = *phchar;
+	    }
+	    else {
+		*s1++ = '\\';
+		*s1++ = 'U';
+	    }
+	    break;
+
+	case 'q':
+	    quiet = 1;
+	    break;
+
+	case 'r':
+	    *s1++ = '\r';
+	    break;
+
+	case 'n':
+	    *s1++ = '\n';
+	    break;
+
+	case 's':
+	    *s1++ = ' ';
+	    break;
+
+	case 't':
+	    *s1++ = '\t';
+	    break;
+
+	case 'N':
+	    if (sending) {
+		*s1++ = '\\';
+		*s1++ = '\0';
+	    }
+	    else
+		*s1++ = 'N';
+	    break;
+	    
+	case '$':			/* ARI */
+	    if (use_env) {
+		*s1++ = cur_chr;
+		break;
+	    }
+	    /* FALL THROUGH */
+
+	default:
+	    if (isoctal (cur_chr)) {
+		cur_chr &= 0x07;
+		if (isoctal (*s)) {
+		    cur_chr <<= 3;
+		    cur_chr |= *s++ - '0';
+		    if (isoctal (*s)) {
+			cur_chr <<= 3;
+			cur_chr |= *s++ - '0';
+		    }
+		}
+
+		if (cur_chr != 0 || sending) {
+		    if (sending && (cur_chr == '\\' || cur_chr == 0))
+			*s1++ = '\\';
+		    *s1++ = cur_chr;
+		}
+		break;
+	    }
+
+	    if (sending)
+		*s1++ = '\\';
+	    *s1++ = cur_chr;
+	    break;
+	}
+    }
+
+    if (add_return)
+	*s1++ = '\r';
+
+    *s1++ = '\0'; /* guarantee closure */
+    *s1++ = '\0'; /* terminate the string */
+    return dup_mem (temp, (size_t) (s1 - temp)); /* may have embedded nuls */
+}
+
+/*
+ * A modified version of 'strtok'. This version skips \ sequences.
+ */
+
+char *expect_strtok (s, term)
+     char *s, *term;
+{
+    static  char *str   = "";
+    int	    escape_flag = 0;
+    char   *result;
+
+/*
+ * If a string was specified then do initial processing.
+ */
+    if (s)
+	str = s;
+
+/*
+ * If this is the escape flag then reset it and ignore the character.
+ */
+    if (*str)
+	result = str;
+    else
+	result = (char *) 0;
+
+    while (*str) {
+	if (escape_flag) {
+	    escape_flag = 0;
+	    ++str;
+	    continue;
+	}
+
+	if (*str == '\\') {
+	    ++str;
+	    escape_flag = 1;
+	    continue;
+	}
+
+/*
+ * If this is not in the termination string, continue.
+ */
+	if (strchr (term, *str) == (char *) 0) {
+	    ++str;
+	    continue;
+	}
+
+/*
+ * This is the terminator. Mark the end of the string and stop.
+ */
+	*str++ = '\0';
+	break;
+    }
+    return (result);
+}
+
+/*
+ * Process the expect string
+ */
+
+void chat_expect (s)
+char *s;
+{
+    char *expect;
+    char *reply;
+
+    if (strcmp(s, "HANGUP") == 0) {
+	++hup_next;
+        return;
+    }
+ 
+    if (strcmp(s, "ABORT") == 0) {
+	++abort_next;
+	return;
+    }
+
+    if (strcmp(s, "CLR_ABORT") == 0) {
+	++clear_abort_next;
+	return;
+    }
+
+    if (strcmp(s, "REPORT") == 0) {
+	++report_next;
+	return;
+    }
+
+    if (strcmp(s, "CLR_REPORT") == 0) {
+	++clear_report_next;
+	return;
+    }
+
+    if (strcmp(s, "TIMEOUT") == 0) {
+	++timeout_next;
+	return;
+    }
+
+    if (strcmp(s, "ECHO") == 0) {
+	++echo_next;
+	return;
+    }
+
+    if (strcmp(s, "SAY") == 0) {
+	++say_next;
+	return;
+    }
+
+/*
+ * Fetch the expect and reply string.
+ */
+    for (;;) {
+	expect = expect_strtok (s, "-");
+	s      = (char *) 0;
+
+	if (expect == (char *) 0)
+	    return;
+
+	reply = expect_strtok (s, "-");
+
+/*
+ * Handle the expect string. If successful then exit.
