OF_seek
return OF_seek(OF_fd, offset);
if (OF_seek(dev->handle, pos) < 0)
int OF_seek(int handle, u_quad_t pos);
if (OF_seek(dev->handle, pos) < 0)
int OF_seek(u_int handle, u_int64_t pos);
int OF_seek(int handle, u_quad_t pos);