Function dispatch_io_create_with_path 

pub unsafe extern "C" fn dispatch_io_create_with_path(
    type_: dispatch_io_type_t,
    path: *const c_char,
    oflag: c_int,
    mode: mode_t,
    queue: dispatch_queue_t,
    cleanup_handler: *mut c_void,
) -> dispatch_io_t

Apple SDK function dispatch_io_create_with_path.