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#!/sbin/openrc-run
# Copyright 1999-2012 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2
# $Header: /var/cvsroot/gentoo-x86/app-emulation/lxc/files/lxc.initd.2,v 1.5 2012/07/21 05:07:15 flameeyes Exp $

extra_started_commands="reboot"

description="Linux Containers (LXC)"
description_reboot="Reboot containers"

CONTAINER=${SVCNAME#*.}
: ${lxc_group:=$LXC_GROUP}
: ${systemd_container:=no}
: ${logdir:=/var/log/lxc}

command="/usr/bin/lxc-start"
pidfile="/var/run/lxc/$CONTAINER.pid"

depend() {
	need localmount sysfs cgroups
	after firewall net
}

lxc_get_configfile() {
	local i
	for i in /var/lib/lxc/${CONTAINER}/config \
			/etc/lxc/${CONTAINER}.conf \
			/etc/lxc/${CONTAINER}/config; do
		if [ -f "$i" ]; then
			echo "$i"
			return 0
		fi
	done
	eerror "Unable to find a suitable configuration file."
	eerror "If you set up the container in a non-standard"
	eerror "location, please set the CONFIGFILE variable."
	return 1
}

lxc_get_var() {
	awk 'BEGIN { FS="[ \t]*=[ \t]*" } $1 == "'$1'" { print $2; exit }' ${CONFIGFILE} | cut -d: -f2
}

checkconfig() {
	if [ ${CONTAINER} = ${SVCNAME} ]; then
		CONTAINER=
		return 0
	fi
	CONFIGFILE=${CONFIGFILE:-$(lxc_get_configfile)}

	# no need to output anything, the function takes care of that.
	[ -z "${CONFIGFILE}" ] && return 1

	utsname=$(lxc_get_var lxc.uts.name)
	if [ "${CONTAINER}" != "${utsname}" ]; then
	    eerror "You should use the same name for the service and the"
	    eerror "lxc.uts.name : Right now the lxc.uts.name is set to : ${utsname}"
	    return 1
	fi
}

systemd_ctr() {
	local cmd="$1"
	# Required for lxc-console and services inside systemd containers.
	local cgroup=/sys/fs/cgroup/systemd
	local mnt_opts='rw,nosuid,nodev,noexec,relatime,none,name=systemd'

	case "$cmd" in
		mount)
			checkpath -d $cgroup
			if ! mount | grep $cgroup >/dev/null; then
				mount -t cgroup -o $mnt_opts cgroup $cgroup
			fi
			;;
		unmount)
			if mount | grep $cgroup >/dev/null; then
				umount $cgroup
			fi
			;;
	esac
}

_autostart() {
	ebegin "$1 LXC containers"
	shift
	lxc-autostart --group "$lxc_group" "$@"
	eend $?
}

start() {
	checkconfig || return 1
	if yesno "$systemd_container"; then
		systemd_ctr mount
	fi
	if [ -z "$CONTAINER" ]; then
		_autostart "Starting"
		return
	fi

	rm -f "$logdir"/${CONTAINER}.log

	rootpath=$(lxc_get_var lxc.rootfs.path)
	# verify that container is not on tmpfs
	dev=$(df -P "${rootpath}" | awk '{d=$1}; END {print d}')
	type=$(awk -v dev="$dev" '$1 == dev {m=$3}; END {print m}' /proc/mounts)
	if [ "$type" = tmpfs ] && ! yesno "$ALLOW_TMPFS"; then
		eerror "${rootpath} is on tmpfs and ALLOW_TMPFS is not set"
		return 1
	fi

	checkpath -d -m 750 -o root:wheel $logdir

	checkpath -d ${pidfile%/*}
	ebegin "Starting container ${CONTAINER}"
	start-stop-daemon --start $command \
		--pidfile $pidfile \
		-- \
		--daemon \
		--pidfile $pidfile \
		--name ${CONTAINER} \
		--rcfile ${CONFIGFILE} \
		--logpriority WARN \
		--logfile $logdir/${CONTAINER}.log \
		|| eend $? || return $?
	lxc-wait -n ${CONTAINER} -t 5 -s RUNNING
	eend $?
}

stop() {
	checkconfig || return 1
	systemd_ctr unmount

	if [ -z "$CONTAINER" ]; then
		_autostart "Stopping" --shutdown --timeout ${LXC_TIMEOUT:-30}
		return
	fi

	ebegin "Stopping container ${CONTAINER}"
	start-stop-daemon --stop --pidfile ${pidfile} \
		--retry ${POWEROFF_SIGNAL:-SIGUSR2}/${TIMEOUT:-30} \
		--progress
	eend $?
}

reboot() {
	checkconfig || return 1
	if [ -z "$CONTAINER" ]; then
		_autostart "Rebooting" --reboot
		return
	fi

	ebegin "Sending reboot signal to container $CONTAINER"
	start-stop-daemon --signal ${RESTART_SIG:-SIGTERM} \
		--pidfile ${pidfile}
	eend $?
}