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>
24 /* Set the group set for the current user to GROUPS (N of them). */
26 setgroups (size_t n
, const gid_t
*groups
)
33 /* Fault before taking locks. */
34 for (i
= 0; i
< n
; ++i
)
39 __mutex_lock (&_hurd_id
.lock
);
40 err
= _hurd_check_ids ();
43 /* Get a new auth port using those IDs. */
44 err
= __USEPORT (AUTH
,
45 __auth_makeauth (port
, NULL
, MACH_MSG_TYPE_COPY_SEND
, 0,
46 _hurd_id
.gen
.uids
, _hurd_id
.gen
.nuids
,
47 _hurd_id
.aux
.uids
, _hurd_id
.aux
.nuids
,
49 _hurd_id
.aux
.gids
, _hurd_id
.aux
.ngids
,
52 __mutex_unlock (&_hurd_id
.lock
);
55 /* Got a signal while inside an RPC of the critical section, retry again */
59 return __hurd_fail (err
);
61 /* Install the new auth port and reauthenticate everything. */
62 err
= __setauth (newauth
);
63 __mach_port_deallocate (__mach_task_self (), newauth
);
66 libc_hidden_def (setgroups
)