1/* Test that tzset sets tzname correctly (BZ #19253).
2 Copyright (C) 2015-2022 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 <stdlib.h>
21#include <string.h>
22#include <time.h>
23
24static int
25do_test (void)
26{
27 int result = 0;
28
29 setenv (name: "TZ", value: TZDEFRULES, replace: 1);
30 tzset ();
31 const char *stdtz = strdup (s: tzname[0]);
32 setenv (name: "TZ", value: "STD-1DST", replace: 1);
33 tzset ();
34 if (strcmp (tzname[0], "STD") != 0)
35 {
36 printf (format: "FAIL: TZ=STD-1DST, tzname[0] = %s\n", tzname[0]);
37 result = 1;
38 }
39 setenv (name: "TZ", value: TZDEFRULES, replace: 1);
40 tzset ();
41 if (strcmp (tzname[0], stdtz) != 0)
42 {
43 printf (format: "FAIL: TZ=%s, tzname[0] = %s\n", TZDEFRULES, tzname[0]);
44 result = 1;
45 }
46 return result;
47}
48
49#define TEST_FUNCTION do_test ()
50#include "../test-skeleton.c"
51

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