Batch file attribute check

Question

I'm having a little troubles with my script in .bat. My task is to write a script that will check a file for a few things. I've already defined some of those things, but now I'm stuck. My problem is that I don't know how to define a condition that says: If the file is hidden or read-only, delete this attribute and write some info about the change to the file (some text).

And then I'm having a second problem and that is that the script has always to write something to the file, but when I try to write something to the file (while the script is running) and then I save it, there is always just the thing the script has to write in it. Would somebody please give me some advice? I'm a novice. Thanks a lot for all the responses.

here is the script itself:

@echo off
title file-checking script
set file="file.txt"
set maxbytesize=1
type NUL > file.txt
pause
:loop
if exist file.txt @echo ok> file.txt
if not exist file.txt type NUL > file.txt
FOR /F "usebackq" %%A IN ('%file%') DO set size=%%~zA
if %size% LSS %maxbytesize% (
    echo.File is under %maxbytesize% byte
) ELSE (
    del file.txt
)
timeout/t 2 
goto loop

PA. · Accepted Answer · 2014-12-17 15:39:33Z

1

read HELP FOR and you will notice that checking the attributes is similar to checking the file size

 set ATTRS=%%~aA

edited Dec 17, 2014 at 15:39

answered Dec 17, 2014 at 15:20

PA.

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1 Comment

rojo Over a year ago

I think you meant help for.

dbenham · Accepted Answer · 2014-12-17 15:55:14Z

1

Use >> instead of > to append data to an existing file, preserving existing content. The > redirection will overwrite any existing content.

You can use the following to test if a file is hidden (after you have proven that it exists):

dir /b /ah file.txt >nul 2>nul && (
  echo file is hidden
) || (
  echo file is not hidden
)

answered Dec 17, 2014 at 15:55

dbenham

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