Create a new command update_kernel.sh

update_kernel.sh

+#!/bin/bash
+
+# Copyright (c) 2009-2010 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.
+
+# Script to update the kernel on a live running ChromiumOS instance.
+
+# Load common constants.  This should be the first executable line.
+# The path to common.sh should be relative to your script's location.
+
+. "$(dirname $0)/common.sh"
+. "$(dirname $0)/remote_access.sh"
+
+DEFINE_string board "" "Override board reported by target"
+DEFINE_string partition "" "Override kernel partition reported by target"
+
+function cleanup {
+  cleanup_remote_access
+  rm -rf "${TMP}"
+}
+
+# Ask the target what the kernel partition is
+function learn_partition() {
+  [ -n "${FLAGS_partition}" ] && return
+  remote_sh cat /proc/cmdline

[Sameer Nanda, 2010/12/02 17:22:41]

probably simpler to use "rootdev" instead.

+  if echo "${REMOTE_OUT}" | grep -q "/dev/sda3"; then
+    FLAGS_partition="/dev/sda2"
+  else
+    FLAGS_partition="/dev/sda4"
+  fi
+  if [ -z "${FLAGS_partition}" ]; then
+    error "Partition required"
+    exit 1
+  fi
+  info "Target reports kernel partition is ${FLAGS_partition}"
+}
+
+function main() {
+  assert_outside_chroot
+
+  cd $(dirname "$0")
+
+  FLAGS "$@" || exit 1
+  eval set -- "${FLAGS_ARGV}"
+
+  set -e
+
+  trap cleanup EXIT
+
+  TMP=$(mktemp -d /tmp/image_to_live.XXXX)
+
+  remote_access_init
+
+  learn_board
+
+  remote_sh uname -r -v
+
+  old_kernel="${REMOTE_OUT}"
+
+  cmd="vbutil_kernel --pack new_kern.bin \
+       --keyblock /usr/share/vboot/devkeys/kernel.keyblock \
+       --signprivate /usr/share/vboot/devkeys/kernel_data_key.vbprivk \
+       --version 1 \
+       --config ../build/images/${FLAGS_board}/latest/config.txt \
+       --bootloader /lib64/bootstub/bootstub.efi \
+       --vmlinuz /build/${FLAGS_board}/boot/vmlinuz"
+
+  ./enter_chroot.sh -- "${cmd}"
+
+  learn_partition
+
+  remote_cp_to new_kern.bin /tmp
+
+  remote_sh dd if=/tmp/new_kern.bin of="${FLAGS_partition}"
+
+  remote_reboot
+
+  remote_sh uname -r -v
+
+  info "old kernel: ${old_kernel}"
+
+  info "new kernel: ${REMOTE_OUT}"
+}
+
+main $@