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Unified Diff: src/scripts/kernel_fetcher.sh

Issue 600074: Create a fourth partition to put the raw kernel image in. (Closed)
Patch Set: Simplify kernel_fetcher.sh and make it more robust. Created 10 years, 10 months ago
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Index: src/scripts/kernel_fetcher.sh
diff --git a/src/scripts/kernel_fetcher.sh b/src/scripts/kernel_fetcher.sh
new file mode 100755
index 0000000000000000000000000000000000000000..166fe591583f3cff3a0a80d2fbc0663acb65238f
--- /dev/null
+++ b/src/scripts/kernel_fetcher.sh
@@ -0,0 +1,61 @@
+#!/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.
+
+# Load common constants. This should be the first executable line.
+# The path to common.sh should be relative to your script's location.
+. "$(dirname "$0")/common.sh"
+
+IMAGES_DIR="${DEFAULT_BUILD_ROOT}/images"
+
+# Flags
+DEFINE_string from "" "Directory containing rootfs.image and mbr.image"
+DEFINE_string to "" "Destination file for USB image."
+DEFINE_integer offset 0 "Offset to write the kernel to in the destination."
+
+# Parse command line
+FLAGS "$@" || exit 1
+eval set -- "${FLAGS_ARGV}"
+
+# Die on any errors.
+set -e
+
+if [ -z "${FLAGS_from}" -o -z "${FLAGS_to}" -o -z "${FLAGS_offset}" ]
+then
+ echo "You must define all of from, to and offset."
+ exit 1
+fi
+
+# Convert args to paths. Need eval to un-quote the string so that shell
+# chars like ~ are processed; just doing FOO=`readlink -f $FOO` won't work.
+FLAGS_from=`eval readlink -f ${FLAGS_from}`
+FLAGS_to=`eval readlink -f ${FLAGS_to}`
+
+function do_cleanup {
+ sync
+ sudo umount -l /tmp/kernel_fetch.$$
+ rmdir /tmp/kernel_fetch.$$
+}
+
+trap do_cleanup EXIT
+
+#
+# Set up loop device. This time it is used to fetch the built kernel from the
+# root image. This kernel is then written to the fourth partition.
+#
+echo "Fetching kernel from root image..."
+mkdir /tmp/kernel_fetch.$$
+sudo mount -o loop "${FLAGS_from}/rootfs.image" /tmp/kernel_fetch.$$
+
+echo "Writing kernel to ${FLAGS_to} at ${FLAGS_offset}..."
+sudo "${SCRIPTS_DIR}"/file_copy.py \
+ if=/tmp/kernel_fetch.$$/boot/vmlinux.uimg \
+ of="${FLAGS_to}" \
+ seek_bytes="${FLAGS_offset}"
+echo "Done."
+
+do_cleanup
+
+trap - EXIT
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