Well, the idea is: if program is started with userid N != 0, what are the ways it can access the information, it is supposed to be forbidden to access in a normal Linux configuration (other users info)? As you might think, I am not really sure of what I need other than a way to forbid all the users access to other users files unless they are in a group and permissions allow it. Many wild things can happen, I just think, this might be a good place where I could ask.
For example: I install mailserver or run samba on a server, where some other things are going on and I totally don't want them to interfare in any possible way unless it has been intended. Hope, I made it clear enough... Jan
