extend_fvm.py (806B)
1 # Copyright 2018 The Chromium Authors 2 # Use of this source code is governed by a BSD-style license that can be 3 # found in the LICENSE file. 4 5 """Copies a FVM file and extends it by a specified amount. 6 7 Arg #1: path to 'fvm'. 8 #2: the path to the source fvm.blk. 9 #3: the path that the extended FVM file will be written to. 10 #4: the additional number of bytes to grow fvm.blk by.""" 11 12 import os 13 import shutil 14 import subprocess 15 import sys 16 17 def ExtendFVM(fvm_tool_path, src_path, dest_path, delta): 18 old_size = os.path.getsize(src_path) 19 new_size = old_size + int(delta) 20 shutil.copyfile(src_path, dest_path) 21 subprocess.check_call([fvm_tool_path, dest_path, 'extend', '--length', 22 str(new_size)]) 23 return 0 24 25 if __name__ == '__main__': 26 sys.exit(ExtendFVM(*sys.argv[1:]))