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* `umount -f' causes lots of problems, so don't do it.

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svn path=/nixos/trunk/; revision=16688
This commit is contained in:
Eelco Dolstra 2009-08-11 21:08:05 +00:00
parent bd2fbcf9e5
commit bed6fd6a61
1 changed files with 24 additions and 19 deletions
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43
modules/system/upstart-events/halt.nix
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@ -25,22 +25,22 @@ let
# Set the hardware clock to the system time.
echo "Setting the hardware clock..."
hwclock --systohc --utc || true
echo "setting the hardware clock..."
hwclock --systohc --utc
# Do an initial sync just in case.
sync || true
sync
# Kill all remaining processes except init and this one.
echo "Sending the TERM signal to all processes..."
kill -TERM -1 || true
echo "sending the TERM signal to all processes..."
kill -TERM -1
sleep 1 # wait briefly
echo "Sending the KILL signal to all processes..."
kill -KILL -1 || true
echo "sending the KILL signal to all processes..."
kill -KILL -1
# Unmount helper functions.
@ -69,15 +69,18 @@ let
for mp in $(getMountPoints); do
device=$(getDevice $mp)
echo "unmounting $mp..."
# !!! Don't unmount /nix/store or /hostfs. This is
# a quick hack to cleanly shutdown VMs that mount
# the Nix store via CIFS. "mount -f" will actually
# work on such filesystems, which makes all commands
# needed below disappear.
if test "$mp" != /nix/store -a "$mp" != /hostfs && umount -f -n "$mp"; then
# Note: don't use `umount -f'; it's very buggy.
# (For instance, when applied to a bind-mount it
# unmounts the target of the bind-mount.) !!! But
# we should use `-f' for NFS.
if umount -n "$mp"; then
if test "$mp" != /; then tryAgain=1; fi
else
mount -n -o remount,ro "$mp" || true
# `-i' is to workaround a bug in mount.cifs (it
# doesn't recognise the `remount' option, and
# instead mounts the FS again).
mount -n -i -o remount,ro "$mp"
fi
# Hack: work around a bug in mount (mount -o remount on a
@ -85,23 +88,25 @@ let
# /etc/mtab).
if echo "$device" | grep -q '/dev/loop'; then
echo "removing loop device $device..."
losetup -d "$device" || true
losetup -d "$device"
fi
done
done
cat /proc/mounts
# Final sync.
sync || true
sync
# Either reboot or power-off the system. Note that the "halt"
# event also does a power-off.
if test ${event} = reboot; then
echo "rebooting..."
sleep 1
exec reboot -f
else
echo "powering off..."
sleep 1
exec halt -f -p
fi