#! /bin/sh
### BEGIN INIT INFO
# Provides:          jenkins-slave
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Example initscript
# Description:       This file should be used to construct scripts to be
#                    placed in /etc/init.d.
### END INIT INFO

# Author: Yung-Yu Chen <yyc@solvcon.net>
#
# Please remove the "Author" lines above and replace them
# with your own name if you copy and modify this script.

# Do NOT "set -e"

# PATH should only include /usr/* if it runs after the mountnfs.sh script
PATH=/sbin:/usr/sbin:/bin:/usr/bin
DESC="jenkins slave"
NAME=jenkins-slave
#DAEMON=/usr/bin/java
DAEMON=/usr/bin/daemon
SCRIPTNAME=/etc/init.d/$NAME

WGET=wget
SU=/bin/su

# Read configuration variable file if it is present
[ -r /etc/default/$NAME ] && . /etc/default/$NAME

# Load the VERBOSE setting and other rcS variables
. /lib/init/vars.sh

# Define LSB log_* functions.
# Depend on lsb-base (>= 3.2-14) to ensure that this file is present
# and status_of_proc is working.
. /lib/lsb/init-functions

PIDFILE=$JENKINS_SLAVE_ROOT/$NAME.pid
DAEMON_ARGS="--user=$JENKINS_SLAVE_USER --output=$JENKINS_SLAVE_LOG "\
"--pidfile=$PIDFILE --command=java -- "\
"-jar $JENKINS_SLAVE_JAR -jnlpUrl $JENKINS_NODE_URL"

#
# Function that starts the daemon/service
#
do_start()
{
	# Return
	#   0 if daemon has been started
	#   1 if daemon was already running
	#   2 if daemon could not be started
	[ "$JENKINS_SLAVE_USER" = "" ] && return 2
	[ "$JENKINS_SLAVE_HOME" = "" ] && return 2
	start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON --test > /dev/null \
		|| return 1
	mkdir $JENKINS_SLAVE_ROOT > /dev/null 2>&1 || true
	chown $JENKINS_SLAVE_USER $JENKINS_SLAVE_ROOT
	cd $JENKINS_SLAVE_ROOT
	$SU -l $JENKINS_SLAVE_USER -c \
		"wget -q -r $JENKINS_SLAVE_JAR_URL -O $JENKINS_SLAVE_JAR"
	# XXX: a hack to make ssh key-auth work for solvcon.helper.get_username().
	export LOGNAME=$JENKINS_SLAVE_USER
	# XXX: similar to the hack, but not of real use.
	export USER=$JENKINS_SLAVE_USER
	export USERNAME=$JENKINS_SLAVE_USER
	export HOME=$JENKINS_SLAVE_HOME
	start-stop-daemon --start --pidfile $PIDFILE --exec $DAEMON \
		-- $DAEMON_ARGS || return 2
}

#
# Function that stops the daemon/service
#
do_stop()
{
	# Return
	#   0 if daemon has been stopped
	#   1 if daemon was already stopped
	#   2 if daemon could not be stopped
	#   other if a failure occurred
	#start-stop-daemon --stop --retry=TERM/30/KILL/5 --pidfile $PIDFILE --name $NAME
	RETVAL="$?"
	#[ "$RETVAL" = 2 ] && return 2
	# Wait for children to finish too if this is a daemon that forks
	# and if the daemon is only ever run from this initscript.
	# If the above conditions are not satisfied then add some other code
	# that waits for the process to drop all resources that could be
	# needed by services started subsequently.  A last resort is to
	# sleep for some time.
	start-stop-daemon --stop --oknodo --retry=TERM/30/KILL/5 --exec $DAEMON
	[ "$?" = 2 ] && return 2
	RETVAL="$?"
	# Many daemons don't delete their pidfiles when they exit.
	rm -f $PIDFILE
	return "$RETVAL"
}

#
# Function that sends a SIGHUP to the daemon/service
#
do_reload() {
	#
	# If the daemon can reload its configuration without
	# restarting (for example, when it is sent a SIGHUP),
	# then implement that here.
	#
	start-stop-daemon --stop --signal 1 --quiet --pidfile $PIDFILE --name $NAME
	return 0
}

case "$1" in
  start)
	[ "$VERBOSE" != no ] && log_daemon_msg "Starting $DESC" "$NAME"
	do_start
	case "$?" in
		0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
	esac
	;;
  stop)
	[ "$VERBOSE" != no ] && log_daemon_msg "Stopping $DESC" "$NAME"
	do_stop
	case "$?" in
		0|1) [ "$VERBOSE" != no ] && log_end_msg 0 ;;
		2) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
	esac
	;;
  restart|force-reload)
	#
	# If the "reload" option is implemented then remove the
	# 'force-reload' alias
	#
	log_daemon_msg "Restarting $DESC" "$NAME"
	do_stop
	case "$?" in
	  0|1)
		do_start
		case "$?" in
			0) log_end_msg 0 ;;
			1) log_end_msg 1 ;; # Old process is still running
			*) log_end_msg 1 ;; # Failed to start
		esac
		;;
	  *)
	  	# Failed to stop
		log_end_msg 1
		;;
	esac
	;;
  *)
	#echo "Usage: $SCRIPTNAME {start|stop|restart|reload|force-reload}" >&2
	echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
	exit 3
	;;
esac

:
