#!/bin/bash

#

# ntpd		This shell script takes care of starting and stopping

#		ntpd (NTPv4 daemon).

#

# chkconfig: - 58 74

# description: ntpd is the NTPv4 daemon. \

# The Network Time Protocol (NTP) is used to synchronize the time of \

# a computer client or server to another server or reference time source, \

# such as a radio or satellite receiver or modem.

### BEGIN INIT INFO

# Provides: ntpd

# Required-Start: $network $local_fs $remote_fs

# Required-Stop: $network $local_fs $remote_fs

# Should-Start: $syslog $named

# Should-Stop: $syslog $named

# Short-Description: start and stop ntpd

# Description: ntpd is the NTPv4 daemon. The Network Time Protocol (NTP)

#              is used to synchronize the time of a computer client or

#              server to another server or reference time source, such

#              as a radio or satellite receiver or modem.

### END INIT INFO

# Source function library.

. /etc/init.d/functions

# Source networking configuration.

. /etc/sysconfig/network

if [ -f /etc/sysconfig/ntpd ];then

        . /etc/sysconfig/ntpd

fi

prog=ntpd

lockfile=/var/lock/subsys/$prog

ntpconf=/etc/ntp.conf

ntpstep=/etc/ntp/step-tickers

sync_hwclock() {

	ARC=0

	SRM=0

	UTC=0

	if [ -f /etc/sysconfig/clock ]; then

	   . /etc/sysconfig/clock

	   # convert old style clock config to new values

	   if [ "${CLOCKMODE}" = "GMT" ]; then

	      UTC=true

	   elif [ "${CLOCKMODE}" = "ARC" ]; then

	      ARC=true

	   fi

	fi

	CLOCKFLAGS="$CLOCKFLAGS --systohc"

	case "$UTC" in

	    yes|true)	CLOCKFLAGS="$CLOCKFLAGS --utc";;

	    no|false)	CLOCKFLAGS="$CLOCKFLAGS --localtime";;

	esac

	case "$ARC" in

	    yes|true)	CLOCKFLAGS="$CLOCKFLAGS --arc";;

	esac

	case "$SRM" in

	    yes|true)	CLOCKFLAGS="$CLOCKFLAGS --srm";;

	esac

	action $"Syncing hardware clock to system time" /sbin/hwclock $CLOCKFLAGS

}

readconf() {

	dostep=''

	dropstr=''

	hasg=''

	OPTIND=1

	while getopts ":46aAbc:dD:f:gi:I:k:l:LmnN:p:P:qr:s:t:u:U:v:V:x" args $OPTIONS;

	do 

	  case "$args" in

	    x) dostep=yes;;

	    c) ntpconf="$OPTARG";;

	    u) dropstr="-U $(echo $OPTARG | sed 's/:.*//')";;

	    g) hasg=yes;;

	  esac

	done

	tickers=''

	if [ -s "$ntpstep" ]; then

	    tickers=$(sed 's/#.*//' $ntpstep)

	    echo "$tickers" | grep -qi '[a-z0-9]' && dostep=yes || tickers=''

	fi

	if [ -n "$dostep" -a -z "$tickers" ]; then

	    # -x option is used, but step-tickers doesn't exist or contain

	    # anything useful, use servers from ntp.conf instead

	    tickers=$(awk '$1=="peer"||$1=="server"{print $2}' $ntpconf | \

	        egrep -v '127\.127\.[0-9]+\.[0-9]+')

	fi

}

start() {

	# Check that networking is up.

	[ "$NETWORKING" = "no" ] && exit 1

	[ -x /usr/sbin/ntpd ] || exit 5

	readconf;

	if [ -n "$dostep" ]; then

	    echo -n $"$prog: Synchronizing with time server: "

	    /usr/sbin/ntpdate $dropstr -s -b $NTPDATE_OPTIONS $tickers &>/dev/null

	    RETVAL=$?

	    [ $RETVAL -eq 0 ] && success || failure

	    echo

	    if [ $RETVAL -eq 0 ]; then

	        [ "$SYNC_HWCLOCK" = "yes" ] && sync_hwclock

	    elif [ -z "$hasg" ]; then

	        OPTIONS="$OPTIONS -g"

	    fi

	elif [ -z "$hasg" ]; then

	    # -g can replace the grep for time servers

	    # as it permits ntpd to violate its 1000s limit once.

	    OPTIONS="$OPTIONS -g"

	fi

        # Start daemons.

        echo -n $"Starting $prog: "

        daemon $prog $OPTIONS

	RETVAL=$?

        echo

	[ $RETVAL -eq 0 ] && touch $lockfile

	return $RETVAL

}

stop() {

        echo -n $"Shutting down $prog: "

	killproc $prog

	RETVAL=$?

        echo

	[ $RETVAL -eq 0 ] && rm -f $lockfile

	return $RETVAL

}

# See how we were called.

case "$1" in

  start)

	start

	;;

  stop)

	stop

	;;

  status)

	status $prog

	;;

  restart|force-reload)

	stop

	start

	;;

  try-restart|condrestart)

	if status $prog > /dev/null; then

	    stop

	    start

	fi

	;;

  reload)

	exit 3

	;;

  *)

	echo $"Usage: $0 {start|stop|status|restart|try-restart|force-reload}"

	exit 2

esac