# 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.

description   "Send boot stats after login prompt is visible"
author        "chromium-os-dev@chromium.org"

# This script is primarily responsible for sending boot time statistics
# after we finish booting.  Completion of this job is also the key
# to starting the 'system-services' job.  This job needs to run first
# because the amount of work that starts with 'system-services' could
# otherwise delay the 'bootstat' timestamp, and make boot time
# measurements less reliable.

# Note, the 'start on' line is modified by chromeos-factoryinstall.ebuild
# and mod_for_factory.  Please do not change without also changing
# those references.
# TODO(jrbarnette) The external dependencies that edit this line should
# be eliminated.
start on login-prompt-visible

script
  # The login-prompt-visible signal is emitted every time the login
  # screen is displayed.  The check below makes sure boot stats are
  # reported only once per boot.
  if [ -n "$(bootstat_get_last boot-complete)" ]; then
    exit 0
  fi

  bootstat boot-complete

  # If ureadahead is still running, then presumably it's performing
  # a boot trace.  We only care about tracing until login prompt, so
  # stop the process now.
  #
  # We have to ignore the return status in case ureadahead has
  # already completed, because pkill helpfully exits with a non-zero
  # status when no process was found.
  pkill '^ureadahead$' || true

  # Report boot time and disk usage metrics to UMA.
  send_boot_metrics &
end script