I've been trying to search for a nice, easy-to-read material about signals in C. So far I haven't found anything that could get through my gray brain mass. My university's material gives only a small surface scratch to the topic, and internetz hasn't been able to tell me much so far.

I've mostly interested in signaling between child and parent processes. Just a simple example, I would like to have a child process signal the parent process like "I'm ready to die!" and then the parent process would kill the child process.

Help me, oh mighty Daniweb, show me your materials. :)