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/*
* Copyright (C) 2005, 2007, 2009-2024 Free Software Foundation, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Jim Meyering and Bruno Haible. */
#include <config.h>
#include <sys/time.h>
#include "signature.h"
SIGNATURE_CHECK (gettimeofday, int,
(struct timeval *, GETTIMEOFDAY_TIMEZONE *));
#include <time.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "macros.h"
static void
test_clobber ()
{
time_t t = 0;
struct tm *lt;
struct tm saved_lt;
struct timeval tv;
lt = localtime (&t);
saved_lt = *lt;
gettimeofday (&tv, NULL);
if (memcmp (lt, &saved_lt, sizeof (struct tm)) != 0)
{
fprintf (stderr, "gettimeofday still clobbers the localtime buffer!\n");
exit (1);
}
}
static void
test_consistency ()
{
struct timeval tv1;
time_t tt2;
struct timeval tv3;
time_t tt4;
ASSERT (gettimeofday (&tv1, NULL) == 0);
tt2 = time (NULL);
ASSERT (gettimeofday (&tv3, NULL) == 0);
tt4 = time (NULL);
/* Verify monotonicity of gettimeofday(). */
ASSERT (tv1.tv_sec < tv3.tv_sec
|| (tv1.tv_sec == tv3.tv_sec && tv1.tv_usec <= tv3.tv_usec));
/* Verify monotonicity of time(). */
ASSERT (tt2 <= tt4);
/* Verify that the tv_sec field of the result is the same as time(NULL). */
/* Note: It's here that the dependency to the 'time' module is needed.
Without it, this assertion would sometimes fail on glibc systems, see
https://sourceware.org/bugzilla/show_bug.cgi?id=30200 */
ASSERT (tv1.tv_sec <= tt2);
ASSERT (tt2 <= tv3.tv_sec);
ASSERT (tv3.tv_sec <= tt4);
}
int
main (void)
{
test_clobber ();
test_consistency ();
return 0;
}
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