#!/bin/sh -e
# initramfs local-premount script for fixrtc

PREREQ=""

# Output pre-requisites
prereqs()
{
echo "$PREREQ"
}

case "$1" in
prereqs)
prereqs
exit 0
;;
esac

# use the fixrtc cmdline option in your bootloader to
# automatically set the hardware clock to the date of
# the last mount of your root filesystem to avoid fsck
# to get confused by the superblock being in the future

BROKEN_CLOCK=""
ROOTDEV=""

for x in $(cat /proc/cmdline); do
case ${x} in
root=*)
value=${x#*=}

# Find the device node path depending on the form of root= :

case ${value} in
UUID=*)
ROOTDEV=/dev/disk/by-uuid/${value#UUID=}
;;
LABEL=*)
ROOTDEV=/dev/disk/by-label/${value#LABEL=}
;;
*)
ROOTDEV=${value}
;;
esac
;;
fixrtc)
BROKEN_CLOCK=1
;;
esac
done

if [ -n "$BROKEN_CLOCK" -a -n "$ROOTDEV" ];then
ROOTDISK=$(readlink -f "$ROOTDEV")

TIMESTR=$(dumpe2fs -h "$ROOTDISK" 2>/dev/null|grep "Last mount time")
TIME=${TIMESTR#*:}

hwclock -s

MOUNTTIME=$(date --utc --date "${TIME}" +%s)
CURDATE=$(date --utc --date "$(date)" +%s)

if [ "$MOUNTTIME" -gt "$CURDATE" ]; then
date --set="${TIME} 1 minute" >/dev/null 2>&1
fi
fi

# This script is best-effort. If we couldn't fudge the clock as desired,
# just try to carry on boot anyway:
# It will probably fail, but we won't have made the situation any worse.
exit 0