1 files changed, 96 insertions, 0 deletions
diff --git a/libtreefs/rights.c b/libtreefs/rights.c
new file mode 100644
index 00000000..f803b029
--- /dev/null
+++ b/libtreefs/rights.c
@@ -0,0 +1,96 @@
+/* Functions for making send rights in various ways
+
+   Copyright (C) 1995 Free Software Foundation, Inc.
+
+   Written by Miles Bader <miles@gnu.ai.mit.edu>
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or
+   modify it under the terms of the GNU General Public License as
+   published by the Free Software Foundation; either version 2, or (at
+   your option) any later version.
+
+   The GNU Hurd 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
+   General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+
+/* Return in PORT a send right for a new protid, pointing at the peropen PO,
+   with rights initialized from AUTH.  */
+error_t
+treefs_peropen_create_right (struct treefs_peropen *po,
+			     struct treefs_auth *auth,
+			     mach_port_t *port)
+{
+  struct treefs_node *node = po->node;
+  struct treefs_fsys *fsys = node->fsys;
+  struct treefs_handle *handle =
+    ports_allocate_port (fsys->port_bucket,
+			 sizeof (struct treefs_handle),
+			 fsys->handle_port_class);
+
+  if (handle == NULL)
+    return MACH_PORT_NULL;
+
+  handle->po = po;
+  po->refs++;
+  handle->auth = auth;
+  auth->refs++;
+
+  err = treefs_node_init_handle (node, handle);
+  if (err)
+    {
+      po->refs--;
+      auth->refs--;
+    }
+
+  *port = ports_get_right (handle);
+
+  return 0;
+}
+
+/* Return in PORT a send right for a new handle and a new peropen, pointing
+   at NODE, with rights initialized from AUTH.  FLAGS and PARENT_PORT are used
+   to initialize the corresponding fields in the new peropen.  */
+error_t
+treefs_node_create_right (struct treefs_node *node, int flags,
+			  mach_port_t parent_port, struct treefs_auth *auth,
+			  mach_port_t *port)
+{
+  struct treefs_peropen *po = malloc (sizeof (struct treefs_peropen));
+
+  if (po == NULL)
+    return ENOMEM;
+
+  /* Initialize the peropen structure.  */
+  po->refs = 0;
+  po->node = node;
+  po->open_flags = flags;
+  po->user_lock_state = LOCK_UN;
+  po->parent_port = parent_port;
+  if (parent_port != MACH_PORT_NULL)
+    mach_port_mod_refs (mach_task_self (),
+			parent_port, MACH_PORT_RIGHT_SEND, 1);
+
+  treefs_node_ref (node);
+
+  err = treefs_node_init_peropen (node, po, flags, auth);
+  if (err)
+    goto puke;
+
+  err = treefs_peropen_create_right (po, auth, port);
+  if (err)
+    goto puke;
+
+  return 0;
+
+ puke:
+  treefs_node_unref (node);
+  free (po);
+  return err;
+}