BAT文件（批處理）中的嵌套循環返回不期望的結果

Question

我有以下代碼。除了一些問題，它的效果很好。首先，我的「如果不是空白」檢查根本不起作用。其次，每次迭代過程中，它最後一次傳遞服務器名稱爲服務器名和文件夾兩個，這我真的不理解......

代碼

SET servers=server01,server02 
SET drive=c 
SET root=program files (x86)\test\ 
SET backup=%root%\backup 
SET folders=folder01\,folder02\file01.txt 


FOR %%b in (%servers%) do (
    FOR %%a in (%folders% %%b) DO (
     if not %%a == "" call :backup %%b %%a 
    ) 
) 


:backup 
SET currentfile="\\%1\%drive%$\%2" 
setlocal 
echo Backing Up %currentfile% 
REM mkdir "\\%1\%drive%$\%backup%" 
REM xcopy /I 
exit /b 
endlocal 
goto :end 

輸出

1] Backing Up "\\server01\c$\folder01\" 
2] Backing Up "\\server01\c$\folder02\file01.txt" 
3] Backing Up "\\server01\c$\server01" 
4] Backing Up "\\server02\c$\folder01\" 
5] Backing Up "\\server02\c$\folder02\file01.txt" 
6] Backing Up "\\server02\c$\server02" 
7] Backing Up "\\\c$\" 

正如你所看到的，第3,6和7行是不需要的。

Answer 1

第3行和第6行是由於內部for循環中的%%b引起的。第7行是由於腳本在循環後沒有終止而引起的，因此它在末尾再次運行:backup代碼。

下似乎得到期望的結果：

@echo off 

SET servers=server01,server02 
SET drive=c 
SET root=program files (x86)\test\ 
SET backup=%root%\backup 
SET folders=folder01\,folder02\file01.txt 


FOR %%b in (%servers%) do (
    FOR %%a in (%folders%) DO (
     rem echo a is %%a 
     if not %%a == "" call :backup %%b %%a 
    ) 
) 

exit /b 


:backup 
SET currentfile="\\%1\%drive%$\%2" 
setlocal 
echo Backing Up %currentfile% 
REM mkdir "\\%1\%drive%$\%backup%" 
REM xcopy /I 
endlocal