Wait for and/or kill process grandchildren produced by fork

Question

I fork() into process X and Y, afterwards Y forks() again into itself and process Z multiple times.

Now process Y is some kind of \"listene

Answer 1

This is not supported. If your sole intent is to prevent the 'Z' processes (i.e., the grandchildren) from turning into zombies, you can use setsid(). If you actually need their exit status, however, you really need to reap them from the 'Y' processes.