mirror of
https://github.com/Telecominfraproject/OpenCellular.git
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d9072f169f
For now, it just updates the root password. BUG=5080 TEST=ran the script,tried the image Review URL: http://codereview.chromium.org/3061045
74 lines
1.6 KiB
Bash
Executable File
74 lines
1.6 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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# Customize a Chrome OS release image. The cgpt utility must be on the
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# sudo path.
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#
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# The following changes are applied:
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# - Set the root password.
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# Usage: ./customize_image <image.bin> <root_password>
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readonly ROOTFS_DIR=$(mktemp -d)
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readonly GPT=cgpt
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cleanup() {
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set +e
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echo Cleaning up...
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sudo umount -d "$ROOTFS_DIR"
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rm -rf "$ROOTFS_DIR"
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}
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failure() {
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cleanup
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exit 1
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}
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# Read GPT table to find the starting location of a specific partition.
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# Args: DEVICE PARTNUM
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# Returns: offset (in sectors) of partition PARTNUM
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partoffset() {
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sudo $GPT show -b -i $2 $1
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}
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mount_image() {
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local image=$1
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echo "Mounting image '$image'..."
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local offset=$(partoffset "$image" 3)
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sudo mount -o loop,offset=$((offset * 512)) "$image" "$ROOTFS_DIR"
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}
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change_root_password() {
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local password=$1
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echo "Changing root password to '$password'..."
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local crypted_password="$(echo $password | openssl passwd -1 -stdin)"
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local temp_shadow="$ROOTFS_DIR/etc/tempshadow"
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echo "root:$crypted_password:14500:0:::::" \
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| sudo tee "$temp_shadow" > /dev/null
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grep -Ev ^root: "$ROOTFS_DIR/etc/shadow" \
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| sudo tee -a "$temp_shadow" > /dev/null
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sudo mv -f "$temp_shadow" "$ROOTFS_DIR/etc/shadow"
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}
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main() {
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local image=$1
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local root_password=$2
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if [ $# -ne 2 ]; then
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echo "Usage: $0 <image.bin> <root_password>"
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exit 1
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fi
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set -e
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trap failure EXIT
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mount_image "$image"
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change_root_password "$root_password"
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cleanup
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echo "Done."
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trap - EXIT
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}
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main $@
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