在将输出重定向到批处理文件中的文件时异步执行命令？ [英] Execute a command asynchronously while redirecting the output to a file in a batch file?

问题描述

假设在批处理文件中，我要异步执行 myCommand （无需等待它完成）。我不想在新的控制台窗口中执行 myCommand 。

Let's say in a batch file, I want to execute myCommand asynchronously (without waiting for it to finish). And I don't want to execute myCommand in a new console window.

同时，我要重定向 em> myCommand to output.txt

At the same time, I want to redirect the output of myCommand to output.txt

所以在批处理文件中，如果我写

So in the batch file, if I write

START myCommand > output.txt

output.txt将为空，我会看到一个新窗口。

output.txt will be empty and I will see a new window.

如果我写

myCommand > output.txt

那么我无法异步执行。

有没有办法，我可以实现所有这三个要求？ （异步，没有新窗口，重定向输出）

Is there any way I can achieve all these three requirements? (asynchronously, no new window, redirect output)

谢谢！

推荐答案

p>我没有完全测试，但我认为这可能工作：

I haven't tested it fully, but I think this may work:

start /b "" myCommand >output.txt

我相信这两种形式都很好 - 唯一的区别是如果标准错误被重定向，START无法启动myCommand。

I believe both forms work fine - the only difference is if standard error is redirected as well and START fails to launch myCommand.

重定向START：将myCommand和START输出重定向到该文件。

Redirecting START: both myCommand and START output are redirected to the file.

start /b "" myCommand >output.txt >2&1

仅重定向myCommand：仅重定向myCommand输出。任何START错误信息将出现在屏幕上。请注意，我选择避免重定向，而不是使用引号如jeb 。

Redirecting myCommand only: Only myCommand output is redirected. Any START error message will appear on the screen. Note, I opted to escape the redirection instead of using quotes like jeb.

start /b "" myCommand ^>output.txt ^>2^&1

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