code: func newFifos(root, id string, tty, stdin bool) (*cio.FIFOSet, error) {
  	root = filepath.Join(root, "io")
  	if err := os.MkdirAll(root, 0700); err != nil {
  		return nil, err
  	}
  	fifos, err := cio.NewFIFOSetInDir(root, id, tty)
  	if err != nil {
  		return nil, err
  	}
  	if !stdin {
  		fifos.Stdin = ""
  	}
  	return fifos, nil
  }
docs: // newFifos creates fifos directory for a container.