/etc/init.d/ntpd

✔️ CentOS 5.7에서 테스트하였습니다.
1 ntpd[ | ]

#!/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 syntaxhighlight, \
# such as a radio or satellite receiver or modem.

# Source function library.
. /etc/init.d/functions

# Source networking configuration.
. /etc/sysconfig/network

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 ":46aAbc:dD:f:gi:k:l:LnN: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 /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() {
        # Check that networking is up.
        [ "$NETWORKING" = "no" ] && exit 1

        readconf;

        if [ -n "$dostep" ]; then
            echo -n $"$prog: Synchronizing with time server: "
            /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
            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}"
        RETVAL=3
esac

exit $RETVAL
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