filehandle.writev(buffers[, position])

    <ArrayBufferView> 的数组写入文件。

      Write an array of <ArrayBufferView>s to the file.

      The promise is resolved with an object containing a two properties:

      It is unsafe to call writev() multiple times on the same file without waiting for the promise to be resolved (or rejected).

      On Linux, positional writes don't work when the file is opened in append mode. The kernel ignores the position argument and always appends the data to the end of the file.