windows %CD% 变量行为在右键单击并以管理员身份运行时有所不同
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%CD% variable behaviour differs when right click and use run as admin
提问by Pedro Santos
I have a windows cmd file that is making use of the %CD% environment variable to determine the execution directory of the cmd file.
我有一个 Windows cmd 文件，它使用 %CD% 环境变量来确定 cmd 文件的执行目录。
When I run the cmd file from the command line it works correctly, meaning that the %CD% variable contains the working directory. If I double left click the cmd it also works as I expect. However if I right click the cmd file and select runas administrator then the %CD% variable contains the value "C:\Windows\system32" not the curent directory where the cmd is executing.
当我从命令行运行 cmd 文件时，它可以正常工作，这意味着 %CD% 变量包含工作目录。如果我左键双击 cmd，它也可以按我的预期工作。但是，如果我右键单击 cmd 文件并选择 runas administrator，则 %CD% 变量包含值“C:\Windows\system32”，而不是执行 cmd 的当前目录。
I was able to reproduce the problem with the following script:
我能够使用以下脚本重现该问题：
echo %CD%
pause
回答by ewall
Trying using %~dp0instead of %cd%... this should give you the directory which contains the batch (NT shell) script was launched from in any case.
尝试使用%~dp0而不是%cd%......这应该会给你包含在任何情况下启动的批处理（NT shell）脚本的目录。
回答by Anders
Are you confusing working/current directory with the directory your batch file is in?
您是否将工作/当前目录与批处理文件所在的目录混淆了？
If I have a simple batch file with just
如果我有一个简单的批处理文件
@echo off
echo %cd%
and this is stored in c:\foo\bar\test.cmd
这存储在 c:\foo\bar\test.cmd
In cmd I execute
在 cmd 我执行
cd c:\foo
bar\test
test.cmd will print c:\fooand not c:\foo\bar
test.cmd 将打印c:\foo而不是c:\foo\bar
I assume UAC uses system32 since it is possible to elevate with a different user and that user might not have access to whatever the current directory is.
我假设 UAC 使用 system32，因为可以使用不同的用户进行提升，并且该用户可能无法访问当前目录的任何内容。
If you want the directory your batch file is in, use %~dp0, if you want the current directory, use . or %CD%
如果您想要批处理文件所在的目录，请使用 %~dp0，如果您想要当前目录，请使用 . 或 %CD%
