136 lines
4.2 KiB
Bash
Executable File
136 lines
4.2 KiB
Bash
Executable File
#!/bin/sh -e
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# initramfs local-premount script for fixrtc
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PREREQ=""
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# Output pre-requisites
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prereqs()
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{
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echo "$PREREQ"
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}
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case "$1" in
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prereqs)
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prereqs
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exit 0
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;;
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esac
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# use the fixrtc cmdline option in your bootloader to
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# automatically set the hardware clock to the date of
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# the last mount of your root filesystem to avoid fsck
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# to get confused by the superblock being in the future
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BROKEN_CLOCK=""
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ROOTDEV=""
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# System partition is currently used by ubuntu touch only
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SYSTEMPART=""
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# shellcheck disable=SC2013
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for x in $(cat /proc/cmdline); do
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case ${x} in
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root=*)
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value=${x#*=}
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# Find the device node path depending on the form of root= :
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case ${value} in
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UUID=*)
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ROOTDEV=/dev/disk/by-uuid/${value#UUID=}
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;;
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LABEL=*)
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ROOTDEV=/dev/disk/by-label/${value#LABEL=}
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;;
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*)
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ROOTDEV=${value}
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;;
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esac
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;;
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systempart=*)
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value=${x#*=}
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# Find the device node path depending on the form of root= :
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case ${value} in
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UUID=*)
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SYSTEMPART=/dev/disk/by-uuid/${value#UUID=}
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;;
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LABEL=*)
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SYSTEMPART=/dev/disk/by-label/${value#LABEL=}
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;;
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*)
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SYSTEMPART=${value}
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;;
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esac
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# if systempart= is defined we do not want root=/dev/ram
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# been taken into account
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[ "$ROOTDEV" = "/dev/ram" ] && ROOTDEV=""
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;;
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fixrtc)
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BROKEN_CLOCK=1
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;;
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esac
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done
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# Touch devices might not have a valid 'root', so use system part if available
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if [ -z "$ROOTDEV" ] && [ -n "$SYSTEMPART" ]; then
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ROOTDEV=$SYSTEMPART
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fi
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if [ -n "$BROKEN_CLOCK" ] && [ -n "$ROOTDEV" ]; then
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# need udev settle for /dev/disk/by-* symlinks to be added
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udevadm settle
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wait-for-root "$ROOTDEV" "${ROOTDELAY:-180}" >/dev/null
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ROOTDISK=$(readlink -f "$ROOTDEV")
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MOUNTDATESTR=$(dumpe2fs -h "$ROOTDISK" 2>/dev/null|grep "Last mount time")
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# Trim whitespace for busybox
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MOUNTDATE="${MOUNTDATESTR#*:}"
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MOUNTDATE="${MOUNTDATE#"${MOUNTDATE%%[![:space:]]*}"}"
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CREATEDATESTR=$(dumpe2fs -h "$ROOTDISK" 2>/dev/null|grep "Filesystem created") || true
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# Trim whitespace for busybox
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CREATEDATE="${CREATEDATESTR#*:}"
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CREATEDATE="${CREATEDATE#"${CREATEDATE%%[![:space:]]*}"}"
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# Hide stderr to avoid ugly message:
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# can't open '/dev/misc/rtc': No such file or directory
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# on pi2 (and possible more PIs) where there is no /dev/rtc of
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# any kind. We still need to keep this call because we use
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# fixrtc on all armhf images.
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hwclock -s 2>/dev/null || true
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# make sure we're also compatible with busybox, if available
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DATE="/bin/date -D%c"
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date -D%c 2>/dev/null 2>&1 || DATE=/bin/date
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if [ "$MOUNTDATE" = "n/a" ]; then
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# some versions of mkfs set n/a now, date is not happy with this so
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# let us use some half way sane epoch instead
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MOUNTDATE="Fri Jan 1 00:00:00 1999"
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fi
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TIMESTR=$MOUNTDATE
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TIME=$(${DATE} --utc --date "${TIMESTR}" +%s)
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CURTIME=$(${DATE} --utc +%s)
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# in case the created time is newer than last mount, use that instead
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if [ -n "$CREATEDATE" ]; then
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CREATETIME=$(${DATE} --utc --date "${CREATEDATE}" +%s)
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if [ "$CREATETIME" -gt "$TIME" ]; then
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TIMESTR=$CREATEDATE
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TIME=$CREATETIME
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fi
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fi
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if [ "$TIME" -gt "$CURTIME" ]; then
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${DATE} --set="${TIMESTR} 1 minute" >/dev/null 2>&1
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fi
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fi
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# This script is best-effort. If we couldn't fudge the clock as desired,
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# just try to carry on boot anyway:
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# It will probably fail, but we won't have made the situation any worse.
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exit 0
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