#!/bin/sh
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PATH=/sbin:/bin:/usr/bin:/usr/sbin
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test -x /usr/sbin/ntpdate || exit 0
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if test -f /etc/default/ntpdate ; then
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. /etc/default/ntpdate
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fi
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if [ "$NTPSERVERS" = "" ] ; then
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if [ "$METHOD" = "" -a "$1" != "silent" ] ; then
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echo "Please set NTPSERVERS in /etc/default/ntpdate"
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exit 1
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else
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exit 0
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fi
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fi
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# This is a heuristic: The idea is that if a static interface is brought
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# up, that is a major event, and we can put in some extra effort to fix
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# the system time. Feel free to change this, especially if you regularly
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# bring up new network interfaces.
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if [ "$METHOD" = static ]; then
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OPTS="-b"
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fi
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if [ "$METHOD" = loopback ]; then
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exit 0
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fi
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(
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LOCKFILE=/var/lock/ntpdate
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# Avoid running more than one at a time
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if [ -x /usr/bin/lockfile-create ]; then
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lockfile-create $LOCKFILE
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lockfile-touch $LOCKFILE &
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LOCKTOUCHPID="$!"
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fi
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if /usr/sbin/ntpdate -s $OPTS $NTPSERVERS 2>/dev/null; then
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if [ "$UPDATE_HWCLOCK" = "yes" ]; then
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hwclock --systohc || :
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fi
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fi
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if [ -x /usr/bin/lockfile-create ] ; then
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kill $LOCKTOUCHPID
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lockfile-remove $LOCKFILE
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fi
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) &
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# wait for all subprocesses to finish
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# this is required when using systemd service as ntpd will start before ntpdate finishes
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# and results in a bind error (port 123)
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wait
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