#47566 [Bgs]: PCNTL Waitpid exit status incorrect
| From: | james at jamesreno dot com | Date: | Thu, 05 Mar 2009 20:54:54 +0000 |
| Subject: | #47566 [Bgs]: PCNTL Waitpid exit status incorrect | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-134446@lists.php.net to get a copy of this message | ||
ID: 47566
User updated by: james at jamesreno dot com
Reported By: james at jamesreno dot com
Status: Bogus
Bug Type: PCNTL related
Operating System: linux-2.6
PHP Version: 5.2.9
New Comment:
exit(254);
$pid = pcntl_waitpid(-1,$status);
if (pcntl_wifexited($status)) {
$status = pcntl_wexitstatus($status);
echo $status;
}
Then why is $status, -2 rather than '254'?
This method does not seem work *properly* either...
Previous Comments:
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[2009-03-04 23:11:46] felipe@php.net
You need to use the pcntl_wexitstatus().
http://docs.php.net/manual/en/function.pcntl-wexitstatus.php
http://www.mkssoftware.com/docs/man3/waitpid.3.asp
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[2009-03-04 21:59:01] james at jamesreno dot com
Description:
------------
The $status exitcode returned by pcntl_waitpid() is incorrectly casted
resulting in an invalid number being returned.
I believe the int is converted to a long in ext/pcntl/pcntl.c,
resulting in an invalid integer being returned to the parent.
zval *z_status = NULL;
int status;
convert_to_long_ex(&z_status);
status = Z_LVAL_P(z_status);
child_id = waitpid((pid_t) pid, &status, options);
Z_LVAL_P(z_status) = status;
z_status is a long, but status is an int...
Reproduce code:
---------------
<?
$pid = pcntl_fork();
if ($pid == -1) {
echo "Unable to fork";
exit;
} elseif ($pid) {
$epid = pcntl_waitpid(-1,$status);
echo "PARENT: {$pid}/{$epid} exited {$status}\n";
exit(128);
} else {
echo "CHILD: Exiting with exit code 128\n";
exit(128);
}
?>
Expected result:
----------------
[james@localhost ~]$ php test.php
CHILD: Exiting with exit code 128
PARENT: 7598/7598 exited 128
[james@localhost ~]$ echo $?
128
[james@localhost ~]$
Actual result:
--------------
[james@localhost ~]$ php test.php
CHILD: Exiting with exit code 128
PARENT: 7598/7598 exited 32768
[james@localhost ~]$ echo $?
128
[james@localhost ~]$
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/?id=47566&edit=1