1 /* Test opening a stream with a file descriptor.
2 Copyright (C) 2011-2020 Free Software Foundation, Inc.
3
4 This program is free software: you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
8
9 This program 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
12 GNU General Public License for more details.
13
14 You should have received a copy of the GNU General Public License
15 along with this program. If not, see <https://www.gnu.org/licenses/>. */
16
17 #include <config.h>
18
19 #include <stdio.h>
20
21 #include "signature.h"
22 SIGNATURE_CHECK (fdopen, FILE *, (int, const char *));
23
24 #include <errno.h>
25 #include <unistd.h>
26
27 #include "macros.h"
28
29 int
main(void)30 main (void)
31 {
32 /* Test behavior on failure. POSIX makes it hard to check for
33 failure, since the behavior is not well-defined on invalid file
34 descriptors, so try fdopen 1000 times and if that's not enough to
35 fail due to EMFILE, so be it. */
36
37 int i;
38 for (i = 0; i < 1000; i++)
39 {
40 errno = 0;
41 if (! fdopen (STDOUT_FILENO, "w"))
42 {
43 ASSERT (errno != 0);
44 break;
45 }
46 }
47
48 return 0;
49 }
50