什么是% 0 |% 0? 它是如何工作的？

如果你运行一个。蝙蝠或者。Cmd 文件与 %0|%0内，您的计算机开始使用大量的内存和几分钟后，是重新启动。为什么这个代码会阻止你的 Windows？这段代码通过编程实现了什么功能？它可以被认为是一个“错误”吗？

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%0 will never end, but it never creates more than one process because it instantly transfers control to the 2nd batch script (which happens to be itself).

But a Windows pipe creates a new process for each side of the pipe, in addition to the parent process. The parent process can't finish until each side of the pipe terminates. So the main program with a simple pipe will have 3 processes. You can see how the bomb quickly get's out of control if each side of the pipe recursively calls the parent batch!

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最佳答案

This is the Windows version of a fork bomb.

%0 is the name of the currently executing batch file. A batch file that contains just this line:

%0|%0

Is going to recursively execute itself forever, quickly creating many processes and slowing the system down.

This is not a bug in windows, it is just a very stupid thing to do in a batch file.

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This is known as a fork bomb. It keeps splitting itself until there is no option but to restart the system. http://en.wikipedia.org/wiki/Fork_bomb

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It's a logic bomb, it keeps recreating itself and takes up all your CPU resources. It overloads your computer with too many processes and it forces it to shut down. If you make a batch file with this in it and start it you can end it using taskmgr. You have to do this pretty quickly or your computer will be too slow to do anything.

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What it is:

%0|%0 is a fork bomb. It will spawn another process using a pipe | which runs a copy of the same program asynchronously. This hogs the CPU and memory, slowing down the system to a near-halt (or even crash the system).

How this works:

%0 refers to the command used to run the current program. For example, script.bat

A pipe | symbol will make the output or result of the first command sequence as the input for the second command sequence. In the case of a fork bomb, there is no output, so it will simply run the second command sequence without any input.

Expanding the example, %0|%0 could mean script.bat|script.bat. This runs itself again, but also creating another process to run the same program again (with no input).


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