O_EMPTY_PATH
if ((fmode & O_EMPTY_PATH) != 0)
(fmode & (O_CREAT | O_EMPTY_PATH)) == (O_CREAT | O_EMPTY_PATH))
dfd = openat(pathdfd, "", O_DIRECTORY | O_EMPTY_PATH);
dfd = openat(pathdfd, "", O_DIRECTORY | O_EMPTY_PATH);
dfd = openat(pathdfd, "", O_DIRECTORY | O_EMPTY_PATH);
fd = openat(pathfd, "", O_RDWR | O_EMPTY_PATH);
fd = openat(pathfd, "", O_RDWR | O_EMPTY_PATH | O_APPEND);
fd = openat(pathfd, "", O_RDWR | O_EMPTY_PATH);
fd = openat(pathfd, "", O_RDONLY | O_EMPTY_PATH);
ATF_REQUIRE_ERRNO(EOPNOTSUPP, openat(pathfd, "", O_EMPTY_PATH) == -1);
wotty = openat(STDIN_FILENO, "", O_EMPTY_PATH | O_WRONLY);
rotty = openat(STDIN_FILENO, "", O_EMPTY_PATH | O_RDONLY);
dfd2 = openat(dfd, "", O_EMPTY_PATH | O_RDONLY | O_DIRECTORY);