There are several ways google throws at me for checking if a file is empty but I need to do the opposite.
If (file is NOT empty)
do things
How would I do this in batch?
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4 Answers
for /f %%i in ("file.txt") do set size=%%~zi
if %size% gtr 0 echo Not empty
5 Comments
Tertium
returns: >>unexpected 0
Jesse Chisholm
@Tertium - The fix is to add
set size=0 on the line before the for loop.
im_chc
@Tertium I think you forgot the double quotes in for /f %%i in ("file.txt") - that's what I did and adding them back fixed the problem
user3029478
Quick fix for if that returns an empty result, but a leading 0, like: if 0%size% GTR 0 echo Not empty
bmi
This solution not work in windows 10
this should work:
for %%R in (test.dat) do if not %%~zR lss 1 echo not empty
help if says that you can add the NOT directly after the if to invert the compare statement
1 Comment
Christian4145
shouldn't there be a Switch after if like: for %%R in (test.dat) do if /i not %%~zR EQU 0 echo not empty
set "filter=*.txt"
for %%A in (%filter%) do if %%~zA==0 echo."%%A" is empty
Type help for in a command line to have explanations about the ~zA part
Comments
You can leverage subroutines/external batch files to get to useful parameter modifiers which solve this exact problem
@Echo OFF
(Call :notEmpty file.txt && (
Echo the file is not empty
)) || (
Echo the file is empty
)
::exit script, you can `goto :eof` if you prefer that
Exit /B
::subroutine
:notEmpty
If %~z1 EQU 0 (Exit /B 1) Else (Exit /B 0)
Alternatively
notEmpty.bat
@Echo OFF
If %~z1 EQU 0 (Exit /B 1) Else (Exit /B 0)
yourScript.bat
Call notEmpty.bat file.txt
If %errorlevel% EQU 0 (
Echo the file is not empty
) Else (
Echo the file is empty
)
1 Comment
kindall
This worked great for me. I switched it around so it was called
empty rather than notEmpty, though.