batch-file - 批处理脚本在失败时不提高 ERRORLEVEL

Question

我正在学习 Windows 批处理脚本。当复制、移动或删除操作失败时，我需要提出错误。我制作了一个示例脚本，由于某种原因，当操作失败时，我无法让 ERRORLEVEL 上升。我运行脚本，文件不存在或在另一个程序中打开，stderr 消息输出到控制台，但 ERRORLEVEL 从未上升，这是为什么？另外，如果我无法让 ERRORLEVEL 上升，有没有什么方法可以将 stderr 传递到我可以检查的变量中？

我的代码如下:

`@Echo Off
ECHO.
Set /P myVar=Please enter a value:
Echo var = %myVar%
ECHO Trying to delete the file dummy.csv >> log.txt
Set myVar2 = nothing
DEL C:\dummy420.csv  
IF NOT ERRORLEVEL 0 ECHO There was an error
ECHO %ERRORLEVEL%
REM 2>myVar2
REM Echo 2>
REM Echo %myVar2%
Echo 2>&1
REM && (echo yourCommand was successful) || (echo yourCommand failed)
IF NOT ERRORLEVEL 0 ECHO There was an error
ECHO %ERRORLEVEL%
Move ""C:\dummy420.csv" D:\"
IF NOT ERRORLEVEL 0 ECHO There was an error
Set /P dummy=Press Enter to End`

这是我的输出:

Please enter a value:hello
var = hello
C:\dummy420.csv
The process cannot access the file because it is being used by another process.
0
ECHO is off.
0
The filename, directory name, or volume label syntax is incorrect.
Press Enter to End

Answer 1

DEL 命令不会更改错误级别 - more info 检查 debenham 建议以检测删除失败:

3>&2 2>&1 1>&3 del C:\dummy420.csv|findstr . && echo DEL failed || echo DEL succeeded

更改错误级别:

3>&2 2>&1 1>&3 del C:\dummy420.csv|findstr .&& cmd /c exit /b 1