time/date.c

   1 /* Copyright (C) 1991, 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 <stddef.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <time.h>
  23
  24
  25 /* Prints the date in the form "Day Mon dd hh:mm:ss ZZZ yyyy\n".
  26    A simple test for localtime and strftime.  */
  27 int
  28 main (argc, argv)
  29      int argc;
  30      char **argv;
  31 {
  32   time_t t = time (NULL);
  33   struct tm *tp = localtime (&t);
  34   char good = tp != NULL;
  35
  36   if (good)
  37     {
  38       char buf[BUFSIZ];
  39       good = strftime (buf, sizeof (buf), "%a %b %d %X %Z %Y", tp);
  40       if (good)
  41         puts (buf);
  42       else
  43         perror ("strftime");
  44     }
  45   else
  46     perror ("localtime");
  47
  48   return good ? EXIT_SUCCESS : EXIT_FAILURE;
  49 }