--- ray/src/rt/duphead.c	1993/09/21 10:58:22	2.2
+++ ray/src/rt/duphead.c	2003/02/25 02:47:22	2.4
@@ -1,13 +1,14 @@
-/* Copyright (c) 1993 Regents of the University of California */
-
 #ifndef lint
-static char SCCSid[] = "$SunId$ LBL";
+static const char	RCSid[] = "$Id: duphead.c,v 2.4 2003/02/25 02:47:22 greg Exp $";
 #endif
-
 /*
  * Duplicate header on stdout.
+ *
+ * Externals declared in ray.h
  */
 
+#include "copyright.h"
+
 #include  "standard.h"
 #include  "paths.h"
 
@@ -18,17 +19,19 @@ static char  *headfname = NULL;	/* temp file name */
 static FILE  *headfp = NULL;	/* temp file pointer */
 
 
+void
 headclean()			/* remove header temp file (if one) */
 {
-	if (headfname != NULL) {
-		if (headfp != NULL)
-			fclose(headfp);
-		if (headismine)
-			unlink(headfname);
-	}
+	if (headfname == NULL)
+		return;
+	if (headfp != NULL)
+		fclose(headfp);
+	if (headismine)
+		unlink(headfname);
 }
 
 
+void
 openheader()			/* save standard output to header file */
 {
 	static char  template[] = TEMPLATE;
@@ -41,6 +44,7 @@ openheader()			/* save standard output to header file 
 }
 
 
+void
 dupheader()			/* repeat header on standard output */
 {
 	register int  c;