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- /* Copyright (C) 1991, 1992 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 <ansidecl.h>
- #include <errno.h>
- #include <sys/types.h>
- #include <grp.h>
- #include <hurd.h>
-
- /* Set the group set for the current user to GROUPS (N of them). */
- int
- DEFUN(setgroups, (n, groups), size_t n AND CONST gid_t *groups)
- {
- error_t err;
- auth_t newauth;
- gid_t gids[sizeof (_hurd_id.groups) / sizeof (gid_t)];
-
- if (n > sizeof (gids) / sizeof (gids[0]) || groups == NULL)
- {
- errno = EINVAL;
- return -1;
- }
-
- memcpy (gids, groups, n * sizeof (gid_t));
- groups = gids;
-
- __mutex_lock (&_hurd_idlock);
- if (!_hurd_id_valid)
- {
- error_t err = _HURD_PORT_USE (&_hurd_auth,
- __auth_getids (port, &_hurd_id));
- if (err)
- {
- __mutex_unlock (&_hurd_idlock);
- return __hurd_fail (err);
- }
- _hurd_id_valid = 1;
- }
-
- _hurd_id.ngroups = n;
- memcpy (_hurd_id.groups, groups, n * sizeof (gid_t));
- _hurd_id_valid = 0;
-
- err = _HURD_PORT_USE (&_hurd_auth,
- __auth_makeauth (port, &_hurd_id, &newauth));
- _hurd_id_valid = 0;
- __mutex_unlock (&_hurd_idlock);
-
- if (err)
- return __hurd_fail (err);
-
- err = __setauth (newauth);
- __mach_port_deallocate (__mach_task_self (), newauth);
- return err;
- }
-