arc/scripts/arc-stale-directory-remover.conf

# 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

# Note: This job is used by both ARC and ARCVM.
script
  do_removal() {
      if [ -d "$1" ]; then
          echo "Removing $1"
          # Remove contents of the directory.
          # 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 "$1"/*
      fi
  }
  {
    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

    if grep -qs "1" /run/chrome/is_arcvm; then
        # On ARCVM, stale *.odex files are kept in /data/vendor/arc.
        do_removal \
            "${user_root_path}"/android-data/data/vendor/arc/old_arc_executables_pre_ota \
            || true
    fi

    # Remove unnecessary /data directories (and for ARC, stale *.odex files
    # too.)
    do_removal "${user_root_path}"/android-data-old

    echo "Done."
  } 2>&1 | logger --prio-prefix -t "${UPSTART_JOB}"
end script