def stn(s, length, encoding, errors):
    """Convert a string to a null-terminated bytes object.
    """
    s = s.encode(encoding, errors)
    return s[:length] + (length - len(s)) * NUL
Convert a string to a null-terminated bytes object.
    
product/gradle-plugin/src/main/python/pip/_vendor/distlib/_backport/tarfile.py