Edit report at http://bugs.php.net/bug.php?id=52602&edit=1
ID: 52602
Updated by: cataphract@php.net
Reported by: g at gsxm dot net
Summary: fread is blocking even with the use of stream_select
-Status: Feedback
+Status: Verified
Type: Bug
Package: Sockets related
Operating System: Gentoo x86_64
PHP Version: 5.2.14
Assigned To: cataphract
Block user comment: N
Previous Comments:
------------------------------------------------------------------------
[2010-08-14 05:35:51] g at gsxm dot net
Not sure why I did not think of this before, but perhaps only the
stream-* functions works with stream_select
------------------------------------------------------------------------
[2010-08-14 03:07:41] g at gsxm dot net
Description:
------------
Using PHP CLI
Gentoo 64 bit box
PHP version 5.2.14
clean compile
Dual AMD Opteron 2212 CPU
Something is blocking in the code, it seems to be fread. I am sure this
is not the expected result.
I greatly simplified the sample I included.
I can just put the socket/stream in non-blocking mode, but I would much
prefer to use the code as I designed it.
I have considered just using the socket functions in php or just writing
the code in C.
Once in a great while it will resume after about thirty to sixty
seconds. In non-blocking mode I have no issues. This is a php cli script
that connects to another daemon running on the same machine, I am using
this php script to parse data to place in a sql database.
Test script:
---------------
$sock=@fsockopen("localhost","7777",$errno,$errstr,3);
if (!$sock)
{
echo "sock error".$crlf;
}
while(true)
{
$read=array($sock);
$write=NULL;
$except=NULL;
$status=@stream_select($read,$write,$except,1);
if ($status===false)
{
echo "select error".$crlf;
exit();
}
if ($status>0)
{
$data = @fread($sock,128);
echo $data;
$out .= $data;
}
usleep(10000);
}
Expected result:
----------------
The loop should run for eternity as expected.
Actual result:
--------------
The loop is blocked, I am presuming by fread due to a failure of the
expected behavior of stream_select.
------------------------------------------------------------------------
--
Edit this bug report at http://bugs.php.net/bug.php?id=52602&edit=1