ntp-4.2.4p7: invoke ntpdate using if-up.d, not an init script

* provide an if-up.d script for ntpdate (based on Debian's)
* remove invocation of update-rc.d busybox-cron, this should
  definitely not be part of the ntpdate package

1 files changed, 45 insertions, 0 deletions

diff --git a/recipes/ntp/ntp-4.2.4p7/ntpdate b/recipes/ntp/ntp-4.2.4p7/ntpdate
new file mode 100755
index 0000000000..5b139ed1ed
--- /dev/null
+++ b/recipes/ntp/ntp-4.2.4p7/ntpdate
@@ -0,0 +1,45 @@
+#!/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
+
+/usr/bin/ntpdate -s $OPTS $NTPSERVERS 2>/dev/null || :
+
+if [ -x /usr/bin/lockfile-create ] ; then
+	kill $LOCKTOUCHPID
+	lockfile-remove $LOCKFILE
+fi
+
+) &