1 files changed, 91 insertions, 0 deletions
diff --git a/hurd/hurdid.c b/hurd/hurdid.c
new file mode 100644
index 0000000000..6f1c977cc8
--- /dev/null
+++ b/hurd/hurdid.c
@@ -0,0 +1,91 @@
+/* Copyright (C) 1993, 1994, 1995 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
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#include <hurd.h>
+#include <hurd/id.h>
+
+struct hurd_id_data _hurd_id;
+
+
+/* Check that _hurd_id.{gen,aux} are valid and update them if not.
+   Expects _hurd_id.lock to be held and does not release it.  */
+
+error_t
+_hurd_check_ids (void)
+{
+  if (! _hurd_id.valid)
+    {
+      inline void dealloc (__typeof (_hurd_id.gen) *p)
+	{
+	  if (p->uids)
+	    {
+	      __vm_deallocate (__mach_task_self (),
+			       (vm_address_t) p->uids,
+			       p->nuids * sizeof (uid_t));
+	      p->uids = NULL;
+	    }
+	  p->nuids = 0;
+	  if (p->gids)
+	    {
+	      __vm_deallocate (__mach_task_self (),
+			       (vm_address_t) p->gids,
+			       p->ngids * sizeof (gid_t));
+	      p->gids = NULL;
+	    }
+	  p->ngids = 0;
+	}
+
+      error_t err;
+
+      dealloc (&_hurd_id.gen);
+      dealloc (&_hurd_id.aux);
+
+      if (_hurd_id.rid_auth != MACH_PORT_NULL)
+	{
+	  __mach_port_deallocate (__mach_task_self (), _hurd_id.rid_auth);
+	  _hurd_id.rid_auth = MACH_PORT_NULL;
+	}
+
+      if (err = __USEPORT (AUTH, __auth_getids
+			   (port,
+			    &_hurd_id.gen.uids, &_hurd_id.gen.nuids,
+			    &_hurd_id.aux.uids, &_hurd_id.aux.nuids,
+			    &_hurd_id.gen.gids, &_hurd_id.gen.ngids,
+			    &_hurd_id.aux.gids, &_hurd_id.aux.ngids)))
+	return err;
+
+      _hurd_id.valid = 1;
+    }
+
+  return 0;
+}
+
+static void
+init_id (void)
+{
+  __mutex_init (&_hurd_id.lock);
+  _hurd_id.valid = 0;
+  _hurd_id.rid_auth = MACH_PORT_NULL;
+  _hurd_id.gen.uids = _hurd_id.aux.uids = NULL;
+  _hurd_id.gen.nuids = _hurd_id.aux.nuids = 0;
+  _hurd_id.gen.gids = _hurd_id.aux.gids = NULL;
+  _hurd_id.gen.ngids = _hurd_id.aux.ngids = 0;
+
+  (void) &init_id;		/* Avoid "defined but not used" warning.  */
+}
+text_set_element (_hurd_preinit_hook, init_id);