factory_reset.sh

#!/bin/sh -x

# Copyright (c) 2011 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.

# This runs from the factory install/reset shim. This MUST be run
# from USB, in developer mode. This script will wipe OQC activity and
# put the system back into factory fresh/shippable state.
echo "Factory reset"

# TODO: How do we know what this is for the general case?
if [ -b /dev/sda ]; then
  STATE_DEV="/dev/sda1"
elif [ -b /dev/mmcblk0 ]; then
  STATE_DEV="/dev/mmcblk01"
else
  echo "Failed to find root SSD."
  exit 1
fi

# Tcsd will bring up the tpm and de-own it,
# as we are in developer/recovery mode.
start tcsd

# Just wipe the start of the partition and remake the fs on
# the stateful partition.
dd bs=4M count=1 if=/dev/zero of=${STATE_DEV}
/sbin/mkfs.ext3 "$STATE_DEV"

# Do any board specific resetting here.
# board_factory_reset.sh will be installed by the board overlay if necessary.
BOARD_RESET=/usr/sbin/board_factory_reset.sh
if [ -x "${BOARD_RESET}" ]; then
  echo "Running board specific factory reset: ${BOARD_RESET}"
  ${BOARD_RESET} || exit 1
fi

echo "Done"