arc/setup/init/arc-sdcard.conf

# Copyright 2018 The ChromiumOS Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

description   "Set up esdfs directories"
author        "chromium-os-dev@chromium.org"

# The job is started from arc-setup's OnBootContinue().
# Stop on stopping ui to avoid mount leaks in the login screen (b/288954735).
stop on stop-arc-instance or stopping ui

# The job does not have script/exec stanza, so it is considered running forever
# once started until explicitly stopped.
# See: http://upstart.ubuntu.com/cookbook/#jobs-that-run-forever
import CHROMEOS_USER
import CONTAINER_PID

# Use 'never' since terminating this job fails ARC to start.
oom score never

pre-start script
  {
    echo "Pre-start arc-sdcard"
    set -x
    # Start the actual mounting process in a separate job. This allows
    # arc-setup --mode=mount-sdcard to be interrupted cleanly if the container
    # terminates.
    exec start arc-sdcard-mount "CHROMEOS_USER=${CHROMEOS_USER}" \
        "CONTAINER_PID=${CONTAINER_PID}"
  } 2>&1 | logger -t "${UPSTART_JOB}"
end script

post-stop script
  {
    echo "Post-stop arc-sdcard"
    set -x +e
    # The arc-sdcard-mount job might still be running. Ensure it dies so that
    # the next container invocation can continue cleanly.
    stop arc-sdcard-mount
    find "/sys/kernel/config/sdcardfs/" -mindepth 1 -maxdepth 1 \
        -type d -not -name 'extensions' -exec rmdir {} \+
  } 2>&1 | logger -t "${UPSTART_JOB}"
  exec /usr/sbin/arc-setup --mode=unmount-sdcard "--log_tag=${UPSTART_JOB}"
end script