#41874 [Opn->Fbk]: php (CLI) exec function passes no stderr output

From: Date: Wed, 18 Jul 2007 08:45:45 +0000
Subject: #41874 [Opn->Fbk]: php (CLI) exec function passes no stderr output
References: 1  Groups: php.bugs 
Request: Send a blank email to php-bugs+get-115163@lists.php.net to get a copy of this message 
 ID:               41874
 Updated by:       jani@php.net
 Reported By:      ckeefer at us dot nomura dot com
-Status:           Open
+Status:           Feedback
 Bug Type:         CGI related
 Operating System: Windows XP Pro SP2
 PHP Version:      5.2CVS-2007-07-03
 New Comment:

This works fine with *nix (found from the user comments at
http://www.php.net/manual/en/function.exec.php
:

<?php

$com= "ls foo";

exec("$com 2>&1", $out, $err);

var_dump($out);

?>

I don't know if Windows supports something like this, but iirc, it
should.



Previous Comments:
------------------------------------------------------------------------

[2007-07-03 12:56:37] ckeefer at us dot nomura dot com

Thank you for the quick response.  The new version still shows no
STDERR output from a cmd.exe window.

Thanks

C:\php5.2fix>php test_exec.php
Two exec statements:
-------------------
This exec should result in error for non-existant dir:
Array
(
)
-----------------------
This exec works:
--------------------
Array
(
    [0] =>  Volume in drive C is LOCAL DISK
    [1] =>  Volume Serial Number is 4054-8345
    [2] =>
    [3] =>  Directory of C:\php5.2fix
    [4] =>
    [5] => 07/03/2007  08:08 AM            32,821 php.exe
    [6] =>                1 File(s)         32,821 bytes
    [7] =>                0 Dir(s)  58,549,849,088 bytes free
)

C:\php5.2fix>
C:\php5.2fix>type test_exec.php
<?php
echo "Two exec statements:\n-------------------\n";
echo "This exec should result in error for non-existant dir:\n";
exec("cd c:\\non_existant", $err);
print_r($err);
echo "-----------------------\n";
echo "This exec works:\n--------------------\n";
exec("dir php.exe", $ary);
print_r($ary);
?>

------------------------------------------------------------------------

[2007-07-03 06:41:22] tony2001@php.net

Please try using this CVS snapshot:

  http://snaps.php.net/php5.2-latest.tar.gz
 
For Windows (zip):
 
  http://snaps.php.net/win32/php5.2-win32-latest.zip

For Windows (installer):

  http://snaps.php.net/win32/php5.2-win32-installer-latest.msi



------------------------------------------------------------------------

[2007-07-02 18:39:25] ckeefer at us dot nomura dot com

Description:
------------
PHP CLI version 5.1.8 thru 5.2.1 Windows Binary - exec() function, when
error is generated passes STDERR no problem to CLI window.  5.2.2+
STDERR output has vanished.  Nothing in documentation or search suggests
what happened.  No other changes 5.2.1 just downloaded and tested with
generic setup (no php.ini or other modifications) stderr from exec()
functions perfectly.  5.2.2+ system() apparently passes stderr properly,
but is not useful for most of what we do. STDOUT appears to be fine all
versions.

Oddly, 5.2.2+ versions still work correctly with cygwin/bash 3.1

Note in 5.2.2 changelog contains this bit:
- Fixed commandline handling for CLI and CGI. (Marcus, Johannes)


Thanks,

Chip Keefer

Reproduce code:
---------------
<?php
$result = exec('cd c:\non_existant; dir nonexistant');
echo "$result\n";
?>


Expected result:
----------------
NJPC3916:php5.22$ php test_exec.php 
php test_exec.php 
The system cannot find the path specified.

- Works properly with cygwin

Actual result:
--------------
C:\php5.22>php test_exec.php


C:\php5.22>

No STDERR


------------------------------------------------------------------------


-- 
Edit this bug report at http://bugs.php.net/?id=41874&edit=1

Thread (13 messages)

« previous php.bugs (#115163) next »