Edit report at https://bugs.php.net/bug.php?id=65260&edit=1
ID: 65260
Updated by: cataphr...@php.net
Reported by: bugs dot php dot net at ss dot chernousov dot net
Summary: socket_sendmsg/socket_recvmsg wrong number of file
descriptors
-Status: Open
+Status: Feedback
Type: Bug
Package: Sockets related
Operating System: Gentoo Linux
PHP Version: 5.5.0
Block user comment: N
Private report: N
New Comment:
Can you test this branch: https://github.com/cataphract/php-src/tree/bug65260 ?
Thanks
Previous Comments:
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[2013-07-14 09:10:18] bugs dot php dot net at ss dot chernousov dot net
Description:
------------
Regardless of how many file descriptors were sent with socket_sendmsg(),
socket_recvmsg() always receives fd/0 as the very first descriptor (even if it
wasn't sent at all) and then maximum two descriptors that were really sent.
Test script sends one descriptor $fd, but receives two, as described
above. If we add more descriptors to send (let's say 5, and change third
argument
of socket_cmsg_space() to 5), only first two will be actually received, and
extra
fd/0 will precede them.
I know these functions are still experimental, but they are like a manna from
heaven many backend php-developers were seeking.
Test script:
---------------
https://gist.github.com/5lava/5993637
Similar PHP test
https://github.com/cataphract/php-src/blob/sendrecvmsg/ext/sockets/tests/socket_cmsg_rights.phpt
taken from here: https://wiki.php.net/rfc/sendrecvmsg
Expected result:
----------------
One new file descriptors should be added after socket_recvmsg() call.
Actual result:
--------------
Two new file descriptors added.
First is always referencing fd/0, and 2nd is the one which was actually sent.
File descriptors before socket_recvmsg() call:
0 -> /etc/passwd <--- reopened fd/0
1 -> /dev/pts/3 <--- stdout
2 -> /dev/pts/3 <--- stderr
3 -> socket:[5819664] <--- $send_s
4 -> socket:[5819665] <--- $recv_s
5 -> /etc/group <--- $fd - the one we want to send
6 -> pipe:[5819666] <--- passthru() pipe
File descriptors after socket_recvmsg() call:
0 -> /etc/passwd <--- reopened fd/0
1 -> /dev/pts/3 <--- stdout
2 -> /dev/pts/3 <--- stderr
3 -> socket:[5819664] <--- $send_s
4 -> socket:[5819665] <--- $recv_s
5 -> /etc/group <--- $fd - the one we sent
6 -> /etc/passwd <--- always the same as fd/0 - shouldn't be here at all
7 -> /etc/group <--- that's the only one we expected to receive
6 -> pipe:[5819666] <--- passthru() pipe
$data contains two Resources:
Array ( ... [control] => [0] => [data] => Array (
[0] => Resource id #10
[1] => Resource id #11 ) ... )
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Edit this bug report at https://bugs.php.net/bug.php?id=65260&edit=1
