1 /* Copyright (C) 2005-2022 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
__getgroups_chk(int size,__gid_t list[],size_t listlen)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 }
36