Function fuse_reply_data 

pub unsafe extern "C" fn fuse_reply_data(
    req: fuse_req_t,
    bufv: *mut fuse_bufvec,
    flags: fuse_buf_copy_flags,
) -> c_int

Reply with data copied/moved from buffer(s)

Possible requests: read, readdir, getxattr, listxattr

@param req request handle @param bufv buffer vector @param flags flags controlling the copy @return zero for success, -errno for failure to send reply