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#!/bin/sh
PATH=/sbin:/bin:/usr/bin
test -x /usr/bin/ntpdate || exit 0
if test -f /etc/default/ntpdate ; then
. /etc/default/ntpdate
else
NTPSERVERS="pool.ntp.org"
fi
test -n "$NTPSERVERS" || exit 0
# This is a heuristic: The idea is that if a static interface is brought
# up, that is a major event, and we can put in some extra effort to fix
# the system time. Feel free to change this, especially if you regularly
# bring up new network interfaces.
if [ "$METHOD" = static ]; then
OPTS="-b"
fi
if [ "$METHOD" = loopback ]; then
exit 0
fi
(
LOCKFILE=/var/lock/ntpdate
# Avoid running more than one at a time
if [ -x /usr/bin/lockfile-create ]; then
lockfile-create $LOCKFILE
lockfile-touch $LOCKFILE &
LOCKTOUCHPID="$!"
fi
if /usr/bin/ntpdate -s $OPTS $NTPSERVERS 2>/dev/null; then
if [ "$UPDATE_HWCLOCK" = "yes" ]; then
hwclock --systohc || :
fi
fi
if [ -x /usr/bin/lockfile-create ] ; then
kill $LOCKTOUCHPID
lockfile-remove $LOCKFILE
fi
) &
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