--- ray/src/rt/rcmain.c	2023/02/06 20:34:17	2.25
+++ ray/src/rt/rcmain.c	2023/02/24 18:25:36	2.28
@@ -1,5 +1,5 @@
 #ifndef lint
-static const char	RCSid[] = "$Id: rcmain.c,v 2.25 2023/02/06 20:34:17 greg Exp $";
+static const char	RCSid[] = "$Id: rcmain.c,v 2.28 2023/02/24 18:25:36 greg Exp $";
 #endif
 /*
  *  rcmain.c - main for rtcontrib ray contribution tracer
@@ -197,10 +197,14 @@ main(int argc, char *argv[])
 	gargc = argc;
 					/* feature check only? */
 	strcat(RFeatureList, RCONTRIB_FEATURES);
-	if (argc == 2 && !strcmp(argv[1], "-features"))
+	if (argc > 1 && !strcmp(argv[1], "-features"))
 		return feature_status(argc-2, argv+2);
 #if defined(_WIN32) || defined(_WIN64)
-	_setmaxstdio(2048);		/* increase file limit to maximum */
+
+#if defined(_WIN32) || defined(_WIN64) 	/* increase file limit to maximum */
+	for (i = 8192; i > _IOB_ENTRIES; i >>= 1)
+		if (_setmaxstdio(i) == 0)
+			break;
 #endif
 					/* initialize calcomp routines early */
 	initfunc();
@@ -402,7 +406,7 @@ badopt:
 
 void
 wputs(				/* warning output function */
-	char	*s
+	const char	*s
 )
 {
 	int  lasterrno = errno;
@@ -413,7 +417,7 @@ wputs(				/* warning output function */
 
 void
 eputs(				/* put string to stderr */
-	char  *s
+	const char  *s
 )
 {
 	static int  midline = 0;