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/* Tests of fstat() function.
Copyright (C) 2011-2025 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 <sys/stat.h>
#include "signature.h"
SIGNATURE_CHECK (fstat, int, (int, struct stat *));
#include <errno.h>
#include <fcntl.h>
#include <unistd.h>
#include "macros.h"
int
main ()
{
/* Test behaviour for invalid file descriptors. */
{
struct stat statbuf;
errno = 0;
ASSERT (fstat (-1, &statbuf) == -1);
ASSERT (errno == EBADF);
}
{
struct stat statbuf;
close (99);
errno = 0;
ASSERT (fstat (99, &statbuf) == -1);
ASSERT (errno == EBADF);
}
/* /dev/null is a character device. */
{
int fd;
struct stat statbuf;
fd = open ("/dev/null", O_RDWR);
ASSERT (fstat (fd, &statbuf) == 0);
close (fd);
ASSERT (!S_ISREG (statbuf.st_mode));
ASSERT (S_ISCHR (statbuf.st_mode));
}
return test_exit_status;
}
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