I need to check whether a file is created and locked or not, using a batch file, if the file is locked the program should wait and check periodically whether the file is released from lock, and when it gets unlocked the program should exit.
I am very new to writing batch files (started today)
This is what I have tried:
@echo off
:loop
if (2<nul (>>test.txt echo off))(
goto END
)
else (goto MESSAGE)
:MESSAGE
echo trying to access file
goto loop
:END
pause
You were close :) But you cannot use IF to directly test whether a command succeeded or not. Use the || conditional operator instead.
Assuming you mean Windows, and not DOS:
@echo off
:loop
2>nul (
(call ) >>test.txt
) || (
echo Trying to access file
timeout /nobreak 1 >nul
goto loop
)
(call ) is simply a very efficient way to perform a no-op that always returns success.
The TIMEOUT introduces a 1 second delay to prevent the loop from hogging CPU resources.
See How to check in command-line if a given file or directory is locked (used by any process)? for more info on how the above works.
