Edit report at https://bugs.php.net/bug.php?id=61873&edit=1
ID: 61873
Comment by: phpmpan at mpan dot pl
Reported by: dcb at insomniacsoft dot com
Summary: proc_get_status always returns exitcode -1
Status: Open
Type: Bug
Package: Program Execution
Operating System: Linux
PHP Version: 5.4.1
Block user comment: N
Private report: N
New Comment:
"and you the code is executing it. In other"
should be:
"and the code is executing it. In the other"
Sorry
Previous Comments:
------------------------------------------------------------------------
[2012-05-01 00:27:25] phpmpan at mpan dot pl
Since no one was able to reproduce this to this point, all that can be done is
debugging it somehow on your side and eliminate possible reasons.
What strace output tells us here is that "/tmp/te" actually exists and you the
code is executing it. In other case the second call to `execve` would not
return 0. If it is returning 0, it means that the interpretation of "/tmp/te"
has actually started.
He's my output for comparison (snaps for 5.4 and trunk):
-------------------------------
[pid 7359] execve("/bin/sh", ["sh", "-c", "/tmp/te"], [/* 47 vars */]
<unfinished ...>
[pid 7359] execve("/tmp/te", ["/tmp/te"], [/* 46 vars */]) = 0
[pid 7359] open("/tmp/te", O_RDONLY) = 3
write(1, "/tmp/te", 7/tmp/te) = 7
-------------------------------
What is puzzling me is why your `sh` (pid:26199) is not replacing itself with
the script. As we can see, another process (pid:26200) is spawned and it is the
one that executes your script. My blind guess is that PHP receives status code
from 26199, which - for some reason - is not waiting for 26200 or not passing
the status code from it properly.
Can you check what is this producing?
-------------------------------
sh -c /tmp/te
echo $?
-------------------------------
Maybe the bug is not in PHP...
------------------------------------------------------------------------
[2012-04-30 23:24:42] dcb at insomniacsoft dot com
Still getting -1 for /bin/ls as well
I did the strace, here is output, unfortunately I have no idea how to interpret
it:
[pid 26199] execve("/bin/sh", ["sh", "-c", "/tmp/te"], [/* 19 vars */]
<unfinished
...>
[pid 26200] execve("/tmp/te", ["/tmp/te"], [/* 19 vars */]) = 0
[pid 26200] open("/tmp/te", O_RDONLY) = 3
write(1, "/tmp/te", 7/tmp/te) = 7
------------------------------------------------------------------------
[2012-04-29 06:36:21] phpmpan at mpan dot pl
Maybe strace shows something interesting?
strace -f php -r '$descriptorspec = array(
0 => array("pipe", "r"),
1 => array("pipe", "w"),
2 => array("file", "/tmp/error-output.txt", "a")
);
$p = proc_open("/tmp/te", $descriptorspec, $pipes, "/tmp");
sleep(1);
fclose($pipes[0]);fclose($pipes[1]);
$s = proc_get_status($p);
print_r($s);' 2>&1 | grep '/tmp/te'
------------------------------------------------------------------------
[2012-04-29 03:51:46] [email protected]
what about call "/bin/ls" instead of /tmp/te?
------------------------------------------------------------------------
[2012-04-29 00:18:47] dcb at insomniacsoft dot com
I've checked that, the script executes fine and besides I actually discovered
the
issue while working with the symfony/Process classes. On php 5.3.6 all the
tests
pass, but on the same machine, with the same config (just different paths) all
versions starting from 5.4.0 fail the symfony/Process unit tests related to the
exit code.
------------------------------------------------------------------------
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