#!/bin/bash

PATH=/sbin:/bin:/usr/sbin:/usr/bin

# 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

# Check whether ntpdate was removed but not purged; it's useless to wait for 
# it in that case.
if [ ! -x /usr/sbin/ntpdate-debian ] && [ -d /usr/sbin ]; then
	exit 0
fi

(
# This is for the case that /usr will be mounted later.
if [ -r /lib/udev/hotplug.functions ]; then
	. /lib/udev/hotplug.functions
	wait_for_file /usr/sbin/ntpdate-debian
fi

exec {fd}<$0

#LOCKFILE=/var/lock/ntpdate
## Avoid running more than one at a time
#if [ -x /usr/bin/lockfile-create ]; then
#	lockfile-create --retry 0 $LOCKFILE || exit 1
#	lockfile-touch $LOCKFILE &
#	LOCKTOUCHPID="$!"
#fi

flock -n -x $fd || {
    exit 1
}

sleep 20
/usr/sbin/ntpdate-debian -s $OPTS 2>/dev/null
NTPDATE_RESULT=$?

if [ $NTPDATE_RESULT -eq 0 ]; then
	hwclock -w
	fake-hwclock save force
	echo "Set ntpdate"
	sleep 600
fi

#if [ -x /usr/bin/lockfile-create ] ; then
#	kill $LOCKTOUCHPID
#	lockfile-remove $LOCKFILE
#fi

) &
