chromeos_shutdown

#!/bin/sh

# Copyright (c) 2011 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

# Shutdown is best-effort. We don't want to die on errors.
set +e

logevent() {
  local event=shutdown-$1
  local metricsfile=/var/log/metrics/shutdown_${1}
  local metricslist="time read-sectors write-sectors"
  bootstat $event
  bootstat_get_last $event $metricslist > $metricsfile
}

# Measure shutdown time. /var/log/metrics is created by chromeos_startup.
logevent start

# Sync the system clock to the hardware clock.
hwclock --systohc --utc --noadjfile &
HWCLOCK_PID=$!

. /sbin/killers

# Remount root in case a developer has remounted it rw for some reason.
mount -n -o remount,ro /

# TODO: swapoff as necessary.

# Kill any that may prevent us from unmounting the stateful partition
# or the crypto-home and then unmount. These should be all that we need
# to unmount for a clean shutdown.
kill_with_open_files_on /mnt/stateful_partition /home/chronos /var

# join hwclock setting, already in progress.
wait $HWCLOCK_PID

# Measure shutdown time
logevent stop

# Signal that the clean shutdown point was reached (or at least as
# close to that point as we can be before stateful is unmounted).
/sbin/crash_reporter --clean_shutdown

# Lazy umount the tmpfs dirs under /var so we can immediately umount it.
umount -n -l /var/run /var/lock
if [ -e /dev/mapper/encstateful ]; then
  mount-encrypted umount >/tmp/umount-encrypted.log 2>&1
  if [ $? -ne 0 ] ; then
    mv /tmp/umount-encrypted.log /mnt/stateful_partition/
  fi
  umount -n /usr/local /home /mnt/stateful_partition
  rc=$?
else
  umount -n /var /usr/local /home /mnt/stateful_partition
  rc=$?
fi
if [ $rc -ne 0 ] ; then
  mount > /mnt/stateful_partition/shutdown_stateful_umount_failure
fi

# Just in case something didn't unmount properly above.
sync

# Display low battery icon if shutting down due to low battery.
# SHUTDOWN_REASON is passed in with the runlevel event from power manager.
if [ "$SHUTDOWN_REASON" = "low-battery" ]; then
  display_low_battery_alert
fi

# Ensure that we always claim success.
exit 0