@echo off
echo ---------------------------------
echo REPLACE ALL THE FILE NAMEs by LIST.TXT
echo The format of LIST.TXT should be below;
echo Old Name,New Name
echo                 ---by S.J a freshman of programmer
echo ---------------------------------
echo Press [y] and Enter key to backup the files before replacing.
echo Press [n] and Enter key If you want to replace without backup.
echo Yes or no?

set "listfile=list.txt"
for /f "tokens=2 delims==" %%i in ('wmic path win32_operatingsystem get LocalDateTime /value ^| find "="') do set datetime=%%i
set now=%datetime:~,14%
set input=
set /p input=Please enter your choice[y/n]:
:: Rename .txt and.pkg files
for /f "tokens=1,2 delims=," %%i in ('type "%listfile%"') do (
    if not exist "%%i.txt" (
        if not exist Log_%now%.txt echo;non-existent files:>Log_%now%.txt
        >>Log_%now%.txt echo;%%i_%%j
    ) else (
        if /i "%input%"=="y" (
            md Backup%now%\ 2>nul
            copy "%%i.txt" Backup%now%\
        )
        ren "%%i.txt" "%%j.txt"
    )
)
cls
if exist Log_%now%.txt type Log_%now%.txt
pause
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