1 files changed, 71 insertions, 0 deletions
diff --git a/libdiskfs/io-reauthenticate.c b/libdiskfs/io-reauthenticate.c
new file mode 100644
index 00000000..aa14c0f9
--- /dev/null
+++ b/libdiskfs/io-reauthenticate.c
@@ -0,0 +1,71 @@
+/* 
+   Copyright (C) 1994 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"
+
+/* Implement io_reathenticate as described in <hurd/io.defs>. */
+error_t
+S_io_reauthenticate (struct protid *cred, 
+		     int rend_int)
+{
+  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 = start_making_protid (cred->po);
+  err = auth_server_authenticate (auth_server_port, 
+				  cred->fspt.pi.port,
+				  MACH_MSG_TYPE_MAKE_SEND,
+				  rend_int,
+				  newcred->fspt.pi.port,
+				  MACH_MSG_TYPE_MAKE_SEND,
+				  &gen_uids, &genuidlen, 
+				  &aux_uids, &auxuidlen,
+				  &gen_gids, &gengidlen,
+				  &aux_gids, &auxgidlen);
+  assert (!err);		/* XXX */
+
+  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;
+}