#!@BASHPATH@

# Authors:
#  Andrew Beekhof <abeekhof@redhat.com>
#  Fabio M. Di Nitto <fdinitto@redhat.com>
#
# License: Revised BSD

# chkconfig: - 20 80
# description: Corosync Cluster Engine
# processname: corosync
#
### BEGIN INIT INFO
# Provides:		corosync
# Required-Start:	$network $syslog
# Required-Stop:	$network $syslog
# Default-Start:
# Default-Stop:
# Short-Description:	Starts and stops Corosync Cluster Engine.
# Description:		Starts and stops Corosync Cluster Engine.
### END INIT INFO

desc="Corosync Cluster Engine"
prog="corosync"
prog_pid_file="@LOCALSTATEDIR@/run/$prog.pid"

# set secure PATH
PATH="/sbin:/bin:/usr/sbin:/usr/bin:@SBINDIR@"

success()
{
	echo -ne "[  OK  ]\r"
}

failure()
{
	echo -ne "[FAILED]\r"
}

warning()
{
	echo -ne "[WARNING]\r"
}

# pid_var_run pid_file
# Echo pid from given pid_file.
# Returns LSB exit code for the 'status' action.
pid_var_run()
{
	local pid_file="$1"
	local pid

	if [ -f "$pid_file" ]; then
		[ ! -r "$pid_file" ] && return 4
		pid=$(cat "$pid_file")
		[ -z "$pid" ] && return 1
		[ -n "${pid//[0-9]/}" ] && return 1
		if kill -n 0 "$pid" 2>/dev/null;then
			echo "$pid"
			return 0
		else
			return 1
		fi
	fi

	return 3
}

# status [-p pid_file] {program}
status()
{
	local pid_file

	if [ "$1" = "-p" ]; then
		pid_file=$2
		shift 2
	fi

	pid=$(pid_var_run "$pid_file" 2>/dev/null)
	res=$?
	if [ $res -ne 0 -a -z "$pid_file" ]; then
		pid=$(__pids_pidof "$1")
		[ -n "$pid" ]
		res=$?
	fi

	if [ $res -ne 0 ]; then
		echo "$1 is stopped"
	else
		echo "$1 (pid $pid) is running..."
	fi
	return $res
}

[ -f @INITCONFIGDIR@/$prog ] && . @INITCONFIGDIR@/$prog

case '@INITCONFIGDIR@' in
    */sysconfig) # rpm based distros
	[ -f @INITDDIR@/functions ] && . @INITDDIR@/functions
	[ -z "$LOCK_FILE" ] && LOCK_FILE="@LOCALSTATEDIR@/lock/subsys/$prog";;
    */default) # deb based distros
	[ -z "$LOCK_FILE" ] && LOCK_FILE="@LOCALSTATEDIR@/lock/$prog";;
esac

# The version of __pids_pidof in /etc/init.d/functions calls pidof with -x
# This means it matches scripts, including this one.
# Redefine it here so that status (from the same file) works.
# Otherwise simultaneous calls to stop() will loop forever
__pids_pidof() {
        pidof -c -o $$ -o $PPID -o %PPID "$1" || \
                pidof -c -o $$ -o $PPID -o %PPID "${1##*/}"
}

cluster_disabled_at_boot()
{
       if grep -q nocluster /proc/cmdline && \
          [ "$(tty)" = "/dev/console" ]; then
               echo -e "not configured to run at boot"
               failure
               return 1
       fi
       return 0
}

wait_for_ipc()
{
	try=0
	max_try=$((COROSYNC_INIT_TIMEOUT*2-1))
	[ "$max_try" -le "0" ] && max_try=120

	while [ "$try" -le "$max_try" ]; do
		if corosync-cpgtool > /dev/null 2>&1; then
			return 0
		fi
		sleep 0.5
		try=$((try + 1))
	done

	return 1
}

start()
{
	echo -n "Starting $desc ($prog): "

	! cluster_disabled_at_boot && return

	# most recent distributions use tmpfs for @LOCALSTATEDIR@/run
	# to avoid to clean it up on every boot.
	# they also assume that init scripts will create
	# required subdirectories for proper operations
	mkdir -p @LOCALSTATEDIR@/run

	if status -p "$prog_pid_file" "$prog" > /dev/null 2>&1; then
		success
	else
		$prog $COROSYNC_OPTIONS > /dev/null 2>&1

		if [ "$?" != 0 ] || ! wait_for_ipc; then
			failure
			rtrn=1
		else
			touch $LOCK_FILE
			if corosync-cfgtool -s > /dev/null 2>&1; then
				success
			else
				warning
			fi
		fi
	fi
	echo
}

stop()
{
	! status -p "$prog_pid_file" "$prog" > /dev/null 2>&1 && return

	echo -n "Signaling $desc ($prog) to terminate: "
	kill -TERM "$(pid_var_run $prog_pid_file)" > /dev/null 2>&1
	success
	echo

	echo -n "Waiting for $prog services to unload:"
	while status -p "$prog_pid_file" "$prog" > /dev/null 2>&1; do
		sleep 1
		echo -n "."
	done

	rm -f $LOCK_FILE
	success
	echo
}

restart()
{
	stop
	start
}

rtrn=0

case "$1" in
start)
	start
;;
restart|reload|force-reload)
	restart
;;
condrestart|try-restart)
	if status -p "$prog_pid_file" "$prog" > /dev/null 2>&1; then
		restart
	fi
;;
status)
	status -p "$prog_pid_file" "$prog"
	rtrn=$?
;;
stop)
	stop
;;
*)
	echo "usage: $0 {start|stop|restart|reload|force-reload|condrestart|try-restart|status}"
	rtrn=2
;;
esac

exit $rtrn
