https://rifco.ru/blog/2016/08/23/%d0%b0%d1%83%d0%b4%d0%b8%d1%82-%d1%83%d1%8f%d0%b7%d0%b2%d0%b8%d0%bc%d0%be%d1%81%d1%82%d0%b5%d0%b9-linux-c-vulners-com/