#!/bin/sh
# -*- coding: utf-8  -*-
################################################################################
#
#  Rattail -- Retail Software Framework
#  Copyright © 2010-2012 Lance Edgar
#
#  This file is part of Rattail.
#
#  Rattail is free software: you can redistribute it and/or modify it under the
#  terms of the GNU Affero General Public License as published by the Free
#  Software Foundation, either version 3 of the License, or (at your option)
#  any later version.
#
#  Rattail is distributed in the hope that it will be useful, but WITHOUT ANY
#  WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
#  FOR A PARTICULAR PURPOSE.  See the GNU Affero General Public License for
#  more details.
#
#  You should have received a copy of the GNU Affero General Public License
#  along with Rattail.  If not, see <http://www.gnu.org/licenses/>.
#
################################################################################


# This script is mostly based on the ``/etc/init.d/skeleton`` file from a
# Debian 6 system.


DESC=${DESC:-"Rattail File Monitor"}
NAME=${NAME:-"rattail-filemon"}
SCRIPTNAME=${SCRIPTNAME:-"/etc/init.d/$NAME"}
PIDFILE=${PIDFILE:-"/var/run/rattail/$NAME.pid"}

PYTHON=${PYTHON:-"/usr/bin/python"}
RATTAIL=${RATTAIL:-"/usr/local/bin/rattail"}
RATTAIL_ARGS=${RATTAIL_ARGS:-""}
FILEMON_ARGS=${FILEMON_ARGS:-"--pidfile=$PIDFILE"}

USER=${USER:-"rattail"}
GROUP=${GROUP:-"rattail"}


# Read configuration variable files if present.
[ -r /etc/default/rattail ] && . /etc/default/rattail
[ -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


create_pid_dir() {
    PIDDIR=`dirname "$PIDFILE"`
    if [ ! -d "$PIDDIR" ]; then
        mkdir --parents "$PIDDIR"
    fi
    chown $USER:$GROUP "$PIDDIR"
}


#
# 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
    create_pid_dir
    start-stop-daemon --start --pidfile $PIDFILE --exec $PYTHON --user $USER --test --quiet > /dev/null \
        || return 1
    start-stop-daemon --start --pidfile $PIDFILE --exec $PYTHON --startas $RATTAIL --chuid $USER --group $GROUP --quiet -- \
        $RATTAIL_ARGS filemon $FILEMON_ARGS start \
        || 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
    $RATTAIL $RATTAIL_ARGS filemon $FILEMON_ARGS stop > /dev/null 2>&1
}


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) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
	esac
	;;
  status)
       status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $?
       ;;
  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|status|restart|force-reload}" >&2
	exit 3
	;;
esac

:
