#!/bin/bash
#
# Copyright (c) 2016 SUSE Linux GmbH
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of version 2.1 of the GNU Lesser General Public
# License as published by the Free Software Foundation.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library; If not, see <http://www.gnu.org/licenses/>.
#

initd=$1

case "$initd" in
	sysv) nonl='-n' ;;
	systemd) nonl= ;;
	*)
	echo "first argument must be 'sysv' or 'systemd'"
	exit 1
	;;
esac

XENSTORED=/usr/sbin/xenstored

. /etc/xen/scripts/hotplugpath.sh

test_xenstore () {
	test -f /var/run/xen/xenstored.pid
	return $?
}

timeout_xenstore () {
	local time=0
	local timeout=30

	while [ $time -lt $timeout ] && ! test_xenstore ; do
		echo -n .
		time=$(($time+1))
		sleep 1
	done
	echo
 
	# Exit if we timed out
	if ! [ $time -lt $timeout ] ; then
		echo "Could not start $@"
		return 1
	fi

	return 0
}

if test "$initd" = 'sysv' ; then
	test_xenstore && exit 0
fi

test -f /etc/sysconfig/xencommons && . /etc/sysconfig/xencommons

[ "$XENSTORETYPE" = "" ] && XENSTORETYPE=daemon

/bin/mkdir -p /var/run/xen

[ "$XENSTORETYPE" = "daemon" ] && {
	[ -z "$XENSTORED_ROOTDIR" ] && XENSTORED_ROOTDIR="/var/lib/xenstored"
	[ -z "$XENSTORED_TRACE" ] || XENSTORED_ARGS="$XENSTORED_ARGS -T /var/log/xen/xenstored-trace.log"
	[ -z "$XENSTORED" ] && XENSTORED=/usr/sbin/xenstored
	[ -x "$XENSTORED" ] || {
		echo "No xenstored found"
		exit 1
	}
	[ "$initd" = 'sysv' ] && {
		echo $nonl Starting $XENSTORED...
		$XENSTORED --pid-file /var/run/xen/xenstored.pid $XENSTORED_ARGS
		timeout_xenstore $XENSTORED || exit 1
		exit 0
	}

	exec $XENSTORED -N $XENSTORED_ARGS
	exit 1
}

[ "$XENSTORETYPE" = "domain" ] && {
	[ -z "$XENSTORE_DOMAIN_KERNEL" ] && XENSTORE_DOMAIN_KERNEL=/usr/lib/xen/boot/xenstore-stubdom.gz
	XENSTORE_DOMAIN_ARGS="$XENSTORE_DOMAIN_ARGS --kernel $XENSTORE_DOMAIN_KERNEL"
	[ -z "$XENSTORE_DOMAIN_SIZE" ] && XENSTORE_DOMAIN_SIZE=32
	XENSTORE_DOMAIN_ARGS="$XENSTORE_DOMAIN_ARGS --memory $XENSTORE_DOMAIN_SIZE"
	[ -z "$XENSTORE_MAX_DOMAIN_SIZE" ] && XENSTORE_MAX_DOMAIN_SIZE="1/100"
	XENSTORE_DOMAIN_ARGS="$XENSTORE_DOMAIN_ARGS --maxmem $XENSTORE_MAX_DOMAIN_SIZE"

	echo $nonl Starting $XENSTORE_DOMAIN_KERNEL...
	${LIBEXEC_BIN}/init-xenstore-domain $XENSTORE_DOMAIN_ARGS || exit 1
	[ "$initd" = 'systemd' ] && {
		systemd-notify --ready
		sleep 9
	}

	exit 0
}

echo "illegal value $XENSTORETYPE for XENSTORETYPE"
exit 1
