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git.ipfire.org Git - thirdparty/glibc.git/blob - sysdeps/mach/hurd/setreuid.c
1 /* Copyright (C) 1993-2023 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, see
16 <https://www.gnu.org/licenses/>. */
19 #include <sys/types.h>
26 __setreuid (uid_t ruid
, uid_t euid
)
33 __mutex_lock (&_hurd_id
.lock
);
34 err
= _hurd_check_ids ();
38 /* Make a new auth handle which has RUID as the real uid,
39 and EUID as the first element in the list of effective uids. */
41 uid_t
*newgen
, *newaux
;
44 newgen
= _hurd_id
.gen
.uids
;
45 ngen
= _hurd_id
.gen
.nuids
;
48 if (_hurd_id
.gen
.nuids
== 0)
50 /* No effective uids now. The new set will be just UID. */
56 _hurd_id
.gen
.uids
[0] = euid
;
61 newaux
= _hurd_id
.aux
.uids
;
62 naux
= _hurd_id
.aux
.nuids
;
65 if (_hurd_id
.aux
.nuids
== 0)
72 _hurd_id
.aux
.uids
[0] = ruid
;
77 err
= __USEPORT (AUTH
, __auth_makeauth
78 (port
, NULL
, MACH_MSG_TYPE_COPY_SEND
, 0,
79 newgen
, ngen
, newaux
, naux
,
80 _hurd_id
.gen
.gids
, _hurd_id
.gen
.ngids
,
81 _hurd_id
.aux
.gids
, _hurd_id
.aux
.ngids
,
84 __mutex_unlock (&_hurd_id
.lock
);
87 /* Got a signal while inside an RPC of the critical section, retry again */
91 return __hurd_fail (err
);
93 /* Install the new handle and reauthenticate everything. */
94 err
= __setauth (newauth
);
95 __mach_port_deallocate (__mach_task_self (), newauth
);
99 weak_alias (__setreuid
, setreuid
)