#!/bin/bash
# Copyright (c) 2012 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 script is automatically generated by @SCRIPT_GENERATOR@
# Do not edit!

if ! type numsectors &>/dev/null; then
  if [[ -f "/usr/sbin/chromeos-common.sh" ]]; then
      . "/usr/sbin/chromeos-common.sh"
  else
    die "Can't load chromeos-common.sh, dying!"
  fi
fi
locate_gpt

# Usage: create_image <device> <min_disk_size> <block_size>
# If <device> is a block device, wipes out the GPT
# If it's not, it creates a new file of the requested size
create_image() {
  local dev=$1
  local min_disk_size=$2
  local block_size=$3
  if [[ -b "${dev}" ]]; then
    # Zap any old partitions (otherwise gpt complains).
    dd if=/dev/zero of="${dev}" conv=notrunc bs=512 count=32
    dd if=/dev/zero of="${dev}" conv=notrunc bs=512 \
      seek=$((${min_disk_size} - 1 - 33)) count=33
  else
    if [[ ! -e "${dev}" ]]; then
      dd if=/dev/zero of="${dev}" bs=${block_size} count=1 \
        seek=$((${min_disk_size} - 1))
    fi
  fi
}