#35131 [Asn->Fbk]: stream_select() in conjuntion with popen() does not appear to work

ID: 35131 Updated by: sniper@php.net Reported By: larryjadams at comcast dot net -Status: Assigned +Status: Feedback Bug Type: *General Issues Operating System: WindowsXP Pro SP2 PHP Version: 5.0.5 Assigned To: wez New Comment: Please try using this CVS snapshot: http://snaps.php.net/php5-latest.tar.gz For Windows: http://snaps.php.net/win32/php5-win32-latest.zip Previous Comments: ------------------------------------------------------------------------ [2005-11-06 23:09:04] sniper@php.net Assigned to the author of this part. ------------------------------------------------------------------------ [2005-11-06 22:07:19] larryjadams at comcast dot net 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 this bug report at http://bugs.php.net/?id=35131&edit=1