From: andy dot shellam at mailnetwork dot co dot uk
Operating system: Unix (FreeBSD)
PHP version: 5.2.1
PHP Bug Type: POSIX related
Bug description: proc_get_status - PID is -1 out
Description:
------------
proc_get_status when run with a proc_open'd resource returns a PID that is
one less than shown in ps output.
E.g. to kill a process opened by proc_open, you need to add 1 to the PID
returned by proc_get_status for it to work.
This is because proc_get_status returns the PID of the shell that then
runs the command - not the command process itself.
Reproduce code:
---------------
Create a bash script that loops endlessly to simulate a long-running:
#!/usr/local/bin/bash
while [ 0 -eq 0 ]; do
let 0
done
In PHP, run this script (from CLI):
#!/usr/local/php/bin/php
<?php
$descriptorspec = array(
0 => array("pipe", "r"), // stdin is a pipe that the child will read
from
1 => array("pipe", "w"), // stdout is a pipe that the child will write
to
2 => array("file", "/tmp/error-output.txt", "a") // stderr is a file to
write to
);
$cwd = '/tmp';
$env = array('some_option' => 'aeiou');
$process = proc_open('/tmp/loop.sh', $descriptorspec, $pipes, $cwd, $env,
Array("bypass_shell" => TRUE));
if (is_resource($process)) {
$procinfo = proc_get_status($process);
echo "Opened process ID is: " . $procinfo['pid'] . "\n";
}
?>
Expected result:
----------------
Opened process ID is: 40609
(from ps output):
[EMAIL PROTECTED] ~]$ sudo ps auxwww|grep loop.sh
root 40609 48.2 0.2 3036 1672 p0 R+ 1:06PM 0:05.94
/usr/local/bin/bash /tmp/loop.sh
root 40608 0.0 0.1 1632 988 p0 S+ 1:06PM 0:00.00 sh -c
/tmp/loop.sh
Actual result:
--------------
Opened process ID is: 40608
[EMAIL PROTECTED] ~]$ sudo ps auxwww|grep loop.sh
root 40609 48.2 0.2 3036 1672 p0 R+ 1:06PM 0:05.94
/usr/local/bin/bash /tmp/loop.sh
root 40608 0.0 0.1 1632 988 p0 S+ 1:06PM 0:00.00 sh -c
/tmp/loop.sh
As you can see, the PID returned by proc_get_info is the shell that is
then used to start the actual command - if you kill the shell's PID, the
command carries on running. Kill the shell PID+1, and it kills both off.
This is similar to http://bugs.php.net/bug.php?id=40070, however the
bypass_shell does not work on Unix.
--
Edit bug report at http://bugs.php.net/?id=41003&edit=1
--
Try a CVS snapshot (PHP 4.4):
http://bugs.php.net/fix.php?id=41003&r=trysnapshot44
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=41003&r=trysnapshot52
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=41003&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=41003&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=41003&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=41003&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=41003&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=41003&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=41003&r=support
Expected behavior: http://bugs.php.net/fix.php?id=41003&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=41003&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=41003&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=41003&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=41003&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=41003&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=41003&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=41003&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=41003&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=41003&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=41003&r=mysqlcfg
