Martin Panter added the comment: Looking at the C code, if a writable buffer is passed, mutate_arg is false, and the buffer is longer than 1024 bytes, then a ValueError is raised:
>>> ioctl(0, 0, bytearray(2048), False) Traceback (most recent call last): File "<stdin>", line 1, in <module> ValueError: ioctl string arg too long So it seems the implementation does not match the documentation’s claim that “the 1024 byte limit . . . is avoided”. IMO this is an implementation bug. But instead of (or in addition to) fixing it, maybe we could consider removing “mutate_flag” parameter altogether. It was originally added as a backwards compatibility helper for Issue 555817 in Python 2.3, and changed to True by default in Python 2.5. ---------- components: +Extension Modules nosy: +vadmium versions: +Python 3.4 _______________________________________ Python tracker <rep...@bugs.python.org> <http://bugs.python.org/issue16834> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
