1 /* Test for localtime bug in year 2039 (bug 22639).
2 Copyright (C) 2017-2022 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 <stdio.h>
22 #include <string.h>
23 #include <support/check.h>
24
25 static int
do_test(void)26 do_test (void)
27 {
28 TEST_VERIFY_EXIT (setenv ("TZ", "PST8PDT,M3.2.0,M11.1.0", 1) == 0);
29 tzset ();
30 if (sizeof (time_t) > 4)
31 {
32 time_t ouch = (time_t) 2187810000LL;
33 char buf[500];
34 struct tm *tm = localtime (&ouch);
35 TEST_VERIFY_EXIT (tm != NULL);
36 TEST_VERIFY_EXIT (strftime (buf, sizeof buf, "%Y-%m-%d %H:%M:%S %Z", tm)
37 > 0);
38 puts (buf);
39 TEST_VERIFY (strcmp (buf, "2039-04-30 14:00:00 PDT") == 0);
40
41 /* Same as before but for localtime_r. */
42 struct tm tmd;
43 tm = localtime_r (&ouch, &tmd);
44 TEST_VERIFY_EXIT (tm == &tmd);
45
46 TEST_VERIFY_EXIT (strftime (buf, sizeof buf, "%Y-%m-%d %H:%M:%S %Z", tm)
47 > 0);
48 puts (buf);
49 TEST_VERIFY (strcmp (buf, "2039-04-30 14:00:00 PDT") == 0);
50 }
51 else
52 FAIL_UNSUPPORTED ("32-bit time_t");
53 return 0;
54 }
55
56 #include <support/test-driver.c>
57