1 /* Copyright (C) 1993, 1994, 1995, 1997 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
4 The GNU C Library is free software; you can redistribute it and/or
5 modify it under the terms of the GNU Lesser General Public
6 License as published by the Free Software Foundation; either
7 version 2.1 of the License, or (at your option) any later version.
9 The GNU C Library is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public
15 License along with the GNU C Library; if not, write to the Free
16 Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
20 #include <sys/types.h>
27 __setreuid (ruid
, euid
)
35 __mutex_lock (&_hurd_id
.lock
);
36 err
= _hurd_check_ids ();
40 /* Make a new auth handle which has RUID as the real uid,
41 and EUID as the first element in the list of effective uids. */
43 uid_t
*newgen
, *newaux
;
46 newgen
= _hurd_id
.gen
.uids
;
47 ngen
= _hurd_id
.gen
.nuids
;
50 if (_hurd_id
.gen
.nuids
== 0)
52 /* No effective uids now. The new set will be just UID. */
58 _hurd_id
.gen
.uids
[0] = euid
;
63 newaux
= _hurd_id
.aux
.uids
;
64 naux
= _hurd_id
.aux
.nuids
;
67 if (_hurd_id
.aux
.nuids
== 0)
74 _hurd_id
.aux
.uids
[0] = ruid
;
79 err
= __USEPORT (AUTH
, __auth_makeauth
80 (port
, NULL
, MACH_MSG_TYPE_COPY_SEND
, 0,
81 newgen
, ngen
, newaux
, naux
,
82 _hurd_id
.gen
.gids
, _hurd_id
.gen
.ngids
,
83 _hurd_id
.aux
.gids
, _hurd_id
.aux
.ngids
,
86 __mutex_unlock (&_hurd_id
.lock
);
90 return __hurd_fail (err
);
92 /* Install the new handle and reauthenticate everything. */
93 err
= __setauth (newauth
);
94 __mach_port_deallocate (__mach_task_self (), newauth
);
98 weak_alias (__setreuid
, setreuid
)