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Old 12-14-2009, 02:26 AM
Dan McGee
 
Default rc.sysinit: add and clarify clock comments

Signed-off-by: Dan McGee <dan@archlinux.org>
---
rc.sysinit | 18 +++++++++++++++---
1 files changed, 15 insertions(+), 3 deletions(-)

diff --git a/rc.sysinit b/rc.sysinit
index e948074..c09dad2 100755
--- a/rc.sysinit
+++ b/rc.sysinit
@@ -54,8 +54,14 @@ if [ -n "$HWCLOCK_PARAMS" ]; then
/bin/ln -s /dev/rtc0 /dev/rtc
fi

- # Set clock early to fix some bugs with filesystem checks
- # Clock is set again later to match rc.conf
+ # Do a clock set here for a few reasons:
+ # 1. Make creation time on udev nodes sane (FS#8665)
+ # 2. Filesystem checks can depend on system time
+ # 3. This will set the clock, if using non-UTC, off the last known
+ # configured timezone. Any new timezone put in rc.conf is copied over at
+ # a later time.
+ # This does *NOT* take into account a time adjustment file as /var may not be
+ # mounted yet. A second set occurs later to match rc.conf.
if [ -f /etc/localtime ]; then
/sbin/hwclock $HWCLOCK_PARAMS --noadjfile
fi
@@ -283,8 +289,14 @@ fi

clock_pid=""
if [ -n "$HWCLOCK_PARAMS" ]; then
+ # This time, we set the clock for real. Use the adjustment file now that
+ # /var will definitely be available, and then set the system clock once
+ # the hardware clock has been adjusted accordingly. The backgrounding magic
+ # is due to the fact that the second call to hwclock will almost always
+ # take ~1 second because of the clock granularity, and we might as well
+ # stay busy.
(
- /sbin/hwclock --adjust #Adjust for system drift
+ /sbin/hwclock --adjust
/sbin/hwclock $HWCLOCK_PARAMS
) &
clock_pid=$!
--
1.6.5.5
 

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