#!/bin/sh
######################################################################
#
# Determine the device to be terminated.
#
if [ $# -eq 0 ]; then
    DEVICE=$(netstat -rn | grep '^0\.0\.0\.0' | sed -e 's/^.* //')
    if [ x$DEVICE = x ]; then
        exit
    fi
else
    DEVICE=$1
fi

######################################################################
#
# If the ppp0 pid file is present then the program is running. Stop it.
if [ -r /var/run/$DEVICE.pid ]; then
    kill -INT $(cat /var/run/$DEVICE.pid)
#
# If the kill did not work then there is no process running for this
# pid. It may also mean that the lock file will be left. You may wish
# to delete the lock file at the same time.
    if [ ! "$?" = "0" ]; then
	rm -f /var/run/$DEVICE.pid
	echo "ERROR: Removed stale pid file"
	exit 1
    fi
#
# Success. Let pppd clean up its own junk.
    echo "PPP link to $DEVICE terminated."
    exit 0
fi
#
# The ppp process is not running for ppp0
echo "ERROR: PPP link is not active on $DEVICE"
exit 1
.