timezone/tst-timezone.c

   1 /* Copyright (C) 1998 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Andreas Jaeger <aj@arthur.rhein-neckar.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 Library General Public License as
   7    published by the Free Software Foundation; either version 2 of the
   8    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    Library General Public License for more details.
  14
  15    You should have received a copy of the GNU Library General Public
  16    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  17    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  18    Boston, MA 02111-1307, USA.  */
  19
  20 #include <time.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <unistd.h>
  24
  25 int failed = 0;
  26
  27 struct test_times
  28 {
  29   const char *name;
  30   int daylight;
  31   int timezone;
  32 };
  33
  34 static const struct test_times tests[] =
  35 {
  36   { "Europe/Berlin", 1, -3600 },
  37   { "Universal", 0, 0 },
  38   { "Australia/Melbourne", 1, -36000 },
  39   { "America/Sao_Paulo", 1, 10800 },
  40   { NULL, 0, 0 }
  41 };
  42
  43
  44 void
  45 print_tzvars (void)
  46 {
  47   printf ("tzname[0]: %s\n", tzname[0]);
  48   printf ("tzname[1]: %s\n", tzname[1]);
  49   printf ("daylight: %d\n", daylight);
  50   printf ("timezone: %ld\n", timezone);
  51 }
  52
  53
  54 void
  55 check_tzvars (const char *name, int dayl, int timez)
  56 {
  57   if (daylight != dayl)
  58     {
  59       printf ("Timezone: %s, daylight is: %d but should be: %d\n",
  60               name, daylight, dayl);
  61       ++failed;
  62     }
  63   if (timezone != timez)
  64     {
  65       printf ("Timezone: %s, timezone is: %ld but should be: %d\n",
  66               name, timezone, timez);
  67       ++failed;
  68     }
  69 }
  70
  71
  72 int
  73 main (int argc, char ** argv)
  74 {
  75   time_t t;
  76   const struct test_times *pt;
  77   char buf[BUFSIZ];
  78
  79   /* This should be: Thu May 14 18:02:16 1998.  */
  80   t = 895194136;
  81   printf ("We use this date: %s\n", ctime (&t));
  82
  83   for (pt = tests; pt->name != NULL; ++pt)
  84     {
  85       /* Start with a known state */
  86       printf ("Checking timezone %s\n", pt->name);
  87       sprintf (buf, "TZ=%s", pt->name);
  88       if (putenv (buf))
  89         {
  90           puts ("putenv failed.");
  91           failed = 1;
  92         }
  93       tzset ();
  94       print_tzvars ();
  95       check_tzvars (pt->name, pt->daylight, pt->timezone);
  96
  97       /* calling localtime shouldn't make a difference */
  98       localtime (&t);
  99       print_tzvars ();
 100       check_tzvars (pt->name, pt->daylight, pt->timezone);
 101     }
 102
 103   return failed ? EXIT_FAILURE : EXIT_SUCCESS;
 104 }