--- dir-renamed.c	2002-10-11 18:59:59.000000000 +0100
+++ dir-renamed.c.new	2002-10-11 18:59:59.000000000 +0100
@@ -109,6 +109,12 @@
   /* Now we can safely lock fnp */
   mutex_lock (&fnp->lock);
 
+  /* Make sure the source's parent directory is writable. */
+  err = fshelp_checkdirmod (&fdp->dn_stat, &fnp->dn_stat, fromcred->user);
+
+  if (err)
+    goto out;
+
   if (tnp)
     {
       if (! S_ISDIR(tnp->dn_stat.st_mode))