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/* Test for localtime bug in year 2039 (bug 22639).
Copyright (C) 2017-2025 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <time.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <support/check.h>
static int
do_test (void)
{
TEST_VERIFY_EXIT (setenv ("TZ", "PST8PDT,M3.2.0,M11.1.0", 1) == 0);
tzset ();
if (sizeof (time_t) > 4)
{
time_t ouch = (time_t) 2187810000LL;
char buf[500];
struct tm *tm = localtime (&ouch);
TEST_VERIFY_EXIT (tm != NULL);
TEST_VERIFY_EXIT (strftime (buf, sizeof buf, "%Y-%m-%d %H:%M:%S %Z", tm)
> 0);
puts (buf);
TEST_VERIFY (strcmp (buf, "2039-04-30 14:00:00 PDT") == 0);
/* Same as before but for localtime_r. */
struct tm tmd;
tm = localtime_r (&ouch, &tmd);
TEST_VERIFY_EXIT (tm == &tmd);
TEST_VERIFY_EXIT (strftime (buf, sizeof buf, "%Y-%m-%d %H:%M:%S %Z", tm)
> 0);
puts (buf);
TEST_VERIFY (strcmp (buf, "2039-04-30 14:00:00 PDT") == 0);
}
else
FAIL_UNSUPPORTED ("32-bit time_t");
return 0;
}
#include <support/test-driver.c>
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