test_tm_zone.c revision ab8beedeb70c6941e0ff68014d8db64cee4ef15d 
1/*
2 * Copyright (C) 2008 The Android Open Source Project
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 *  * Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 *  * Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in
12 *    the documentation and/or other materials provided with the
13 *    distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28/* a small program to test the tm_zone setting in Bionic */
29#include <time.h>
30#include <stdio.h>
31#include <stdlib.h>
32
33int  main( void )
34{
35#ifndef TM_ZONE
36    fprintf(stderr, "TM_ZONE is not defined in <time.h> !!\n" );
37    return 1;
38#else
39    const char*  tz = getenv("TZ");
40    time_t       now = time(NULL);
41    struct tm    tm0;
42    struct tm*   tm;
43
44    if (tz) {
45        printf( "TZ set to '%s'\n", tz );
46    } else
47        printf( "TZ is not defined\n" );
48
49    tm = localtime_r( &now, &tm0 );
50    printf( "localtime_r() returns timezone abbreviation '%s'\n", tm->TM_ZONE ? tm->TM_ZONE : "<NULL POINTER>" );
51    printf( "tzname[0] is '%s'\n", tzname[0] ? tzname[0] : "<NULL POINTER>" );
52    printf( "tzname[1] is '%s'\n", tzname[1] ? tzname[1] : "<NULL POINTER>" );
53#endif
54    return 0;
55}
56