sharutils 4.5: Fix memory corruption with "shar ."

[Andreas Schwab]

Don't write beyond the bounds of the allocated memory.

Andreas.

2005-08-10  Andreas Schwab  <address@hidden>

        * shar.c (walkdown): Don't let restore_name_length become
        negative.

--- src/shar.c
+++ src/shar.c
@@ -382,14 +382,9 @@
        /* Avoid restoring `./xxx' when shar'ing `.'.  */
 
        if (!strncmp (restore_name_copy, "./", 2))
-         {
-           const char *rp = restore_name_copy + 2;
-           char *wp = restore_name_copy;
-           while ((*wp++ = *rp++));
-           restore_name_length -= 2;
-         }
-
-       status = walkdown (routine, local_name_copy, restore_name_copy);
+         status = walkdown (routine, local_name_copy, restore_name_copy + 2);
+       else
+         status = walkdown (routine, local_name_copy, restore_name_copy);
       }
 
   /* Clean up.  */

-- 
Andreas Schwab, SuSE Labs, address@hidden
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
Key fingerprint = 58CA 54C7 6D53 942B 1756  01D3 44D5 214B 8276 4ED5
"And now for something completely different."