54 lines
1.6 KiB
C
54 lines
1.6 KiB
C
/* Copyright (C) 1991, 1992 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <hurd.h>
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/* Return the effective uid set. */
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int
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getuids (int n, uid_t *uidset)
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{
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int nuids;
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__mutex_lock (&_hurd_idlock);
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if (!_hurd_id_valid)
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{
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error_t err = _HURD_PORT_USE (&_hurd_auth,
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__auth_getids (port, &_hurd_id));
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if (err)
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{
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__mutex_unlock (&_hurd_idlock);
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return __hurd_fail (err);
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}
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_hurd_id_valid = 1;
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}
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nuids = _hurd_id.nuids;
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if (uidset != NULL)
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{
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/* Copy into a temporary array before releasing the lock. */
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uid_t uids[nuids];
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memcpy (uids, _hurd_id.uids, sizeof (uids));
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__mutex_unlock (&_hurd_idlock);
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/* Lock is released; now copy into user array, which might fault. */
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memcpy (uidset, uids, sizeof (uids));
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}
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else
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__mutex_unlock (&_hurd_idlock);
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return nuids;
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}
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