1 #!/bin/bash 2 3 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved. 4 # Use of this source code is governed by a BSD-style license that can be 5 # found in the LICENSE file. 6 7 # Customizes a Chrome OS release image by setting /etc/lsb-release values. 8 9 # Load common constants and variables. 10 . "$(dirname "$0")/common.sh" 11 12 set_lsb_release_keyval() { 13 local rootfs=$1 14 local key=$2 15 local value=$3 16 local temp_lsb_release="$rootfs/etc/temp-lsb-release" 17 echo "$key=$value" | sudo tee "$temp_lsb_release" > /dev/null 18 grep -Ev "^$key=" "$rootfs/etc/lsb-release" \ 19 | sudo tee -a "$temp_lsb_release" > /dev/null 20 sudo sort -o "$rootfs/etc/lsb-release" "$temp_lsb_release" 21 sudo rm -f "$temp_lsb_release" 22 } 23 24 main() { 25 set -e 26 27 if [[ $(( $# % 2 )) -eq 0 ]]; then 28 cat <<EOF 29 Usage: $PROG <image.bin> [<key> <value> [<key> <value> ...]] 30 31 Examples: 32 33 $ $PROG chromiumos_image.bin 34 35 Dumps /etc/lsb-release from chromiumos_image.bin to stdout. 36 37 $ $PROG chromiumos_image.bin CHROMEOS_RELEASE_DESCRIPTION "New description" 38 39 Sets the CHROMEOS_RELEASE_DESCRIPTION key's value to "New description" 40 in /etc/lsb-release in chromiumos_image.bin, sorts the keys and dumps 41 the updated file to stdout. 42 43 EOF 44 exit 1 45 fi 46 47 local image=$1 48 shift 49 local rootfs=$(make_temp_dir) 50 51 # If there are no key/value pairs to process, we don't need write access. 52 if [[ $# -eq 0 ]]; then 53 mount_image_partition_ro "${image}" 3 "${rootfs}" 54 else 55 mount_image_partition "${image}" 3 "${rootfs}" 56 touch "${image}" # Updates the image modification time. 57 fi 58 59 # Process all the key/value pairs. 60 local key value 61 while [[ $# -ne 0 ]]; do 62 key=$1 value=$2 63 shift 2 64 set_lsb_release_keyval "${rootfs}" "${key}" "${value}" 65 done 66 67 # Dump the final state. 68 cat "${rootfs}/etc/lsb-release" 69 } 70 71 main "$@" 72
