In man-pages 3.58, sigvec(3) contains this example of sigmask: vec.sv_mask = sigmask(SIGQUIT) | sigpause(SIGABRT); /* Block SIGQUIT and SIGABRT during handler execution */ The second call should be sigmask(SIGABRT). -- To unsubscribe from this list: send the line "unsubscribe linux-man" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html