How stop call to System.exit but allow them to install Securitymanager?

I have an application that allows you to start a java application from inside it (it then gives you monitoring capabilities). I want this to work with pretty much any desktop application, even those that require their own security manager. However, i don't want their application to be able to shutdown the jvm. How can I do this?
As far as I can tell, there's no way to allow them to add the securitymanager, "wrapped" by mine is there?
And I thought of using AccessController.doPriviledgedAction(...) and giving them a context where they can add a security manager but not call system.exit, but then if they do add a security manager, won't it have the final say on system.exit calls?
Is there a solution here?

6tr6tr wrote:
Thanks for the reply!
Hmmm, the problem with that is I need the users to be able to use my application without access to that app's source code. So they need to be able to run that program (as 3rd party black-boxed code) inside my app and still have this work properly. Is there another way?
Source code?
You don't need any source code for what I suggested.
If a frame/jframe tries to exit on close, I can grab and stop that. my problem is if some random code tries to call system.exit(). Is there any other way to intercept it?
UPDATE: the only solution i could come up with is to use bytecode engineering + classloading.
Which I doubt will help if they call it with reflection.
You could use the bootstrap command line options and replace System with your own version. Add some functionality to how it sets up the security manager and/or make System.exit() do nothing, but provide another name for yourself.

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