$NetBSD: patch-ac,v 1.5 2000/02/05 06:56:16 wiz Exp $
--- name.c.orig	Fri May  7 00:57:30 1999
+++ name.c	Fri May  7 00:58:04 1999
@@ -25,6 +25,7 @@
 
 #include "mkisofs.h"
 
+#include <stdlib.h>
 #include <ctype.h>
 
 extern int allow_leading_dots;
@@ -58,6 +59,7 @@
   const char	* pnt;
   int		  priority	   = 32767;
   char		* result;
+  char		* copy;
   int		  seen_dot	   = 0;
   int		  seen_semic	   = 0;
   int		  tildes	   = 0;
@@ -105,13 +107,17 @@
   last_dot = strrchr (pnt,'.');
   if(    (last_dot != NULL)
       && (    (last_dot[1] == '~')
-	   || (last_dot[1] == '\0')
 	   || (last_dot[1] == '\0')) )
     {
-      c = last_dot;
-      *c = '\0';
+      /*
+       * We gotta copy the string first, to work around its constness.
+       */
+      copy = alloca (strlen(name) + 1);
+      memcpy (copy, name, strlen(name) + 1);
+      pnt = copy;
+      last_dot = strrchr (pnt,'.');
+      *last_dot = '\0';
       last_dot = strrchr (pnt,'.');
-      *c = '.';
     }
 
   while(*pnt)