1/* Check IOV_MAX definition for consistency (bug 22321).
2 Copyright (C) 2017-2022 Free Software Foundation, Inc.
3 This file is part of the GNU C Library.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19/* Defined in tst-sysconf-iov_max-uapi.c. */
20long uio_maxiov_value (void);
21
22
23#include <limits.h>
24#include <support/check.h>
25#include <sys/uio.h>
26#include <unistd.h>
27
28static int
29do_test (void)
30{
31 TEST_VERIFY (_XOPEN_IOV_MAX == 16); /* Value required by POSIX. */
32 TEST_VERIFY (uio_maxiov_value () >= _XOPEN_IOV_MAX);
33 TEST_VERIFY (IOV_MAX == uio_maxiov_value ());
34 TEST_VERIFY (UIO_MAXIOV == uio_maxiov_value ());
35 TEST_VERIFY (sysconf (_SC_UIO_MAXIOV) == uio_maxiov_value ());
36 TEST_VERIFY (sysconf (_SC_IOV_MAX) == uio_maxiov_value ());
37 return 0;
38}
39
40#include <support/test-driver.c>
41

source code of glibc/sysdeps/unix/sysv/linux/tst-sysconf-iov_max.c