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att
GitHub Repository: att/ast
 Path: blob/master/src/lib/libast/features/botch.c
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/***********************************************************************

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*                                                                      *

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*               This software is part of the ast package               *

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*          Copyright (c) 1985-2011 AT&T Intellectual Property          *

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*                      and is licensed under the                       *

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*                 Eclipse Public License, Version 1.0                  *

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*                    by AT&T Intellectual Property                     *

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*                                                                      *

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*                A copy of the License is available at                 *

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*          http://www.eclipse.org/org/documents/epl-v10.html           *

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*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *

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*                                                                      *

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*              Information and Software Systems Research               *

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*                            AT&T Research                             *

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*                           Florham Park NJ                            *

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*                                                                      *

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*                 Glenn Fowler <[email protected]>                  *

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*                  David Korn <[email protected]>                   *

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*                   Phong Vo <[email protected]>                    *

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*                                                                      *

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***********************************************************************/

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#pragma prototyped

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/*

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 * Glenn Fowler

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 * AT&T Bell Laboratories

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 *

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 * generate ast traps for botched standard prototypes

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 */

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#include <sys/types.h>

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#include "FEATURE/lib"

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#include "FEATURE/sys"

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#if _lib_getgroups

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extern int		getgroups(int, gid_t*);

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#endif

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int

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main()

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{

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#if _lib_getgroups

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	if (sizeof(int) > sizeof(gid_t))

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	{

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		int	n;

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		int	i;

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		int	r;

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		gid_t	groups[32 * sizeof(int) / sizeof(gid_t)];

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		r = sizeof(int) / sizeof(gid_t);

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		if ((n = getgroups((sizeof(groups) / sizeof(groups[0])) / r, groups)) > 0)

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			for (i = 1; i <= n; i++)

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			{

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				groups[i] = ((gid_t)0);

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				if (getgroups(i, groups) != i)

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					goto botched;

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				if (groups[i] != ((gid_t)0))

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					goto botched;

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				groups[i] = ((gid_t)-1);

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				if (getgroups(i, groups) != i)

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					goto botched;

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				if (groups[i] != ((gid_t)-1))

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					goto botched;

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			}

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	}

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	return 0;

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 botched:

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	printf("#undef	getgroups\n");

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	printf("#define getgroups	_ast_getgroups /* implementation botches gid_t* arg */\n");

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#endif

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	return 0;

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}

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