The IPC pipes are now file objects, not file descriptors: * mandos (ClientDBus.CheckedOK): Reorder to group methods, signals and properties together. (ClientHandler.handle, ForkingMixInWithPipes.process_request, ForkingMixInWithPipes.add_pipe_fds, MandosServer.add_pipe_fds): IPC pipes are now file objects, not FDs. (MandosServer.handle_ipc): - '' - Take additional argument "sender" containing the client IPC file object; all callers changed.