groups?

[Alan Peery]

Ivan Cheniot wrote:

> Where does it take the info? Can't find it in the environnement 
> variables.

If it was stored in environment variables, the user would be able to 
change it--which would not be very secure.

This information is stored in the process descriptor.  If you want to 
get a pointer to how it functions, start reading source code for the 
"su" program, and for the getgid() and setgid() system calls.

Alan