made a lot of changes

lang/cem/libcc.ansi/stdio/isatty.c

@@ -0,0 +1,17 @@
+/*
+ * isatty - check if a file descriptor is associated with a terminal
+ */
+/* $Header$ */
+
+int gtty(int d, char *buf);
+
+int isatty(int d)
+{
+	char buf[128]; 
+	/* not a sgttyb struct; it might not be large enough;
+	   I know for a fact that it isn't large enough on PC/IX,
+	   where gtty is an ioctl(..., TCGETA, ...)
+	*/
+
+	return gtty(d, buf) >= 0;
+}