Patrick Williams | c124f4f | 2015-09-15 14:41:29 -0500 | [diff] [blame] | 1 | #!/bin/sh |
| 2 | ### BEGIN INIT INFO |
| 3 | # Provides: hwclock |
| 4 | # Required-Start: |
| 5 | # Required-Stop: $local_fs |
| 6 | # Default-Start: S |
| 7 | # Default-Stop: 0 6 |
| 8 | # Short-Description: Set system clock |
| 9 | # Description: Set system clock to hardware clock, according to the UTC |
| 10 | # setting in /etc/default/rcS (see also rcS(5)). |
| 11 | ### END INIT INFO |
| 12 | # |
| 13 | # WARNING: If your hardware clock is not in UTC/GMT, this script |
| 14 | # must know the local time zone. This information is |
| 15 | # stored in /etc/localtime. This might be a problem if |
| 16 | # your /etc/localtime is a symlink to something in |
| 17 | # /usr/share/zoneinfo AND /usr isn't in the root |
| 18 | # partition! The workaround is to define TZ either |
| 19 | # in /etc/default/rcS, or in the proper place below. |
| 20 | |
| 21 | [ ! -x /sbin/hwclock ] && exit 0 |
| 22 | |
| 23 | [ -f /etc/default/rcS ] && . /etc/default/rcS |
| 24 | |
| 25 | [ "$UTC" = "yes" ] && tz="--utc" || tz="--localtime" |
| 26 | case "$1" in |
| 27 | start) |
| 28 | if [ "$VERBOSE" != no ] |
| 29 | then |
| 30 | echo "System time was `date`." |
| 31 | echo "Setting the System Clock using the Hardware Clock as reference..." |
| 32 | fi |
| 33 | |
| 34 | if [ "$HWCLOCKACCESS" != no ] |
| 35 | then |
| 36 | if [ -z "$TZ" ] |
| 37 | then |
| 38 | hwclock $tz --hctosys |
| 39 | else |
| 40 | TZ="$TZ" hwclock $tz --hctosys |
| 41 | fi |
| 42 | fi |
| 43 | |
| 44 | if [ "$VERBOSE" != no ] |
| 45 | then |
| 46 | echo "System Clock set. System local time is now `date`." |
| 47 | fi |
| 48 | ;; |
| 49 | stop|restart|reload|force-reload) |
| 50 | # |
| 51 | # Updates the Hardware Clock with the System Clock time. |
| 52 | # This will *override* any changes made to the Hardware Clock. |
| 53 | # |
| 54 | # WARNING: If you disable this, any changes to the system |
| 55 | # clock will not be carried across reboots. |
| 56 | # |
| 57 | if [ "$VERBOSE" != no ] |
| 58 | then |
| 59 | echo "Saving the System Clock time to the Hardware Clock..." |
| 60 | fi |
| 61 | if [ "$HWCLOCKACCESS" != no ] |
| 62 | then |
| 63 | hwclock $tz --systohc |
| 64 | fi |
| 65 | if [ "$VERBOSE" != no ] |
| 66 | then |
| 67 | echo "Hardware Clock updated to `date`." |
| 68 | fi |
| 69 | exit 0 |
| 70 | ;; |
| 71 | show) |
| 72 | if [ "$HWCLOCKACCESS" != no ] |
| 73 | then |
| 74 | hwclock $tz --show |
| 75 | fi |
| 76 | ;; |
| 77 | *) |
| 78 | echo "Usage: hwclock.sh {start|stop|show|reload|restart}" >&2 |
| 79 | echo " start sets kernel (system) clock from hardware (RTC) clock" >&2 |
| 80 | echo " stop and reload set hardware (RTC) clock from kernel (system) clock" >&2 |
| 81 | exit 1 |
| 82 | ;; |
| 83 | esac |