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glibc  2.9
test-freopen.c
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00001 /* Test for freopen implementation.
00002    Copyright (C) 2000 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 #include <mcheck.h>
00021 #include <stdio.h>
00022 #include <stdlib.h>
00023 #include <wchar.h>
00024 
00025 
00026 int
00027 main (int argc, char *argv[])
00028 {
00029   FILE *fp;
00030 
00031   mtrace ();
00032 
00033   if (argc < 2)
00034     exit (1);
00035 
00036   fp = fopen (argv[1], "w");
00037   if (fp == NULL)
00038     {
00039       puts ("fopen failed: %m");
00040       exit (1);
00041     }
00042 
00043   fputs ("Hello world (mb)\n", fp);
00044 
00045   fp = freopen (argv[1], "a+", fp);
00046   if (fp == NULL)
00047     {
00048       puts ("freopen failed: %m");
00049       exit (1);
00050     }
00051 
00052   fputws (L"Hello world (wc)\n", fp);
00053 
00054   fclose (fp);
00055 
00056   return 0;
00057 }