#define sigblockx(sig) sigblock (sigmask (sig))
#define sigunblockx(sig) sigunblock (sigmask (sig))
#define sigpausex(sig) sigpause (0)
-#endif /* BSD4_1 */
+#endif /* not BSD4_1 */
#ifdef BSD4_1
#define SIGIO SIGTINT
#define sigblockx(sig) sighold (sig)
#define sigunblockx(sig) sigrelse (sig)
#define sigpausex(sig) sigpause (sig)
-#endif /* ! defined (BSD4_1) */
+#endif /* BSD4_1 */
/* On bsd, [man says] kill does not accept a negative number to kill a pgrp.
Must do that using the killpg call. */