timezone/tst-timezone.c

   1 /* Copyright (C) 1998, 1999, 2000, 2005, 2007 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Andreas Jaeger <aj@suse.de>, 1998.
   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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <time.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <unistd.h>
  25
  26 int failed = 0;
  27
  28 struct test_times
  29 {
  30   const char *name;
  31   int daylight;
  32   int timezone;
  33   const char *tzname[2];
  34 };
  35
  36 static const struct test_times tests[] =
  37 {
  38   { "Europe/Amsterdam", 1, -3600, { "CET", "CEST" }},
  39   { "Europe/Berlin", 1, -3600, { "CET", "CEST" }},
  40   { "Europe/London", 1, 0, { "GMT", "BST" }},
  41   { "Universal", 0, 0, {"UTC", "UTC" }},
  42   { "Australia/Melbourne", 1, -36000, { "EST", "EST" }},
  43   { "America/Sao_Paulo", 1, 10800, {"BRT", "BRST" }},
  44   { "America/Chicago", 1, 21600, {"CST", "CDT" }},
  45   { "America/Indiana/Indianapolis", 1, 18000, {"EST", "EDT" }},
  46   { "America/Los_Angeles", 1, 28800, {"PST", "PDT" }},
  47   { "Pacific/Auckland", 1, -43200, { "NZST", "NZDT" }},
  48   { NULL, 0, 0 }
  49 };
  50
  51 /* This string will be used for `putenv' calls.  */
  52 char envstring[100];
  53
  54 static void
  55 print_tzvars (void)
  56 {
  57   printf ("tzname[0]: %s\n", tzname[0]);
  58   printf ("tzname[1]: %s\n", tzname[1]);
  59   printf ("daylight: %d\n", daylight);
  60   printf ("timezone: %ld\n", timezone);
  61 }
  62
  63
  64 static void
  65 check_tzvars (const char *name, int dayl, int timez, const char *const tznam[])
  66 {
  67   int i;
  68
  69   if (daylight != dayl)
  70     {
  71       printf ("*** Timezone: %s, daylight is: %d but should be: %d\n",
  72               name, daylight, dayl);
  73       ++failed;
  74     }
  75   if (timezone != timez)
  76     {
  77       printf ("*** Timezone: %s, timezone is: %ld but should be: %d\n",
  78               name, timezone, timez);
  79       ++failed;
  80     }
  81   for (i = 0; i <= 1; ++i)
  82     if (strcmp (tzname[i], tznam[i]) != 0)
  83       {
  84         printf ("*** Timezone: %s, tzname[%d] is: %s but should be: %s\n",
  85                 name, i, tzname[i], tznam[i]);
  86         ++failed;
  87       }
  88 }
  89
  90
  91 int
  92 main (int argc, char ** argv)
  93 {
  94   time_t t;
  95   const struct test_times *pt;
  96   char buf[BUFSIZ];
  97
  98   /* This should be: Fri May 15 01:02:16 1998 (UTC).  */
  99   t = 895194136;
 100   printf ("We use this date: %s\n", asctime (gmtime (&t)));
 101
 102   for (pt = tests; pt->name != NULL; ++pt)
 103     {
 104       /* Start with a known state */
 105       printf ("Checking timezone %s\n", pt->name);
 106       sprintf (buf, "TZ=%s", pt->name);
 107       if (putenv (buf))
 108         {
 109           puts ("putenv failed.");
 110           failed = 1;
 111         }
 112       tzset ();
 113       print_tzvars ();
 114       check_tzvars (pt->name, pt->daylight, pt->timezone, pt->tzname);
 115
 116       /* calling localtime shouldn't make a difference */
 117       localtime (&t);
 118       print_tzvars ();
 119       check_tzvars (pt->name, pt->daylight, pt->timezone, pt->tzname);
 120     }
 121
 122   /* From a post of Scott Harrington <seh4@ix.netcom.com> to the timezone
 123      mailing list.  */
 124   {
 125     struct tm tmBuf = {0, 0, 0, 10, 3, 98, 0, 0, -1};
 126     char buf[200];
 127     strcpy (envstring, "TZ=Europe/London");
 128     putenv (envstring);
 129     t = mktime (&tmBuf);
 130     snprintf (buf, sizeof (buf), "TZ=%s %ld %d %d %d %d %d %d %d %d %d",
 131               getenv ("TZ"), t,
 132               tmBuf.tm_sec, tmBuf.tm_min, tmBuf.tm_hour,
 133               tmBuf.tm_mday, tmBuf.tm_mon, tmBuf.tm_year,
 134               tmBuf.tm_wday, tmBuf.tm_yday, tmBuf.tm_isdst);
 135     fputs (buf, stdout);
 136     puts (" should be");
 137     puts ("TZ=Europe/London 892162800 0 0 0 10 3 98 5 99 1");
 138     if (strcmp (buf, "TZ=Europe/London 892162800 0 0 0 10 3 98 5 99 1") != 0)
 139       {
 140         failed = 1;
 141         fputs (" FAILED ***", stdout);
 142       }
 143   }
 144
 145   printf("\n");
 146
 147   {
 148     struct tm tmBuf = {0, 0, 0, 10, 3, 98, 0, 0, -1};
 149     char buf[200];
 150     strcpy (envstring, "TZ=GMT");
 151     /* No putenv call needed!  */
 152     t = mktime (&tmBuf);
 153     snprintf (buf, sizeof (buf), "TZ=%s %ld %d %d %d %d %d %d %d %d %d",
 154               getenv ("TZ"), t,
 155               tmBuf.tm_sec, tmBuf.tm_min, tmBuf.tm_hour,
 156               tmBuf.tm_mday, tmBuf.tm_mon, tmBuf.tm_year,
 157               tmBuf.tm_wday, tmBuf.tm_yday, tmBuf.tm_isdst);
 158     fputs (buf, stdout);
 159     puts (" should be");
 160     puts ("TZ=GMT 892166400 0 0 0 10 3 98 5 99 0");
 161     if (strcmp (buf, "TZ=GMT 892166400 0 0 0 10 3 98 5 99 0") != 0)
 162       {
 163         failed = 1;
 164         fputs (" FAILED ***", stdout);
 165       }
 166   }
 167
 168   return failed ? EXIT_FAILURE : EXIT_SUCCESS;
 169 }