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/* Test opening a stream with a file descriptor.
Copyright (C) 2011-2022 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
#include <stdio.h>
#include "signature.h"
SIGNATURE_CHECK (fdopen, FILE *, (int, const char *));
#include <errno.h>
#include <unistd.h>
#include "macros.h"
int
main (void)
{
/* Test behavior on failure. POSIX makes it hard to check for
failure, since the behavior is not well-defined on invalid file
descriptors, so try fdopen 1000 times and if that's not enough to
fail due to EMFILE, so be it. */
int i;
for (i = 0; i < 1000; i++)
{
errno = 0;
if (! fdopen (STDOUT_FILENO, "w"))
{
ASSERT (errno != 0);
break;
}
}
return 0;
}
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