pre-start script
    # Check time stamps of custom and rootfs parts of the system
    # and adjust system clock if it is behind, to ensure apparmor cache
    # validation logic can validate precompiled profiles

    TIME_CUSTOM=$(cat /custom/build_id)
    TIME_ROOTFS=$(cat /etc/media-info | awk '{print $8}' | sed 's/\(-..\)\(..\)/\1:\2:/g;s/:$//;s/-/ /g;s/[)(]//g')
    TIME_ROOTFS=$(date --date="$TIME_ROOTFS" +%s)
    if [ $TIME_CUSTOM -ge $TIME_ROOTFS ]; then
        TIME_ROM=$TIME_CUSTOM
    else
        TIME_ROM=$TIME_ROOTFS
    fi
    TIME_NOW=$(date -d now +%s)
    if [ $TIME_ROM -ge $TIME_NOW ]; then
        echo "Current time is behind build stamp of customisation -> booting first time after factory, adjust time"
        date +%s -s @$TIME_ROM
        hwclock --set --date @$TIME_ROM
    fi
end script