How does inetd know which process to send incoming data to?

Question

I'm trying to replace a inetd/xinetd service by a standalone one. What is the simplest I can do this? Is there some standard code to get started?

Answer 1

How does inetd know which process to send incoming data to

It spawns it (typically using fork() followed by exec*()), so it has the process-id.

Is there some standard code to get started?

What about xinetd's sources?