Bug #75538 [Asn->Csd]: stream_set_blocking() always returning false for files on windows

Edit report at https://bugs.php.net/bug.php?id=75538&edit=1 ID: 75538 Updated by: requinix@php.net Reported by: samuel dot chemla at orange dot com Summary: stream_set_blocking() always returning false for files on windows -Status: Assigned +Status: Closed Type: Bug Package: Streams related Operating System: Windows PHP Version: 7.1.11 Assigned To: ab Block user comment: N Private report: N New Comment: > My understanding is that stream_set_blocking does *not* work for regular files, whatever the OS > is. Linux and BSD may or may not support it, but all seem to support setting the flag. http://man7.org/linux/man-pages/man2/open.2.html > When possible, the file is opened in nonblocking mode. > Note that this flag has no effect for regular files and block devices https://linux.die.net/man/2/open > When possible, the file is opened in nonblocking mode. https://www.freebsd.org/cgi/man.cgi?sektion=2&query=open > O_NONBLOCK do not block on open But Windows' _open doesn't have a "_O_NONBLOCK" or other non-blocking flag. https://msdn.microsoft.com/en-us/library/z0kc8e3z.aspx In fact as far as I can tell, it doesn't have an fcntl (though winsock has something equivalent for sockets?) or O_NONBLOCK flag anywhere. I think that's the problem: not that Windows doesn't allow setting non-blocking on files but that it can't. Previous Comments: ------------------------------------------------------------------------ [2018-11-16 13:54:36] samuel dot chemla at orange dot com I'm reopening this because I think it requires clarification ------------------------------------------------------------------------ [2018-11-09 20:59:30] samel dot chemla at orange dot com Hi! I know this is an old topic, but I just saw the doc http://php.net/manual/en/function.stream-set-blocking.php was updated with that note: "On Windows, this has no affect on local files. Non-blocking IO for local files is not supported on Windows." My understanding is that stream_set_blocking does *not* work for regular files, whatever the OS is. Then if this is correct, then: * the windows note should be removed from the documentation, * this statement should be fixed: "This function works for any stream that supports non-blocking mode (currently, regular files and socket streams)." * stream_set_blocking() should return false, whatever the OS is. IE linux implementation should be fixed because actually it returns true. Can you clarify? Regards. ------------------------------------------------------------------------ [2018-01-26 16:47:03] ab@php.net Closing as per request. Thanks for documenting, Matt. ------------------------------------------------------------------------ [2018-01-23 02:53:11] mattficken@php.net stream_set_blocking() for local files can't be supported on Windows. I have updated the documentation notes to state that. This bug can probably be closed now. ------------------------------------------------------------------------ [2017-11-22 10:04:39] samuel dot chemla at orange dot com Hi, Thanks for your answer. I didn't realize the implication of this, and I understand it's not a priority. I'm not C developper, but I would be happy to help on PHP side (testing?)... Maybe we should at least update the doc to mention that non blocking file acces cannot (yet :-)) be guaranteed. ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at https://bugs.php.net/bug.php?id=75538 -- Edit this bug report at https://bugs.php.net/bug.php?id=75538&edit=1