#!/bin/sh
# Original script Copyright (c), 1995 by Mike Jagdis
# Modifications, Copyright (c), 1995 by Eric Schenk
# Further modifications, Copyright (c), 1996 by Bruce Toback
#
# This script was originally submitted by Mike Jagdis
# <jaggy@purplet.demon.co.uk> along with patches to diald to
# allow a simple external command interface to diald.
# I expanded the command interface into the fifo option for diald,
# and the mucked with Mike's script to make it work with my
# fifo implementation as opposed to his original one.
# 
# This script is intended to be used to have diald rendezvous with
# an incoming PPP or SLIP call.
# If the script is being run by the user "foo" it assumes that the
# diald you want to rendezvous with has been run with the
# option "fifo /etc/diald/foo".
# Note that the user foo must have permission to write to /etc/diald/foo
# and diald must have permission to read /etc/diald/foo.
# I suggest the following scheme.
# Create a group "diald" and add root to the group. Run diald from
# /etc/rc* as usual.
# Create the necessary FIFO's ahead of time with mkfifo.
# The owner of each FIFO should be the user that will write
# to it, and the group owner of each fifo should be "diald".
# Each fifo should be set to permission mode "0240".
# This script can now be run as the login shell of the user
# who is rendezvousing with diald.

DIALDDIR=/etc/diald

if [ -n "${LOGNAME}" ]; then
	user="${LOGNAME}"
else
	user=`whoami`
fi
tty=`tty`

if [ -n "${user}" -a -n "${tty}" -a -p "${DIALDDIR}/${user}" ]; then
	echo "connect $$ ${tty}" > "${DIALDDIR}/${user}"

        # The next line is used to alert the dialin caller that we're about
        # to go into SLIP mode; it's a positive acknowedgement that the
        # login was successful. Change or remove as needed to suit
        # the dialin user.

        echo SLIP

	# It's this process that holds the lock on the serial line not
	# whatever diald is doing so we have to wait around until diald
	# kills us.
	while true
	do
		sleep 36000
	done
else
	# diald may not be running?
	pppd passive
fi