#!/sbin/runscript
# Copyright 1999-2010 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/net-dns/bind/files/named.init-r8,v 1.3 2010/10/24 20:47:17 idl0r Exp $

opts="start stop reload restart"

depend() {
	need net
	use logger
	provide dns
}

NAMED_CONF=${CHROOT}/etc/bind/named.conf

_mount() {
	local from
	local to
	local opts

	if [ "${#}" -lt 3 ]; then
		eerror "_mount(): to few arguments"
		return 1
	fi

	from=$1
	to=$2
	shift 2

	opts="${*}"
	shift $#

	if [ -z "$(grep ${to} /proc/mounts)" ]; then
		einfo "mounting ${from} to ${to}"
		mount ${from} ${to} ${opts} || return 1
	fi
}

_umount() {
	local dir=$1

	if [ -n "$(grep ${dir} /proc/mounts)" ]; then
		einfo "umount ${dir}"
		umount ${dir}
	fi
}

check_chroot() {
	if [ -n "${CHROOT}" ]; then
		[ ! -d "${CHROOT}" ] && return 1
		[ ! -d "${CHROOT}/dev" ] || [ ! -d "${CHROOT}/etc" ] || [ ! -d "${CHROOT}/var" ] && return 1
		[ ! -d "${CHROOT}/var/run" ] || [ ! -d "${CHROOT}/var/log" ] && return 1
		[ ! -d "${CHROOT}/etc/bind" ] || [ ! -d "${CHROOT}/var/bind" ] && return 1
		[ ! -d "${CHROOT}/var/log/named" ] && return 1
		[ ! -e "${CHROOT}/etc/localtime" ] && return 1
		[ ! -c "${CHROOT}/dev/null" ] || [ ! -c "${CHROOT}/dev/zero" ] && return 1
		[ ! -c "${CHROOT}/dev/random" ] && [ ! -c "${CHROOT}/dev/urandom" ] && return 1
	fi

	return 0
}

checkconfig() {
	if [ ! -f "${NAMED_CONF}" ] ; then
		eerror "No ${NAMED_CONF} file exists!"
	fi

	named-checkconf -z -j ${CHROOT:+-t} ${CHROOT} ${NAMED_CONF/${CHROOT}} 1>/dev/null || {
		eerror "named-checkconf failed! Please fix your config first."
		return 1
	}

	# as suggested in bug #107724
	[ -n "${PIDFILE}" ] || PIDFILE=${CHROOT}$(\
		egrep -v \
			"^([[:cntrl:] ]+(#|//|/\*)|(#|//|/\*))" \
			${CHROOT}/etc/bind/named.conf \
				| egrep -o -m1 "pid\-file +\".+\" *;" \
				| cut -d\" -f2
	)
	[ -z "${PIDFILE}" ] && PIDFILE=${CHROOT}/var/run/named/named.pid

	return 0
}

start() {
	local piddir

	ebegin "Starting ${CHROOT:+chrooted }named"

	if [ -n "${CHROOT}" ]; then
		check_chroot || {
			eend 1
			eerror "Your chroot dir ${CHROOT} is inconsistent, please run 'emerge --config net-dns/bind' first"
			return 1
		}

		if [ "${CHROOT_NOMOUNT:-0}" -eq 0 ]; then
			einfo "Mounting chroot dirs"
			_mount /etc/bind ${CHROOT}/etc/bind -o bind
			_mount /var/bind ${CHROOT}/var/bind -o bind
			_mount /var/log/named ${CHROOT}/var/log/named -o bind
		fi
	fi

	checkconfig || {
		eend 1
		return 1
	}

	# create piddir (usually /var/run/named) if necessary
	piddir="${PIDFILE%/*}"
	if [ ! -d "${piddir}" ]; then
		checkpath -q -d -o root:named -m 0770 "${piddir}" || {
			eend 1
			return 1
		}
	fi

	# In case someone have $CPU set in /etc/conf.d/named
	if [ -n "${CPU}" ] && [ "${CPU}" -gt 0 ]; then
		CPU="-n ${CPU}"
	fi

	start-stop-daemon --start --pidfile ${PIDFILE} \
		--nicelevel ${NAMED_NICELEVEL:-0} \
		--exec /usr/sbin/named \
		-- -u named ${CPU} ${OPTIONS} ${CHROOT:+-t} ${CHROOT}
	eend $?
}

stop() {
	local reported=0

	ebegin "Stopping ${CHROOT:+chrooted }named"
	checkconfig || return 2
	if [ -n "${RNDC_KEY}" ] && [ -f "${RNDC_KEY}" ]; then
		rndc $SERVER -k $RNDC_KEY stop 1>/dev/null
	else
		# -R 10, bug 335398
		start-stop-daemon --stop --retry 10 --pidfile $PIDFILE \
			--exec /usr/sbin/named
	fi

	if [ -n "${CHROOT}" ] && [ "${CHROOT_NOMOUNT:-0}" -eq 0 ]; then
		einfo "Umounting chroot dirs"

		# just to be sure everything gets clean
		while [ -n "$(fuser ${CHROOT} 2>/dev/null)" ]; do
			if [ "${reported}" -eq 0 ]; then
				einfo "Waiting until all named processes are stopped"
				reported=1
			fi
			sleep 1
		done

		_umount ${CHROOT}/etc/bind
		_umount ${CHROOT}/var/log/named
		_umount ${CHROOT}/var/bind
	fi

	eend $?
}

reload() {
	local ret

	# checkconf also gives us the pidfile.
	checkconfig || return 3

	ebegin "Reloading named.conf and zone files"
	if [ -n "${RNDC_KEY}" ] && [ -f "${RNDC_KEY}" ] ; then
		rndc $SERVER -k $RNDC_KEY reload 1>/dev/null
		ret=$?
	elif [ -n "${PIDFILE}" ]; then
		# FIXME: Remove --stop and --oknodo as soon as baselayout-1 has been removed... finally...
		start-stop-daemon --stop --oknodo --pidfile $PIDFILE --signal HUP --exec /usr/sbin/named
		ret=$?
	else
		ewarn "Neither an rndc key has been specified nor a pidfile... this is"
		ewarn "a fallback mode. Please check your installation!"

		$RC_SERVICE restart
		ret=$?
	fi

	eend $ret
}