Shell_exec On LightTPD

Sep 30, 2007

I've got a very simple script with shell_exec that's giving me a headache! My server is a NetBSD machine running LightTPD (1.4.8nb1) and php (5.1.1nb2).

I've got the file dummy.php with the following content:

<?php
error_reporting(E_ALL);
$res = shell_exec("pwd 2>&1");
echo $res;
?>

When I access this file through a browser i can't see any output:

http://my.url/dummy.php results in a blank page that loads in no time! No error messages, neither output by the browser or in the log files (php.log and LightTPD's error.log).

When I use the terminal on the servern it all works fine:

php /path/to/wwwroot/dummy.php gives me the working directory. Doesn't matter from which working directory I execute the command, or which user (I've tried the LightTPD user aswell). It works every time!

safe_mode is off and there are no disabled_functions!

I've asked around in LightTPD forums, but they say it's a PHP problem. So, I've asked around in (other) PHP forums but noone seems to have any ideas how to solve this!
Perhaps there are expert users here that can help me, or at least redirect me to some other expert forum.

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[Code]...

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I have an ensim server which provides me with about 20 scripts in the filesystem that allows you to create sites, edit them, lookup domains, etc... I am running a few of these scripts from a cron I made and that all works fine but I can't seem to find a function (like shell_exec) that allows me to get the text returned from the function. When I run the script from CLI and i run the script using either system(), exec(), passthru(), or shell_exec() it just displays the results, and I didn't tell it to, it just does it on it's own bit. My question is how can i trap the results so I can anylize them.

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Jul 17, 2005

I'm trying to 'ssh' into another machine, run a small script and fetch
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Problem two: To be able to establish a password-less ssh connection, I
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Mar 7, 2006

I have the following script:

$c_path = "/absolute_path_to_some_directory";
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Mar 1, 2007

I want to copy file from remote machine to local machine using PHP. On both machines Linux operating system present. The code is.

$result=shell_exec("scp admin@192.168.1.236:/mnt/disc/hda/part1/demo/
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Feb 19, 2010

I have a PHP script that uses shell_exec to run a pdf-to-text converter. To simplify the problem I've created a short script that uses shell_exec to just echo the output of the dir command.

<?php
$cmd = 'C:\WINDOWS\system32\cmd.exe /c ';
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When I run this on my Apache server, everything works as expected. When I switch to IIS, it's as though the line is skipped entirely: no errors, no output, no logs, no nothing.

Unfortunately, I need to use IIS because I'm going to authenticate my users against active directory.

Here's what I've tried so far:

Issue the command through cmd.exe /c rather than issuing it directly
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Give Read & Execute permission to IUSR_MACHINENAME on "C:WINDOWSsystem32cmd.exe"
Give Read & Execute permission to Everyone on "C:WINDOWSsystem32cmd.exe" (don't worry, it didn't stay like that for long, haha) Run PHP as an ASAPI module

This is my standard configuration

Run PHP as a CGI extention

This does not work, I get an error: CGI Error The specified CGI application misbehaved by not returning a complete set of HTTP headers.

In IIS Manager, set Execute Permissions to Scripts and Executables on your website
Added html markup and other php functions to script to see if that gets processed; it does. It's as if the shell_exec bit just gets skipped.

Update 1

I really didn't want to do this, but as a stop gap until I find a proper solution I'm running Apache on the web server (which runs shell_exec fine) and I call my apache script via cURL. It's ugly, but it works :).

Update 2

I'm beginning to think this isn't so much an issue with IIS or permissions as such, but perhaps a result of some policy we have on our network - although I can't imagine what.

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Sep 11, 2007

I've looked at the php documentation for openSSL, but found that the module seemed insufficient for purposes like checking a certificate's expiration date on another server. That is, I could not find a function to run "openssl s_client -connect", so I decided to instead achieve it through shell_exec.
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Mar 10, 2006

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Nov 16, 2006

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Is there any way to tell if shell_exec is actually doing anything? I have it working fine for simple things like cd and ls but when I tried to do something a little more complicated it doesn't look like it's doing anything. Here's one such command that's not working

Code:
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I'm guessing the network guys have done something to the security of
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When I run docpull.php through the web server I get to the expect call
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I believe that its an environment issue regarding how php is run through
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Permissions don't seem to be a problem because I've set up all of the
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I'm reaching at this point. Because of another server limitation I'm
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I'm on slackware linux 10.2

Apache/1.3.33 (Unix)

PHP 4.4.1 (cli) (built: Dec 21 2005 03:44:49)
Copyright (c) 1997-2004 The PHP Group
Zend Engine v1.3.0, Copyright (c) 1998-2004 Zend Technologies
with Xdebug v2.0.0beta5, Copyright (c) 2002, 2003, 2004, 2005, by
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// or exec("./cat ./test", $lines, $result);
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run.php
<?php
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?>

[code]....

I execute run.php from the browser [URL] Then I typed: ps aux | grep php

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username 27272 0.0 1.5 89504 64468 ? R 17:33 0:00 php theprocess.php
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[code]....

I dont understand why is it showing more than 1 theprocess.php process? Also why it still running at the background? it should terminate theprocess.php finish the task.

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