From: bill at baghead dot co dot uk
Operating system: Redhat 9
PHP version: 4CVS-2003-09-17 (stable)
PHP Bug Type: Sockets related
Bug description: stream_set_blocking with STDIN doesnt block
Description:
------------
Hi,
When using xinetd with a php script - then using php to read from the
"socket" with STDIN / STDOUT, as thats how xinetd translates sockets. I
find that setting blocking on the socket like the code below, I find the
while loops and uses all my cpu time - whereas the fread should block, and
wait till it gets something..
If I uncomment the sleep line - it drops down the cpu usage, but I would
rather have the blocking working.
The process function processes the data, and is irrelevant here.
PHP Was compiled with:
./configure --enable-cli --with-sockets --with-openssl --with-curl
--enable-pcntl --enable-sigchild --with-mysql --enable-sockets
Made with:
C_INCLUDE_PATH=/usr/kerberos/include make
Version:
PHP 4.3.4-dev (cli) (built: Sep 17 2003 16:04:24)
Reproduce code:
---------------
<?php
set_time_limit (0);
ob_implicit_flush ();
stream_set_blocking(STDIN,TRUE);
$read = array(STDIN);
while (true) {
$buf = fread(STDIN,128);
//if ($buf == "") { sleep(1); }
process($buf);
unset($buf);
}
?>
Expected result:
----------------
For the fread to block and wait for input, rather than return immediately.
Actual result:
--------------
The fread returns (even with no data), and loops.
--
Edit bug report at http://bugs.php.net/?id=25575&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=25575&r=trysnapshot4
Try a CVS snapshot (php5): http://bugs.php.net/fix.php?id=25575&r=trysnapshot5
Fixed in CVS: http://bugs.php.net/fix.php?id=25575&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=25575&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=25575&r=needtrace
Try newer version: http://bugs.php.net/fix.php?id=25575&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=25575&r=support
Expected behavior: http://bugs.php.net/fix.php?id=25575&r=notwrong
Not enough info: http://bugs.php.net/fix.php?id=25575&r=notenoughinfo
Submitted twice: http://bugs.php.net/fix.php?id=25575&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=25575&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=25575&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=25575&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=25575&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=25575&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=25575&r=float
