Linux信号相关函数在观看本章节内容之前，建议先弄清楚Linux的内核信号的模型，链接： https://blog.csdn.net/niceffking/article/details/157553326?fromshare=blogdetail&sharetype=blogdetail&sharerId=157553326&sharerefer=PC&sharesource=niceffking&sharefrom=from_linkhttps://blog.csdn.net/niceffking/article/det