+ */
+	if (get_string (expect))
+	    return;
+
+/*
+ * If there is a sub-reply string then send it. Otherwise any condition
+ * is terminal.
+ */
+	if (reply == (char *) 0 || exit_code != 3)
+	    break;
+
+	chat_send (reply);
+    }
+
+/*
+ * The expectation did not occur. This is terminal.
+ */
+    if (fail_reason)
+	logf("Failed (%s)", fail_reason);
+    else
+	logf("Failed");
+    terminate(exit_code);
+}
+
+/*
+ * Translate the input character to the appropriate string for printing
+ * the data.
+ */
+
+char *character(c)
+int c;
+{
+    static char string[10];
+    char *meta;
+
+    meta = (c & 0x80) ? "M-" : "";
+    c &= 0x7F;
+
+    if (c < 32)
+	sprintf(string, "%s^%c", meta, (int)c + '@');
+    else if (c == 127)
+	sprintf(string, "%s^?", meta);
+    else
+	sprintf(string, "%s%c", meta, c);
+
+    return (string);
+}
+
+/*
+ *  process the reply string
+ */
+void chat_send (s)
+register char *s;
+{
+    char file_data[STR_LEN];
+
+    if (say_next) {
+	say_next = 0;
+	s = clean(s, 1);
+	write(2, s, strlen(s));
+        free(s);
+	return;
+    }
+
+    if (hup_next) {
+        hup_next = 0;
+	if (strcmp(s, "OFF") == 0)
+           signal(SIGHUP, SIG_IGN);
+        else
+           signal(SIGHUP, sighup);
+        return;
+    }
+
+    if (echo_next) {
+	echo_next = 0;
+	echo = (strcmp(s, "ON") == 0);
+	return;
+    }
+
+    if (abort_next) {
+	char *s1;
+	
+	abort_next = 0;
+	
+	if (n_aborts >= MAX_ABORTS)
+	    fatal(2, "Too many ABORT strings");
+	
+	s1 = clean(s, 0);
+	
+	if (strlen(s1) > strlen(s)
+	    || strlen(s1) + 1 > sizeof(fail_buffer))
+	    fatal(1, "Illegal or too-long ABORT string ('%v')", s);
+
+	abort_string[n_aborts++] = s1;
+
+	if (verbose)
+	    logf("abort on (%v)", s);
+	return;
+    }
+
+    if (clear_abort_next) {
+	char *s1;
+	int   i;
+        int   old_max;
+	int   pack = 0;
+	
+	clear_abort_next = 0;
+	
+	s1 = clean(s, 0);
+	
+	if (strlen(s1) > strlen(s)
+	    || strlen(s1) + 1 > sizeof(fail_buffer))
+	    fatal(1, "Illegal or too-long CLR_ABORT string ('%v')", s);
+
+        old_max = n_aborts;
+	for (i=0; i < n_aborts; i++) {
+	    if ( strcmp(s1,abort_string[i]) == 0 ) {
+		free(abort_string[i]);
+		abort_string[i] = NULL;
+		pack++;
+		n_aborts--;
+		if (verbose)
+		    logf("clear abort on (%v)", s);
+	    }
+	}
+        free(s1);
+	if (pack)
+	    pack_array(abort_string,old_max);
+	return;
+    }
+
+    if (report_next) {
+	char *s1;
+	
+	report_next = 0;
+	if (n_reports >= MAX_REPORTS)
+	    fatal(2, "Too many REPORT strings");
+	
+	s1 = clean(s, 0);
+	
+	if (strlen(s1) > strlen(s) || strlen(s1) > sizeof fail_buffer - 1)
+	    fatal(1, "Illegal or too-long REPORT string ('%v')", s);
+	
+	report_string[n_reports++] = s1;
+	
+	if (verbose)
+	    logf("report (%v)", s);
+	return;
+    }
+
+    if (clear_report_next) {
+	char *s1;
+	int   i;
+	int   old_max;
+	int   pack = 0;
+	
+	clear_report_next = 0;
+	
+	s1 = clean(s, 0);
+	
+	if (strlen(s1) > strlen(s) || strlen(s1) > sizeof fail_buffer - 1)
+	    fatal(1, "Illegal or too-long REPORT string ('%v')", s);
+
+	old_max = n_reports;
+	for (i=0; i < n_reports; i++) {
+	    if ( strcmp(s1,report_string[i]) == 0 ) {
+		free(report_string[i]);
+		report_string[i] = NULL;
+		pack++;
+		n_reports--;
+		if (verbose)
+		    logf("clear report (%v)", s);
+	    }
+	}
+        free(s1);
+        if (pack)
+	    pack_array(report_string,old_max);
+	
+	return;
+    }
+
+    if (timeout_next) {
+	timeout_next = 0;
+	timeout = atoi(s);
+	
+	if (timeout <= 0)
+	    timeout = DEFAULT_CHAT_TIMEOUT;
+
+	if (verbose)
+	    logf("timeout set to %d seconds", timeout);
+
+	return;
+    }
+
+    /*
+     * The syntax @filename means read the string to send from the
+     * file `filename'.
