maint.mk: Update system header list for #include syntax checks.
[gnulib.git] / tests / test-fdopen.c
blob5e5a7d2749017e2b06d24babb42a86efb0e12f2a
1 /* Test opening a stream with a file descriptor.
2 Copyright (C) 2011-2024 Free Software Foundation, Inc.
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.
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.
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/>. */
17 #include <config.h>
19 #include <stdio.h>
21 #include "signature.h"
22 SIGNATURE_CHECK (fdopen, FILE *, (int, const char *));
24 #include <errno.h>
25 #include <unistd.h>
27 #include "macros.h"
29 int
30 main (void)
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 #if defined __ANDROID__ /* fdsan */
37 #define COUNT 1
38 #else
39 #define COUNT 1000
40 #endif
42 int i;
43 for (i = 0; i < COUNT; i++)
45 errno = 0;
46 if (! fdopen (STDOUT_FILENO, "w"))
48 ASSERT (errno != 0);
49 break;
53 return test_exit_status;