Tue Oct 8 13:58:31 1996 Thomas Bushnell, n/BSG <thomas@gnu.ai.mit.edu>

	* hurd/ports-get.c (_hurd_ports_get): If the requested port is
	null, don't attempt mach_port_mod_refs.

diff --git a/hurd/ports-get.c b/hurd/ports-get.c
index e45494a..cdbeacc 100644 (file)
--- a/hurd/ports-get.c
+++ b/hurd/ports-get.c
@@ -1,4 +1,4 @@
-/* Copyright (C) 1994, 1995 Free Software Foundation, Inc.
+/* Copyright (C) 1994, 1995, 1996 Free Software Foundation, Inc.
 This file is part of the GNU C Library.
 
 The GNU C Library is free software; you can redistribute it and/or
@@ -38,9 +38,9 @@ _hurd_ports_get (unsigned int which, mach_port_t *result)
     return EINVAL;
   if (which >= INIT_PORT_MAX || _hurd_ports_getters[which] == NULL)
     return HURD_PORT_USE (&_hurd_ports[which],
-                         __mach_port_mod_refs (__mach_task_self (),
-                                               (*result = port),
-                                               MACH_PORT_RIGHT_SEND,
-                                               +1));
+                         (*result = port) == MACH_PORT_NULL ? 0 
+                         : __mach_port_mod_refs (__mach_task_self (),
+                                                 port, MACH_PORT_RIGHT_SEND,
+                                                 +1));
   return (*_hurd_ports_getters[which]) (result);
 }