#!/bin/bash## gpsd	This shell script starts and stops gpsd.## chkconfig: 345 90 40# description: Gpsd manages access to a serial- or USB-connected GPS# processname: gpsd# If you must specify a non-NMEA driver, uncomment and modify the next line#GPSD_OPTS=# Source function library.. /etc/rc.d/init.d/functionsRETVAL=0prog="gpsd"start() {	# Start daemons.	echo -n "Starting $prog: "	# We don't use the daemon function here because of a known bug	# in initlog -- it spuriously returns a nonzero status when 	# starting daemons that fork themselves.  See	# http://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=130629	# for discussion.  Fortunately:	#	# 1. gpsd startup can't fail, or at least not in the absence of	# much larger resource-exhaustion problems that would be very obvious.	#	# 2. We don't need all the logging crud that daemon/initlog sets	# up -- gpsd does its own syslog calls.	#	if [ -e "/dev/gps" ]	then	    gpsd ${GPSD_OPTS} -p /dev/gps	    success	else	    # User needs to symlink /dev/gps to the right thing	    failure "No /dev/gps device, aborting gpsd startup."	fi	RETVAL=$?	echo	[ $RETVAL -eq 0 ] && touch /var/lock/subsys/gpsd	return $RETVAL}stop() {	# Stop daemons.	echo -n "Shutting down $prog: "        killproc gpsd	RETVAL=$?	echo	if [ $RETVAL -eq 0 ]	then	    rm -f /var/lock/subsys/gpsd;	fi	return $RETVAL}# See how we were called.case "$1" in  start)	start	;;  stop)	stop	;;  restart|reload)	stop	start	RETVAL=$?	;;  condrestart)	if [ -f /var/lock/subsys/gpsd ]; then	    stop	    start	    RETVAL=$?	fi	;;  status)	status gpsd	RETVAL=$?	;;  *)	echo "Usage: $0 {start|stop|restart|condrestart|status}"	exit 1esacexit $RETVAL