Streams blocking after set non-blocking
| Bug #36796 | Streams blocking after set non-blocking | ||||
|---|---|---|---|---|---|
| Submitted: | 2006-03-20 06:37 UTC | Modified: | 2007-07-17 13:30 UTC | ||
| From: | seufert at gmail dot com | Assigned: | jani (profile) | ||
| Status: | Closed | Package: | Streams related | ||
| PHP Version: | 5.1.2 | OS: | AMD64 Linux 2.6 (Debian) | ||
| Private report: | No | CVE-ID: | None | ||
[2006-03-20 06:37 UTC] seufert at gmail dot com
Description:
------------
Opening a TCP stream, and attempting to access in a non-blocking matter results in fread continuing to block.
Reproduce code:
---------------
<?php
$socket = stream_socket_server('tcp://0.0.0.0:3838');
stream_set_blocking($socket, 0);
$conns = array(); $text = "";
while(true){
$new_connection = @stream_socket_accept($socket, 0);
print "T";
if(!$new_connection)
sleep(1);
else {
stream_set_blocking($new_connection,0);
$conns[] = $new_connection;
unset($new_connection);
}
foreach($conns as $k=>$c) $text .= fread($conns[$k], 8192);
foreach($conns as $c) fwrite($c,$text);
$text = "";
}
?>
Expected result:
----------------
After connecting once or more (with telnet or similar), the program should still tick (will print 'T' to console).
Actual result:
--------------
Once 1 or more connections are established, the fread blocks, and prevents the program from iterating (or printing 'T' to the console). It will iterate after data is received from all connections.
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[2007-07-17 13:30 UTC] jani@php.net