Actually, the POSIXly correct way of sending a signal is with the use of sigqueue() which should give some interesting benefits over your generic kill(). I realize that it hasn't really caught on but considering that I'm supposed to be a POSIX professional programmer dude, I thought i just might share that with you. Anyway, I DO use sigqueue because the receiver gets a nifty struct of info (especially useful with IPC, specifically mesgqs). Just a quick comment...