#!/bin/sh
#
### BEGIN INIT INFO
# Provides: dhcrelay
# Default-Start:
# Default-Stop:
# Should-Start:
# Required-Start: $network
# Required-Stop:
# Short-Description: Start and stop the DHCP relay server
# Description: dhcrelay provides the Dynamic Host Configuration Protocol (DHCP)
#              relay server.  This is required when your DHCP server is on
#              another network segment from the clients.
### END INIT INFO
#
# The fields below are left around for legacy tools (will remove later).
#
# chkconfig: - 65 35
# description: dhcrelay provides a relay for Dynamic Host Control Protocol.
# processname: dhcrelay
# # pidfile: /var/run/dhcrelay.pid

. /etc/init.d/functions

RETVAL=0

prog=dhcrelay
dhcrelay=/usr/sbin/dhcrelay
lockfile=/var/lock/subsys/dhcrelay
pidfile=/var/run/dhcrelay.pid
conf=/etc/sysconfig/dhcrelay

# The dhcrelay daemon uses the sysconfig file for configuration information.
# There is no native configuration file for this program and you must specify
# its settings on the command line.
[ -f /etc/sysconfig/dhcrelay ] && . /etc/sysconfig/dhcrelay

configtest() {
    [ -x $dhcrelay ] || exit 5
    [ -f $conf ] || exit 6
    [ -z "$DHCPSERVERS" ] && exit 6
    RETVAL=0
    return $RETVAL
}

start() {
    [ -x $dhcrelay ] || exit 5
    [ -f $conf ] || exit 6

    pidofproc $prog >/dev/null 2>&1
    RETVAL=$?
    [ $RETVAL -eq 0 ] && return $RETVAL

    echo -n $"Starting $prog: "
    daemon $dhcrelay $([ -n "$INTERFACES" ] && for int in $INTERFACES ; do echo -n " -i $int" ; done) $DHCPSERVERS 2>/dev/null
    RETVAL=$?
    echo
    [ $RETVAL -eq 0 ] && touch $lockfile
    return $RETVAL
}

stop() {
    pidofproc $prog >/dev/null 2>&1
    if [ $? -ne 0 ]; then
        RETVAL=7
        return $RETVAL
    fi

    echo -n $"Shutting down $prog: "
    killproc $prog -TERM
    RETVAL=$?

    [ $RETVAL = 0 ] && success || failure
    echo
    [ $RETVAL = 0 ] && rm -f $lockfile
    return $RETVAL
}

if [ ! -x $dhcrelay ]; then
    RETVAL=5
    exit $RETVAL
fi

if [ $# -gt 1 ]; then
    RETVAL=2
    exit $RETVAL
fi

case "$1" in
    start)
        start
        RETVAL=$?
        ;;
    stop)
        stop
        RETVAL=$?
        ;;
    restart|force-reload)
        stop && start
        RETVAL=$?
        ;;
    condrestart)
        if [ -f $lockfile ]; then
            stop && start
            RETVAL=$?
        fi
        ;;
    configtest)
        configtest
        RETVAL=$?
        ;;
    status)
        status $prog
        RETVAL=$?
        ;;
    *)
        echo $"Usage: $0 {start|stop|restart|condrestart|configtest|status}"
        RETVAL=3
        ;;
esac

exit $RETVAL