#include <stdlib.h>

#include <time.h>

#include <string.h>

#include <stdio.h>

struct {

  const char *	env;

  time_t	expected;

} tests[] = {

  {"MST",	832935315},

  {"",		832910115},

  {":UTC",	832910115},

  {"UTC",	832910115},

  {"UTC0",	832910115}

};

int

main (int argc, char ** argv)

{

  int errors = 0;

  struct tm tm;

  time_t t;

  unsigned int i;

  memset (&tm, 0, sizeof (tm));

  tm.tm_isdst = 0;

  tm.tm_year  = 96;	/* years since 1900 */

  tm.tm_mon   = 4;

  tm.tm_mday  = 24;

  tm.tm_hour  =  3;

  tm.tm_min   = 55;

  tm.tm_sec   = 15;

  for (i = 0; i < sizeof (tests) / sizeof (tests[0]); ++i)

    {

      setenv ("TZ", tests[i].env, 1);

      t = mktime (&tm;;

      if (t != tests[i].expected)

	{

	  printf ("%s: flunked test %u (expected %lu, got %lu)\n",

		  argv[0], i, (long) tests[i].expected, (long) t);

	  ++errors;

	}

    }

  if (errors == 0)

    {

      puts ("No errors.");

      return EXIT_SUCCESS;

    }

  else

    {

      printf ("%d errors.\n", errors);

      return EXIT_FAILURE;

    }

}