#!/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.
# Source function library.
. /etc/init.d/functions
# Source networking configuration.
. /etc/sysconfig/network
# Check that networking is up.
[ ${NETWORKING} = "no" ] && exit 0
if [ -f /etc/sysconfig/ntpd ];then
. /etc/sysconfig/ntpd
fi
ntpconf=/etc/ntp.conf
ntpstep=/etc/ntp/step-tickers
RETVAL=0
prog="ntpd"
sync_hwclock() {
ARC=0
SRM=0
UTC=0
if [ -f /etc/sysconfig/clock ]; then
. /etc/sysconfig/clock
# convert old style clock config to new values
if [ "${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=''
OPTIND=1
while getopts ":aAbc:dD:f:gi:k:l:LmnN:p:P:qr:s:t:u:v:V:x" args $OPTIONS;
do
case "$args" in
x) dostep=yes;;
c) ntpconf="$OPTARG";;
u) dropstr="-U $(echo $OPTARG | sed 's/:.*//')";;
esac
done
[ -x /usr/sbin/ntpd -a -f $ntpconf ] || exit 0
tickers=''
if [ -s "$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}' $ntpconf | \
fgrep -v 127.127.1.0)
fi
}
start() {
readconf;
if [ -n "$dostep" ]; then
echo -n $"$prog: Synchronizing with time server: "
/usr/sbin/ntpdate $dropstr -s -b $tickers 2>/dev/null >/dev/null
RETVAL=$?
[ $RETVAL -eq 0 ] && success || failure
echo
if [ $RETVAL -eq 0 ]; then
[ "$SYNC_HWCLOCK" = "yes" ] && sync_hwclock
else
OPTIONS="$OPTIONS -g"
fi
else
# -g can replace the grep for time servers
# as it permits ntpd to violate its 1000s limit once.
OPTIONS="$OPTIONS -g"
fi
# Start daemons.
echo -n $"Starting $prog: "
daemon ntpd $OPTIONS
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && touch /var/lock/subsys/ntpd
return $RETVAL
}
stop() {
echo -n $"Shutting down $prog: "
killproc ntpd
RETVAL=$?
echo
[ $RETVAL -eq 0 ] && rm -f /var/lock/subsys/ntpd
return $RETVAL
}
# See how we were called.
case "$1" in
start)
start
;;
stop)
stop
;;
status)
status ntpd
RETVAL=$?
;;
restart|reload)
stop
start
RETVAL=$?
;;
condrestart)
if [ -f /var/lock/subsys/ntpd ]; then
stop
start
RETVAL=$?
fi
;;
*)
echo $"Usage: $0 {start|stop|restart|condrestart|status}"
exit 1
esac
exit $RETVAL