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#!/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="" # System partition is currently used by ubuntu touch only SYSTEMPART="" # shellcheck disable=SC2013 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 ;; systempart=*) value=${x#*=} # Find the device node path depending on the form of root= : case ${value} in UUID=*) SYSTEMPART=/dev/disk/by-uuid/${value#UUID=} ;; LABEL=*) SYSTEMPART=/dev/disk/by-label/${value#LABEL=} ;; *) SYSTEMPART=${value} ;; esac # if systempart= is defined we do not want root=/dev/ram # been taken into account [ "$ROOTDEV" = "/dev/ram" ] && ROOTDEV="" ;; fixrtc) BROKEN_CLOCK=1 ;; esac done # Touch devices might not have a valid 'root', so use system part if available if [ -z "$ROOTDEV" ] && [ -n "$SYSTEMPART" ]; then ROOTDEV=$SYSTEMPART fi if [ -n "$BROKEN_CLOCK" ] && [ -n "$ROOTDEV" ]; then # need udev settle for /dev/disk/by-* symlinks to be added udevadm settle wait-for-root "$ROOTDEV" "${ROOTDELAY:-180}" ROOTDISK=$(readlink -f "$ROOTDEV") MOUNTDATESTR=$(dumpe2fs -h "$ROOTDISK" 2>/dev/null|grep "Last mount time") # Trim whitespace for busybox MOUNTDATE="${MOUNTDATESTR#*:}" MOUNTDATE="${MOUNTDATE#${MOUNTDATE%%[![:space:]]*}}" CREATEDATESTR=$(dumpe2fs -h "$ROOTDISK" 2>/dev/null|grep "Filesystem created") || true # Trim whitespace for busybox CREATEDATE="${CREATEDATESTR#*:}" CREATEDATE="${CREATEDATE#${CREATEDATE%%[![:space:]]*}}" # Hide stderr to avoid ugly message: # can't open '/dev/misc/rtc': No such file or directory # on pi2 (and possible more PIs) where there is no /dev/rtc of # any kind. We still need to keep this call because we use # fixrtc on all armhf images. hwclock -s 2>/dev/null || true # make sure we're also compatible with busybox, if available DATE="/bin/date -D%c" date -D%c 2>/dev/null || DATE=/bin/date if [ "$MOUNTDATE" = "n/a" ]; then # some versions of mkfs set n/a now, date is not happy with this so # let us use some half way sane epoch instead MOUNTDATE="Fri Jan 1 00:00:00 1999" fi TIMESTR=$MOUNTDATE TIME=$(${DATE} --utc --date "${TIMESTR}" +%s) CURTIME=$(${DATE} --utc +%s) # in case the created time is newer than last mount, use that instead if [ -n "$CREATEDATE" ]; then CREATETIME=$(${DATE} --utc --date "${CREATEDATE}" +%s) if [ "$CREATETIME" -gt "$TIME" ]; then TIMESTR=$CREATEDATE TIME=$CREATETIME fi fi if [ "$TIME" -gt "$CURTIME" ]; then ${DATE} --set="${TIMESTR} 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