检查目录是否在BAT脚本中可写的最佳方法? [英] Best way to check if directory is writable in BAT script?

问题描述

如何检查执行用户是否可以从批处理脚本中写入目录?

How can I check whether a directory is writable by the executing user from a batch script?

这是我到目前为止尝试过的:

Here's what I've tried so far:

> cd "%PROGRAMFILES%"

> echo. > foo
Access is denied.
> echo %ERRORLEVEL%
0

好吧，那...

> copy NUL > foo
Access is denied.
> echo %ERRORLEVEL%
0

不是吗?那怎么...

Not that either? Then what about...

> copy foo bar
Access is denied.
        0 file(s) copied.
> echo %ERRORLEVEL%
1

这有效，但是如果文件不存在，则会中断.

This works, but it breaks if the file doesn't exist.

我已经读过一些关于内部命令的信息，但没有设置ERRORLEVEL，但是copy显然在最后一种情况下是这样做的.

I've read something about internal commands not setting ERRORLEVEL, but copy obviously seems to do so in the last case.

推荐答案

一定要针对它运行命令，以查找是否被拒绝是执行此操作的简便方法.您还可以使用CACLS来查找权限到底是什么还是没有权限.这是一个示例.

Definitely running a command against it to find if its denied is the easy way to do it. You can also use CACLS to find exactly what the permissions are or aren't. Here's a sample.

在CMD中，键入CACLS /?

CACLS "filename"将为您提供文件当前允许的权限. R =读，W =写，C =更改(与写相同?)，F =完全访问.

CACLS "filename" will give you what the current permissions is allowed on the file. R = Read, W = Write, C = Change (same as write?), F = Full access.

您也可以使用目录名称.

You can use directory name as well.

要进行检查，您将:

FOR /F "USEBACKQ tokens=2 delims=:" %%F IN (`CACLS "filename" ^| FIND "%username%"`) DO (
 IF "%%F"=="W" (SET value=true && GOTO:NEXT)
 IF "%%F"=="F" (SET value=true && GOTO:NEXT)
 IF "%%F"=="C" (SET value=true && GOTO:NEXT)
 SET value=false
)
ECHO This user does not have permissions to write to file.
GOTO:EOF
:NEXT
ECHO This user is able to write to file.

这篇关于检查目录是否在BAT脚本中可写的最佳方法?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！