88 lines
2.3 KiB
C
88 lines
2.3 KiB
C
/* Test of fdatasync() function.
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Copyright (C) 2008-2025 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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#include <config.h>
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#include <unistd.h>
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#include "signature.h"
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SIGNATURE_CHECK (fdatasync, int, (int));
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#include <errno.h>
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#include <fcntl.h>
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#include "macros.h"
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int
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main (void)
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{
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int fd;
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const char *file = "test-fdatasync.txt";
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/* Assuming stdin and stdout are ttys, fdatasync is allowed to fail, but
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may succeed as an extension. */
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for (fd = 0; fd < 2; fd++)
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if (fdatasync (fd) != 0)
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{
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ASSERT (errno == EINVAL /* POSIX */
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|| errno == ENOTSUP /* seen on Mac OS X 10.5 */
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|| errno == EBADF /* seen on AIX 7.1 */
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|| errno == EIO /* seen on mingw */
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);
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}
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/* fdatasync must fail on invalid fd. */
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{
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errno = 0;
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ASSERT (fdatasync (-1) == -1);
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ASSERT (errno == EBADF);
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}
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{
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close (99);
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errno = 0;
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ASSERT (fdatasync (99) == -1);
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ASSERT (errno == EBADF);
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}
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#ifdef AT_FDCWD
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{
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errno = 0;
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ASSERT (fdatasync (AT_FDCWD) == -1);
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ASSERT (errno == EBADF);
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}
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#endif
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fd = open (file, O_WRONLY|O_CREAT|O_TRUNC, 0644);
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ASSERT (0 <= fd);
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ASSERT (write (fd, "hello", 5) == 5);
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ASSERT (fdatasync (fd) == 0);
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ASSERT (close (fd) == 0);
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#if 0
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/* POSIX is self-contradictory on whether fdatasync must fail on
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read-only file descriptors. Glibc allows it, as does our
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implementation if fsync allows it. */
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fd = open (file, O_RDONLY);
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ASSERT (0 <= fd);
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errno = 0;
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ASSERT (fdatasync (fd) == -1);
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ASSERT (errno == EBADF);
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ASSERT (close (fd) == 0);
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#endif
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ASSERT (unlink (file) == 0);
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return test_exit_status;
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}
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