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59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
/* Copyright (C) 1993, 1994, 1995 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 <ansidecl.h>
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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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/* Get the effective group ID of the calling process. */
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gid_t
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DEFUN_VOID(__getegid)
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{
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error_t err;
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gid_t egid;
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HURD_CRITICAL_BEGIN;
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__mutex_lock (&_hurd_id.lock);
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if (err = _hurd_check_ids ())
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{
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errno = err;
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egid = -1;
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}
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else if (_hurd_id.gen.ngids >= 1)
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egid = _hurd_id.gen.gids[0];
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else if (_hurd_id.aux.ngids >= 1)
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/* We have no effective gids. Return the real gid. */
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egid = _hurd_id.aux.gids[0];
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else
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{
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/* We do not even have a real gid. */
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errno = EGRATUITOUS;
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egid = -1;
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}
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__mutex_unlock (&_hurd_id.lock);
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HURD_CRITICAL_END;
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return egid;
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}
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weak_alias (__getegid, getegid)
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