AU: make mk_memento_images not change rootfs

mk_memento_images.sh

 #!/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
 
 if [ -z "$2" -o -z "$1" ]; then
   echo "usage: $0 path/to/kernel_partition_img path/to/rootfs_partition_img"
   exit 1
 fi
 
+if [ "$CROS_GENERATE_UPDATE_PAYLOAD_CALLED" != "1" ]; then

[Nick Sanders, 2010/08/16 22:28:59]

Please don't check this in, it will break the factory installer.

+  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."
+  exit 1
+fi
+
 if [ $(whoami) = "root" ]; then
   echo "running $0 as root which is unneccessary"
 fi
 
 KPART="$1"
 ROOT_PART="$2"
 
 KPART_SIZE=$(stat -c%s "$KPART")
 
 # Sanity check size.
@@ skipping 16 matching lines @@
 
 # Next, write kernel partition to the out file
 cat "$KPART" >> "$UNCOMPRESSED_OUT_FILE"
 
 # Sanity check size of output file now
 if [ $(stat -c%s "$UNCOMPRESSED_OUT_FILE") -ne $((8 + $KPART_SIZE)) ]; then
   echo "Kernel partition changed size during image generation. Aborting."
   exit 1
 fi
 
-# Copy rootfs aside
-TMP_ROOTFS=$(mktemp)
-cp "$ROOT_PART" "$TMP_ROOTFS"
-ORIGINAL_LABEL=$(/sbin/e2label "$TMP_ROOTFS")
-NEW_LABEL="A${ORIGINAL_LABEL}"
-/sbin/tune2fs -L "$NEW_LABEL" "$TMP_ROOTFS"
-
-# TODO(adlr): Sign TMP_ROOTFS w/ OS vendor's private key
-
 # Put rootfs into the out file
-cat "$TMP_ROOTFS" >> "$UNCOMPRESSED_OUT_FILE"
-
-rm "$TMP_ROOTFS"
+cat "$ROOT_PART" >> "$UNCOMPRESSED_OUT_FILE"
 
 # compress and hash
 CS_AND_RET_CODES=$(gzip -c "$UNCOMPRESSED_OUT_FILE" | \
                    tee "$FINAL_OUT_FILE" | openssl sha1 -binary | \
                    openssl base64 | tr '\n' ' '; \
                    echo ${PIPESTATUS[*]})
 EXPECTED_RET_CODES="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
 
 rm "$UNCOMPRESSED_OUT_FILE"
 
 echo Success. hash is "$CALC_CS"