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#!/bin/sh /etc/rc.common
# Copyright (C) 2013-2014 OpenWrt.org

START=00
STOP=90

RTC_DEV=/dev/rtc0
HWCLOCK=/sbin/hwclock

boot() {
        start && exit 0

        local maxtime="$(maxtime)"
        local curtime="$(date +%s)"
        [ $curtime -lt $maxtime ] && date -s @$maxtime
}

start() {
        [ -e "$RTC_DEV" ] && [ -e "$HWCLOCK" ] && $HWCLOCK -s -u -f $RTC_DEV
}

stop() {
        [ -e "$RTC_DEV" ] && [ -e "$HWCLOCK" ] && $HWCLOCK -w -u -f $RTC_DEV && \
                logger -t sysfixtime "saved '$(date)' to $RTC_DEV"
}

maxtime() {
        local file newest

        for file in $( find /etc -type f ) ; do
                [ -z "$newest" -o "$newest" -ot "$file" ] && newest=$file
        done
        [ "$newest" ] && date -r "$newest" +%s
}