From: larryjadams at comcast dot net
Operating system: WindowsXP Pro SP2
PHP version: 5.0.5
PHP Bug Type: Scripting Engine problem
Bug description: stream_select() in conjuntion with popen() does not appear to
work
Description:
------------
If I call $my_fd = popen("mycommand", "rb"); to a function that
hangs/suspends and then subsquently call:
stream_select(...) using $read=array($my_fd) with a timeout, the
steam_select returns immediately, event if I have set $my_fd as blocking
using stream_set_blocking();
I would like stream_select to wait on output from the pipe prior to
firing, or to drive a timeout.
Thanks,
Larry Adams
The Cacti Group
Reproduce code:
---------------
if (function_exists("stream_select")) {
if ($config["cacti_server_os"] == "unix") {
$fp = popen($command, "r");
}else{
$fp = popen($command, "rb");
}
/* set script server timeout */
$script_timeout = read_config_option("script_timeout");
/* establish timeout variables */
$to_sec = floor($script_timeout/1000);
$to_usec = ($script_timeout%1000)*1000;
/* Prepare the read array */
$read = array($fp);
stream_set_blocking ($fp, 1);
if (false === ($num_changed_streams = stream_select($read, $write =
NULL, $except = NULL, $to_sec, $to_usec))) {
cacti_log("WARNING: SERVER POPEN Timed out.");
$output = "U";
}elseif ($num_changed_streams > 0) {
$output = fgets($fp, 4096);
}
pclose($fp);
}else{
$output = `$command`;
}
$command = a file with the following:
<?php sleep(20); echo "Hello:20.00\n"; ?>
The stream_select timeout is 5 seconds.
Expected result:
----------------
popen will be called, stream_select will block until timeout has expired,
the number of fd's changed will be 0 and my result will be as expected.
Actual result:
--------------
stream_select returns immediately.
--
Edit bug report at http://bugs.php.net/?id=35131&edit=1
--
Try a CVS snapshot (php4): http://bugs.php.net/fix.php?id=35131&r=trysnapshot4
Try a CVS snapshot (php5.0):
http://bugs.php.net/fix.php?id=35131&r=trysnapshot50
Try a CVS snapshot (php5.1):
http://bugs.php.net/fix.php?id=35131&r=trysnapshot51
Fixed in CVS: http://bugs.php.net/fix.php?id=35131&r=fixedcvs
Fixed in release: http://bugs.php.net/fix.php?id=35131&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=35131&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=35131&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=35131&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=35131&r=support
Expected behavior: http://bugs.php.net/fix.php?id=35131&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=35131&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=35131&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=35131&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=35131&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=35131&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=35131&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=35131&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=35131&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=35131&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=35131&r=mysqlcfg
