本文介绍了这个 bash fork 炸弹是如何工作的?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!

问题描述

根据维基百科,以下是一个非常优雅的 bash fork 炸弹:

According to Wikipedia, the following is a very elegant bash fork bomb:

:(){ :|:& };:

它是如何工作的?

推荐答案

分解,分为三大块:

:()      # Defines a function, ":". It takes no arguments.
{ ... }; # The body of the function.
:        # Invoke the function ":" that was just defined.

在body内部,函数被调用两次,管道后台运行;对进程的每次连续调用都会产生对:"的更多调用.这会迅速导致系统资源的爆炸性消耗,使事情陷入停顿.

Inside the body, the function is invoked twice and the pipeline is backgrounded; each successive invocation on the processes spawns even more calls to ":". This leads rapidly to an explosive consumption in system resources, grinding things to a halt.

请注意,调用一次,无限递归,还不够好,因为这只会导致原始进程的堆栈溢出,这很混乱但可以处理.

Note that invoking it once, infinitely recursing, wouldn't be good enough, since that would just lead to a stack overflow on the original process, which is messy but can be dealt with.

更人性化的版本如下所示:

A more human-friendly version looks like this:

kablammo() {             # Declaration
  kablammo | kablammo&   # The problematic body.
}; kablammo              # End function definition; invoke function.

威廉在下面的评论是对我上面所说的更好的措辞,因此我进行了编辑以纳入该建议.

William's comment below was a better wording of what I said above, so I've edited to incorporate that suggestion.

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08-28 06:17
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