windows - How to use nircmd.exe and set filename %~nF in batch for loop

I'm trying to write a batch file that iterates through each filename, takes part of the strings, and sets the created and modified dates. Mind you, dirpath is a placeholder for actual path.

@echo off
setlocal enabledelayedexpansion
FOR /R dirpath %F in (*.*) DO (SET FNAME=%~nF SET MM=%FNAME:~0,2% SET DD=%FNAME:~2,2% SET YY=%FNAME:~4,2% nircmd.exe setfiletime %F "%DD% %MM%-20%YY% 00:00:00" "%DD%-%MM%-20%YY% 00:00:00")

I'm not sure how to even troubleshoot what the script is doing - pause doesn't pause the program after the loop. How can this be rewritten to function?

Answer

How can this be rewritten to function?

You have a number of problems with your batch file:

• It's not %f. You need use %%f instead. %f is for a command line, that needs fixing in at least 3 places.


• I would put the commands inside the do ( ... ) on separate lines.


• You can put a pause before the closing )


• You can comment out the first line with rem to see what the batch file is doing.


• Add echo to the payload line with nircmd.


• Remove the echo when you think it's working.


• You need in some places to use ! instead of % inside the forloop (that's what enabledelayedexpansion is for - it enables variables to be expanded at execution time rather than at parse time

Start with the following batch file (I've fixed the main mistakes for you):

@echo off
setlocal enabledelayedexpansion
for /r dirpath %%F in (*.*) DO (
  set FNAME=%%~nF
  SET MM=!FNAME:~0,2!
  SET DD=!FNAME:~2,2!
  SET YY=!FNAME:~4,2!
  echo nircmd.exe setfiletime %%F "!DD!-!MM!-20!YY! 00:00:00" "!DD!-!MM!-20!YY! 00:00:00"
  pause
  )
endlocal

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Further Reading

• An A-Z Index of the Windows CMD command line - An excellent reference for all things Windows cmd line related.


• enabledelayedexpansion - Delayed Expansion will cause variables to be expanded at execution time rather than at parse time.


• for /r - Loop through files (Recurse subfolders).


• set - Display, set, or remove CMD environment variables. Changes made with SET will remain only for the duration of the current CMD session.


• setlocal - Set options to control the visibility of environment variables in a batch file.