--- dip-3.3.7o/main.c.orig	Wed Aug 28 16:50:42 1996
+++ dip-3.3.7o/main.c	Wed Aug 28 16:55:13 1996
@@ -428,7 +428,6 @@
   strncpy(path, argv[optind], sizeof(path) - sizeof(DIP_SFX) + 1);
   if ((sp = strrchr(path, '/')) != (char *)NULL) sp++;
     else sp = path;
-  if (strchr(sp, '.') == (char *)NULL) strcat(path, DIP_SFX);
 
   /* set euid to ruid */
   if (setreuid(geteuid(), getuid()) != 0){
@@ -438,8 +437,11 @@
   }
   /* open file with real uid */
   if ((fp = fopen(path, "r")) == (FILE *)NULL) {
-	fprintf(stderr, "dip: %s: %s\n", path, strerror(errno));
-	exit(-1);
+	if (strchr(sp, '.') == (char *)NULL) strcat(path, DIP_SFX);
+	if ((fp = fopen(path, "r")) == (FILE *)NULL) {
+		fprintf(stderr, "dip: %s: %s\n", path, strerror(errno));
+		exit(-1);
+	}
   }
   /* set uids back */
   if (setreuid(geteuid(), getuid()) != 0){