mod_for_test_scripts/000recordRootFsSize

#!/bin/bash

# Copyright (c) 2009 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.
#
# Record the original size of the image without modifications from
# mod_image_for_test.sh, for reporting and monitoring through autotest.

# Record the size, but don't overwrite the file as its existence indicates
# that this image is not a production image.
echo "Recording production image size."
FILE="${ROOT_FS_DIR}/root/bytes-rootfs-prod"
if [[ ! -f "${FILE}"  ]]; then
  # This will complain it cannot find a valid mtab so keep it quiet.
  # Grep for rootfs mount at end of line otherwise we will get rootfs/var
  # mount point as well.
  df -B1 -P 2>/dev/null | grep "${ROOT_FS_DIR}$" | awk '{ print $3 }' > \
      "${FILE}"
else
  echo "  Not modifying existing ${FILE}."
fi