Hi, i'm using posix real-time signals for notification of socket events, and sigwaitinfo to get the events. My problem is whenever I receive a real-time signal my app terminates. If I set a signal handler function for the real-time signal, the application does not terminate. But I want to use sigwaitinfo() to get the signal and not a signal handler func.

I understand that an unhandled RT signal causes program termination, so I block the signal using pthread_sigmask()(since i'm running multithreaded) but i'm still getting the signals.

i'm using red hat enterprise 3, can anyone explain why I can't seem to block the RT signals...

Many Thanks!

Since pthread_sigmask() only affects the signal mask of the calling thread, perhaps you have another thread that's running at the time the RT signal arrives that hasn't called pthread_sigmask() appropriately?

thanks mhcox, yup that was my problem, another thread was running an I did not block the signals on that thread. Fixed it now, thanks again !!