197 lines
5.3 KiB
Bash
Executable File
197 lines
5.3 KiB
Bash
Executable File
#! /bin/sh
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# $Revision: 1.2 $
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# 'Fix' a MultiTech modem
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# This script writes a configuration suitable for operation with IRIX
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# into the non-volatile memory in the modem.
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# -i for inbound use only
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# -o for outbound use only
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# -io for both
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# -m model to specify the model number, as in "-m DP14.4"
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# -v for verbose debugging
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# -c cmd to add the string of Hayes-like commands, "cmd",
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# to the end of string of initializations.
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# This script must be run by "root".
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# When this script is run, it sends the responses of the modem to
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# standard out. It ends by telling the modem to display all
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# of its parameters. If you do not see the right results,
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# first check the cable to the modem.
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# This script uses 'ttyd*' device names, so that it is not stopped by a
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# need for DCD. Since there is often a getty(1M) running on
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# a 'ttyf*', and since you cannot simultaneously open 'ttyf' and
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# 'ttyd', it is necessary to stop the getty in /etc/inittab
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# before using this script. If a uugetty(1M) is running on the
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# port, it need not be turned off, because this script will
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# temporarily disable it.
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# Additional local commands should be added to this file in the following
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# line or provided with the -c option
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loc=""
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# With a Multitech ZDX
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# use a line in /etc/inittab that runs /usr/lib/uucp/uugetty with arguments
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# such as the following:
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# -Nt60 -izdxin,conn ttyf2 dx_38400
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# See `man uugetty` and `man inittab`.
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USAGE="usage: `basename $0`: -i|-o|-io [-m model] [-v] [-c cmd] portno"
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while getopts "viom:c:s:" c; do
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case $c in
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i) in=1;;
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o) out=1;;
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v) if test ! -z "$verbose"; then
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set -v
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fi
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set -x
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verbose="-v"
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;;
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m) model=`echo "$OPTARG" | tr '[a-z]' '[A-Z]'`;;
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c) loc="$loc $OPTARG";;
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s) speed="$OPTARG";;
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\?) echo "$USAGE"; exit 1;;
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esac
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done
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shift `expr $OPTIND - 1`
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if test $# != 1 ; then
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echo "$USAGE"
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exit 1
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fi
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case $1 in
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[dmf]*) port=`expr $1 : '.\(.*\)'`;;
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*) port=$1;;
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esac
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dev=/dev/ttyd$port
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odevs="/dev/ttym$port /dev/ttyf$port"
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if test ! -c "$dev"; then
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echo "bad port number: $1"
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exit 1
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fi
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if test ! -d /var/spool/locks -a -d /usr/spool/locks; then
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LOCKDIR=/usr/spool/locks
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else
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LOCKDIR=/var/spool/locks
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fi
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LOCKD=$LOCKDIR/LCK..ttyd$port
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LOCKM=$LOCKDIR/LCK..ttym$port
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LOCKF=$LOCKDIR/LCK..ttyf$port
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# uucp wants a 10 byte string
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LOCKSTR=`expr " $$" : '.*\(..........\)'`
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LOGFILE=/tmp/fix-modem$$
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# use factory defaults, except or including:
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# &D3=reset on DTR false
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# &E11 &E13=CTS flow control
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# %E0=no escapes
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# $F0=stick to v.42
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# &SF1 &S0 %CD1=DSR true (&SF1 must precede &S0)
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# X4=extended result codes
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# S0=1 answer the phone on 1st ring, =0 do not answer the phone
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# s13=128 disable remote escapes
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# S36=0 go on-hook when told to
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# S37=0 go off-hook when told to
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# &B1 to reduce the transmit buffer size might help SLIP and PPP
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# interactive response.
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# for now, assume all models are the same
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case "${model:=ZDX}" in
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ZDX)
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rstcmd='&F0'
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varcmd1='&D3 &E11 &E13 %E1 $F0 &SF1 &S0 %CD1 X4'
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varcmd2='S13=128 S36=0 S37=0'
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infocmd='L5 L6 L7'
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;;
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*) echo "unknown model: $model"; exit 1;;
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esac
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# Set S0=1 to answer the phone for pure input.
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# Do not answer the phone (S0=0) for pure output.
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# Do not answer the phone by default (S0=0) for combined
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# input & output, because uugetty will answer it.
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if test "$in$out" = ""; then
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in=1; out=1; # assume -io if nothing said
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fi
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if test "$out" = 1; then
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modecmd='S0=0'
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elif test "$in" = 1; then
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modecmd='S0=1'
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else
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echo "$USAGE" # complain if neither in nor out is set
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exit 1
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fi
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if test ! -w /dev; then
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echo "This does not work very well except for the superuser."
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exit 1
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fi
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# fight the UUCP daemons and others for the port
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/etc/renice -20 $$ > /dev/null
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echo
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echo " If this effort to program the AT&T \"$model\"" connected to port $port
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echo " works, you should see a series AT commands and responses."
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echo " The response to each command should end with 'OK'."
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echo " The last command should be followed by a list of all of the settings."
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# lock the device by all of its names
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rm -f $LOCKD $LOCKM $LOCKF
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echo "$LOCKSTR" > $LOCKD; ln $LOCKD $LOCKM; ln $LOCKD $LOCKF
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# zap any gettys or other users
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pids=`/etc/fuser -q $dev $odevs 2>/dev/null`
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if test ! -z "$pids"; then
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echo " Stopping processes currently using port $port\n"
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if test ! -z "$verbose"; then
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ps -lfp $pids
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fi
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kill -1 $pids
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sleep 2
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fi
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pids="$pids `/etc/fuser -qk $dev $odevs 2>/dev/null`"
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# re-lock in case the other guy removed our rude lock files
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rm -f $LOCKD $LOCKM $LOCKF
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echo "$LOCKSTR" > $LOCKD; ln $LOCKD $LOCKM; ln $LOCKD $LOCKF
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trap "rm -f $LOCKD $LOCKM $LOCKF $LOGFILE; /etc/fuser -qk $dev $odevs 2>/dev/null; exit 1" 0 1 2 15
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# start listening to the modem, after waiting for previous users to
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# disappear and allow us to open the ttyd* device.
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# Also keep DTR low in the hope of resetting the modem.
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while test ! -z "$pids"; do
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pids=`/etc/fuser -qk $dev $odevs 2>/dev/null`
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sleep 2
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done
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rm -f $LOGFILE
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tee $LOGFILE <$dev &
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stty $speed -echo -icrnl -ixon -ixoff -isig clocal < $dev
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# Reset things.
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echo "AT $rstcmd\r\c" > $dev; sleep 1
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echo "AT Q0 $varcmd1" > $dev; sleep 1
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echo "AT Q0 $varcmd2 $modecmd $loc\r\c" > $dev; sleep 1
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echo "AT &W0\r\c" > $dev; sleep 2
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echo "AT $infocmd\r\c" > $dev; sleep 1
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#prevent message about the death of the listener
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exec >/dev/null 2>&1
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