On Wed, 18 Jul 2007, Luke Mewburn wrote:
> 	/* Reset to default signal handler, clear mask, raise signal */
> 	memset(&act, 0, sizeof(act));
> 	act.sa_handler = SIG_DFL;
> 	if ((sigemptyset(&act.sa_mask) == 0) &&
> 	    (sigemptyset(&mask) == 0) &&
> 	    (sigaddset(&mask, sig) == 0) &&
> 	    (sigaction(sig, &act, NULL) == 0) &&
> 	    (sigprocmask(SIG_UNBLOCK, &mask, 0) == 0))
> 		raise(sig);

So if sigaction() succeeds but sigprocmask() fails, we don't
raise(sig).  Would it be more useful to raise(sig) regardless of
whether sigprocmask() succeeds?

--apb (Alan Barrett)