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base-files: For sysfixtime use hwclock if RTC available

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On systems that have an RTC prefer it to the file-based time fixup (i.e.
use hwclock when there is a permanent clock instead of the faked up time
logic that is needed when there is not RTC).

We can't rely on hctosys kernel feature either as we're usually using
RTC as kernel modules which are usually being loaded after hctosys was
run, leading in the following error:

  hctosys: unable to open rtc device (rtc0)

Signed-off-by: Daniel Dickinson <openwrt@daniel.thecshore.com>
Signed-off-by: Petr Štetiar <ynezz@true.cz>

SVN-Revision: 48661
This commit is contained in:
John Crispin 2016-02-08 08:25:53 +00:00
parent badeccf6a8
commit e2fd1adaf5
1 changed files with 14 additions and 0 deletions
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14
package/base-files/files/etc/init.d/sysfixtime
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@ -2,10 +2,24 @@
# Copyright (C) 2013-2014 OpenWrt.org # Copyright (C) 2013-2014 OpenWrt.org
START=00 START=00
STOP=90
RTC_DEV=/dev/rtc0
HWCLOCK=/sbin/hwclock
boot() { boot() {
start && exit 0
local curtime="$(date +%s)" local curtime="$(date +%s)"
local maxtime="$(find /etc -type f -exec date -r {} +%s \; | sort -nr | head -n1)" local maxtime="$(find /etc -type f -exec date -r {} +%s \; | sort -nr | head -n1)"
[ $curtime -lt $maxtime ] && date -s @$maxtime [ $curtime -lt $maxtime ] && date -s @$maxtime
} }
start() {
[ -e "$RTC_DEV" ] && [ -e "$HWCLOCK" ] && $HWCLOCK -s -f $RTC_DEV
}
stop() {
[ -e "$RTC_DEV" ] && [ -e "$HWCLOCK" ] && $HWCLOCK -w -f $RTC_DEV && \
logger -t sysfixtime "saved '$(date)' to $RTC_DEV"
}