Index: ipp.c
===================================================================
--- ipp.c	(revision 6617)
+++ ipp.c	(working copy)
@@ -1296,11 +1296,16 @@
     return (NULL);
   }
 
-  if (!check_quotas(con, printer))
+  if ((i = check_quotas(con, printer)) < 0)
   {
     send_ipp_status(con, IPP_NOT_POSSIBLE, _("Quota limit reached."));
     return (NULL);
   }
+  else if (i == 0)
+  {
+    send_ipp_status(con, IPP_NOT_AUTHORIZED, _("Not allowed to print."));
+    return (NULL);
+  }
 
  /*
   * Create the job and set things up...
@@ -3240,7 +3245,7 @@
       cupsdLogMessage(CUPSD_LOG_ERROR,
                       "Unable to allocate quota data for user \"%s\"!",
                       username);
-      return (0);
+      return (-1);
     }
 
     if ((q->k_count >= p->k_limit && p->k_limit) ||
@@ -3248,7 +3253,7 @@
     {
       cupsdLogMessage(CUPSD_LOG_INFO, "User \"%s\" is over the quota limit...",
                       username);
-      return (0);
+      return (-1);
     }
   }