time/test-tz.c

   1 #include <stdlib.h>
   2 #include <time.h>
   3 #include <string.h>
   4 #include <stdio.h>
   5
   6 struct {
   7   const char *  env;
   8   time_t        expected;
   9 } tests[] = {
  10   {"TZ=MST",            832935315},
  11   {"TZ=",               832910115},
  12   {"TZ=:UTC",           832910115},
  13   {"TZ=UTC",            832910115},
  14   /* PROBLEM ahead.  I fear the tzset code is somehow broken.  */
  15   /*  {"TZ=UTC0",               832910115}*/
  16 };
  17
  18
  19 int
  20 main(int argc, char ** argv)
  21 {
  22   int errors = 0;
  23   struct tm tm;
  24   time_t t;
  25   unsigned int i;
  26
  27   memset (&tm, 0, sizeof (tm));
  28   tm.tm_isdst = 0;
  29   tm.tm_year  = 96;     /* years since 1900 */
  30   tm.tm_mon   = 4;
  31   tm.tm_mday  = 24;
  32   tm.tm_hour  =  3;
  33   tm.tm_min   = 55;
  34   tm.tm_sec   = 15;
  35
  36   for (i = 0; i < sizeof (tests) / sizeof (tests[0]); ++i)
  37     {
  38       putenv (tests[i].env);
  39       tzset ();
  40       t = mktime(&tm);
  41       if (t != tests[i].expected)
  42         {
  43           printf ("%s: flunked test %u (expected %lu, got %lu)\n",
  44                   argv[0], i, (long) tests[i].expected, (long) t);
  45           ++errors;
  46         }
  47     }
  48   if (errors == 0)
  49     {
  50       puts ("No errors.");
  51       exit (EXIT_SUCCESS);
  52     }
  53   else
  54     {
  55       printf ("%d errors.\n", errors);
  56       exit (EXIT_FAILURE);
  57     }
  58 }