[Bug 563618] Re: Ignoring a broken clock results in infinite reboots; not ignoring results in fsck failure; no solution to this problem

[Oliver Grawert]

ok, here a tested and properly working set of two script snippets of the
initramfs suggestion above:

ogra at ubuntu:~$ cat /usr/share/initramfs-tools/hooks/fixclock 
#!/bin/sh -e
# initramfs hook for fixclock

MINKVER="2.6.24"
PREREQ=""

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

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


. /usr/share/initramfs-tools/hook-functions

# We use date, hwclock and dumpe2fs
copy_exec /bin/date /bin
copy_exec /sbin/hwclock /sbin
copy_exec /sbin/dumpe2fs /sbin

ogra at ubuntu:~$ cat /usr/share/initramfs-tools/scripts/init-premount/fixclock 
#!/bin/sh -e
# initramfs init-top script for udev

PREREQ="udev"

# 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=""

for x in $(cat /proc/cmdline); do
        case ${x} in
        root=*)
                UUID=${x#*=}
                UUID="${UUID#*=}"
        ;;
        fixrtc)
                BROKEN_CLOCK=1
        ;;
        esac
done

if [ -n $BROKEN_CLOCK ];then
        ROOTDISK=$(readlink -f /dev/disk/by-uuid/$UUID)

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

        DISKYEAR=$(date -d "${TIME}" +%Y)
        CLOCKYEAR=$(date +%Y)

        if [ $DISKYEAR -gt $CLOCKYEAR ]; then
                hwclock --set --date="${TIME}"
                hwclock --hctosys
        fi
fi

-- 
Ignoring a broken clock results in infinite reboots; not ignoring results in fsck failure; no solution to this problem
https://bugs.launchpad.net/bugs/563618
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