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Bug #25309 stream_set_blocking() doesn't set non-blocking mode
Submitted: 2003-08-29 06:38 UTC Modified: 2003-08-29 07:18 UTC
From: flugelaar at pandora dot be Assigned:
Status: Not a bug Package: Sockets related
PHP Version: 5CVS-2003-08-29 (dev) OS: Linux Slackware 9.0
Private report: No CVE-ID: None
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From: flugelaar at pandora dot be
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 [2003-08-29 06:38 UTC] flugelaar at pandora dot be
Fgets() keeps blocking when I try to make a socket from stream_socket_accept() non-blocking. The listening socket is also non-blocking.

Reproduce code:
This code is still blocking on the fgets:

    $conn = @stream_socket_accept($hsock,1,&$host);
    if (!$conn) return;
    echo "Got connection from ".$host."\n";
    $get = '';
    $loop = 0;
    while ($loop <= 10) { $getl = trim(fgets($conn)); $loop++; if (empty($getl)) { echo "End of headers\n"; break; }else{ $get .= $getl."\n"; } }

This is the code that created the $hsock :

$hsock = stream_socket_server('tcp://'.$bind.':'.$port, $errno, $errstr);
if (!$hsock) die ('Listening socket failed: '.$errstr);
if (!socket_set_blocking($hsock,false)) echo "Socket (listening) set nonblock failed\n";

$bind is and port is 3333

Expected result:
It shouldn't hang on the fgets() because this script handles two sockets. And the other one times out when fgets() hangs untill something is recieved.

Actual result:
Fgets() keeps blocking so my other connection times out.


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 [2003-08-29 07:18 UTC]
fgets() works in a greedy-read mode, so it will keep reading until it gets the complete line (up to the size you requested).

If you are using multiple sockets, you should be using blocking sockets and stream_select(), and not using fgets() but instead fread().

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