+     */
+    if (s[0] == '@') {
+	/* skip the @ and any following white-space */
+	char *fn = s;
+	while (*++fn == ' ' || *fn == '\t')
+	    ;
+
+	if (*fn != 0) {
+	    FILE *f;
+	    int n = 0;
+
+	    /* open the file and read until STR_LEN-1 bytes or end-of-file */
+	    f = fopen(fn, "r");
+	    if (f == NULL)
+		fatal(1, "%s -- open failed: %m", fn);
+	    while (n < STR_LEN - 1) {
+		int nr = fread(&file_data[n], 1, STR_LEN - 1 - n, f);
+		if (nr < 0)
+		    fatal(1, "%s -- read error", fn);
+		if (nr == 0)
+		    break;
+		n += nr;
+	    }
+	    fclose(f);
+
+	    /* use the string we got as the string to send,
+	       but trim off the final newline if any. */
+	    if (n > 0 && file_data[n-1] == '\n')
+		--n;
+	    file_data[n] = 0;
+	    s = file_data;
+	}
+    }
+
+    if (strcmp(s, "EOT") == 0)
+	s = "^D\\c";
+    else if (strcmp(s, "BREAK") == 0)
+	s = "\\K\\c";
+
+    if (!put_string(s))
+	fatal(1, "Failed");
+}
+
+int get_char()
+{
+    int status;
+    char c;
+
+    status = read(0, &c, 1);
+
+    switch (status) {
+    case 1:
+	return ((int)c & 0x7F);
+
+    default:
+	logf("warning: read() on stdin returned %d", status);
+
+    case -1:
+	if ((status = fcntl(0, F_GETFL, 0)) == -1)
+	    fatal(2, "Can't get file mode flags on stdin: %m");
+
+	if (fcntl(0, F_SETFL, status & ~O_NONBLOCK) == -1)
+	    fatal(2, "Can't set file mode flags on stdin: %m");
+	
+	return (-1);
+    }
+}
+
+int put_char(c)
+int c;
+{
+    int status;
+    char ch = c;
+
+    usleep(10000);		/* inter-character typing delay (?) */
+
+    status = write(1, &ch, 1);
+
+    switch (status) {
+    case 1:
+	return (0);
+	
+    default:
+	logf("warning: write() on stdout returned %d", status);
+	
+    case -1:
+	if ((status = fcntl(0, F_GETFL, 0)) == -1)
+	    fatal(2, "Can't get file mode flags on stdin, %m");
+
+	if (fcntl(0, F_SETFL, status & ~O_NONBLOCK) == -1)
+	    fatal(2, "Can't set file mode flags on stdin: %m");
+	
+	return (-1);
+    }
+}
+
+int write_char (c)
+int c;
+{
+    if (alarmed || put_char(c) < 0) {
+	alarm(0);
+	alarmed = 0;
+
+	if (verbose) {
+	    if (errno == EINTR || errno == EWOULDBLOCK)
+		logf(" -- write timed out");
+	    else
+		logf(" -- write failed: %m");
+	}
+	return (0);
+    }
+    return (1);
+}
+
+int put_string (s)
+register char *s;
+{
+    quiet = 0;
+    s = clean(s, 1);
+
+    if (verbose) {
+	if (quiet)
+	    logf("send (??????)");
+	else
+	    logf("send (%v)", s);
+    }
+
+    alarm(timeout); alarmed = 0;
+
+    while (*s) {
+	register char c = *s++;
+
+	if (c != '\\') {
+	    if (!write_char (c))
+		return 0;
+	    continue;
+	}
+
+	c = *s++;
+	switch (c) {
+	case 'd':
+	    sleep(1);
+	    break;
+
+	case 'K':
+	    break_sequence();
+	    break;
+
+	case 'p':
+	    usleep(10000); 	/* 1/100th of a second (arg is microseconds) */
+	    break;
+
+	default:
+	    if (!write_char (c))
+		return 0;
+	    break;
+	}
+    }
+
+    alarm(0);
+    alarmed = 0;
+    return (1);
+}
+
+/*
+ *	Echo a character to stderr.
