#!/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-r7,v 1.6 2010/09/03 17:52:01 idl0r Exp $

opts="start stop reload restart"

depend() {
	need net
	use logger
	after pg_autovacuum postgresql mysql ldap
	provide dns
}

_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

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

	return 0
}

checkconfig() {
	if [ ! -f ${CHROOT}/etc/bind/named.conf ] ; then
		eerror "No ${CHROOT}/etc/bind/named.conf file exists!"
	fi

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

	# 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
	)
}

start() {
	ebegin "Starting ${CHROOT:+chrooted }named"

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

	checkconfig || return 1

	start-stop-daemon --start --quiet --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 &>/dev/null
	else
		start-stop-daemon --stop --quiet --pidfile $PIDFILE \
			--exec /usr/sbin/named
	fi

	if [[ -n ${CHROOT} ]];
	then
		einfo "Umounting chroot dirs"

		# just to be sure everything gets clean
		while [[ -n $(fuser ${CHROOT} 2>&1) ]]
		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() {
	checkconfig || return 3
	if [ ! -f $PIDFILE ] ; then
		/etc/init.d/named start &>/dev/null
		exit
	fi

	if [ -f $RNDC_KEY ] ; then
		ebegin "Reloading named.conf and zone files"
		rndc $SERVER -k $RNDC_KEY reload &>/dev/null
		eend $?
	else
		/etc/init.d/named restart &>/dev/null
	fi
}