# Copyright 2016 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.

description   "Remove stale ARC directories."
author        "chromium-os-dev@chromium.org"

start on started arc-remove-data or arc-booted

# Stop the job on 'stopping ui' because once ui is stopped, ARC data files
# in the user's home directory will not be accessible anyway.
stop on stopping ui

import CHROMEOS_USER

script
  {
    set -u
    echo "Start arc-stale-directory-remover"

    user_root_path="$(cryptohome-path system $CHROMEOS_USER)"
    # Ensure the user directory exists
    if [ ! -d "$user_root_path" ]; then
        echo "<3> ${user_root_path} doesn't exist"
        exit 1
    fi

    android_data_old_dir="${user_root_path}"/android-data-old

    if [ -d "$android_data_old_dir" ]; then
      # Remove contents of the directory, /home/root/<hash>/android-data-old/.
      # Note that this script does not remove the directory itself to ensure
      # that arc-remove-data.conf always works regardless of whether this
      # script is running. Also note that the directory does not have any dot
      # files and hence "/*" always matches all entries in the directory.
      nice rm -rf "$android_data_old_dir"/*
    fi
    echo "Done."
  } 2>&1 | logger --prio-prefix -t "${UPSTART_JOB}"
end script