#!/sbin/runscript
# Copyright 1999-2010 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: $

opts="configtest"

DHCPD_CONF=${DHCPD_CONF:-/etc/dhcp/dhcpd.conf}
DHCPD6_CONF=${DHCPD6_CONF:-/etc/dhcp/dhcpd6.conf}

depend() {
	need net
	use logger dns
}

get_var() {
	sed -n 's/^[[:blank:]]\?'"$1"' "*\([^#";]\+\).*/\1/p' \
		"${DHCPD_CHROOT}/${DHCPD_CONF}"
}

get_var6() {
	sed -n 's/^[[:blank:]]\?'"$1"' "*\([^#";]\+\).*/\1/p' \
		"${DHCPD_CHROOT}/${DHCPD6_CONF}"
}

checkconfig() {
        if [ -f "${DHCPD_CHROOT}/${DHCPD_CONF}" ] ; then
		/usr/sbin/dhcpd -cf ${DHCPD_CHROOT}/${DHCPD_CONF} -t 1 -4 >/dev/null 2>&1
		ret=$?
		if [ $ret -ne 0 ]; then
			eerror "${SVCNAME} has detected a syntax error in your configuration files:"
			/usr/sbin/dhcpd -cf ${DHCPD_CHROOT}/${DHCPD_CONF} -t -4
		fi
	fi

        if [ -f "${DHCPD_CHROOT}/${DHCPD_CONF6}" ] ; then
		/usr/sbin/dhcpd -cf ${DHCPD_CHROOT}/${DHCPD6_CONF} -t 1 -6 >/dev/null 2>&1
		ret=$?
		if [ $ret -ne 0 ]; then
			eerror "${SVCNAME}6 has detected a syntax error in your configuration files:"
			/usr/sbin/dhcpd -cf ${DHCPD_CHROOT}/${DHCPD6_CONF} -t -6
		fi
	fi

	return $ret
}

configtest() {
	ebegin "Checking ${SVCNAME} configuration"
	checkconfig
	eend $?
}

start() {
	# Work out our cffile if it's on our DHCPD_OPTS
	case " ${DHCPD_OPTS} " in
		*" -cf "*) 
			DHCPD_CONF=" ${DHCPD_OPTS} "
			DHCPD_CONF="${DHCPD_CONF##* -cf }"
			DHCPD_CONF="${DHCPD_CONF%% *}"
			;;
		*)	DHCPD_OPTS="${DHCPD_OPTS} -cf ${DHCPD_CONF}"
			;;
	esac

	case " ${DHCPD6_OPTS} " in
		*" -cf "*) 
			DHCPD6_CONF=" ${DHCPD6_OPTS} "
			DHCPD6_CONF="${DHCPD6_CONF##* -cf }"
			DHCPD6_CONF="${DHCPD6_CONF%% *}"
			;;
		*)	DHCPD6_OPTS="${DHCPD6_OPTS} -cf ${DHCPD6_CONF}"
			;;
	esac

	if [ ! -f "${DHCPD_CHROOT}/${DHCPD_CONF}" ] && [ ! -f "${DHCPD_CHROOT}/${DHCPD6_CONF}" ] ; then
		eerror "${DHCPD_CHROOT}/${DHCPD_CONF} and/or ${DHCPD_CHROOT}/${DHCPD6_CONF} does not exist, you need at least one!"
		return 1
	fi

	checkconfig || return 1

	# Setup LD_PRELOAD so name resolution works in our chroot.
	if [ -n "${DHCPD_CHROOT}" ] ; then
	    LD_PRELOAD="${LD_PRELOAD} /usr/lib/libresolv.so"
	    export LD_PRELOAD="${LD_PRELOAD} /usr/lib/libnss_dns.so"
	fi

	if [ -f "${DHCPD_CHROOT}/${DHCPD_CONF}" ] ; then
		local leasefile="$(get_var lease-file-name)"
		leasefile="${DHCPD_CHROOT}/${leasefile:-/var/lib/dhcp/dhcpd.leases}"
		if [ ! -f "${leasefile}" ] ; then
			ebegin "Creating ${leasefile}"
			touch "${leasefile}"
			chown dhcp:dhcp "${leasefile}"
			eend $? || return 1
		fi

		local pidfile="$(get_var pid-file-name)"
		pidfile="${pidfile:-/var/run/dhcp/dhcpd.pid}"

		ebegin "Starting ${DHCPD_CHROOT:+chrooted }${SVCNAME}"
		start-stop-daemon --start --exec /usr/sbin/dhcpd \
			--pidfile "${DHCPD_CHROOT}/${pidfile}" \
			-- ${DHCPD_OPTS} -q -pf "${pidfile}" -4 \
			-user dhcp -group dhcp \
			${DHCPD_CHROOT:+-chroot} ${DHCPD_CHROOT} ${DHCPD_IFACE}
		eend $? \
			&& save_options chroot "${DHCPD_CHROOT}" \
		 	&& save_options pidfile "${pidfile}"
	fi

	if [ -f "${DHCPD_CHROOT}/${DHCPD6_CONF}" ] ; then
		local leasefile6="$(get_var6 lease-file-name)"
		leasefile6="${DHCPD_CHROOT}/${leasefile6:-/var/lib/dhcp/dhcpd6.leases}"
		if [ ! -f "${leasefile6}" ] ; then
			ebegin "Creating ${leasefile6}"
			touch "${leasefile6}"
			chown dhcp:dhcp "${leasefile6}"
			eend $? || return 1
		fi

		local pidfile6="$(get_var6 pid-file-name)"
		pidfile6="${pidfile6:-/var/run/dhcp/dhcpd6.pid}"

		ebegin "Starting ${DHCPD_CHROOT:+chrooted }${SVCNAME}6"
		start-stop-daemon --start --exec /usr/sbin/dhcpd \
			--pidfile "${DHCPD_CHROOT}/${pidfile6}" \
			-- ${DHCPD6_OPTS} -q -pf "${pidfile6}" -6 \
			-user dhcp -group dhcp \
			${DHCPD_CHROOT:+-chroot} ${DHCPD_CHROOT} ${DHCPD6_IFACE}
		eend $? \
			&& save_options chroot "${DHCPD_CHROOT}" \
			&& save_options pidfile6 "${pidfile6}"
	fi
}

stop() {
	local chroot="$(get_options chroot)"
	
	ebegin "Stopping ${chroot:+chrooted }${SVCNAME}"
	start-stop-daemon --stop --exec /usr/sbin/dhcpd \
	    --pidfile "${chroot}/$(get_options pidfile)"
	eend $?

	ebegin "Stopping ${chroot:+chrooted }${SVCNAME}6"
	start-stop-daemon --stop --exec /usr/sbin/dhcpd \
	    --pidfile "${chroot}/$(get_options pidfile6)"
	eend $?
}