1/* Test FD* macros.
2 Copyright (C) 1997-2022 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 <stdio.h>
20#include <sys/types.h>
21
22static int
23do_test (void)
24{
25 int retval = 0;
26 int i;
27 fd_set set;
28
29 FD_ZERO (&set);
30 for (i=0; i < FD_SETSIZE; ++i)
31 {
32 printf (format: "%d => check:", i);
33 if (FD_ISSET (i, &set) == 0)
34 fputs ("ok", stdout);
35 else
36 {
37 fputs ("nok", stdout);
38 retval = 1;
39 }
40 fputs (", set", stdout);
41 FD_SET (i, &set);
42 fputs (", check:", stdout);
43 if (FD_ISSET (i, &set))
44 fputs ("ok", stdout);
45 else
46 {
47 fputs ("nok", stdout);
48 retval = 1;
49 }
50 fputs (", clear", stdout);
51 FD_CLR (i, &set);
52 fputs (", check:", stdout);
53 if (FD_ISSET (i, &set) == 0)
54 puts (s: "ok");
55 else
56 {
57 puts (s: "nok");
58 retval = 1;
59 }
60 }
61
62 return retval;
63}
64
65#define TEST_FUNCTION do_test ()
66#include "../test-skeleton.c"
67

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