1 files changed, 91 insertions, 0 deletions
diff --git a/libdiskfs/trans-callback.c b/libdiskfs/trans-callback.c
new file mode 100644
index 00000000..283b184f
--- /dev/null
+++ b/libdiskfs/trans-callback.c
@@ -0,0 +1,91 @@
+/*
+   Copyright (C) 1995,96,97,98,2001,02 Free Software Foundation, Inc.
+   Written by Michael I. Bushnell.
+
+   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. */
+
+#include "priv.h"
+#include <fcntl.h>
+
+/* Callback function needed for calls to fshelp_fetch_root.  See
+   <hurd/fshelp.h> for the interface description.  */
+static error_t
+_diskfs_translator_callback1_fn (void *cookie1, void *cookie2,
+				 uid_t *uid, gid_t *gid,
+				 char **argz, size_t *argz_len)
+{
+  error_t err;
+  struct node *np = cookie1;
+
+  if (! (np->dn_stat.st_mode & S_IPTRANS))
+    return ENOENT;
+
+  err = diskfs_get_translator (np, argz, (u_int *) argz_len);
+  if (err)
+    {
+      assert (err != EOPNOTSUPP);
+      return err;
+    }
+
+  *uid = np->dn_stat.st_uid;
+  *gid = np->dn_stat.st_gid;
+
+  return 0;
+}
+
+/* Callback function needed for calls to fshelp_fetch_root.  See
+   <hurd/fshelp.h> for the interface description.  */
+static error_t
+_diskfs_translator_callback2_fn (void *cookie1, void *cookie2,
+				 int flags,
+				 mach_port_t *underlying,
+				 mach_msg_type_name_t *underlying_type)
+{
+  struct node *np = cookie1;
+  struct protid *cred;
+  struct peropen *po;
+  error_t err;
+  struct iouser *user;
+
+  err = iohelp_create_simple_iouser (&user, np->dn_stat.st_uid,
+				     np->dn_stat.st_gid);
+  if (err)
+    return err;
+
+  err = diskfs_make_peropen (np, flags, cookie2, &po);
+  if (! err)
+    {
+      err = diskfs_create_protid (po, user, &cred);
+      if (err)
+	diskfs_release_peropen (po);
+    }
+
+  iohelp_free_iouser (user);
+
+  if (! err)
+    {
+      *underlying = ports_get_right (cred);
+      *underlying_type = MACH_MSG_TYPE_MAKE_SEND;
+      ports_port_deref (cred);
+    }
+  return err;
+}
+
+fshelp_fetch_root_callback1_t _diskfs_translator_callback1 =
+  _diskfs_translator_callback1_fn;
+fshelp_fetch_root_callback2_t _diskfs_translator_callback2 =
+  _diskfs_translator_callback2_fn;