a5c433696c
shutdown. (Portmap and statd are needed during shutdown to unmount NFS volumes but have open files in /var/run.) * In the shutdown job, don't kill PIDs belonging to Upstart jobs that are still running. If they don't stop on the "starting shutdown" event, then they're needed during shutdown (such as portmap and statd). * NFS test: test whether the shutdown quickly unmounts NFS volumes (i.e. whether portmap and statd are still running). svn path=/nixos/branches/boot-order/; revision=22204
146 lines
4.5 KiB
Nix
146 lines
4.5 KiB
Nix
{ config, pkgs, ... }:
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with pkgs.lib;
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{
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jobs.shutdown =
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{ name = "shutdown";
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task = true;
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stopOn = ""; # must override the default ("starting shutdown")
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environment = { MODE = "poweroff"; };
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extraConfig = "console owner";
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script =
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''
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set +e # continue in case of errors
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${pkgs.kbd}/bin/chvt 1
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exec < /dev/console > /dev/console 2>&1
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echo ""
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if test "$MODE" = maintenance; then
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echo "[1;32m<<< Entering maintenance mode >>>[0m"
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else
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echo "[1;32m<<< System shutdown >>>[0m"
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fi
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echo ""
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export PATH=${pkgs.utillinux}/bin:${pkgs.utillinux}/sbin:$PATH
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# Do an initial sync just in case.
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sync
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# Kill all remaining processes except init, this one and any
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# Upstart jobs that don't stop on the "starting shutdown"
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# event, as these are necessary to complete the shutdown.
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omittedPids=$(initctl list | sed -e 's/.*process \([0-9]\+\)/-o \1/;t;d')
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#echo "saved PIDs: $omittedPids"
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echo "sending the TERM signal to all processes..."
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${pkgs.sysvtools}/bin/killall5 -15 $job $omittedPids
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sleep 1 # wait briefly
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echo "sending the KILL signal to all processes..."
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${pkgs.sysvtools}/bin/killall5 -9 $job $omittedPids
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# If maintenance mode is requested, start a root shell, and
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# afterwards emit the "startup" event to bring everything
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# back up.
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if test "$MODE" = maintenance; then
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echo ""
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echo "[1;32m<<< Maintenance shell >>>[0m"
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echo ""
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${pkgs.shadow}/bin/login root
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initctl emit -n startup
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exit 0
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fi
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# Write a shutdown record to wtmp while /var/log is still writable.
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reboot --wtmp-only
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# Set the hardware clock to the system time.
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echo "setting the hardware clock..."
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hwclock --systohc --utc
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# Stop all swap devices.
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swapoff -a
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# Unmount file systems. We repeat this until no more file systems
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# can be unmounted. This is to handle loopback devices, file
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# systems mounted on other file systems and so on.
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tryAgain=1
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while test -n "$tryAgain"; do
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tryAgain=
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failed= # list of mount points that couldn't be unmounted/remounted
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cp /proc/mounts /dev/.mounts # don't read /proc/mounts while it's changing
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exec 4< /dev/.mounts
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while read -u 4 device mp fstype options rest; do
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if [ "$mp" = /proc -o "$mp" = /sys -o "$mp" = /dev -o "$device" = "rootfs" -o "$mp" = /var/run ]; then continue; fi
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echo "unmounting $mp..."
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# We need to remount,ro before attempting any
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# umount, or bind mounts may get confused, with
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# the fs not being properly flushed at the end.
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# `-i' is to workaround a bug in mount.cifs (it
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# doesn't recognise the `remount' option, and
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# instead mounts the FS again).
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success=
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if mount -t "$fstype" -n -i -o remount,ro "device" "$mp"; then success=1; fi
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# Note: don't use `umount -f'; it's very buggy.
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# (For instance, when applied to a bind-mount it
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# unmounts the target of the bind-mount.) !!! But
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# we should use `-f' for NFS.
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if [ "$mp" != / -a "$mp" != /nix/store ]; then
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if umount -n "$mp"; then success=1; tryAgain=1; fi
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fi
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if [ -z "$success" ]; then failed="$failed $mp"; fi
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done
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done
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# Warn about filesystems that could not be unmounted or
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# remounted read-only.
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if [ -n "$failed" ]; then
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echo "[1;31mwarning:[0m the following filesystems could not be unmounted:"
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for mp in $failed; do echo " $mp"; done
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sleep 5
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fi
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# Final sync.
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sync
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# Either reboot or power-off the system.
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if test "$MODE" = reboot; then
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echo "rebooting..."
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sleep 1
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exec reboot -f
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else
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echo "powering off..."
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sleep 1
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exec halt -f -p
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fi
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'';
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};
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}
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