#! /bin/sh
#
# $FreeBSD$
#
# Start or stop isc-dhcrelay.
#

rc_file=${0##*/}
rc_arg=$1

# override these variables in ${PREFIX}/etc/rc.isc-dhcrelay.conf
dhcrelay_options=			# command option(s)
dhcrelay_ifaces=			# ethernet interface(s)
dhcrelay_servers=			# dhcpd server(s)

if ! PREFIX=$(expr $0 : "\(/.*\)/etc/rc\.d/${rc_file}\$"); then
	echo "${rc_file}: Cannot determine PREFIX." >&2
	echo "Please use the complete pathname." >&2
	exit 64
fi

rcconf_dir=${PREFIX}/etc
rcconf_file=rc.${rc_file%.sh}.conf
rcconf_path=${rcconf_dir}/${rcconf_file}

if [ -f ${rcconf_path} ]; then
	. ${rcconf_path}
fi

program_dir=${PREFIX}/sbin
program_file=dhcrelay
program_path=${program_dir}/${program_file}

pid_dir=/var/run
pid_file=${program_file}.pid
pid_path=${pid_dir}/${pid_file}

syslog_facility=daemon.err

case "$rc_arg" in
start)
	if [ ! -x ${program_path} ]; then
		logger -sp ${syslog_facility} -t ${program_file} \
			"unable to start: ${program_path} is missing."
		exit 72
	fi
	if [ -z "${dhcrelay_servers}" ]; then
		logger -sp ${syslog_facility} -t ${program_file} \
			"unable to start: no dhcpd server(s) configured."
		exit 64
	fi
	ifaces=
	for iface in ${dhcrelay_ifaces}; do
		ifaces="$ifaces -i $iface"
	done
	${program_path} ${dhcrelay_options} ${ifaces} ${dhcrelay_servers} &&
	echo -n " ${program_file}"
	;;
stop)
	if [ -r ${pid_path} ]; then
		kill $(cat ${pid_path}) 2> /dev/null
	else
		killall ${program_file} 2> /dev/null
	fi
	;;
restart)
	$0 stop
	$0 start
	;;
status)
	ps -auxww | egrep ${program_file} | egrep -v "($0|egrep)"
	;;
*)
	echo "usage: ${rc_file} {start|stop|restart|status}" >&2
	;;
esac

exit 0