fixloader.py

#!/usr/bin/env python3
# -*- Mode: Python; tab-width: 4 -*-
#
# Fix for setuploader
#
# Copyright (C) 2005-2006 Gianluigi Tiesi <sherpya@netfarm.it>
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by the
# Free Software Foundation; either version 2, or (at your option) any later
# version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTIBILITY
# or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
# for more details.
# ======================================================================

from sys import argv, exit as sys_exit

if __name__ == '__main__':
    if len(argv) < 2:
        print('Usage: fixloader.py ntldr')
        sys_exit()

    data = open(argv[1], 'rb').read()

    if data.find(b'setupldr.exe')==-1:
        print('Wrong file')
        sys_exit()

    if data[:2] == b'MZ':
        print('Loader already fixed')
        sys_exit()

    data = b'MZ' + data.split(b'MZ', 1).pop()

    open(argv[1], 'wb').write(data)
    print('Loader fixed')