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-rw-r--r--hurd/setauth.c124
1 files changed, 124 insertions, 0 deletions
diff --git a/hurd/setauth.c b/hurd/setauth.c
new file mode 100644
index 0000000000..7378e4f070
--- /dev/null
+++ b/hurd/setauth.c
@@ -0,0 +1,124 @@
+/* Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public License as
+published by the Free Software Foundation; either version 2 of the
+License, or (at your option) any later version.
+
+The GNU C Library 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with the GNU C Library; see the file COPYING.LIB. If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA. */
+
+#include <hurd.h>
+#include <hurd/port.h>
+#include <hurd/id.h>
+#include "set-hooks.h"
+
+/* Things in the library which want to be run when the auth port changes. */
+DEFINE_HOOK (_hurd_reauth_hook, (auth_t new_auth));
+
+#include <cthreads.h>
+static struct mutex reauth_lock = MUTEX_INITIALIZER;
+
+
+/* Set the auth port to NEW, and reauthenticate
+ everything used by the library. */
+error_t
+_hurd_setauth (auth_t new)
+{
+ error_t err;
+ int d;
+ mach_port_t newport, ref;
+
+ /* Give the new send right a user reference.
+ This is a good way to check that it is valid. */
+ if (err = __mach_port_mod_refs (__mach_task_self (), new,
+ MACH_PORT_RIGHT_SEND, 1))
+ return err;
+
+ HURD_CRITICAL_BEGIN;
+
+ /* We lock against another thread doing setauth. Anyone who sets
+ _hurd_ports[INIT_PORT_AUTH] some other way is asking to lose. */
+ __mutex_lock (&reauth_lock);
+
+ /* Install the new port in the cell. */
+ __mutex_lock (&_hurd_id.lock);
+ _hurd_port_set (&_hurd_ports[INIT_PORT_AUTH], new);
+ _hurd_id.valid = 0;
+ if (_hurd_id.rid_auth)
+ {
+ __mach_port_deallocate (__mach_task_self (), _hurd_id.rid_auth);
+ _hurd_id.rid_auth = MACH_PORT_NULL;
+ }
+ __mutex_unlock (&_hurd_id.lock);
+
+ if (_hurd_init_dtable != NULL)
+ /* We just have the simple table we got at startup.
+ Otherwise, a reauth_hook in dtable.c takes care of this. */
+ for (d = 0; d < _hurd_init_dtablesize; ++d)
+ if (_hurd_init_dtable[d] != MACH_PORT_NULL)
+ {
+ mach_port_t new;
+ ref = __mach_reply_port ();
+ if (! __io_reauthenticate (_hurd_init_dtable[d],
+ ref, MACH_MSG_TYPE_MAKE_SEND) &&
+ ! HURD_PORT_USE (&_hurd_ports[INIT_PORT_AUTH],
+ __auth_user_authenticate
+ (port,
+ _hurd_init_dtable[d],
+ ref, MACH_MSG_TYPE_MAKE_SEND,
+ &new)))
+ {
+ __mach_port_deallocate (__mach_task_self (),
+ _hurd_init_dtable[d]);
+ _hurd_init_dtable[d] = new;
+ }
+ __mach_port_destroy (__mach_task_self (), ref);
+ }
+
+ ref = __mach_reply_port ();
+ if (__USEPORT (CRDIR,
+ ! __io_reauthenticate (port,
+ ref, MACH_MSG_TYPE_MAKE_SEND) &&
+ ! __auth_user_authenticate (new, port,
+ ref, MACH_MSG_TYPE_MAKE_SEND,
+ &newport)))
+ _hurd_port_set (&_hurd_ports[INIT_PORT_CRDIR], newport);
+ __mach_port_destroy (__mach_task_self (), ref);
+
+ ref = __mach_reply_port ();
+ if (__USEPORT (CWDIR,
+ ! __io_reauthenticate (port,
+ ref, MACH_MSG_TYPE_MAKE_SEND) &&
+ ! __auth_user_authenticate (new, port,
+ ref, MACH_MSG_TYPE_MAKE_SEND,
+ &newport)))
+ _hurd_port_set (&_hurd_ports[INIT_PORT_CWDIR], newport);
+ __mach_port_destroy (__mach_task_self (), ref);
+
+ /* Run things which want to do reauthorization stuff. */
+ RUN_HOOK (_hurd_reauth_hook, (new));
+
+ __mutex_unlock (&reauth_lock);
+
+ HURD_CRITICAL_END;
+
+ return 0;
+}
+
+int
+__setauth (auth_t new)
+{
+ error_t err = _hurd_setauth (new);
+ return err ? __hurd_fail (err) : 0;
+}
+
+weak_alias (__setauth, setauth)