#! /bin/bash
# Copyright (c) 2011 Olav Reinert
# All rights reserved.
#
# /etc/init.d/motion
#
# LSB compatible service control script; see http://www.linuxbase.org/spec/
# 
# Note: This script uses functions rc_XXX defined in /etc/rc.status on
# UnitedLinux (UL) based Linux distributions. If you want to base your 
# script on this template and ensure that it works on non UL based LSB 
# compliant Linux distributions, you either have to provide the rc.status
# functions from UL or change the script to work without them.

### BEGIN INIT INFO
# Provides:          motion
# Required-Start:    $syslog $remote_fs
# Required-Stop:     $syslog $remote_fs
# Default-Start:     3 5
# Default-Stop:      0 1 2 6
# Short-Description: Simple video surveillance system
# Description: Motion is a software motion detector. It grabs images from
#  video4linux devices and/or from webcams (such as the axis network cameras).
### END INIT INFO


# Note on runlevels: 
# 0 - halt/poweroff 			6 - reboot
# 1 - single user			2 - multiuser without network exported
# 3 - multiuser w/ network (text mode)  5 - multiuser w/ network and X11 (xdm)
# 
# Note on script names:
# http://www.linuxbase.org/spec/refspecs/LSB_1.2.0/gLSB/scrptnames.html
# A registry has been set up to manage the init script namespace.
# http://www.lanana.org/
# Please use the names already registered or register one or use a
# vendor prefix.


# Check for missing binaries (stale symlinks should not happen)
MOTION_BIN=/usr/bin/motion
test -x $MOTION_BIN || exit 5

# Check for existence of needed config file
MOTION_CONFIG=/etc/motion.conf
test -r $MOTION_CONFIG || exit 6

# Check for existence of sysconfig file, then load it
test -r /etc/sysconfig/motion || exit 6
. /etc/sysconfig/motion

# Source LSB init functions
# providing start_daemon, killproc, pidofproc, 
# log_success_msg, log_failure_msg and log_warning_msg.
# This is currently not used by UnitedLinux based distributions and
# not needed for init scripts for UnitedLinux only. If it is used,
# the functions from rc.status should not be sourced or used.
#. /lib/lsb/init-functions

# Shell functions sourced from /etc/rc.status:
#      rc_check         check and set local and overall rc status
#      rc_status        check and set local and overall rc status
#      rc_status -v     be verbose in local rc status and clear it afterwards
#      rc_status -v -r  ditto and clear both the local and overall rc status
#      rc_status -s     display "skipped" and exit with status 3
#      rc_status -u     display "unused" and exit with status 3
#      rc_failed        set local and overall rc status to failed
#      rc_failed <num>  set local and overall rc status to <num>
#      rc_reset         clear both the local and overall rc status
#      rc_exit          exit appropriate to overall rc status
#      rc_active        checks whether a service is activated by symlinks
#      rc_splash arg    sets the boot splash screen to arg (if active)
. /etc/rc.status

# Reset status of this service
rc_reset

# Return values acc. to LSB for all commands but status:
# 0	  - success
# 1       - generic or unspecified error
# 2       - invalid or excess argument(s)
# 3       - unimplemented feature (e.g. "reload")
# 4       - user had insufficient privileges
# 5       - program is not installed
# 6       - program is not configured
# 7       - program is not running
# 8--199  - reserved (8--99 LSB, 100--149 distrib, 150--199 appl)
# 
# Note that starting an already running service, stopping
# or restarting a not-running service as well as the restart
# with force-reload (in case signaling is not supported) are
# considered a success.

case "$1" in
    start)
	echo -n "Starting motion "
	checkproc ${MOTION_BIN}
	case $? in
                0) echo -n "- Warning: motion already running! " ;;
                1) echo -n "- Warning: ${MOTION_PID} exists! " ;;
        esac
	umask 027
	startproc -u motion -g motion -e ${MOTION_BIN} >/var/log/motion-start.log 2>&1
	rc_status -v
	;;
    try-start)
        checkproc ${MOTION_BIN}
	case $? in
	    0) rc_status ;;
	    *) $0 start; ;;
	esac
	;;
    stop)
	echo -n "Shutting down motion "
	killproc -TERM $MOTION_BIN >/dev/null 2>&1

	# Remember status and be verbose
	rc_status -v
	;;
    reload|try-restart)
	$0 status >/dev/null &&  $0 restart
	rc_status
	;;
    restart)
	$0 stop
	$0 start
	rc_status
	;;
    status)
	echo -n "Checking for service motion "
	checkproc ${MOTION_BIN}
	rc_status -v
	;;
    *)
	echo "Usage: $0 {start|try-start|stop|status|try-restart|restart}"
	exit 1
	;;
esac
rc_exit