+ *	When called with -1, a '\n' character is generated when
+ *	the cursor is not at the beginning of a line.
+ */
+void echo_stderr(n)
+int n;
+{
+    static int need_lf;
+    char *s;
+
+    switch (n) {
+    case '\r':		/* ignore '\r' */
+	break;
+    case -1:
+	if (need_lf == 0)
+	    break;
+	/* fall through */
+    case '\n':
+	write(2, "\n", 1);
+	need_lf = 0;
+	break;
+    default:
+	s = character(n);
+	write(2, s, strlen(s));
+	need_lf = 1;
+	break;
+    }
+}
+
+/*
+ *	'Wait for' this string to appear on this file descriptor.
+ */
+int get_string(string)
+register char *string;
+{
+    char temp[STR_LEN];
+    int c, printed = 0, len, minlen;
+    register char *s = temp, *end = s + STR_LEN;
+    char *logged = temp;
+
+    fail_reason = (char *)0;
+    string = clean(string, 0);
+    len = strlen(string);
+    minlen = (len > sizeof(fail_buffer)? len: sizeof(fail_buffer)) - 1;
+
+    if (verbose)
+	logf("expect (%v)", string);
+
+    if (len > STR_LEN) {
+	logf("expect string is too long");
+	exit_code = 1;
+	return 0;
+    }
+
+    if (len == 0) {
+	if (verbose)
+	    logf("got it");
+	return (1);
+    }
+
+    alarm(timeout);
+    alarmed = 0;
+
+    while ( ! alarmed && (c = get_char()) >= 0) {
+	int n, abort_len, report_len;
+
+	if (echo)
+	    echo_stderr(c);
+	if (verbose && c == '\n') {
+	    if (s == logged)
+		logf("");	/* blank line */
+	    else
+		logf("%0.*v", s - logged, logged);
+	    logged = s + 1;
+	}
+
+	*s++ = c;
+
+	if (verbose && s >= logged + 80) {
+	    logf("%0.*v", s - logged, logged);
+	    logged = s;
+	}
+
+	if (Verbose) {
+	   if (c == '\n')
+	       fputc( '\n', stderr );
+	   else if (c != '\r')
+	       fprintf( stderr, "%s", character(c) );
+	}
+
+	if (!report_gathering) {
+	    for (n = 0; n < n_reports; ++n) {
+		if ((report_string[n] != (char*) NULL) &&
+		    s - temp >= (report_len = strlen(report_string[n])) &&
+		    strncmp(s - report_len, report_string[n], report_len) == 0) {
+		    time_t time_now   = time ((time_t*) NULL);
+		    struct tm* tm_now = localtime (&time_now);
+
+		    strftime (report_buffer, 20, "%b %d %H:%M:%S ", tm_now);
+		    strcat (report_buffer, report_string[n]);
+
+		    report_string[n] = (char *) NULL;
+		    report_gathering = 1;
+		    break;
+		}
+	    }
+	}
+	else {
+	    if (!iscntrl (c)) {
+		int rep_len = strlen (report_buffer);
+		report_buffer[rep_len]     = c;
+		report_buffer[rep_len + 1] = '\0';
+	    }
+	    else {
+		report_gathering = 0;
+		fprintf (report_fp, "chat:  %s\n", report_buffer);
+	    }
+	}
+
+	if (s - temp >= len &&
+	    c == string[len - 1] &&
+	    strncmp(s - len, string, len) == 0) {
+	    if (verbose) {
+		if (s > logged)
+		    logf("%0.*v", s - logged, logged);
+		logf(" -- got it\n");
+	    }
+
+	    alarm(0);
+	    alarmed = 0;
+	    return (1);
+	}
+
+	for (n = 0; n < n_aborts; ++n) {
+	    if (s - temp >= (abort_len = strlen(abort_string[n])) &&
+		strncmp(s - abort_len, abort_string[n], abort_len) == 0) {
+		if (verbose) {
+		    if (s > logged)
+			logf("%0.*v", s - logged, logged);
+		    logf(" -- failed");
+		}
+
+		alarm(0);
+		alarmed = 0;
+		exit_code = n + 4;
+		strcpy(fail_reason = fail_buffer, abort_string[n]);
+		return (0);
+	    }
+	}
+
+	if (s >= end) {
+	    if (logged < s - minlen) {
+		if (verbose)
+		    logf("%0.*v", s - logged, logged);
+		logged = s;
+	    }
+	    s -= minlen;
+	    memmove(temp, s, minlen);
+	    logged = temp + (logged - s);
+	    s = temp + minlen;
+	}
+
+	if (alarmed && verbose)
+	    logf("warning: alarm synchronization problem");
+    }
+
+    alarm(0);
+    
+    if (verbose && printed) {
+	if (alarmed)
+	    logf(" -- read timed out");
+	else
+	    logf(" -- read failed: %m");
+    }
+
+    exit_code = 3;
+    alarmed   = 0;
+    return (0);
+}
+
+/*
+ * Gross kludge to handle Solaris versions >= 2.6 having usleep.
+ */
+#ifdef SOL2
+#include <sys/param.h>
+#if MAXUID > 65536		/* then this is Solaris 2.6 or later */
+#undef NO_USLEEP
+#endif
+#endif /* SOL2 */
+
+#ifdef NO_USLEEP
+#include <sys/types.h>
+#include <sys/time.h>
+
+/*
+  usleep -- support routine for 4.2BSD system call emulations
+  last edit:  29-Oct-1984     D A Gwyn
+  */
+
+extern int	  select();
+
+int
+usleep( usec )				  /* returns 0 if ok, else -1 */
+    long		usec;		/* delay in microseconds */
+{
+    static struct {		/* `timeval' */
+	long	tv_sec;		/* seconds */
+	long	tv_usec;	/* microsecs */
+    } delay;	    		/* _select() timeout */
+
+    delay.tv_sec  = usec / 1000000L;
+    delay.tv_usec = usec % 1000000L;
+
+    return select(0, (long *)0, (long *)0, (long *)0, &delay);
+}
+#endif
+
+void
+pack_array (array, end)
+    char **array; /* The address of the array of string pointers */
+    int    end;   /* The index of the next free entry before CLR_ */
+{
+    int i, j;
+
+    for (i = 0; i < end; i++) {
+	if (array[i] == NULL) {
+	    for (j = i+1; j < end; ++j)
+		if (array[j] != NULL)
+		    array[i++] = array[j];
+	    for (; i < end; ++i)
+		array[i] = NULL;
+	    break;
+	}
+    }
+}
+
+/*
+ * vfmtmsg - format a message into a buffer.  Like vsprintf except we
+ * also specify the length of the output buffer, and we handle the
+ * %m (error message) format.
+ * Doesn't do floating-point formats.
+ * Returns the number of chars put into buf.
