1 files changed, 65 insertions, 0 deletions
diff --git a/libtreefs/trans-start.c b/libtreefs/trans-start.c
new file mode 100644
index 00000000..1b0156bf
--- /dev/null
+++ b/libtreefs/trans-start.c
@@ -0,0 +1,65 @@
+/* Starting a passive translator
+
+   Copyright (C) 1994, 1995 Free Software Foundation, Inc.
+
+   This program 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.
+
+   This program 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. */
+
+#include "treefs.h"
+
+#include <fcntl.h>
+
+int fshelp_transboot_port_type = PT_TRANSBOOT;
+
+/* Start the translator TRANS (of length TRANS_LEN) on NODE, which should be
+   locked, and will be unlocked when this function returns.  PARENT_PORT is
+   a send right to use as the parent port passed to the translator.  */
+error_t
+_treefs_node_start_translator (struct treefs_node *node,
+			       char *trans, unsigned trans_len,
+			       file_t parent_port)
+{
+  error_t err;
+  int mode = O_READ | O_EXEC;
+  struct treefs_auth *auth;
+  file_t node_port;
+  uid_t uid, gid;
+
+  err = treefs_node_get_trans_auth (node, &auth);
+  if (err)
+    return err;
+
+  if (!node->fsys->readonly && treefs_node_type (node) == S_IFREG)
+    mode |= O_WRITE;
+
+  /* Create the REALNODE port for the new filesystem. */
+  node_port = treefs_node_make_right (node, mode, parent_port, auth);
+  mach_port_insert_right (mach_task_self (), node_port, node_port,
+			  MACH_MSG_TYPE_MAKE_SEND);
+
+
+  mutex_unlock (&node->lock);
+  
+  /* XXXX Change libfshelp so that it take more than 1 uid/gid? */
+  uid = auth->nuids > 0 ? auth->uids[0] : -1;
+  gid = auth->ngids > 0 ? auth->gids[0] : -1;
+
+  err =
+    fshelp_start_translator (&node->active_trans, trans, trans_len,
+			     parent_port, node_port, uid, gid);
+
+  treefs_node_auth_unref (node, auth);
+
+  return err;
+}