[catern]

I think you may have misunderstood the problem that this article is solving.

You've implemented something which kills all your child processes when you exit cleanly, but which leaks child processes if you exit uncleanly. This is, frankly, easy to do, and not interesting. It's not a "problem".

The article is solving the problem of: how do I make sure my child processes die even if I exit uncleanly? That's an actual hard problem to solve.