#! /bin/sh
### BEGIN INIT INFO
# Provides:          rsync-inotify
# Required-Start:    $syslog $local_fs $network
# Required-Stop:     $syslog $local_fs $network
# Should-Start:      $named
# Should-Stop:       $named
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Rsync-inotify launcher
# Description:       This script launch the rsync-inotify script on the upload
#                    of the XXX instances project.
### END INIT INFO

# 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="Rsync-Inotify for XXX instances"
NAME=inotify-rsync
DAEMON=/root/script_inotify-rsync.sh
# J'arrive pas à le faire passer correctement à start-stop-daemon :-(
#DAEMON_ARGS='-r "-q -aH --delete --password-file=/root/.inotify-rsync-password" -s /srv/XXX/ -d "rsync://XXX-storage-master@srv2.example.net/XXX-storage/"'
PIDFILE=/var/run/$NAME.pid
SCRIPTNAME=/etc/init.d/inotify-rsync.sh



# Exit if the package is not installed
[ -x "$DAEMON" ] || exit 0

# 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

#
# 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
	if [ -n "$( pgrep -f "$DAEMON" )" ]; then
		return 1
	fi

	start-stop-daemon --start -b --make-pidfile --iosched idle --nicelevel 10 --exec "$DAEMON" --pidfile "$PIDFILE" --test > /dev/null \
		|| return 1
	start-stop-daemon --start -b --make-pidfile --iosched idle --nicelevel 10 --exec "$DAEMON" --pidfile "$PIDFILE" -- \
		-r "-q -aH --delete --password-file=/root/.inotify-rsync-password" -s /srv/XXX/ -d "rsync://storage-master@srv2.example.net/XXX-storage/" \
		|| 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

	# Petite vérification supplémentaire :
	# comme on ne semble pas pouvoir utiliser l'option --exec avec le --stop
	# de start-stop-daemon, on vérifie que le PID dans PID_FILE correspond bien
	# notre process
	PID_CHECK="$( pgrep -f "$DAEMON" )"
	if [ -z "$PID_CHECK" ] || [ "$PID_CHECK" != "$( cat "$PIDFILE" 2>/dev/null )" ]; then
		return 2
	fi

	# start-stop-daemon ne semble pas arrêter proprement le inotifywait qui reste
	# zombifié jusqu'à son timeout. Du coup, on commence par pkill
	pkill --signal INT -P "$PID_CHECK" || return 2
	if [ -n "$( pgrep -f "$DAEMON" )" ]; then
		start-stop-daemon --stop --quiet --retry=INT/5/KILL/5 --pidfile "$PIDFILE"
	fi

	RETVAL="$?"
	[ "$RETVAL" = 2 ] && return 2
	# Many daemons don't delete their pidfiles when they exit.
	rm -f $PIDFILE
	return "$RETVAL"
}

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)
	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|force-reload}" >&2
	exit 3
	;;
esac

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