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63 lines
1.8 KiB
C
63 lines
1.8 KiB
C
/* getresgid -- fetch effective group ID, real group ID, and saved-set group ID
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Copyright (C) 2002 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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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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 effective group ID, real group ID, and saved-set group ID,
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of the calling process. */
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int
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__getresgid (gid_t *egid, gid_t *rgid, gid_t *sgid)
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{
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error_t err;
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gid_t eff, real, 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.ngids < 1)
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/* We do not even have a real GID. */
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err = EGRATUITOUS;
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else
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{
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real = _hurd_id.aux.gids[0];
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saved = _hurd_id.aux.ngids < 2 ? real :_hurd_id.aux.gids[1];
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eff = _hurd_id.gen.ngids < 1 ? real : _hurd_id.gen.gids[0];
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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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*egid = eff;
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*rgid = real;
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*sgid = saved;
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return 0;
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}
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libc_hidden_def (__getresgid)
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weak_alias (__getresgid, getresgid)
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