Initial revision

1 files changed, 53 insertions, 0 deletions

diff --git a/libtrivfs/fsys-getroot.c b/libtrivfs/fsys-getroot.c
new file mode 100644
index 00000000..7820aec9
--- /dev/null
+++ b/libtrivfs/fsys-getroot.c
@@ -0,0 +1,53 @@
+/*
+   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_fsys_getroot (mach_port_t fsys,
+		       int flags,
+		       uid_t *uids, u_int nuids,
+		       uid_t *gids, u_int ngids,
+		       mach_port_t *newpt,
+		       mach_msg_type_name_t *newpttype)
+{
+  struct protid *cred;
+  int i;
+
+  assert (!trivfs_support_read && !trivfs_support_write
+	  && !trivfs_support_exec);
+  
+  if (flags & (O_READ|O_WRITE|O_EXEC))
+    return EACCES;
+  
+  cred = ports_allocate_port (sizeof (struct protid), PT_PROTID);
+  cred->isroot = 0;
+  for (i = 0; i < nuids; i++)
+    if (uids[i] == 0)
+      cred->isroot = 1;
+  io_restrict_auth (trivfs_underlying_node, &cred->realnod, 
+		    uids, nuids, gids, ngids);
+  *newpt = ports_get_right (cred);
+  *newpttype = MACH_MSG_TYPE_MAKE_SEND;
+  return 0;
+}
+
+