+ */
+#define OUTCHAR(c)	(buflen > 0? (--buflen, *buf++ = (c)): 0)
+
+int
+vfmtmsg(buf, buflen, fmt, args)
+    char *buf;
+    int buflen;
+    const char *fmt;
+    va_list args;
+{
+    int c, i, n;
+    int width, prec, fillch;
+    int base, len, neg, quoted;
+    unsigned long val = 0;
+    char *str, *buf0;
+    const char *f;
+    unsigned char *p;
+    char num[32];
+    static char hexchars[] = "0123456789abcdef";
+
+    buf0 = buf;
+    --buflen;
+    while (buflen > 0) {
+	for (f = fmt; *f != '%' && *f != 0; ++f)
+	    ;
+	if (f > fmt) {
+	    len = f - fmt;
+	    if (len > buflen)
+		len = buflen;
+	    memcpy(buf, fmt, len);
+	    buf += len;
+	    buflen -= len;
+	    fmt = f;
+	}
+	if (*fmt == 0)
+	    break;
+	c = *++fmt;
+	width = prec = 0;
+	fillch = ' ';
+	if (c == '0') {
+	    fillch = '0';
+	    c = *++fmt;
+	}
+	if (c == '*') {
+	    width = va_arg(args, int);
+	    c = *++fmt;
+	} else {
+	    while (isdigit(c)) {
+		width = width * 10 + c - '0';
+		c = *++fmt;
+	    }
+	}
+	if (c == '.') {
+	    c = *++fmt;
+	    if (c == '*') {
+		prec = va_arg(args, int);
+		c = *++fmt;
+	    } else {
+		while (isdigit(c)) {
+		    prec = prec * 10 + c - '0';
+		    c = *++fmt;
+		}
+	    }
+	}
+	str = 0;
+	base = 0;
+	neg = 0;
+	++fmt;
+	switch (c) {
+	case 'd':
+	    i = va_arg(args, int);
+	    if (i < 0) {
+		neg = 1;
+		val = -i;
+	    } else
+		val = i;
+	    base = 10;
+	    break;
+	case 'o':
+	    val = va_arg(args, unsigned int);
+	    base = 8;
+	    break;
+	case 'x':
+	    val = va_arg(args, unsigned int);
+	    base = 16;
+	    break;
+	case 'p':
+	    val = (unsigned long) va_arg(args, void *);
+	    base = 16;
+	    neg = 2;
+	    break;
+	case 's':
+	    str = va_arg(args, char *);
+	    break;
+	case 'c':
+	    num[0] = va_arg(args, int);
+	    num[1] = 0;
+	    str = num;
+	    break;
+	case 'm':
+	    str = strerror(errno);
+	    break;
+	case 'v':		/* "visible" string */
+	case 'q':		/* quoted string */
+	    quoted = c == 'q';
+	    p = va_arg(args, unsigned char *);
+	    if (fillch == '0' && prec > 0) {
+		n = prec;
+	    } else {
+		n = strlen((char *)p);
+		if (prec > 0 && prec < n)
+		    n = prec;
+	    }
+	    while (n > 0 && buflen > 0) {
+		c = *p++;
+		--n;
+		if (!quoted && c >= 0x80) {
+		    OUTCHAR('M');
+		    OUTCHAR('-');
+		    c -= 0x80;
+		}
+		if (quoted && (c == '"' || c == '\\'))
+		    OUTCHAR('\\');
+		if (c < 0x20 || (0x7f <= c && c < 0xa0)) {
+		    if (quoted) {
+			OUTCHAR('\\');
+			switch (c) {
+			case '\t':	OUTCHAR('t');	break;
+			case '\n':	OUTCHAR('n');	break;
+			case '\b':	OUTCHAR('b');	break;
+			case '\f':	OUTCHAR('f');	break;
+			default:
+			    OUTCHAR('x');
+			    OUTCHAR(hexchars[c >> 4]);
+			    OUTCHAR(hexchars[c & 0xf]);
+			}
+		    } else {
+			if (c == '\t')
+			    OUTCHAR(c);
+			else {
+			    OUTCHAR('^');
+			    OUTCHAR(c ^ 0x40);
+			}
+		    }
+		} else
+		    OUTCHAR(c);
+	    }
+	    continue;
+	default:
+	    *buf++ = '%';
+	    if (c != '%')
+		--fmt;		/* so %z outputs %z etc. */
+	    --buflen;
+	    continue;
+	}
+	if (base != 0) {
+	    str = num + sizeof(num);
+	    *--str = 0;
+	    while (str > num + neg) {
+		*--str = hexchars[val % base];
+		val = val / base;
+		if (--prec <= 0 && val == 0)
+		    break;
+	    }
+	    switch (neg) {
+	    case 1:
+		*--str = '-';
+		break;
+	    case 2:
+		*--str = 'x';
+		*--str = '0';
+		break;
+	    }
+	    len = num + sizeof(num) - 1 - str;
+	} else {
+	    len = strlen(str);
+	    if (prec > 0 && len > prec)
+		len = prec;
+	}
+	if (width > 0) {
+	    if (width > buflen)
+		width = buflen;
+	    if ((n = width - len) > 0) {
+		buflen -= n;
+		for (; n > 0; --n)
+		    *buf++ = fillch;
+	    }
+	}
+	if (len > buflen)
+	    len = buflen;
+	memcpy(buf, str, len);
+	buf += len;
+	buflen -= len;
+    }
+    *buf = 0;
+    return buf - buf0;
+}