struct fastbuf *fbdir_open(byte *name, uns mode, struct asio_queue *io_queue);
struct fastbuf *fbdir_open_try(byte *name, uns mode, struct asio_queue *io_queue);
struct fastbuf *fbdir_open_fd(int fd, struct asio_queue *io_queue);
struct fastbuf *fbdir_open(byte *name, uns mode, struct asio_queue *io_queue);
struct fastbuf *fbdir_open_try(byte *name, uns mode, struct asio_queue *io_queue);
struct fastbuf *fbdir_open_fd(int fd, struct asio_queue *io_queue);