Permissions and jar file locations for php exec on apache

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I'm setting up a small experiment on a Linux machine running MariaDB, Apache, Java and PHP... and after playing around all day with this and searching on this topic - I need some further clarification on some permissions and locations. But let me first frame this:

In my web directory: /var/www/html I have a small test program: test.php. It basically does this:

<?php
    exec("java -jar MyApp.jar", $output);
    print_r($output);
?>

the MyApp.jar is a simple java application that connects to the local MariaDB and returns some useful information retrieved from the DB.

My main question is: where should my .jar files be and how do I make sure I execute the correct jar from php (how to reference it? full path?) and how/where/what else do I need to modify....

To try and expand this some more: 1) where should I put the MyApp.jar? Currently I have it in the /var/www/html dir with the test.php - however, I don't want it there. I'd rather put it somewhere safe so it cannot be accessed externally. I've seen mention of putting it down a level from the http root, etc. but I'd like more clarity as to what else needs to happen.

Should I simply put it outside wherever I want it - say in my home directory? If so do i need to modify the exec path location? Edits to httpd.conf? other files, etc. Ownerships, etc.? I'm a bit confused.

2) Ideally I also want to link the mariaDB java jar library (for the driver connector). Again, I want to put that in a safe place. Currently, httpd I don't believe can access this via the .jar manifest CLASSPATH as it doesn't have permission to grab the jar library from its current location. So again, I think I have a permission/location issue with this file as well. I think the answer to 2 will be the same as 1?

My jar manifest is:

Mainfest-version: 1.0
Main-Class: MyApp
Class-Path: /home/ramjet/MyApp/lib/mariadb-java-client-1.1.7.jar . MyApp.jar

httpd can't get to the connector here. And I don't think it should be here anyway.

Thanks in advance

asked 57 secs ago

Ramjet

8

Permissions and jar file locations for php exec on apache