kc3-lang/gnulib/tests/test-fdatasync.c

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• Hash : 7b089321
  Author :
  Date : 2025-01-01T09:24:36
  

  maint: run 'make update-copyright'
  

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• tests/test-fdatasync.c

• /* Test of fdatasync() function.
     Copyright (C) 2008-2025 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 <unistd.h>
  
  #include "signature.h"
  SIGNATURE_CHECK (fdatasync, int, (int));
  
  #include <errno.h>
  #include <fcntl.h>
  
  #include "macros.h"
  
  int
  main (void)
  {
    int fd;
    const char *file = "test-fdatasync.txt";
  
    /* Assuming stdin and stdout are ttys, fdatasync is allowed to fail, but
       may succeed as an extension.  */
    for (fd = 0; fd < 2; fd++)
      if (fdatasync (fd) != 0)
        {
          ASSERT (errno == EINVAL /* POSIX */
                  || errno == ENOTSUP /* seen on Mac OS X 10.5 */
                  || errno == EBADF /* seen on AIX 7.1 */
                  || errno == EIO /* seen on mingw */
                  );
        }
  
    /* fdatasync must fail on invalid fd.  */
    {
      errno = 0;
      ASSERT (fdatasync (-1) == -1);
      ASSERT (errno == EBADF);
    }
    {
      close (99);
      errno = 0;
      ASSERT (fdatasync (99) == -1);
      ASSERT (errno == EBADF);
    }
  #ifdef AT_FDCWD
    {
      errno = 0;
      ASSERT (fdatasync (AT_FDCWD) == -1);
      ASSERT (errno == EBADF);
    }
  #endif
  
    fd = open (file, O_WRONLY|O_CREAT|O_TRUNC, 0644);
    ASSERT (0 <= fd);
    ASSERT (write (fd, "hello", 5) == 5);
    ASSERT (fdatasync (fd) == 0);
    ASSERT (close (fd) == 0);
  
  #if 0
    /* POSIX is self-contradictory on whether fdatasync must fail on
       read-only file descriptors.  Glibc allows it, as does our
       implementation if fsync allows it.  */
    fd = open (file, O_RDONLY);
    ASSERT (0 <= fd);
    errno = 0;
    ASSERT (fdatasync (fd) == -1);
    ASSERT (errno == EBADF);
    ASSERT (close (fd) == 0);
  #endif
  
    ASSERT (unlink (file) == 0);
  
    return test_exit_status;
  }
  

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