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botch.c

/***********************************************************************
*                                                                      *
*               This software is part of the ast package               *
*          Copyright (c) 1985-2010 AT&T Intellectual Property          *
*                      and is licensed under the                       *
*                  Common Public License, Version 1.0                  *
*                    by AT&T Intellectual Property                     *
*                                                                      *
*                A copy of the License is available at                 *
*            http://www.opensource.org/licenses/cpl1.0.txt             *
*         (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9)         *
*                                                                      *
*              Information and Software Systems Research               *
*                            AT&T Research                             *
*                           Florham Park NJ                            *
*                                                                      *
*                 Glenn Fowler <gsf@research.att.com>                  *
*                  David Korn <dgk@research.att.com>                   *
*                   Phong Vo <kpv@research.att.com>                    *
*                                                                      *
***********************************************************************/
#pragma prototyped
/*
 * Glenn Fowler
 * AT&T Bell Laboratories
 *
 * generate ast traps for botched standard prototypes
 */

#include <sys/types.h>

#include "FEATURE/lib"
#include "FEATURE/sys"

#if _lib_getgroups
extern int        getgroups(int, gid_t*);
#endif

int
main()
{
#if _lib_getgroups
      if (sizeof(int) > sizeof(gid_t))
      {
            int   n;
            int   i;
            int   r;
            gid_t groups[32 * sizeof(int) / sizeof(gid_t)];

            r = sizeof(int) / sizeof(gid_t);
            if ((n = getgroups((sizeof(groups) / sizeof(groups[0])) / r, groups)) > 0)
                  for (i = 1; i <= n; i++)
                  {
                        groups[i] = ((gid_t)0);
                        if (getgroups(i, groups) != i)
                              goto botched;
                        if (groups[i] != ((gid_t)0))
                              goto botched;
                        groups[i] = ((gid_t)-1);
                        if (getgroups(i, groups) != i)
                              goto botched;
                        if (groups[i] != ((gid_t)-1))
                              goto botched;
                  }
      }
      return 0;
 botched:
      printf("#undef    getgroups\n");
      printf("#define getgroups     _ast_getgroups /* implementation botches gid_t* arg */\n");
#endif
      return 0;
}

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