I am trying to rename some log files to yesterday's date when the batch file creates a new file of same name every night.
We can rename the file to today's date using the below cmd
ren SampleDTE.TXT SampleDTE-%date:~10,4%%date:~7,2%%date:~4,2%_%time:~0,2%%time:~3,2%.TXT This results in file renamed to // SampleDTE-YYYYDDMM_hhmm.TXT
SampleDTE-20132712_1243.TXT I wanted to know how to re-name the file to yesterday's date. Something like
SampleDTE-20132612_1243.TXT Thanks in advance
The easy way - assuming that you run this regularly, once per day
FOR /f %%a IN (sampledteyesterday.txt) DO ECHO ren SampleDTE.TXT SampleDTE-%%a_%time:~0,2%%time:~3,2%.txt > sampledteyesterday.txt ECHO %date:~10,4%%day%%date:~4,2% Note - ren command simply ECHOed. when verified, remove the ECHO keyword before the REN to activate.
You'll need to set up your sampledteyesterday.txt file containing a single line YYYYDDMM for yesterday to initialise.
Suggestion: use YYYYMMDD which sorts easier or more logically...
You will have to use a variable and do the math:
set /a day=%date:~7,2% - 1 ren SampleDTE.TXT SampleDTE-%date:~10,4%%day%%date:~4,2%_%time:~0,2%%time:~3,2%.TXT To avoid date arithmetics, you can store yesterday date in, eg, file.
yesterday.txt (contains today and yesterday):
20131227 20131226 Batch file:
REM Get today (to check if yesterday.txt is valid): SET today=%DATE:~10,4%%DATE:~7,2%%DATE:~4,2% REM Read file: FOR /F "TOKENS=1,2" %%d IN (yesterday.txt) DO ( SET stored_today=%%d SET yesterday=%%e ) REM If stored_today not equal to today, assume yesterday is stored_today and update file: IF NOT "%stored_today%" == "%today%" ( SET yesterday=%stored_today% >yesterday.txt ECHO %stored_today% %today% ) REM Test if yesterday is set, exit otherwise. IF "%yesterday%"=="" ECHO Yesterday unknown! Try again tomorrow.&GOTO:EOF To make it work correctly first time, yesterday.txt must be manually filled.
This will get yesterdays date, using VBS in a batch file.
It's reliable in all locales, whereas the %date% variable can be different on different computers, and different users.
@echo off set day=-1 echo >"%temp%\%~n0.vbs" s=DateAdd("d",%day%,now) : d=weekday(s) echo>>"%temp%\%~n0.vbs" WScript.Echo year(s)^& right(100+month(s),2)^& right(100+day(s),2) for /f %%a in ('cscript /nologo "%temp%\%~n0.vbs"') do set "result=%%a" del "%temp%\%~n0.vbs" set "YYYY=%result:~0,4%" set "MM=%result:~4,2%" set "DD=%result:~6,2%" set "date-yesterday=%yyyy%-%mm%-%dd%" echo Yesterday was "%date-yesterday%" pause