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|
#!/bin/sh
echo shutdown: "$@"
export PS1="shutdown-sh# "
# exec bin/sh
cd /
if [ ! -e /proc/mounts ]
then
mkdir -p /proc
mount proc /proc -tproc
umount_proc=1
else
umount_proc=
fi
# Remove an empty oldroot, that means we are not invoked from systemd-shutdown
rmdir /oldroot 2>/dev/null
# Move /oldroot/run to /mnt in case it has the underlying rofs loop mounted.
# Reverse sort order will ensure the overlay is unmounted before the loop mount
mkdir -p /mnt
mount --move /oldroot/run /mnt
# Unmount paths with /oldroot /mnt under / and those ending with ro or rw
# Use . to match any single character because busybox awk doesn't handle [/]
awk '$2 ~ /^.oldroot|^.mnt|.r[ow]$/ { print $2 }' < /proc/mounts | sort -r | while IFS= read -r f
do
echo "Unmounting $f"
umount "$f"
done
update=/run/initramfs/update
image=/run/initramfs/image-
wdt="-t 1 -T 5"
wdrst="-T 15"
if ls $image* > /dev/null 2>&1
then
if test -x $update
then
if test -c /dev/watchdog
then
echo Pinging watchdog ${wdt+with args $wdt}
# shellcheck disable=SC2086
watchdog $wdt -F /dev/watchdog &
wd=$!
else
wd=
fi
$update --clean-saved-files
remaining=$(ls $image*)
if test -n "$remaining"
then
echo 1>&2 "Flash update failed to flash these images:"
echo 1>&2 "$remaining"
else
echo "Flash update completed."
fi
if test -n "$wd"
then
kill -9 $wd
if test -n "$wdrst"
then
echo "Resetting watchdog timeouts to $wdrst"
# shellcheck disable=SC2086
watchdog $wdrst -F /dev/watchdog &
sleep 1
# Kill the watchdog daemon, setting a timeout
# for the remaining shutdown work
kill -9 $!
fi
fi
else
echo 1>&2 "Flash update requested but $update program missing!"
fi
fi
echo Remaining mounts:
cat /proc/mounts
test "$umount_proc" && umount /proc && rmdir /proc
# tcsattr(tty, TIOCDRAIN, mode) to drain tty messages to console
test -t 1 && stty cooked 0<&1
# Execute the command systemd told us to ...
if test -d /oldroot && test "$1"
then
if test "$1" = kexec
then
$1 -f -e
else
$1 -f
fi
fi
echo "Execute ${1-reboot} -f if all unmounted ok, or exec /init"
export PS1=shutdown-sh#\
exec /bin/sh
|
