{
sigset_t unblocked;
sigemptyset (&unblocked);
-#ifdef SIGIO
+#ifdef USABLE_SIGIO
sigaddset (&unblocked, SIGIO);
#endif
sigaddset (&unblocked, SIGALRM);
fcntl (connection, F_SETOWN, getpid ());
#endif /* ! defined (F_SETOWN) */
-#ifdef SIGIO
if (interrupt_input)
init_sigio (connection);
-#endif /* ! defined (SIGIO) */
#ifdef USE_LUCID
{