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#!/sbin/openrc-run
# Copyright 1999-2014 Gentoo Foundation
# Distributed under the terms of the GNU General Public License v2

extra_commands="status"

depend() {
	need xenstored
	after dhcp xend xenconsoled
}

get_domname() {
	local name_from_file=$(sed -rn 's/^name\W*=\W*\"?([[:alnum:]_\.-]+)\"?\W*;?/\1/p' "${1}" | tail -n 1)

	if [ -z ${name_from_file} ] ; then
		basename "${1}"
	else
		echo ${name_from_file}	
	fi
}

is_running() {
	/usr/sbin/xl list "${1}" >/dev/null 2>&1
}

using_screen() {
	[ "${SCREEN}" = "yes" -o "${SCREEN}" = "YES" ]
}

set_screen_cmd() {
	screen_cmd="screen -c ${SCREENRC:-/dev/null} -q -r ${SCREEN_NAME:=xen} -X"
}

start() {
	set_screen_cmd

	einfo "Starting Xen domains from ${AUTODIR:=/etc/xen/auto}"
	if using_screen ; then
		ebegin "Creating screen session to hold domain consoles"
		(  screen -c ${SCREENRC:-/dev/null} -d -m -S ${SCREEN_NAME} -t dom0 \
		&& sleep 5 \
		&& ${screen_cmd} zombie dr \
		&& logrotate -f /etc/xen/xen-consoles.logrotate \
		&& ${screen_cmd} logfile  /var/log/xen-consoles/%t.log \
		&& ${screen_cmd} logfile flush ${SCREEN_LOG_INTERVAL:-1} \
		&& ${screen_cmd} log on \
		&& ${screen_cmd} deflog on ) >/dev/null
		if [ $? -ne 0 ] ; then
			eend 1
			return 1
		else
			eend
		fi
	fi
	# Create all domains with config files in AUTODIR.
	for dom in $(ls "${AUTODIR:=/etc/xen/auto}/"* 2>/dev/null | sort); do
		name=$(get_domname ${dom})
		if ! is_running ${name} ; then
			ebegin "  Starting domain ${name}"
			if using_screen ; then
				${screen_cmd} screen -t ${name} xl create ${dom} -c
			else
				xl create --quiet ${dom}
			fi
			eend $?
		else
			einfo "  Not starting domain ${name} - already running"
		fi
	done
}

stop() {
	set_screen_cmd

	einfo "Shutting down Xen domains from ${AUTODIR:=/etc/xen/auto}"
	# Stop all domains with config files in AUTODIR.
	DOMAINS="$(ls "${AUTODIR:=/etc/xen/auto}/"* 2>/dev/null | sort -r)"

	if [ "$PARALLEL_SHUTDOWN" = "yes" ] ; then
		for dom in $DOMAINS ; do
			name=$(get_domname ${dom})
			if is_running ${name} ; then
				ebegin "  Asking domain ${name} to shutdown in the background..."
				xl shutdown -w ${name} >/dev/null &
			else
				einfo "  Not stopping domain ${name} - not running"
			fi
		done
		einfo "  Waiting for shutdown of domains that are still running"
		wait
		eend $?
	else
		for dom in $DOMAINS ; do
			name=$(get_domname ${dom})
			if is_running ${name} ; then
				ebegin "  Waiting for domain ${name} to shutdown"
				xl shutdown -w ${name} >/dev/null
				eend $?
			else
				einfo "  Not stopping domain ${name} - not running"
			fi
		done
	fi
	if using_screen ; then
		if ${screen_cmd} sleep 0 >/dev/null 2>&1 ; then
			ebegin "Closing screen session ${SCREEN_NAME}"
			${screen_cmd} quit
			eend $?
		else
			eend 0
		fi
	fi
}

status() {
	/usr/sbin/xl list
}