win32popen.py 文件源码

def MakePrivateHandle(handle, replace = 1):
  """Turn an inherited handle into a non inherited one. This avoids the
  handle duplication that occurs on CreateProcess calls which can create
  uncloseable pipes."""

  ### Could change implementation to use SetHandleInformation()...

  flags = win32con.DUPLICATE_SAME_ACCESS
  proc = win32api.GetCurrentProcess()
  if replace: flags = flags | win32con.DUPLICATE_CLOSE_SOURCE
  newhandle = win32api.DuplicateHandle(proc,handle,proc,0,0,flags)
  if replace: handle.Detach() # handle was already deleted by the last call
  return newhandle