Initial revision

1 files changed, 48 insertions, 0 deletions

diff --git a/libtrivfs/io-restrict-auth.c b/libtrivfs/io-restrict-auth.c
new file mode 100644
index 00000000..7aa9dd55
--- /dev/null
+++ b/libtrivfs/io-restrict-auth.c
@@ -0,0 +1,48 @@
+/*
+   Copyright (C) 1993, 1994 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"
+
+error_t
+trivfs_S_io_restrict_auth (struct protid *cred,
+			   mach_port_t *newport,
+			   mach_msg_type_name_t *newporttype,
+			   uid_t *uids, u_int nuids,
+			   uid_t *gids, u_int ngids)
+{
+  struct protid *newcred;
+  
+  if (!cred)
+    return EOPNOTSUPP;
+  
+  newcred = ports_allocate_port (sizeof (struct protid), PT_PROTID);
+  spin_lock (&trivfs_refcnt_lock);
+  newcred->po = cred->po;
+  newcred->po->refcnt++;
+  spin_unlock (&trivfs_refcnt_lock);
+  
+  io_restrict_auth (cred->realnode, &newcred->realnode, 
+		    uids, nuids, gids, ngids);
+  
+  *newport = ports_get_right (newcred);
+  *newporttype = MACH_MSG_TYPE_MAKE_SEND;
+  return 0;
+}