login_manager/init/ui-collect-machine-info.conf

# Copyright 2014 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   "Collect machine information for session_manager"
author        "chromium-os-dev@chromium.org"

# This job collects machine information and places it in a file. It is
# then pushed to session_manager by ui-init-late.

# Start after the system is mostly up and running, which also implies
# that the VPD has been read and the udev database is fully initialized.
start on started system-services

env UI_MACHINE_INFO_FILE=/var/run/session_manager/machine-info

script
  (
    # Just continue if one of the commands below fails.
    set +e

    # Grab full VPD data from dump_vpd_log, which contains the machine
    # serial number and echo group code.
    #
    # TODO(mnissler): As things stand, dump_vpd_log prints error
    # messages on stdout in some situations, so only emit its output on
    # clean termination. Simplify this after http://crbug.com/369188 is
    # fixed.
    VPD_DATA=$(dump_vpd_log --full --stdout)
    [ $? -eq 0 ] && echo "${VPD_DATA}"

    # Grab the disk serial number from the udev database.
    ROOTDEV=$(rootdev -s -d || true)
    udevadm info --query=property --name="${ROOTDEV}" |
        awk -F = '/^ID_SERIAL=/ { print "root_disk_serial_number=" $2 }'
  ) > "${UI_MACHINE_INFO_FILE}"
end script