O_DIRECTORY
fd = _open(name, O_RDONLY | O_NONBLOCK | O_DIRECTORY | O_CLOEXEC);
dfd = _open("/var/run/shm", O_RDONLY|O_DIRECTORY);
dfd = _open("/tmp", O_RDONLY|O_DIRECTORY);
dfd = _open("/var/run/shm", O_RDONLY|O_DIRECTORY);
dfd = _open("/tmp", O_RDONLY|O_DIRECTORY);
if (vp->v_type != VDIR && (fmode & O_DIRECTORY)) {
flags |= O_DIRECTORY;
fd = open(dmp->dm_path, O_DIRECTORY);
vap, O_DIRECTORY);