1 files changed, 61 insertions, 0 deletions
diff --git a/libdiskfs/io-reauthenticate.c b/libdiskfs/io-reauthenticate.c
new file mode 100644
index 00000000..3fc780d2
--- /dev/null
+++ b/libdiskfs/io-reauthenticate.c
@@ -0,0 +1,61 @@
+/*
+   Copyright (C) 1994, 1995, 1996 Free Software Foundation
+
+   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 "priv.h"
+#include "io_S.h"
+
+/* Implement io_reathenticate as described in <hurd/io.defs>. */
+kern_return_t
+diskfs_S_io_reauthenticate (struct protid *cred,
+			    mach_port_t rend_port)
+{
+  struct protid *newcred;
+  error_t err;
+  mach_port_t newright;
+
+  if (cred == 0)
+    return EOPNOTSUPP;
+
+  /* This routine must carefully ignore EINTR because we 
+     are a simpleroutine, so callers won't know to restart. */
+
+  mutex_lock (&cred->po->np->lock);
+  do
+    err = diskfs_start_protid (cred->po, &newcred);
+  while (err == EINTR);
+  if (err)
+    {
+      mutex_unlock (&cred->po->np->lock);
+      return err;
+    }
+
+  newright = ports_get_right (newcred);
+  err = mach_port_insert_right (mach_task_self (), newright, newright,
+				MACH_MSG_TYPE_MAKE_SEND);
+  assert_perror (err);
+
+  diskfs_finish_protid (newcred, iohelp_reauth (diskfs_auth_server_port, 
+						rend_port, newright, 1));
+  mach_port_deallocate (mach_task_self (), rend_port);
+  mach_port_deallocate (mach_task_self (), newright);
+    
+  mutex_unlock (&cred->po->np->lock);
+
+  ports_port_deref (newcred);
+
+  return 0;
+}