forked from mirrors/nixpkgs
5b993b4ff5
NFS unmounts. We have to do this because networking is already down by the time we get to the unmounting. It would be better to unmount all remote file systems when an ip-down event occurs. svn path=/nixos/trunk/; revision=7620
81 lines
1.9 KiB
Nix
81 lines
1.9 KiB
Nix
{bash, event, utillinux}:
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assert event == "reboot"
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|| event == "halt"
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|| event == "system-halt"
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|| event == "power-off";
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{
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name = "sys-" + event;
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job = "
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start on ${event}
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script
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exec < /dev/tty1 > /dev/tty1 2>&1
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echo \"\"
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echo \"<<< SYSTEM SHUTDOWN >>>\"
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echo \"\"
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export PATH=${utillinux}/bin:${utillinux}/sbin:$PATH
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# Do an initial sync just in case.
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sync || true
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getMountPoints() {
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cat /proc/mounts \\
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| grep -v '^rootfs' \\
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| sed 's|^[^ ]\\+ \\+\\([^ ]\\+\\).*|\\1|' \\
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| grep -v '/proc\\|/sys\\|/dev'
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}
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getDevice() {
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local mountPoint=$1
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cat /proc/mounts \\
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| grep -v '^rootfs' \\
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| grep \"^[^ ]\\+ \\+$mountPoint \\+\" \\
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| sed 's|^\\([^ ]\\+\\).*|\\1|'
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}
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# Unmount file systems. We repeat this until no more file systems
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# can be unmounted. This is to handle loopback devices, file
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# systems mounted on other file systems and so on.
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tryAgain=1
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while test -n \"$tryAgain\"; do
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tryAgain=
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for mp in $(getMountPoints); do
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device=$(getDevice $mp)
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echo \"unmounting $mp...\"
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if umount -f -n \"$mp\"; then
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if test \"$mp\" != /; then tryAgain=1; fi
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else
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mount -n -o remount,ro \"$mp\"
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fi
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# Hack: work around a bug in mount (mount -o remount on a
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# loop device forgets the loop=/dev/loopN entry in
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# /etc/mtab).
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if echo \"$device\" | grep -q '/dev/loop'; then
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echo \"removing loop device $device...\"
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losetup -d \"$device\" || true
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fi
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done
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done
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cat /proc/mounts
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# Final sync.
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sync || true
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# Right now all events above power off the system.
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if test ${event} = reboot; then
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exec reboot -f
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else
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exec halt -f -p
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fi
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end script
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";
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}
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