$NetBSD: patch-ac,v 1.1.1.1 2000/08/29 10:09:44 jdc Exp $

--- iocntl.c.dist	Mon Mar 21 21:42:49 1994
+++ iocntl.c	Fri Jan  7 11:28:43 2000
@@ -63,7 +63,7 @@
  #ifdef RS6000 /* ibm rs/6000 */
    sigemptyset(&vec.sa_mask);
  #else
-  vec.sa_mask = 0;
+   (void)sigprocmask (SIG_SETMASK, 0, NULL);
  #endif
   vec.sa_flags = 0;
   if ( sigaction(SIGIO, &vec, (struct sigaction *) 0) == -1)