1/* Test for settimeofday
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 <time.h>
20#include <stdlib.h>
21#include <sys/time.h>
22#include <support/check.h>
23#include <support/xtime.h>
24
25#define TIMESPEC_SEC_Y2038_OV 0x7FFFFFFF
26#define FUTURE_TIME (TIMESPEC_SEC_Y2038_OV - 10)
27
28static int
29do_test (void)
30{
31 const struct timeval tv = { FUTURE_TIME, 0};
32 struct timespec tv_future, tv_now;
33
34 /* Check if altering target time is allowed. */
35 if (getenv (SETTIME_ENV_NAME) == NULL)
36 FAIL_UNSUPPORTED ("settimeofday is executed only when "\
37 SETTIME_ENV_NAME" is set\n");
38
39 tv_now = xclock_now (CLOCK_REALTIME);
40 int ret = settimeofday (tv: &tv, NULL);
41 if (ret == -1)
42 FAIL_EXIT1 ("settimeofday failed: %m\n");
43
44 tv_future = xclock_now (CLOCK_REALTIME);
45
46 /* Restore old time value on target machine. */
47 xclock_settime (CLOCK_REALTIME, ts: (const struct timespec*) &tv_now);
48
49 if (tv_future.tv_sec < tv.tv_sec)
50 FAIL_EXIT1 ("settimeofday set wrong time!\n");
51
52 return 0;
53}
54
55#include <support/test-driver.c>
56

source code of glibc/time/tst-settimeofday.c