1/* Smoke test for ioctl.
2 Copyright (C) 2021-2022 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#include <support/check.h>
20#include <support/xunistd.h>
21#include <sys/ioctl.h>
22#include <sys/socket.h>
23
24static int
25do_test (void)
26{
27 int pair[2];
28 TEST_COMPARE (socketpair (AF_UNIX, SOCK_STREAM, 0, pair), 0);
29 TEST_COMPARE (write (pair[0], "buffer", sizeof ("buffer")),
30 sizeof ("buffer"));
31 int value;
32 TEST_COMPARE (ioctl (pair[1], FIONREAD, &value), 0);
33 TEST_COMPARE (value, sizeof ("buffer"));
34 TEST_COMPARE (ioctl (pair[0], FIONREAD, &value), 0);
35 TEST_COMPARE (value, 0);
36 xclose (pair[0]);
37 xclose (pair[1]);
38 return 0;
39}
40
41#include <support/test-driver.c>
42

source code of glibc/misc/tst-ioctl.c