#!/bin/sh
### BEGIN INIT INFO
# Provides:          gpsd
# Required-Start:    $remote_fs $network
# Should-Start:      bluetooth dbus udev
# Required-Stop:     $remote_fs $network
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: GPS (Global Positioning System) daemon start/stop script
# Description:       Start/Stop script for the gpsd service daemon,
#                    which is able to monitor one or more GPS devices
#                    connected to a host computer, making all data on
#                    the location and movements of the sensors available
#                    to be queried on TCP port 2947.
### END INIT INFO

# Author: Bernd Zeimetz <bzed@debian.org>
#
# Please remove the "Author" lines above and replace them
# with your own name if you copy and modify this script.

# 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="GPS (Global Positioning System) daemon"
NAME=gpsd
DAEMON=/usr/sbin/$NAME
PIDFILE=/var/run/$NAME.pid
SCRIPTNAME=/etc/init.d/$NAME

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

# Read configuration, if present
[ -r /etc/default/$NAME ] && . /etc/default/$NAME

if [ -z "$GPSD_SOCKET" ] && [ -z "$DEVICES" ]; then
	GPSD_SOCKET=/var/run/gpsd.sock
fi

if [ -n "$GPSD_SOCKET" ]; then
        GPSD_OPTIONS="$GPSD_OPTIONS -F $GPSD_SOCKET"
fi

#
# 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 --pidfile $PIDFILE --exec $DAEMON --test \
        -- $GPSD_OPTIONS -P $PIDFILE $GPS_DEVICES > /dev/null \
		|| return 1
	start-stop-daemon --start --quiet --pidfile $PIDFILE --exec $DAEMON -- \
		$GPSD_OPTIONS -P $PIDFILE $GPS_DEVICES \
		|| 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
	start-stop-daemon --stop --quiet --retry=TERM/30/KILL/5 --pidfile $PIDFILE --name $NAME
	RETVAL="$?"
	[ "$RETVAL" = 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)
		echo "Starting $DESC" "$NAME"
		do_start
		exit $?
	;;
  stop)
	echo "Stopping $DESC" "$NAME"
	do_stop
	exit $?
	;;
  status)
       ;;
  reload|force-reload)
	echo "Reloading $DESC" "$NAME"
	do_reload
	exit $?
	;;
  restart)
	#
	# If the "reload" option is implemented then remove the
	# 'force-reload' alias
	#
	echo "Restarting $DESC" "$NAME"
	do_stop
	case "$?" in
	  0|1)
		do_start
		exit $?
		;;
	  *)
	 	# Failed to stop
		exit 1
		;;
	esac
	;;
  *)
	echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
	exit 3
	;;
esac

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