From: aragon at phat dot za dot net
Operating system: FreeBSD 7.0-STABLE
PHP version: 5.2.7RC4
PHP Bug Type: Streams related
Bug description: feof() blocking on non-blocking socket
Description:
------------
There was a change since 5.2.6 release that is causing feof() to block
when testing a non-blocking socket for EOF. It happens if the socket has
no data waiting in its buffer and is open.
If I compare 5.2.6 and 5.2.7 code it looks like
main/streams/streams.c:642:
if (!stream->eof && PHP_STREAM_OPTION_RETURN_ERR ==
php_stream_set_option(stream,
PHP_STREAM_OPTION_CHECK_LIVENESS,
-1, NULL)) {
stream->eof = 1;
}
In 5.2.6 php_stream_set_option is called with a value of 0, not -1.
Reproduce code:
---------------
<?
$errno = 0; $errstr = '';
$socket = stream_socket_client('tcp://127.0.0.1:80', $errno, $errstr, 5,
STREAM_CLIENT_CONNECT|STREAM_CLIENT_ASYNC_CONNECT);
if (stream_set_blocking($socket, 0) === false) die('blah');
$state = $i = 1;
while (1) {
$read = $write = $except = null;
switch ($state) {
case 1: $write = array($socket); break;
case 2: $read = array($socket); break;
}
echo $i.':'.time().chr(10);
if (stream_select($read, $write, $except, 0, 500000) > 0) {
echo $i.':'.time().chr(10);
if (feof($socket)) break;
echo $i++.':'.time().chr(10);
switch ($state) {
case 1:
fwrite($socket, 'GET /blog HTTP/1.0' .
chr(13).chr(10).chr(13).chr(10));
$state = 2; break;
case 2:
if (fread($socket, 8192)) echo 'ooo'.chr(10); break;
}
}
}
echo time().chr(10);
?>
Expected result:
----------------
1:0
1:0
1:0
2:0
2:0
2:0
ooo
3:0
3:0
0
Actual result:
--------------
1:0
1:0
1:5
2:5
2:5
2:5
ooo
3:5
3:5
5
--
Edit bug report at http://bugs.php.net/?id=46636&edit=1
--
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=46636&r=trysnapshot52
Try a CVS snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=46636&r=trysnapshot53
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=46636&r=trysnapshot60
Fixed in CVS:
http://bugs.php.net/fix.php?id=46636&r=fixedcvs
Fixed in CVS and need be documented:
http://bugs.php.net/fix.php?id=46636&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=46636&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=46636&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=46636&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=46636&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=46636&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=46636&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=46636&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=46636&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=46636&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=46636&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=46636&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=46636&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=46636&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=46636&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=46636&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=46636&r=mysqlcfg
