Initial revision

1 files changed, 71 insertions, 0 deletions

diff --git a/libtrivfs/io-reauthenticate.c b/libtrivfs/io-reauthenticate.c
new file mode 100644
index 00000000..82ab77bc
--- /dev/null
+++ b/libtrivfs/io-reauthenticate.c
@@ -0,0 +1,71 @@
+/*
+   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.  */
+
+error_t
+trivfs_S_io_reauthenticate (struct protid *cred,
+			    int rendint)
+{
+  struct protid *newcred;
+  uid_t *gen_uids = alloca (sizeof (uid_t) * 20);
+  uid_t *gen_gids = alloca (sizeof (uid_t) * 20);
+  uid_t *aux_uids = alloca (sizeof (uid_t) * 20);
+  uid_t *aux_gids = alloca (sizeof (uid_t) * 20);
+  u_int genuidlen, gengidlen, auxuidlen, auxgidlen;
+  uid_t *gubuf, *ggbuf, *aubuf, *agbuf;
+  error_t err;
+
+  if (cred == 0)
+    return EOPNOTSUPP;
+
+  genuidlen = gengidlen = auxuidlen = auxgidlen = 20;
+  gubuf = gen_uids; ggbuf = gen_gids;
+  aubuf = aux_uids; agbuf = aux_gids;
+
+  mutex_lock (&cred->po->np->lock);
+  newcred = diskfs_start_protid (cred->po);
+  err = auth_server_authenticate (diskfs_auth_server_port, 
+				  ports_get_right (cred),
+				  MACH_MSG_TYPE_MAKE_SEND,
+				  rend_int,
+				  ports_get_right (newcred),
+				  MACH_MSG_TYPE_MAKE_SEND,
+				  &gen_uids, &genuidlen, 
+				  &aux_uids, &auxuidlen,
+				  &gen_gids, &gengidlen,
+				  &aux_gids, &auxgidlen);
+  assert (!err);		/* XXX */
+
+  diskfs_finish_protid (newcred, gen_uids, genuidlen, gen_gids, gengidlen);
+
+  if (gubuf != gen_uids)
+    vm_deallocate (mach_task_self (), (u_int) gen_uids,
+		   genuidlen * sizeof (uid_t));
+  if (ggbuf != gen_gids)
+    vm_deallocate (mach_task_self (), (u_int) gen_gids,
+		   gengidlen * sizeof (uid_t));
+  if (aubuf != aux_uids)
+    vm_deallocate (mach_task_self (), (u_int) aux_uids,
+		   auxuidlen * sizeof (uid_t));
+  if (agbuf != aux_gids)
+    vm_deallocate (mach_task_self (), (u_int) aux_gids,
+		   auxgidlen * sizeof (uid_t));
+  
+  return 0;