factory-utils: add factory scripts from crosutils (copy only)

mk_memento_images_factory.sh

Index: mk_memento_images_factory.sh
diff --git a/mk_memento_images_factory.sh b/mk_memento_images_factory.sh
new file mode 100755
index 0000000000000000000000000000000000000000..c74cb50f203c1b4d3a7b521395b73590226c6196
--- /dev/null
+++ b/mk_memento_images_factory.sh
@@ -0,0 +1,135 @@
+#!/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.
+
+# This script takes a path to a rootfs.ext2 which was generated by
+# build_image.sh and generates an image that can be used for auto
+# update.
+
+set -e
+
+# --- BEGIN COMMON.SH BOILERPLATE ---
+# Load common CrOS utilities.  Inside the chroot this file is installed in
+# /usr/lib/crosutils.  Outside the chroot we find it relative to the script's
+# location.
+find_common_sh() {
+  local common_paths=(/usr/lib/crosutils $(dirname "$(readlink -f "$0")"))
+  local path
+
+  SCRIPT_ROOT=
+  for path in "${common_paths[@]}"; do
+    if [ -r "${path}/common.sh" ]; then
+      SCRIPT_ROOT=${path}
+      break
+    fi
+  done
+}
+
+find_common_sh
+. "${SCRIPT_ROOT}/common.sh" || (echo "Unable to load common.sh" && exit 1)
+# --- END COMMON.SH BOILERPLATE ---
+
+# Load functions designed for image processing
+if ! . "${SCRIPT_ROOT}/lib/cros_image_common.sh"; then
+  echo "ERROR: Cannot load required library: lib/cros_image_common.sh; Abort."
+  exit 1
+fi
+
+if [ -z "$2" -o -z "$1" ] || [ "${#@}" -ne 2 -a "${#@}" -ne 3 ]; then
+  echo "usage: $0 path/to/kernel_partition_img path/to/rootfs_partition_img"
+  echo "    or $0 path/to/chromiumos_img kern_part_no rootfs_part_no"
+  exit 1
+fi
+
+if [ "$CROS_GENERATE_UPDATE_PAYLOAD_CALLED" != "1" ]; then
+  echo "WARNING:"
+  echo " This script should only be called from cros_generate_update_payload"
+  echo " Please run that script with --help to see how to use it."
+fi
+
+if ! image_has_command pigz; then
+  (echo "WARNING:"
+   echo " Your system does not have pigz (parallel gzip) installed."
+   echo " COMPRESSING WILL BE VERY SLOW. It is recommended to install pigz"
+   if image_has_command apt-get; then
+     echo " by 'sudo apt-get install pigz'."
+   elif image_has_command emerge; then
+     echo  " by 'sudo emerge pigz'."
+   fi) >&2
+fi
+
+if [ $(whoami) = "root" ]; then
+  echo "running $0 as root which is unneccessary"
+fi
+
+# Determine the offset size, and file name of parameters
+if [ -z "$3" ]; then
+  # kernnel_img rootfs_img
+  KPART="$1"
+  ROOT_PART="$2"
+  KPART_SIZE=$(stat -c%s "$KPART")
+  ROOT_PART_SIZE=$(stat -c%s "$ROOT_PART")
+  KPART_OFFSET=0
+  KPART_SECTORS=$((KPART_SIZE / 512))
+  ROOT_OFFSET=0
+  ROOT_SECTORS=$((ROOT_PART_SIZE / 512))
+else
+  # chromiumos_img kern_part_no rootfs_part_no
+  KPART="$1"
+  ROOT_PART="$1"
+  KPART_OFFSET="$(image_part_offset "$KPART" "$2")" ||
+    image_die "cannot retieve kernel partition offset"
+  KPART_SECTORS="$(image_part_size "$KPART" "$2")" ||
+    image_die "cannot retieve kernel partition size"
+  ROOT_OFFSET="$(image_part_offset "$ROOT_PART" "$3")" ||
+    image_die "cannot retieve root partition offset"
+  ROOT_SECTORS="$(image_part_size "$ROOT_PART" "$3")" ||
+    image_die "cannot retieve root partition size"
+  KPART_SIZE=$((KPART_SECTORS * 512))
+fi
+
+# Sanity check size.
+if [ "$KPART_SIZE" -gt $((16 * 1024 * 1024)) ]; then
+  echo "Kernel partition size ($KPART_SIZE bytes) greater than 16 MiB."
+  echo "That's too big."
+  exit 1
+fi
+
+FINAL_OUT_FILE=$(dirname "$1")/update.gz
+
+# Update payload format:
+#  [kernel_size: big-endian uint64][kernel_blob][rootfs_blob]
+
+# Prepare kernel_size by using printf as a number like 00000000003d0900, then
+# sed to convert as: \x00\x00\x00\x00\x00\x3d\x09\x00, finally echo -e to
+# convert into binary.
+KPART_SIZE_SIGNATURE="$(printf "%016x" "$KPART_SIZE" |
+                        sed 's/\([0-9a-f][0-9a-f]\)/\\x\1/g')"
+
+# Build the blob!
+CS_AND_RET_CODES="$(
+  (echo -en "$KPART_SIZE_SIGNATURE"
+    echo "Compressing kernel..." >&2
+    image_dump_partial_file "$KPART" "$KPART_OFFSET" "$KPART_SECTORS"
+    echo "Compressing rootfs..." >&2
+    image_dump_partial_file "$ROOT_PART" "$ROOT_OFFSET" "$ROOT_SECTORS") |
+  image_gzip_compress -c -9 |
+  tee "$FINAL_OUT_FILE" |
+  openssl sha1 -binary |
+  openssl base64 |
+  tr '\n' ' '
+  echo ${PIPESTATUS[*]})"
+
+EXPECTED_RET_CODES="0 0 0 0 0 0"
+set -- $CS_AND_RET_CODES
+CALC_CS="$1"
+shift
+RET_CODES="$@"
+if [ "$RET_CODES" != "$EXPECTED_RET_CODES" ]; then
+  echo compression/hash failed. $RET_CODES
+  exit 1
+fi
+
+echo Success. hash is "$CALC_CS"