libio/test-freopen.c

   1 /* Test for freopen implementation.
   2    Copyright (C) 2000 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <mcheck.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <wchar.h>
  24
  25
  26 int
  27 main (int argc, char *argv[])
  28 {
  29   FILE *fp;
  30
  31   mtrace ();
  32
  33   if (argc < 2)
  34     exit (1);
  35
  36   fp = fopen (argv[1], "w");
  37   if (fp == NULL)
  38     {
  39       puts ("fopen failed: %m");
  40       exit (1);
  41     }
  42
  43   fputs ("Hello world (mb)\n", fp);
  44
  45   fp = freopen (argv[1], "a+", fp);
  46   if (fp == NULL)
  47     {
  48       puts ("freopen failed: %m");
  49       exit (1);
  50     }
  51
  52   fputws (L"Hello world (wc)\n", fp);
  53
  54   fclose (fp);
  55
  56   return 0;
  57 }