1  /* Copyright (C) 2005-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <errno.h>
      19  #include <unistd.h>
      20  
      21  
      22  int
      23  __getgroups_chk (int size, __gid_t list[], size_t listlen)
      24  {
      25    if (__glibc_unlikely (size < 0))
      26      {
      27        __set_errno (EINVAL);
      28        return -1;
      29      }
      30  
      31    if (__glibc_unlikely (size * sizeof (__gid_t) > listlen))
      32      __chk_fail ();
      33  
      34    return __getgroups (size, list);
      35  }