#!/bin/sh
#
# $Id: dhcp3-server.init.d,v 1.4 2003/07/13 19:12:41 mdz Exp $
#

### BEGIN INIT INFO
# Provides:          dhcp3-server
# Required-Start:    $network
# Required-Stop:     $network
# Should-Start:      $local_fs
# Should-Stop:       $local_fs
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: DHCP server
# Description:       Dynamic Host Configuration Protocol Server
### END INIT INFO

PATH=/sbin:/bin:/usr/sbin:/usr/bin

test -f /usr/sbin/dhcpd3 || exit 0

. /lib/lsb/init-functions

# It is not safe to start if we don't have a default configuration...
if [ ! -f /etc/default/dhcp3-server ]; then
	usplash_write "QUIT"

	log_failure_msg "/etc/default/dhcp3-server does not exist! - Aborting..."
	log_failure_msg "Run 'dpkg-reconfigure dhcp3-server' to fix the problem."
	exit 0
fi

# Default config file
CONFIG_FILE=/etc/dhcp3/dhcpd.conf

# Allow ltsp to override
if [ -f /etc/ltsp/dhcpd.conf ]; then
       CONFIG_FILE=/etc/ltsp/dhcpd.conf
fi

# Read init script configuration (so far only interfaces the daemon
# should listen on.)
. /etc/default/dhcp3-server

NAME=dhcpd3
DESC="DHCP server"
DHCPDPID=/var/run/dhcp3-server/dhcpd.pid

test_config()
{
	if ! /usr/sbin/dhcpd3 -t -cf $CONFIG_FILE > /dev/null 2>&1; then
		echo "dhcpd self-test failed. Please fix the config file."
		echo "The error was: "
		/usr/sbin/dhcpd3 -t -cf $CONFIG_FILE 2>&1| sed '1,4d'
		exit 1
	fi
}

# single arg is -v for messages, -q for none
check_status()
{
	if [ ! -r "$DHCPDPID" ]; then
		test "$1" != -v || echo "$NAME is not running."
		return 3
	fi
	if read pid < "$DHCPDPID" && ps -p "$pid" > /dev/null 2>&1; then
		test "$1" != -v || echo "$NAME is running."
		return 0
	else
		test "$1" != -v || echo "$NAME is not running but $DHCPDPID exists."
		return 1
	fi
}

case "$1" in
	start)
		test_config

		# allow dhcp server to write lease and pid file
		mkdir -p /var/run/dhcp3-server
		chown dhcpd:dhcpd /var/run/dhcp3-server
		[ -e /var/lib/dhcp3/dhcpd.leases ] || touch /var/lib/dhcp3/dhcpd.leases
		chown dhcpd:dhcpd /var/lib/dhcp3 /var/lib/dhcp3/dhcpd.leases
		if [ -e /var/lib/dhcp3/dhcpd.leases~ ]; then
		    chown dhcpd:dhcpd /var/lib/dhcp3/dhcpd.leases~
		fi

		log_daemon_msg "Starting $DESC" "$NAME"
		start-stop-daemon --start --quiet --pidfile $DHCPDPID \
			--exec /usr/sbin/dhcpd3 -- -q -pf $DHCPDPID -cf $CONFIG_FILE $INTERFACES 
		sleep 2

		if check_status -q; then
			log_end_msg 0
		else
			log_end_msg 1
			exit 1
		fi
		;;
	stop)
		log_daemon_msg "Stopping $DESC" "$NAME"
		start-stop-daemon --stop --quiet --pidfile $DHCPDPID
		log_end_msg $?
		rm -f "$DHCPDPID"
		;;
	restart | force-reload)
		test_config
		$0 stop
		sleep 2
		$0 start
		if [ "$?" != "0" ]; then
			exit 1
		fi
		;;
	status)
		echo -n "Status of $DESC: "
		check_status -v
		exit "$?"
		;;
	*)
		echo "Usage: $0 {start|stop|restart|force-reload|status}"
		exit 1 
esac

exit 0
