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#!/bin/bash
# Copyright (c) 2010 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.
# Customizes a Chrome OS release image by setting /etc/lsb-release values.
# Load common constants and variables.
. "$(dirname "$0")/common.sh"
set_lsb_release_keyval() {
local rootfs=$1
local key=$2
local value=$3
local temp_lsb_release="$rootfs/etc/temp-lsb-release"
echo "$key=$value" | sudo tee "$temp_lsb_release" > /dev/null
grep -Ev "^$key=" "$rootfs/etc/lsb-release" \
| sudo tee -a "$temp_lsb_release" > /dev/null
sudo sort -o "$rootfs/etc/lsb-release" "$temp_lsb_release"
sudo rm -f "$temp_lsb_release"
restore_lsb_selinux "$rootfs/etc/lsb-release"
}
main() {
set -e
if [[ $(( $# % 2 )) -eq 0 ]]; then
cat <<EOF
Usage: $PROG <image.bin> [<key> <value> [<key> <value> ...]]
Examples:
$ $PROG chromiumos_image.bin
Dumps /etc/lsb-release from chromiumos_image.bin to stdout.
$ $PROG chromiumos_image.bin CHROMEOS_RELEASE_DESCRIPTION "New description"
Sets the CHROMEOS_RELEASE_DESCRIPTION key's value to "New description"
in /etc/lsb-release in chromiumos_image.bin, sorts the keys and dumps
the updated file to stdout.
EOF
exit 1
fi
local image=$1
shift
local loopdev=$(loopback_partscan "${image}")
local rootfs=$(make_temp_dir)
# If there are no key/value pairs to process, we don't need write access.
if [[ $# -eq 0 ]]; then
mount_loop_image_partition_ro "${loopdev}" 3 "${rootfs}"
else
mount_loop_image_partition "${loopdev}" 3 "${rootfs}"
touch "${image}" # Updates the image modification time.
fi
# Process all the key/value pairs.
local key value
while [[ $# -ne 0 ]]; do
key=$1 value=$2
shift 2
set_lsb_release_keyval "${rootfs}" "${key}" "${value}"
done
# Dump the final state.
cat "${rootfs}/etc/lsb-release"
# Dump security context for lsb-release file
getfattr -n security.selinux "${rootfs}/etc/lsb-release"
}
main "$@"
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