bash脚本,在给定超时之后杀死一个子进程 [英] Bash script that kills a child process after a given timeout

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问题描述

我有一个启动一个子进程崩溃(实际上,挂起)不时与没有明显的原因bash脚本(封闭源代码,所以没有太多我可以做些什么)。因此,我希望能够推出这个过程给定的时间量,并杀死它,如果它没有一个特定的时间量之后成功返回。

I have a bash script that launches a child process that crashes (actually, hangs) from time to time and with no apparent reason (closed source, so there isn't much I can do about it). As a result, I would like to be able to launch this process for a given amount of time, and kill it if it did not return successfully after a given amount of time.

有一个简单强大的的方式来实现这一目标使用bash?

Is there a simple and robust way to achieve that using bash?

P.S:告诉我,如果这个问题更适合于serverfault或超级用户。

P.S.: tell me if this question is better suited to serverfault or superuser.

推荐答案

(曾经出现在:
BASH FAQ条目#68:我如何运行一个命令,并将其N秒后中止(超时)?

如果你不介意下载使用成才暂停命令和apt-get安装超时),并用它这样的:

If you don't mind downloading someting use timeout (sudo apt-get install timeout) and use it like:

timeout 10 ping www.goooooogle.com

如果你不想下载的东西做什么超时内部所做的:

If you don't want to download something do what timeout does internally:

( cmdpid=$BASHPID; (sleep 10; kill $cmdpid) & exec ping www.goooooogle.com )

在您要为更多的bash code做了超时,使用第二个选项这样的情况:

In the case that you want to do a timeout for more bash code, use the second option as such:

( cmdpid=$BASHPID; 
    (sleep 10; kill $cmdpid) \
   & while ! ping -w 1 www.goooooogle.com 
     do 
         echo crap; 
     done )

这篇关于bash脚本,在给定超时之后杀死一个子进程的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!

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