def sys_pipes_forever(encoding=_default_encoding):
    """Redirect all C output to sys.stdout/err
    
    This is not a context manager; it turns on C-forwarding permanently.
    """
    global _mighty_wurlitzer
    if _mighty_wurlitzer is None:
        _mighty_wurlitzer = sys_pipes(encoding)
    _mighty_wurlitzer.__enter__()