login_manager/init/scripts/ui-collect-machine-info

#!/bin/sh

# Copyright 2016 The ChromiumOS Authors
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.

UI_MACHINE_INFO_FILE=/run/session_manager/machine-info

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

# Create an empty file so that we can simply append to it.
true > "${UI_MACHINE_INFO_FILE}"

# If we're on Flex, use the Flex state key as the re-enrollment key.
if command -v flex_id_tool >/dev/null; then
  echo "\"re_enrollment_key\"=\"$(flex_id_tool --type=state_key)\"" \
  >> "${UI_MACHINE_INFO_FILE}"
fi

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}"