Prepare for radical source tree reorganization. zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 122 insertions, 0 deletions

diff --git a/REORG.TODO/hurd/setauth.c b/REORG.TODO/hurd/setauth.c
new file mode 100644
index 0000000000..77bf7ee741
--- /dev/null
+++ b/REORG.TODO/hurd/setauth.c
@@ -0,0 +1,122 @@
+/* Copyright (C) 1991-2017 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 Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#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;
+  unsigned 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,
+				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,
+					     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,
+					     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)