'Process a builtin type or an unknown type which
will be treated as a regular file.'

def _proc_builtin(self, tarfile):

    self.offset_data = tarfile.fileobj.tell()
    offset = self.offset_data
    if (self.isreg() or (self.type not in SUPPORTED_TYPES)):
        offset += self._block(self.size)
    tarfile.offset = offset
    self._apply_pax_info(tarfile.pax_headers, tarfile.encoding, tarfile.errors)
    return self
