win32popen.py 文件源码

def NullFile(inheritable):
  """Create a null file handle."""
  if inheritable:
    sa = pywintypes.SECURITY_ATTRIBUTES()
    sa.bInheritHandle = 1
  else:
    sa = None

  return win32file.CreateFile("nul",
    win32file.GENERIC_READ | win32file.GENERIC_WRITE,
    win32file.FILE_SHARE_READ | win32file.FILE_SHARE_WRITE,
    sa, win32file.OPEN_EXISTING, 0, None)