#!/bin/sh

PROGNAME=ping903
COMMAND=/usr/sbin/ping903
OPTIONS=
CONFIG=/etc/ping903.conf

if [ ! -f $CONFIG ]; then
    exit
fi

PIDFILE=$(sed -r -n 's/^[[:space:]]*pidfile[[:space:]]+//p' $CONFIG)

ping903_start() {
    $COMMAND $OPTIONS
}

ping903_stop() {
    if [ -n "$PIDFILE" ]; then
	if [ -f "$PIDFILE" ]; then
	    pid=$(head -1 $PIDFILE)
	    prog=$(ps -p $pid -ocomm=)
	    if [ $prog = $PROGNAME ]; then
		kill -TERM $pid
		return
	    fi
        else
	    return
	fi
    fi

    killall $PROGNAME
}

ping903_restart() {
    ping903_stop
    sleep 1
    ping903_start
}

ping903_status() {
    if [ -n "$PIDFILE" ]; then
	if [ -f "$PIDFILE" ]; then
	    pid=$(head -1 $PIDFILE)
	    prog=$(ps -p $pid -ocomm=)
	    if [ $prog = $PROGNAME ]; then
		echo "$PROGNAME is running (PID $pid)"
	    else
		echo "$PROGNAME is not running (pidfile is stale)"
	    fi
	else
	    echo "$PROGNAME is not running"
	fi
    else
	pid=$(/sbin/pidof $PROGNAME | cut -d ' ' -f 1)
	if [ -n "$pid" ]; then
	    echo "$PROGNAME is running (PID $pid)"
	else
	    echo "$PROGNAME is not running"
        fi
    fi
}

case "$1" in
    'start')
	ping903_start
        ;;
    'stop')
	ping903_stop
	;;
    'restart')
	ping903_restart
	;;
    'status')
	ping903_status
	;;
    *)
	echo "usage $0 start|stop|restart|status"
esac