linux下模拟按键按下

https://vimsky.com/examples/detail/cpp-ex-----XTestFakeKeyEvent-function.html

https://blog.csdn.net/dragoo1/article/details/115726327

http://t.zoukankan.com/evilloop-p-2205895.html

https://www.cnblogs.com/chaichengxun/p/15425727.html