Also, you may already know this, but if you use the non-blocking accept, I believe you can check $! for EAGAIN (or EWOULDBLOCK on BSD and perhaps other systems) to check whether there are no connection requests (as opposed to accept just failing for some other reason). Maybe not on your system, though...

As an aside: I know it's quite annoying to be pointed towards man pages that you don't have on your system... here's a good source of man pages for OpenBSD, and here's some docs (in troff source) for Unix Version 7.