[{"data":1,"prerenderedAt":232},["ShallowReactive",2],{"tag-子进程-1":3},{"title":4,"articles":5,"hot_article":17,"month_arch":80,"total":228,"cover":229},"子进程 - 独孤影的博客",[6],{"id":7,"title":8,"uri":8,"author":9,"tags":10,"created_at":14,"view_count":15,"content":16},47,"关于kill进程链","duguying",[11,12,13],"进程","子进程","kill","2016-09-30 00:02:21",2926,"\u003Cp>之前在做 Goj 项目的时候执行服务器部分使用 go 语言 kill 进程，发现无法 kill 该进程的子进程，后来发现貌似别的语言也无法直接 kill 掉当前进程的子进程链。kill 子进程链的应用场景是这样的，我在做 judger服务器的时候发现我调用 gcc 编译源码会在某些极端的情况下卡死，然后卡死后我需要 kill 掉 gcc 的进程，我使用 go 语言的相关 api kill 掉 gcc (因为我拿得到 gcc 的进程 id)，然而，我发现 gcc 会调用别的命令，记忆中貌似是一个叫做 ar 的命令，实际上是这个子进程卡死了，于是我 kill 掉身为父进程的 gcc 之后，它的子进程依然存在，变成了孤儿进程，继续卡着。但是我没有 api 可以拿到 gcc 卡死的子进程的进程 id，所以我也无法 kill 掉它。我当时的临时解决方案是调用 killall 命令去按照名称杀掉它。\u003C\u002Fp>\u003Cp>之后一次在某个群里提到这件事情，随口问了一句如何获取某个进程的子进程，linux api 中是没有这种 api 的，一位同学提醒了我，你可以从 \u002Fproc 目录中查。今天我用 go 语言实现了它，linux 系统中 \u002Fproc 目录记录了所有的进程信息，但是这些信息中依然没有记录某个信息的子进程，不过它记录了某个进程的父进程，于是我遍历了 \u002Fproc 目录中的所有进程的进程信息，然后根据进程的父代关系构成了一颗进程树，这颗树的顶端必定是 init 进程，于是，我便可以从这颗进程树上从上往下搜索查找出某个进程的子进程了。这样一来，一个简单的进程树便可以让我轻松的查找出某进程的子进程，同样也可以 kill 掉某颗进程树，将当前进程及其子进程 kill 掉已经不再是一件难事了。\u003C\u002Fp>\u003Cp>如果你对此感兴趣，欢迎参阅源码 \u003Ca href=\"https:\u002F\u002Fgithub.com\u002Fgojudge\u002Fproc\" _src=\"https:\u002F\u002Fgithub.com\u002Fgojudge\u002Fproc\">https:\u002F\u002Fgithub.com\u002Fgojudge\u002Fproc\u003C\u002Fa> \u003C\u002Fp>\u003Cp>最后，我要说明的一点是：世界上没有什么事情是一棵树解决不了的，如果有，那么两颗树一定能够解决。\u003C\u002Fp>",{"title":18,"list":19},"最热文章",[20,26,32,38,44,50,56,62,68,74],{"id":21,"title":22,"uri":23,"author":9,"created_at":24,"view_count":25},28,"docker容器目录与主机目录同步","\u002Farticle\u002Fdocker容器目录与主机目录同步","2014-12-31 12:34:08",15570,{"id":27,"title":28,"uri":29,"author":9,"created_at":30,"view_count":31},21,"beego中使用fis","\u002Farticle\u002Fbeego中使用fis","2014-12-03 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