https://cloud.tencent.com/developer/article/1592678 htt […]

https://www.cnblogs.com/LUO77/p/5804436.html

官方文档： https://linux.die.net/man/ linux api的速查手册： https:

signal信号的介绍： https://blog.csdn.net/m0_50502677/article/

https://blog.csdn.net/qq_29344757/article/details/78657