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USB image: - have a stateful partition - use a read-only system partition Installer: - copy read-only system partition from USB to hard drive, skip fsck check - make stateful partition empty System: - Change to tolerate empty stateful partition on bootup - Don't keep so much of /var on stateful partition (var/lib should be in system image) Autoupdate: - Fix a couple checks to allow partitions 3 and 4 to be system partitions - Fix a misnomer in mk_memento_images.sh Review URL: http://chromereview.prom.corp.google.com/1175102 git-svn-id: svn://chrome-svn/chromeos/trunk@87 06c00378-0e64-4dae-be16-12b19f9950a1
110 lines
3.5 KiB
Bash
Executable File
110 lines
3.5 KiB
Bash
Executable File
#!/bin/bash
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# Copyright (c) 2009 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 convert the output of build_image.sh to a usb 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 "$0")/common.sh"
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IMAGES_DIR="${DEFAULT_BUILD_ROOT}/images"
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# Default to the most recent image
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DEFAULT_FROM="${IMAGES_DIR}/`ls -t $IMAGES_DIR | head -1`"
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# Script can be run either inside or outside the chroot.
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if [ $INSIDE_CHROOT -eq 1 ]
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then
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# Inside the chroot, so output to usb.img in the same dir as the other
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# images.
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DEFAULT_TO="${DEFAULT_FROM}/usb.img"
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DEFAULT_TO_HELP="Destination file for USB image."
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else
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# Outside the chroot, so output to the default device for a usb key.
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DEFAULT_TO="/dev/sdb"
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DEFAULT_TO_HELP="Destination device for USB keyfob."
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fi
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# Flags
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DEFINE_string from "$DEFAULT_FROM" \
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"Directory containing rootfs.image and mbr.image"
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DEFINE_string to "$DEFAULT_TO" "$DEFAULT_TO_HELP"
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DEFINE_boolean yes $FLAGS_FALSE "Answer yes to all prompts" "y"
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# Parse command line
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FLAGS "$@" || exit 1
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eval set -- "${FLAGS_ARGV}"
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# Die on any errors.
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set -e
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# Convert args to paths. Need eval to un-quote the string so that shell
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# chars like ~ are processed; just doing FOO=`readlink -f $FOO` won't work.
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FLAGS_from=`eval readlink -f $FLAGS_from`
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FLAGS_to=`eval readlink -f $FLAGS_to`
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# Copy MBR and rootfs to output image
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if [ -b "$FLAGS_to" ]
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then
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# Output to a block device (i.e., a real USB key), so need sudo dd
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echo "Copying USB image ${FLAGS_from} to device ${FLAGS_to}..."
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# Make sure this is really what the user wants, before nuking the device
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if [ $FLAGS_yes -ne $FLAGS_TRUE ]
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then
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echo "This will erase all data on this device:"
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sudo fdisk -l "$FLAGS_to" | grep Disk | head -1
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read -p "Are you sure (y/N)? " SURE
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SURE="${SURE:0:1}" # Get just the first character
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if [ "$SURE" != "y" ]
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then
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echo "Ok, better safe than sorry."
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exit 1
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fi
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fi
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STATE_PART="$FLAGS_to"1
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ROOT_PART="$FLAGS_to"3
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sudo dd if="${FLAGS_from}/mbr.image" of="$FLAGS_to"
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sync
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sudo partprobe "$FLAGS_to"
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sync
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sudo dd if="${FLAGS_from}/rootfs.image" of="$ROOT_PART" bs=4M
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sudo mkfs.ext3 -F -L C-STATE "$STATE_PART"
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sync
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echo "Done."
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else
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# Output to a file, so just cat the source images together
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PART_SIZE=$(stat -c%s "${FLAGS_from}/rootfs.image")
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echo "Creating empty stateful partition"
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dd if=/dev/zero of="${FLAGS_from}/stateful_partition.image" bs=1 count=1 \
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seek=$(($PART_SIZE - 1))
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mkfs.ext3 -F -L C-STATE "${FLAGS_from}/stateful_partition.image"
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# Create a sparse output file
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dd if=/dev/zero of="${FLAGS_to}" bs=1 count=1 \
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seek=$(( ($PART_SIZE * 2) + 512 - 1))
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echo "Copying USB image to file ${FLAGS_to}..."
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dd if="${FLAGS_from}/mbr.image" of="$FLAGS_to" conv=notrunc
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dd if="${FLAGS_from}/stateful_partition.image" of="$FLAGS_to" seek=1 bs=512 \
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conv=notrunc
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cat "${FLAGS_from}/rootfs.image" >> "$FLAGS_to"
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echo "Done. To copy to USB keyfob, outside the chroot, do something like:"
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echo " sudo dd if=${FLAGS_to} of=/dev/sdb bs=4M"
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echo "where /dev/sdb is the entire keyfob."
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if [ $INSIDE_CHROOT -eq 1 ]
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then
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echo "NOTE: Since you are currently inside the chroot, and you'll need to"
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echo "run dd outside the chroot, the path to the USB image will be"
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echo "different (ex: ~/chromeos/trunk/src/build/images/SOME_DIR/usb.img)."
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fi
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fi
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