/* Test of fsync() function.
- Copyright (C) 2008-2011 Free Software Foundation, Inc.
+ Copyright (C) 2008-2013 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
int fd;
const char *file = "test-fsync.txt";
- if (fsync (0) != 0)
- ASSERT (errno == EINVAL);
+ /* Assuming stdin and stdout are ttys, fsync is allowed to fail, but
+ may succeed as an extension. */
+ for (fd = 0; fd < 2; fd++)
+ if (fsync (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 */
+ );
+ }
+
+ /* fsync must fail on invalid fd. */
+ {
+ errno = 0;
+ ASSERT (fsync (-1) == -1);
+ ASSERT (errno == EBADF);
+ }
+ {
+ close (99);
+ errno = 0;
+ ASSERT (fsync (99) == -1);
+ ASSERT (errno == EBADF);
+ }
+
fd = open (file, O_WRONLY|O_CREAT|O_TRUNC, 0644);
ASSERT (0 <= fd);
ASSERT (write (fd, "hello", 5) == 5);
ASSERT (fsync (fd) == 0);
ASSERT (close (fd) == 0);
+
+ /* For a read-only regular file input file descriptor, fsync should
+ succeed (since at least atime changes can be synchronized). */
+ fd = open (file, O_RDONLY);
+ ASSERT (0 <= fd);
+ {
+ char buf[1];
+ ASSERT (read (fd, buf, sizeof buf) == sizeof buf);
+ }
+ ASSERT (fsync (fd) == 0);
+ ASSERT (close (fd) == 0);
+
ASSERT (unlink (file) == 0);
return 0;