+/*
+ * The following little dance copes with the new USG tty handling.
+ * This stuff has the advantage of considerable flexibility, and
+ * the disadvantage of being incompatible with anything else.
+ * The presence of the symbol USG3TTY will indicate the new code:
+ * in this case, we define CBREAK (because we can simulate it exactly),
+ * but we won't actually use it, so we set it to a value that will
+ * probably blow the compilation if we goof up.
+ */
+#ifdef USG3TTY
+#include <termio.h>
+#define CBREAK xxxxx
+#else
+#include <sgtty.h>
+#endif
+