Edit report at http://bugs.php.net/bug.php?id=51836&edit=1
ID: 51836
User updated by: pcdinh at gmail dot com
Reported by: pcdinh at gmail dot com
Summary: proc_get_status() caused child process exit
Status: Open
Type: Bug
-Package: PCNTL related
+Package: Program Execution
Operating System: CentOS 5.4
PHP Version: 5.2.13
New Comment:
Re-categorised
PCNTL => Program Execution
Previous Comments:
------------------------------------------------------------------------
[2010-05-17 08:54:22] pcdinh at gmail dot com
I am sorry, just submit too fast
The expected result should read as follows:
Expected result:
----------------
[r...@clipserver test]# ./test3.php
Parent process ID: 30283
Started process Id
Process Id 30284 is running
Command used /usr/local/php5-fcgi/bin/php process1.php
Process Id 30284 is running
Command used /usr/local/php5-fcgi/bin/php process1.php
Process Id 30284 is running
Command used /usr/local/php5-fcgi/bin/php process1.php
Process Id 30284 is running
Command used /usr/local/php5-fcgi/bin/php process1.php
Process Id 30284 is running
Command used /usr/local/php5-fcgi/bin/php process1.php
Process Id 30284 is running
Command used /usr/local/php5-fcgi/bin/php process1.php
Process Id 30284 is running
Command used /usr/local/php5-fcgi/bin/php process1.php
Process Id 30284 is running
Command used /usr/local/php5-fcgi/bin/php process1.php
Process Id 30284 is running
Command used /usr/local/php5-fcgi/bin/php process1.php
Process Id 30284 is running
Command used /usr/local/php5-fcgi/bin/php process1.php
Process 30284 is running
Process 30284 is running
Process 30284 is running
Process 30284 is running
Process 30284 is running
Child process 30284 should run in 100 seconds before it can exit.
------------------------------------------------------------------------
[2010-05-17 08:51:20] pcdinh at gmail dot com
Description:
------------
I write a script that is able to launch another process which runs in
100 seconds
The master process will check the child process in a loop to see if it
is still running.
The child process is able to launch and run correctly. However, when I
asign the resource returned by proc_get_status() to an array and return
that array from a function, proc_get_status() does not work correctly
any more. It caused the child process exit right after the first call.
Called in the same scope
========================
$process = proc_open('/usr/local/php5-fcgi/bin/php process1.php',
$descriptors, $pipes);
// $process and proc_get_status() in same scope ==> OK
$status = proc_get_status($process);
if (true === $status['running'])
{
echo "Started process Id\n";
}
else
{
echo "Unable to start a process\n";
}
Called from different scope and against a reference
===================================================
Return from a function
======================
return array(
'pid' => $status['pid'],
'handle' => $process
);
Called against a reference
==========================
foreach ($running as $pid => $info)
{
// first call will cause child process exit after that
$status = proc_get_status($info['handle']);
sleep(1);
}
Test script:
---------------
You can read the sample code here: http://gist.github.com/403467
It contains 2 files: a master process named test3.php and a child
process named process1.php
Expected result:
----------------
[r...@clipserver test]# ./test3.php
Parent process ID: 30283
Started process Id
Process Id 30284 is running
Command used /usr/local/php5-fcgi/bin/php process1.php
Process Id 30284 is running
Command used /usr/local/php5-fcgi/bin/php process1.php
Process Id 30284 is running
Command used /usr/local/php5-fcgi/bin/php process1.php
Process Id 30284 is running
Command used /usr/local/php5-fcgi/bin/php process1.php
Process Id 30284 is running
Command used /usr/local/php5-fcgi/bin/php process1.php
Process Id 30284 is running
Command used /usr/local/php5-fcgi/bin/php process1.php
Process Id 30284 is running
Command used /usr/local/php5-fcgi/bin/php process1.php
Process Id 30284 is running
Command used /usr/local/php5-fcgi/bin/php process1.php
Process Id 30284 is running
Command used /usr/local/php5-fcgi/bin/php process1.php
Process Id 30284 is running
Command used /usr/local/php5-fcgi/bin/php process1.php
Process 30284 is running
Caught a SIGCHLD signal, a worker process exiting
Child process 30284 exited with status 0
Command used
Termination signal:
Is stopped:
Stop signal:
Process 30284 is not running
Process 30284 is not running
Process 30284 is not running
Actual result:
--------------
[r...@clipserver test]# ./test3.php
Parent process ID: 30283
Started process Id
Process Id 30284 is running
Command used /usr/local/php5-fcgi/bin/php process1.php
Process Id 30284 is running
Command used /usr/local/php5-fcgi/bin/php process1.php
Process Id 30284 is running
Command used /usr/local/php5-fcgi/bin/php process1.php
Process Id 30284 is running
Command used /usr/local/php5-fcgi/bin/php process1.php
Process Id 30284 is running
Command used /usr/local/php5-fcgi/bin/php process1.php
Process Id 30284 is running
Command used /usr/local/php5-fcgi/bin/php process1.php
Process Id 30284 is running
Command used /usr/local/php5-fcgi/bin/php process1.php
Process Id 30284 is running
Command used /usr/local/php5-fcgi/bin/php process1.php
Process Id 30284 is running
Command used /usr/local/php5-fcgi/bin/php process1.php
Process Id 30284 is running
Command used /usr/local/php5-fcgi/bin/php process1.php
Process 30284 is running
Caught a SIGCHLD signal, a worker process exiting
Child process 30284 exited with status 0
Command used
Termination signal:
Is stopped:
Stop signal:
Process 30284 is not running
Process 30284 is not running
Process 30284 is not running
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/bug.php?id=51836&edit=1
