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cef56b7dea
The developer script runner did not pad for the trailing GPT header and using a full-sized kernel image extracted from a build image resulted in failure. This change accomodates for that and warns when an error occurs. TEST=used a dd'd over kernel image and it worked BUG=chromium-os:7451 Change-Id: I8efd7fbb92fe4d5a3c715580f8c21e52c21957c9 Review URL: http://codereview.chromium.org/4418001 (cherry picked from commit 5f928bef4eb551b94fcc45821eee71aa206cef86) Review URL: http://codereview.chromium.org/4417002
123 lines
3.9 KiB
Bash
Executable File
123 lines
3.9 KiB
Bash
Executable File
#!/bin/bash
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# Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
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# Use of this source code is governed by a BSD-style license that can be
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# found in the LICENSE file.
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# This script modifies a base image to act as a recovery installer.
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# If a developer payload is supplied, it will be used.
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# It is very straight forward, top to bottom to show clearly what is
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# little is needed to create a developer shim to run a signed script.
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# Load common constants. This should be the first executable line.
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# The path to common.sh should be relative to your script's location.
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. "$(dirname "$0")/common.sh"
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# Load functions and constants for chromeos-install
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. "$(dirname "$0")/chromeos-common.sh"
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DEFINE_integer statefulfs_size 2 \
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"Number of mebibytes to use for the stateful filesystem"
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DEFINE_string developer_private_key \
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"/usr/share/vboot/devkeys/kernel_data_key.vbprivk" \
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"Path to the developer's private key"
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DEFINE_string developer_keyblock \
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"/usr/share/vboot/devkeys/kernel.keyblock" \
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"Path to the developer's keyblock"
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DEFINE_string developer_script "" \
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"Path to the developer script if desired."
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# TODO(wad) wire up support for just swapping a pre-made kernel
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# Skips the build steps and just does the kernel swap.
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DEFINE_string kernel_image "" \
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"Path to a pre-built recovery kernel"
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DEFINE_boolean verbose $FLAGS_FALSE \
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"Emits stderr too" v
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DEFINE_string image "dev_runner_image.bin" \
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"Path to output image to"
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# Parse command line
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FLAGS "$@" || exit 1
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eval set -- "${FLAGS_ARGV}"
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if [ $FLAGS_verbose -eq $FLAGS_FALSE ]; then
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exec 2>/dev/null
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fi
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set -x # Make debugging with -v easy.
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if [ -z "$FLAGS_kernel_image" ]; then
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die "--kernel_image with a recovery kernel is needed"
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fi
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if [ -z "$FLAGS_developer_script" ]; then
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die "--developer_script must be supplied."
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fi
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locate_gpt
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set -eu
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header_offset=34
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stateful_sectors=$(((FLAGS_statefulfs_size * 1024 * 1024) / 512))
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stateful_sectors=$(roundup $stateful_sectors)
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if [ -b "$FLAGS_image" ]; then
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sudo=sudo
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else
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max_kern_size=32768
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dd if=/dev/zero of="${FLAGS_image}" bs=512 count=0 \
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seek=$((1 + max_kern_size + (2 * header_offset) + stateful_sectors))
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sudo=""
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fi
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## STATEFUL
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stateful_image=$(mktemp)
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trap "rm $stateful_image" EXIT
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dd if=/dev/zero of="$stateful_image" bs=512 \
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seek=$stateful_sectors count=0
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/sbin/mkfs.ext3 -F -b 4096 $stateful_image 1>&2
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stateful_mnt=$(mktemp -d)
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sudo mount -o loop $stateful_image "$stateful_mnt" || exit 1
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userdir="$stateful_mnt/userdir"
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userfile="$userdir/runme"
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sudo mkdir -p "$userdir"
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sudo cp "$FLAGS_developer_script" "$userfile"
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sudo chmod +x "$userfile"
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sudo dev_sign_file --sign "$userfile" \
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--keyblock "$FLAGS_developer_keyblock" \
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--signprivate "$FLAGS_developer_private_key" \
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--vblock "${userfile}.vblock"
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sudo umount -d "$stateful_mnt"
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rmdir "$stateful_mnt"
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## GPT
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kernel_bytes=$(stat -c '%s' $FLAGS_kernel_image)
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kernel_sectors=$((kernel_bytes / 512))
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kernel_sectors=$(roundup $kernel_sectors)
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$sudo $GPT create $FLAGS_image
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trap "rm $FLAGS_image; echo 'An error occurred! Rerun with -v for details.'" ERR
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offset=$header_offset
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$sudo $GPT add -b $offset -s $stateful_sectors \
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-t data -l "STATE" $FLAGS_image
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$sudo dd if=$stateful_image of=$FLAGS_image bs=512 conv=notrunc \
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seek=$offset count=$stateful_sectors
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offset=$((offset + stateful_sectors))
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$sudo $GPT add -b $offset -s $kernel_sectors \
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-t kernel -l "KERN-A" -S 0 -T 15 -P 15 $FLAGS_image
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$sudo dd if=$FLAGS_kernel_image of=$FLAGS_image bs=512 conv=notrunc \
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seek=$offset count=$kernel_sectors
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# The kernel will ignore GPT without a legacymbr.
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PMBRCODE=$(readlink -f /usr/share/syslinux/gptmbr.bin)
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# Have it legacy boot off of stateful, not that it should matter.
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$sudo $GPT boot -p -b "$PMBRCODE" -i 1 $FLAGS_image 1>&2
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$sudo $GPT show $FLAGS_image
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echo "Emitted $FLAGS_image successfully!"
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