1 /* Test for freopen implementation.
2 Copyright (C) 2000-2021 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, see
17 <https://www.gnu.org/licenses/>. */
18
19 #include <mcheck.h>
20 #include <stdio.h>
21 #include <stdlib.h>
22 #include <wchar.h>
23
24
25 int
main(int argc,char * argv[])26 main (int argc, char *argv[])
27 {
28 FILE *fp;
29
30 mtrace ();
31
32 if (argc < 2)
33 exit (1);
34
35 fp = fopen (argv[1], "w");
36 if (fp == NULL)
37 {
38 puts ("fopen failed: %m");
39 exit (1);
40 }
41
42 fputs ("Hello world (mb)\n", fp);
43
44 fp = freopen (argv[1], "a+", fp);
45 if (fp == NULL)
46 {
47 puts ("freopen failed: %m");
48 exit (1);
49 }
50
51 fputws (L"Hello world (wc)\n", fp);
52
53 fclose (fp);
54
55 return 0;
56 }
57