Patrick Williams | b48b7b4 | 2016-08-17 15:04:38 -0500 | [diff] [blame^] | 1 | #!/bin/sh |
| 2 | |
| 3 | PATH=/sbin:/bin:/usr/bin:/usr/sbin |
| 4 | |
| 5 | test -x /usr/sbin/ntpdate || exit 0 |
| 6 | |
| 7 | if test -f /etc/default/ntpdate ; then |
| 8 | . /etc/default/ntpdate |
| 9 | fi |
| 10 | |
| 11 | if [ "$NTPSERVERS" = "" ] ; then |
| 12 | if [ "$METHOD" = "" -a "$1" != "silent" ] ; then |
| 13 | echo "Please set NTPSERVERS in /etc/default/ntpdate" |
| 14 | exit 1 |
| 15 | else |
| 16 | exit 0 |
| 17 | fi |
| 18 | fi |
| 19 | |
| 20 | # This is a heuristic: The idea is that if a static interface is brought |
| 21 | # up, that is a major event, and we can put in some extra effort to fix |
| 22 | # the system time. Feel free to change this, especially if you regularly |
| 23 | # bring up new network interfaces. |
| 24 | if [ "$METHOD" = static ]; then |
| 25 | OPTS="-b" |
| 26 | fi |
| 27 | |
| 28 | if [ "$METHOD" = loopback ]; then |
| 29 | exit 0 |
| 30 | fi |
| 31 | |
| 32 | ( |
| 33 | |
| 34 | LOCKFILE=/var/lock/ntpdate |
| 35 | |
| 36 | # Avoid running more than one at a time |
| 37 | if [ -x /usr/bin/lockfile-create ]; then |
| 38 | lockfile-create $LOCKFILE |
| 39 | lockfile-touch $LOCKFILE & |
| 40 | LOCKTOUCHPID="$!" |
| 41 | fi |
| 42 | |
| 43 | if /usr/sbin/ntpdate -s $OPTS $NTPSERVERS 2>/dev/null; then |
| 44 | if [ "$UPDATE_HWCLOCK" = "yes" ]; then |
| 45 | hwclock --systohc || : |
| 46 | fi |
| 47 | fi |
| 48 | |
| 49 | if [ -x /usr/bin/lockfile-create ] ; then |
| 50 | kill $LOCKTOUCHPID |
| 51 | lockfile-remove $LOCKFILE |
| 52 | fi |
| 53 | |
| 54 | ) & |