Bug 9250
| Summary: | xntpd should update the hardware clock upon shutdown | ||
|---|---|---|---|
| Product: | [Retired] Red Hat Linux | Reporter: | wingc |
| Component: | xntp3 | Assignee: | Jeff Johnson <jbj> |
| Status: | CLOSED WONTFIX | QA Contact: | |
| Severity: | medium | Docs Contact: | |
| Priority: | medium | ||
| Version: | 6.1 | Keywords: | FutureFeature |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | All | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Enhancement | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2000-02-09 17:46:28 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
This is the Right Thing To Do. Unfortunately, we can't supply this in the default configuration because of differences in the manner in which the hardware clock is set on dual-booting machines. This purely support issue is best dealt with by *not* trying to sync the system clock into hardware. |
It would be nice to update the hardware clock on the machine when xntpd shuts down. Many systems have incorrectly set hardware clocks and run xntpd. The result is that syslog has nonsense time for log entries immediately after startup, and then gets the correct time once xntpd starts. You could modify the init script for xntpd as follows: --- xntpd.rc.orig Tue Feb 8 17:42:23 2000 +++ xntpd.rc Tue Feb 8 17:42:23 2000 @@ -35,6 +59,58 @@ [ $RETVAL -eq 0 ] && touch /var/lock/subsys/xntpd ;; stop) + # save current system time to hardware clock, as time accuracy + # will only get worse from now on + + # taken from rh6.1 /etc/rc.d/rc.sysinit + ARC=0 + SRM=0 + UTC=0 + + + if [ -f /etc/sysconfig/clock ]; then + . /etc/sysconfig/clock + + # convert old style clock config to new values + if [ "${CLOCKMODE}" = "GMT" ]; then + UTC=true + elif [ "${CLOCKMODE}" = "ARC" ]; then + ARC=true + fi + fi + + if grep "system serial" /proc/cpuinfo | grep -q MILO ; then + ARC=true + fi + + CLOCKDEF="" + # write system time into hardware clock + CLOCKFLAGS="--systohc" + + case "$UTC" in + yes|true) + CLOCKFLAGS="$CLOCKFLAGS -u"; + CLOCKDEF="$CLOCKDEF (utc)"; + ;; + esac + + case "$ARC" in + yes|true) + CLOCKFLAGS="$CLOCKFLAGS -A"; + CLOCKDEF="$CLOCKDEF (arc)"; + ;; + esac + case "$SRM" in + yes|true) + CLOCKFLAGS="$CLOCKFLAGS -S"; + CLOCKDEF="$CLOCKDEF (srm)"; + ;; + esac + + /sbin/hwclock $CLOCKFLAGS + + action "Saving system time to hardware clock $CLOCKDEF: `date`" date + # Stop daemons. echo -n "Shutting down xntpd: " killproc xntpd Thanks, Chris Wing wingc.edu