单实例批处理文件？ [英] Single instance batch file?

问题描述

:: dostuff.bat
@echo off
:: insert long-running process call here
: End

我可以添加到这个批处理文件是什么让它终止，如果当它执行它已经在另一个进程中运行？

What can I add to this batch file to make it terminate if it's already running in another process when it's executed?

推荐答案

哦，如果有可能是有史以来唯一只有一个实例，那么你也许可以用地方创建一个虚拟文件，可能是在临时目录中执行此操作：

Well, if there can be only exactly one instance ever, then you can probably do this by creating a dummy file somewhere, probably in the temp directory:

copy NUL "%TEMP%\dostuff_is_doing_stuff.tmp"

您然后删除它，你就大功告成了之后：

you then remove it after you're done:

del "%TEMP%\dostuff_is_doing_stuff.tmp"

和在批处理文件的开始，你可以检查文件是否存在，并相应地退出：

and at the start of the batch file you can check whether that file exists and exit accordingly:

if exist "%TEMP%\dostuff_is_doing_stuff.tmp" (
    echo DoStuff is already running. Exiting ...
    exit /b 1
)

同样的，你可以做到这一点通过改变窗口的标题，这也应该是对更强大的一个<大骨节病>控制 + <大骨节病> C 'ED或崩溃批处理文件。

Similarly, you can do that by changing the window title, which should also be more robust against a Ctrl+C'ed or crashed batch file.

设置标题：

title DoStuff

重新设置它算账：

Re-set it afterwards:

title Not doing stuff

检查吧：

tasklist /FI "WINDOWTITLE eq DoStuff"

但是，这有一个问题：在CMD以管理员身份运行，你会得到管理员：DoStuff作为标题。不与任务列表不再匹配。也通过检查你能砍，解决它。管理员：DoStuff，但可能会因Windows用户界面语言神态各异，所以它可能不是最好的解决办法

However, this has one problem: When cmd runs as administrator you'll get "Administrator: DoStuff" as the title. Which doesn't match anymore with tasklist. You can hack-solve it by also checking for "Administrator: DoStuff" but that might look different depending on the Windows UI language, so it's probably not the best solution.

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