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62 lines
1.7 KiB
C
62 lines
1.7 KiB
C
/* getresuid -- fetch real user ID, effective user ID, and saved-set user ID
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Copyright (C) 2002-2014 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 Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the 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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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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#include <errno.h>
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#include <unistd.h>
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#include <hurd.h>
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#include <hurd/id.h>
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/* Fetch the real user ID, effective user ID, and saved-set user ID,
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of the calling process. */
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int
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__getresuid (uid_t *ruid, uid_t *euid, uid_t *suid)
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{
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error_t err;
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uid_t real, eff, saved;
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HURD_CRITICAL_BEGIN;
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__mutex_lock (&_hurd_id.lock);
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err = _hurd_check_ids ();
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if (!err)
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{
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if (_hurd_id.aux.nuids < 1)
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/* We do not even have a real UID. */
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err = EGRATUITOUS;
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else
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{
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real = _hurd_id.aux.uids[0];
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eff = _hurd_id.gen.nuids < 1 ? real : _hurd_id.gen.uids[0];
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saved = _hurd_id.aux.nuids < 2 ? real : _hurd_id.aux.uids[1];
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}
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}
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__mutex_unlock (&_hurd_id.lock);
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HURD_CRITICAL_END;
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if (err)
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return __hurd_fail (err);
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*ruid = real;
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*euid = eff;
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*suid = saved;
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return 0;
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}
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libc_hidden_def (__getresuid)
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weak_alias (__getresuid, getresuid)
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