time/test_time.c

   1 /* Copyright (C) 1991, 1992, 1994, 1997 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #include <stdio.h>
  20 #include <stdlib.h>
  21 #include <time.h>
  22
  23
  24 int
  25 main (int argc, char **argv)
  26 {
  27   time_t t;
  28   register struct tm *tp;
  29   struct tm tbuf;
  30   int lose = 0;
  31
  32   --argc;
  33   ++argv;
  34
  35   do
  36     {
  37       char buf[BUFSIZ];
  38       if (argc > 0)
  39         {
  40           static char buf[BUFSIZ];
  41           sprintf(buf, "TZ=%s", *argv);
  42           if (putenv(buf))
  43             {
  44               puts("putenv failed.");
  45               lose = 1;
  46             }
  47           else
  48             puts (buf);
  49         }
  50       tzset();
  51       tbuf.tm_year = 72;
  52       tbuf.tm_mon = 0;
  53       tbuf.tm_mday = 31;
  54       tbuf.tm_hour = 6;
  55       tbuf.tm_min = 14;
  56       tbuf.tm_sec = 50;
  57       tbuf.tm_isdst = -1;
  58     doit:;
  59       t = mktime(&tbuf);
  60       if (t == (time_t) -1)
  61         {
  62           puts("mktime() failed?");
  63           lose = 1;
  64         }
  65       tp = localtime(&t);
  66       if (tp == NULL)
  67         {
  68           puts("localtime() failed.");
  69           lose = 1;
  70         }
  71       else if (strftime(buf, sizeof(buf), "%a %b %d %X %Z %Y", tp) == 0)
  72         {
  73           puts("strftime() failed.");
  74           lose = 1;
  75         }
  76       else
  77         puts(buf);
  78       if (tbuf.tm_year == 101)
  79         {
  80           tbuf.tm_year = 97;
  81           tbuf.tm_mon = 0;
  82           goto doit;
  83         }
  84       ++argv;
  85     } while (--argc > 0);
  86
  87   {
  88 #define SIZE    256
  89     char buffer[SIZE];
  90     time_t curtime;
  91     struct tm *loctime;
  92
  93     curtime = time (NULL);
  94
  95     loctime = localtime (&curtime);
  96
  97     fputs (asctime (loctime), stdout);
  98
  99     strftime (buffer, SIZE, "Today is %A, %B %d.\n", loctime);
 100     fputs (buffer, stdout);
 101     strftime (buffer, SIZE, "The time is %I:%M %p.\n", loctime);
 102     fputs (buffer, stdout);
 103
 104     loctime->tm_year = 72;
 105     loctime->tm_mon = 8;
 106     loctime->tm_mday = 12;
 107     loctime->tm_hour = 20;
 108     loctime->tm_min = 49;
 109     loctime->tm_sec = 05;
 110     curtime = mktime (loctime);
 111     strftime (buffer, SIZE, "%D %T was %w the %jth.\n", loctime);
 112     fputs (buffer, stdout);
 113   }
 114
 115   return (lose ? EXIT_FAILURE : EXIT_SUCCESS);
 116 }