1 files changed, 97 insertions, 0 deletions
diff --git a/libtrivfs/io-reauthenticate.c b/libtrivfs/io-reauthenticate.c
new file mode 100644
index 00000000..3754ff72
--- /dev/null
+++ b/libtrivfs/io-reauthenticate.c
@@ -0,0 +1,97 @@
+/*
+   Copyright (C) 1993, 1994, 1995, 1996 Free Software Foundation
+
+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 the GNU Hurd; see the file COPYING.  If not, write to
+the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+/* Written by Michael I. Bushnell.  */
+
+#include "priv.h"
+#include "io_S.h"
+#include <assert.h>
+#include <string.h>
+
+kern_return_t
+trivfs_S_io_reauthenticate (struct trivfs_protid *cred,
+			    mach_port_t reply,
+			    mach_msg_type_name_t replytype,
+			    mach_port_t rendport)
+{
+  struct trivfs_protid *newcred;
+  error_t err;
+  auth_t auth;
+  mach_port_t newright;
+
+  if (cred == 0)
+    return EOPNOTSUPP;
+
+  do
+    err = ports_create_port_noinstall (cred->po->cntl->protid_class,
+				       cred->po->cntl->protid_bucket,
+				       sizeof (struct trivfs_protid), 
+				       &newcred);
+  while (err == EINTR);
+  if (err)
+    return err;
+
+  auth = getauth ();
+  newright = ports_get_right (newcred);
+  err = mach_port_insert_right (mach_task_self (), newright, newright,
+				MACH_MSG_TYPE_MAKE_SEND);
+  assert_perror (err);
+
+  newcred->user = iohelp_reauth (auth, rendport, newright, 1);
+  if (idvec_contains (newcred->user->uids, 0))
+    newcred->isroot = 1;
+
+  mach_port_deallocate (mach_task_self (), rendport);
+  mach_port_deallocate (mach_task_self (), newright);
+  mach_port_deallocate (mach_task_self (), auth);
+
+  newcred->hook = cred->hook;
+  
+  mutex_lock (&cred->po->cntl->lock);
+  newcred->po = cred->po;
+  newcred->po->refcnt++;
+  mutex_unlock (&cred->po->cntl->lock);
+  
+  do
+    err = io_restrict_auth (newcred->po->cntl->underlying, &newcred->realnode,
+			    newcred->user->uids->ids, 
+			    newcred->user->uids->num,
+			    newcred->user->gids->ids,
+			    newcred->user->gids->num);
+  while (err == EINTR);
+  if (!err && trivfs_protid_create_hook)
+    {
+      do
+	err = (*trivfs_protid_create_hook) (newcred);
+      while (err == EINTR);
+      if (err)
+	mach_port_deallocate (mach_task_self (), newcred->realnode);
+    }
+
+  if (err)
+    /* Signal that the user destroy hook shouldn't be called on NEWCRED.  */
+    newcred->realnode = MACH_PORT_NULL;
+
+  mach_port_move_member (mach_task_self (), newcred->pi.port_right,
+			 cred->po->cntl->protid_bucket->portset);
+
+  ports_port_deref (newcred);
+
+  return err;
+}