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36e030df80
This makes the output easier to follow when multiple scripts are being run. BRANCH=None BUG=chromium:714598 TEST=signing images still works Change-Id: I48edde260e1d1db88f65624c7ff46ad2ac1cc2f4 Reviewed-on: https://chromium-review.googlesource.com/498100 Commit-Ready: Mike Frysinger <vapier@chromium.org> Tested-by: Mike Frysinger <vapier@chromium.org> Reviewed-by: David Riley <davidriley@chromium.org>
66 lines
1.9 KiB
Bash
Executable File
66 lines
1.9 KiB
Bash
Executable File
#!/bin/bash
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# Copyright (c) 2013 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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# Script to remove /boot directory from an image.
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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 "$0")/common.sh"
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load_shflags
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DEFINE_string image "chromiumos_image.bin" \
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"Input file name of Chrome OS image to strip /boot from."
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# Parse command line.
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FLAGS "$@" || exit 1
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eval set -- "${FLAGS_ARGV}"
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# Abort on error.
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set -e
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if [ -z "${FLAGS_image}" ] || [ ! -s "${FLAGS_image}" ] ; then
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die "Error: need a valid file by --image"
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fi
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# Swiped/modifed from $SRC/src/scripts/base_library/base_image_util.sh.
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zero_free_space() {
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local rootfs="$1"
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info "Zeroing freespace in ${rootfs}"
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# dd is a silly thing and will produce a "No space left on device" message
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# that cannot be turned off and is confusing to unsuspecting victims.
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( sudo dd if=/dev/zero of="${rootfs}/filler" bs=4096 conv=fdatasync \
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status=noxfer || true ) 2>&1 | grep -v "No space left on device"
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sudo rm "${rootfs}/filler"
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}
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strip_boot() {
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local image=$1
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# Mount image so we can modify it.
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local rootfs_dir=$(make_temp_dir)
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mount_image_partition ${image} 3 ${rootfs_dir}
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sudo rm -rf "${rootfs_dir}/boot" &&
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info "/boot directory was removed."
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# To prevent the files we just removed from the FS from remaining as non-
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# zero trash blocks that bloat payload sizes, need to zero them. This was
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# done when the image was built, but needs to be repeated now that we've
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# modified it in a non-trivial way.
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zero_free_space "${rootfs_dir}"
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}
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IMAGE=$(readlink -f "${FLAGS_image}")
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if [[ -z "${IMAGE}" || ! -f "${IMAGE}" ]]; then
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die "Missing required argument: --from (image to update)"
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fi
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strip_boot "${IMAGE}"
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