ClickHouse/tools/init.d/template

#! /bin/sh
### BEGIN INIT INFO
# Provides:          @DAEMON@
# Default-Start:     2 3 4 5
# Default-Stop:      1
# Short-Description: Yandex daemon
### END INIT INFO

USER=metrica
GROUP=metrica
SHELL=/bin/sh
PROGRAM=@DAEMON@
SYSCONFDIR=/etc/$PROGRAM
PIDDIR=/var/run/$PROGRAM
LOGDIR=/var/log/$PROGRAM
LOCALSTATEDIR=/var/lock
BINDIR=/usr/bin
CRONFILE=/etc/cron.d/@CRONFILE@

[ -x $BINDIR/$PROGRAM ] || exit 0

CNFFILE=$SYSCONFDIR/config.xml
PIDFILE=$PIDDIR/$PROGRAM.pid
LOCKFILE=$LOCALSTATEDIR/$PROGRAM
RETVAL=0

isrun()
{
	[ -r "$PIDFILE" ] && pgrep -s `cat "$PIDFILE"` >/dev/null 2>&1 && return 0 || return 1
}

wait4done()
{
	while isrun; do
		sleep 1
	done
}

start()
{
	local EXIT_STATUS
	EXIT_STATUS=0

	echo -n "Start $PROGRAM service: "

	if isrun; then
		echo -n "already running "
		EXIT_STATUS=1
	else
		# Clean stale lock files
		rm -f "$PIDFILE" "$LOCKFILE"
		
		mkdir -p $LOGDIR
		mkdir -p $PIDDIR
		chown -R $USER:$GROUP $LOGDIR
		chown -R $USER:$GROUP $PIDDIR

		su -l $USER -s $SHELL -c "\"$BINDIR/$PROGRAM\" --daemon --pid-file=\"$PIDFILE\" --config-file=\"$CNFFILE\""
		EXIT_STATUS=$?
	fi

	if [ $EXIT_STATUS -eq 0 ]; then
		touch "$LOCKFILE"
		echo "DONE"
	else
		echo "FAILED"
	fi

	return $EXIT_STATUS
}

stop()
{
	local EXIT_STATUS
	EXIT_STATUS=0

	echo -n "Stop $PROGRAM service: "

	if isrun; then
		kill -INT `cat "$PIDFILE"`
		wait4done
		rm -f "$LOCKFILE"
	fi

	echo "DONE"
	return $EXIT_STATUS
}

restart()
{
	stop
	start
}

enable_cron()
{
	sed -i 's/^#*//' "$CRONFILE"
}

disable_cron()
{
	sed -i 's/^#*/#/' "$CRONFILE"
}

# See how we were called.
EXIT_STATUS=0
case "$1" in
	start)
		start && enable_cron
		;;
	stop)
		disable_cron && stop
		;;
	status)
		isrun && echo "$PROGRAM service is running" || echo "$PROGRAM service is stopped"
		;;
	restart)
		restart && enable_cron
		;;
	reload)
		restart
		;;
	condstart)
		isrun || start
		;;
	condstop)
		isrun && stop
		;;
	condrestart)
		isrun && restart
		;;
	condreload)
		isrun && restart
		;;
	fallenstart)
		[ -r "$PIDFILE" ] && start
		;;
	*)
		echo "Usage: ${0##*/} {start|stop|status|restart|reload|condstart|condstop|condrestart|condreload|fallenstart}"
		EXIT_STATUS=2
esac

exit $EXIT_STATUS