--- ray/src/px/ra_bn.c	1991/11/12 16:05:07	2.1
+++ ray/src/px/ra_bn.c	1992/10/30 09:11:35	2.5
@@ -1,4 +1,4 @@
-/* Copyright (c) 1991 Regents of the University of California */
+/* Copyright (c) 1992 Regents of the University of California */
 
 #ifndef lint
 static char SCCSid[] = "$SunId$ LBL";
@@ -12,13 +12,19 @@ static char SCCSid[] = "$SunId$ LBL";
 
 #include  <stdio.h>
 
+#ifdef MSDOS
+#include  <fcntl.h>
+#endif
+
+#include  <math.h>
+
 #include  "color.h"
 
 #include  "resolu.h"
 
-extern double  atof(), pow();
+extern char  *malloc();
 
-double	gamma = 2.0;			/* gamma correction */
+double	gamcor = 2.0;			/* gamma correction */
 
 int  bradj = 0;				/* brightness adjustment */
 
@@ -37,14 +43,19 @@ char  *argv[];
 {
 	int  reverse = 0;
 	int  i;
-	
+#ifdef MSDOS
+	extern int  _fmode;
+	_fmode = O_BINARY;
+	setmode(fileno(stdin), O_BINARY);
+	setmode(fileno(stdout), O_BINARY);
+#endif
 	progname = argv[0];
 
 	for (i = 1; i < argc; i++)
 		if (argv[i][0] == '-')
 			switch (argv[i][1]) {
 			case 'g':
-				gamma = atof(argv[++i]);
+				gamcor = atof(argv[++i]);
 				break;
 			case 'r':
 				reverse = !reverse;
@@ -60,7 +71,7 @@ char  *argv[];
 		else
 			break;
 						/* set gamma correction */
-	setcolrgam(gamma);
+	setcolrgam(gamcor);
 
 	if (reverse) {
 		if (i > argc-1 || i < argc-2)