#! /bin/sh
### BEGIN INIT INFO
# Provides:          historien
# Required-Start:    $remote_fs $syslog
# Required-Stop:     $remote_fs $syslog
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: historien, le bot IRC
# Description:       historien est un bot IRC codé par 20-100
#                    Il joue à donner des dates
### END INIT INFO

# Author: Vincent Le Gallic <legallic@crans.org>

# 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="bot IRC history-quizz"
PYTHON=/usr/bin/python
BASENAME=historien
DIRECTORY=/home/historien/historien
SCRIPT=$DIRECTORY/$BASENAME.py
EXEC="$PYTHON $SCRIPT"
USER=historien
SCRIPT_ARGS="crans --daemon"
PIDDIR=/var/run/bots/
PIDFILE=$PIDDIR$BASENAME.pid
SCRIPTNAME=/etc/init.d/$BASENAME


# 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

_repair()
{
	# Répare /var/run/bots si il était pas bon
	mkdir -p $PIDDIR
	chown root:bots $PIDDIR
	chmod g+w $PIDDIR
}

# To check if the process is running
_check_is_running()
{
	# On récupère le PID (écrit dans ce fichier par le script la dernière fois qu'il a été lancé)
	pid=`cat $PIDFILE`
	# On va voir si le process tourne toujours
	test -x /proc/$pid || return 1 # aucun process de ce PID ne tourne
	# On regarde si il a les bons arguments
	egrep -q ^$PYTHON /proc/$pid/cmdline || return 1 # il y a bien un process de ce PID, mais ce n'est pas python
	grep -q $SCRIPT /proc/$pid/cmdline || return 1 # il y a bien un PID, c'est bien python, mais il ne lance pas le bot
	return 0
}

_is_running()
{
	test -x $PIDDIR
        if [ $? -ne 0 ]
        then
		_repair
	fi
	if test -f $PIDFILE
	then
		_check_is_running
		return $?
	else
		touch $PIDFILE 2>&1 >/dev/null
		chown $USER:bots $PIDFILE 2>&1 >/dev/null
		if test -f $PIDFILE
		then
			_check_is_running
			return $?
		else
			echo -n "Failed to read $PIDFILE"
			return 0
		fi
	fi
}
#
# Function that starts the daemon
#
do_start()
{
	# Return
	#   0 if daemon has been started
	#   1 if daemon was already running
	#   2 if daemon could not be started
	if _is_running
	then
		return 1
	else
		sudo -u $USER $PYTHON $SCRIPT $SCRIPT_ARGS
		[ "$?" = 0 ] || return 2
	fi
}

#
# Function that stops the daemon
#
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
	if _is_running
	then
		pid=`cat $PIDFILE`
		kill -15 $pid
		if [ "$?" = 0 ]
		then
			return 0
		else
			sleep 10
			kill -9 $pid
		fi
	else
		return 1
	fi
}

#
# Function that sends a SIGHUP to the daemon
#
do_reload() {
	# Return
	#   0 if reload has been done
	#   1 if daemon was not running
	#   2 if reload could not be achieved
	if _is_running
	then
		pid=`cat $PIDFILE`
		kill -1 $pid
		[ "$?" = 0 ] || return 2
	else
		return 1
	fi
}

#
# The actual initscript
#
case "$1" in
  start)
	log_daemon_msg "Starting $DESC" "$BASENAME"
	do_start
	case "$?" in
		0) log_end_msg 0 ;;
		1) echo -n " was already running"; log_end_msg 1 ;;
		2) log_end_msg 1 ;;
	esac
	;;
  stop)
	log_daemon_msg "Stopping $DESC" "$BASENAME"
	do_stop
	case "$?" in
		0) log_end_msg 0 ;;
		1) echo -n " was not running"; log_end_msg 1 ;;
		2) log_end_msg 1 ;;
	esac
	;;
  status)
	if _is_running
	then
		log_action_msg "$BASENAME is running"
	else
		log_action_msg "$BASENAME is NOT running"
	fi
	;;
  reload|force-reload)
	log_daemon_msg "Reloading $DESC" "$BASENAME"
	do_reload
	case "$?" in
		0) log_end_msg 0 ;;
		1) echo -n " was not running"; log_end_msg 1 ;;
		2) log_end_msg 1;;
	esac
	;;
  restart)
	log_daemon_msg "Restarting $DESC" "$BASENAME"
	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
	;;
  running)
	if _is_running
	then
		echo "Running"
	else
		echo "Not running"
	fi
	;;
  *)
	log_action_msg "Usage: $SCRIPTNAME {start|stop|status|restart|reload|force-reload}" >&2
	exit 3
	;;
esac

true