debian.sh

#! /bin/sh
### BEGIN INIT INFO
# Provides:           piglow-ambient
# Required-Start:     $remote_fs $syslog
# Required-Stop:      $remote_fs $syslog
# Default-Start:      2 3 4 5
# Default-Stop:       0 1 6
# Short-Description:  PiGlow Ambient
# Description:        Background lighting for when it gets dark
### END INIT INFO

# Author: Kevin Valk <kevin@kevinvalk.nl>

# PATH should only include /usr/* if it runs after the mountnfs.sh script
PATH=/usr/local/bin:$PATH
NAME=piglow-ambient
DESC="Background lighting for when it gets dark"
PIDFILE=/var/run/$NAME.pid
SCRIPTNAME=/etc/init.d/$NAME
DAEMON=/usr/local/bin/$NAME
DAEMON_ARGS="--logfile=/var/log/$NAME.log --pidfile=$PIDFILE"

# 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
		start-stop-daemon --start --quiet -b --pidfile $PIDFILE --exec $DAEMON --test > /dev/null \
				|| return 1
		start-stop-daemon --start --quiet -b --pidfile $PIDFILE --exec $DAEMON -- \
				$DAEMON_ARGS \
				|| return 2
		# Add code here, if necessary, that waits for the process to be ready
		# to handle requests from services started subsequently which depend
		# on this one.  As a last resort, sleep for some time.
}

#
# 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 --quiet --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 --quiet --oknodo --retry=0/30/KILL/5 --exec $DAEMON
		[ "$?" = 2 ] && return 2
		# 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) [ "$VERBOSE" != no ] && log_end_msg 1 ;;
		esac
		;;
  status)
		status_of_proc "$DAEMON" "$NAME" && exit 0 || exit $?
		;;
  reload|force-reload)
		log_daemon_msg "Reloading $DESC" "$NAME"
		do_reload
		log_end_msg $?
		;;
  restart)
		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|reload}" >&2
		exit 3
		;;
esac

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