在文本文件中讀取第n行並在MS批處理中處理

Question

嗯..我需要的實際上只是讀取明文文件的第n行並保存在變量中以便在批處理中進一步處理。所以我一直在搜索相當長的時間，並找到了很多解決方案（全部在for循環中）。還有很多這裏堆棧溢出，但很好，沒有爲我工作。

這裏是我嘗試了

for /f "skip=%toskip%" %%G IN (passwd.txt) DO if not defined line set "line=%%G" 

所以在這裏我的項目細節的一種方式的示例。

內容：pwcracker.bat（在下文示出）
要求：7za.exe，passwd.txt（每行1個可能的密碼數據庫）

pwcracker.bat：

@echo on 

    for /f %%i in ("passwd.txt") do set size=%%~zi 
    if %size% leq 0 (
    echo Please create a dictionary of passwords first [File not found: passwd.txt]!>result.txt 
    exit 1 
    ) 

    @Overwrite result.txt if it exists 
    echo [RESULT]>result.txt 

    @Try to delete the log if it exists 
    IF EXIST logging.txt del /F logging.txt 

    @REM If the file wasn't deleted for some reason, stop and error 
    IF EXIST logging.txt (
    echo The log file must be removed!>>result.txt 
    exit 1 
    ) 

    @Ask user for the file to unzip 
    set /p filename=Enter 7z filename [name.7z]: 

    @Check amount of PWs to try within the dictionary 
    cls 
    setlocal EnableDelayedExpansion 
    set "cmd=findstr /R /N "^^" passwd.txt | find /C ":"" 

    @Set the amount to try 
    for /f %%a in ('!cmd!') do set tries=%%a 

    @#################################### 

    @Begin the for loop to try all PWs until unzipped or all PWs are tried 
    FOR /L %%X IN (1,1,%tries%) DO (

    @Set PW to try 
    @CODE INPUT TO READ AND STORE PW in local variable %passwd% 

    @try to unzip using the given password and log the output 
    7za e %filename% -o%CD%\unzipped -p%passwd%>>logging.txt 

    @check the size of the log file 
    for /f %%i in ("logging.txt") do set size=%%~zi 

    @see whether it was succesful and log the tried password in the resuts 
    findstr /m "Error" logging.txt 
    if %errorlevel%==1 (
     echo It didn't work with PW: %passwd%>>result.txt 

     @Try to delete the log if it exists 
     IF EXIST logging.txt del /F logging.txt 

     @REM If the file wasn't deleted for some reason, stop and error 
     IF EXIST logging.txt (
     echo The log file couldn't be removed!>>result.txt 
     exit 1 
    ) 
     @end of error-check clause 
    ) 


    else (
     if %size% leq 0 (
     echo Something went wrong, please check manually>result.txt 
     echo Tried PW : %passwd% >>result.txt 
     exit 1 
    ) 
    @end of prior else block 
    ) 

    else (
    echo Unzipped succesfully with PW: %passwd%>result.txt 
    exit 1 
    ) 

    @end of for loop (1,1,tries) 
    ) 

這個批處理文件基本上只是「破解」我的aes加密的7zip文件，因爲我錯誤輸入了密碼，不知道它是什麼。是的，像7zcracker這樣的工具不工作，並最終陳述「密碼爲1」，但這個「工具」可以看到在解壓縮過程中是否有「錯誤」（因爲只有數據被加密，而不是名稱，7z文件可以「解壓」，但內容的大小爲0 ofc）

Answer 1

您不需要獲得tries的編號。只需閱讀密碼文件中的每一行即可。

FOR /F "usebackq tokens=*" %%p IN (`TYPE passwd.txt`) DO (
    ECHO Trying password %%p 
    REM try the password 
)