time/date.c

   1 /* Copyright (C) 1991 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
  16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 #include <ansidecl.h>
  20 #include <stddef.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <time.h>
  24
  25
  26 /* Prints the date in the form "Day Mon dd hh:mm:ss ZZZ yyyy\n".
  27    A simple test for localtime and strftime.  */
  28 int
  29 DEFUN(main, (argc, argv), int argc AND char **argv)
  30 {
  31   time_t t = time(NULL);
  32   register struct tm *tp = localtime(&t);
  33   register char good = tp != NULL;
  34
  35   if (good)
  36     {
  37       char buf[BUFSIZ];
  38       good = strftime(buf, sizeof(buf), "%a %b %d %X %Z %Y", tp);
  39       if (good)
  40         puts(buf);
  41       else
  42         perror("strftime");
  43     }
  44   else
  45     perror("localtime");
  46
  47   exit(good ? EXIT_SUCCESS : EXIT_FAILURE);
  48   return(good ? EXIT_SUCCESS : EXIT_FAILURE);
  49 }