#! /bin/sh
# Base on:	$Revision: 1.7 $

# THIS IS AN UNSUPPORTED SCRIPT PROVIDED 'AS-IS' ONLY!!!

# Installation instructions:
#	1. Download and save this file.
#	2. As root, copy this file to:	/etc/uucp/fix-cardinal
#	3. Change file permissions to:	chmod 755 /etc/uucp/fix-cardinal

# 'Fix' a MultiTech modem

#    This script writes a configuration suitable for operation with IRIX
#    into the non-volatile memory in the modem.

#	-i	for inbound use only
#	-o	for outbound use only
#	-io	for both
#	-m model to specify the model number, as in "-m DP14.4"
#	-v	for verbose debugging
#	-c cmd	to add the string of Hayes-like commands, "cmd",
#		    to the end of string of initializations.

# This script must be run by "root".

#You may also want to add "ATM3" which sets the speaker ON during dialing, but
#OFF during DCE connect handshake...The new Multitec 28.8 has NO volume knob and
#a VERY loud and annoying speaker output!

# When this script is run, it sends the responses of the modem to
#	standard out.  It ends by telling the modem to display all
#	of its parameters.  If you do not see the right results,
#	first check the cable to the modem.

# This script uses 'ttyd*' device names, so that it is not stopped by a
#	need for DCD.  Since there is often a getty(1M) running on
#	a 'ttyf*', and since you cannot simultaneously open 'ttyf' and
#	'ttyd', it is necessary to stop the getty in /etc/inittab
#	before using this script.  If a uugetty(1M) is running on the
#	port, it need not be turned off, because this script will
#	temporarily disable it.


# Additional local commands should be added to this file in the following
#	line or provided with the -c option
loc=""


# Use a line in /etc/inittab like the following with a ZDX
#t5:23:respawn:/usr/lib/uucp/uugetty -Nt60 -izdxin,conn ttyf5 dx_38400
#port 5


USAGE="usage: `basename $0`: -i|-o|-io [-m model] [-v] [-c cmd] portno"


while getopts "viom:c:s:" c; do
    case $c in
    i) in=1;;
    o) out=1;;
    v) if test ! -z "$verbose"; then
	    set -v
	fi
	set -x
	verbose="-v"
	;;
    m) model=`echo "$OPTARG" | tr '[a-z]' '[A-Z]'`;;
    c) loc="$loc $OPTARG";;
    s) speed="$OPTARG";;
    \?) echo "$USAGE"; exit 1;;
    esac
done
shift `expr $OPTIND - 1`
if test $# != 1 ; then
    echo "$USAGE"
    exit 1
fi

case $1 in
    [dmf]*) port=`expr $1 : '.\(.*\)'`;;
    *) port=$1;;
esac
dev=/dev/ttyd$port
odevs="/dev/ttym$port /dev/ttyf$port"
if test ! -c "$dev"; then
    echo "bad port number: $1"
    exit 1
fi
if test ! -d /var/spool/locks -a -d /usr/spool/locks; then
    LOCKDIR=/usr/spool/locks
else
    LOCKDIR=/var/spool/locks
fi
LOCKD=$LOCKDIR/LCK..ttyd$port
LOCKM=$LOCKDIR/LCK..ttym$port
LOCKF=$LOCKDIR/LCK..ttyf$port
# uucp wants a 10 byte string
LOCKSTR=`expr "         $$" : '.*\(..........\)'`

LOGFILE=/tmp/fix-modem$$


# use factory defaults, except or including:
#	&D3=reset on DTR false
#	&E11 &E13=CTS flow control
#	%E0=no escapes
#	$F0=stick to v.42
#	&SF1 &S0 %CD1=DSR true (&SF1 must precede &S0)
#	X4=extended result codes
#	S0=1 answer the phone on 1st ring, =0 do not answer the phone
#	s13=128 disable remote escapes
#	S36=0 go on-hook when told to
#	S37=0 go off-hook when told to

# &B1 to reduce the transmit buffer size might help SLIP and PPP
# interactive response.

# for now, assume all models are the same
case "${model:=ZDX}" in
     ZDX)
	rstcmd='&F0'
	varcmd1='&D3 &E11 &E13 %E1 $F0 &SF1 &S0 %CD1 X4'
	varcmd2='S13=128 S36=0 S37=0'
	infocmd='L5 L6 L7'
	;;
     *) echo "unknown model: $model"; exit 1;;
esac

# Set S0=1 to answer the phone for pure input.
#	Do not answer the phone (S0=0) for pure output.
#	Do not answer the phone by default (S0=0) for combined
#		input & output, because uugetty will answer it.
if test "$in$out" = ""; then
    in=1; out=1;		# assume -io if nothing said
fi
if test "$out" = 1; then
    modecmd='S0=0'
elif test "$in" = 1; then
    modecmd='S0=1'
else
    echo "$USAGE"		# complain if neither in nor out is set
    exit 1
fi


if test ! -w /dev; then
    echo "This does not work very well except for the superuser."
    exit 1
fi

# fight the UUCP daemons and others for the port
/etc/renice -20 $$ > /dev/null


echo
echo "  If this effort to program the AT&T \"$model\"" connected to port
$port
echo "  works, you should see a series AT commands and responses."
echo "  The response to each command should end with 'OK'."
echo "  The last command should be followed by a list of all of the
settings."

# lock the device by all of its names
rm -f $LOCKD $LOCKM $LOCKF
echo "$LOCKSTR" > $LOCKD; ln $LOCKD $LOCKM; ln $LOCKD $LOCKF

# zap any gettys or other users
pids=`/etc/fuser -q $dev $odevs 2>/dev/null`
if test ! -z "$pids"; then
    echo "    Stopping processes currently using port $port\n"
    if test ! -z "$verbose"; then
	ps -lfp $pids
    fi
    kill -1 $pids
    sleep 2
fi
pids="$pids `/etc/fuser -qk $dev $odevs 2>/dev/null`"
# re-lock in case the other guy removed our rude lock files
rm -f $LOCKD $LOCKM $LOCKF
echo "$LOCKSTR" > $LOCKD; ln $LOCKD $LOCKM; ln $LOCKD $LOCKF

trap "rm -f $LOCKD $LOCKM $LOCKF $LOGFILE; /etc/fuser -qk $dev $odevs
2>/dev/null; exit 1" 0 1 2 15

# start listening to the modem, after waiting for previous users to
# disappear and allow us to open the ttyd* device.
# Also keep DTR low in the hope of resetting the modem.
while test ! -z "$pids"; do
    pids=`/etc/fuser -qk $dev $odevs 2>/dev/null`
    sleep 2
done

rm -f $LOGFILE
tee $LOGFILE <$dev &

stty $speed -echo -icrnl -ixon -ixoff -isig clocal < $dev

# Reset things.
echo "AT $rstcmd\r\c" > $dev; sleep 1

echo "AT Q0 $varcmd1" > $dev; sleep 1
echo "AT Q0 $varcmd2 $modecmd $loc\r\c" > $dev; sleep 1

echo "AT &W0\r\c" > $dev; sleep 2

echo "AT $infocmd\r\c" > $dev; sleep 1

#prevent message about the death of the listener
exec >/dev/null 2>&1