CODEWITHSUNDEEP
windowsfilebatch-filecmdfilecompare
Zdravko Donev
Zdravko Donev

Reputation: 402

Windows fc ignore output when no difference

I am using FC filename1 filename2 >> myLog.txt(where myLog.txt exists) command under Windows to compare two files. I use the command in a loop so I could compare many pairs of files.

I want to ignore the output when FC outputs:

Comparing files filename and filename2
FC: no differences encountered

Because it floods the output file with unwanted information.

How can I do this? And if possible, can I count the number of "successfull"(the one which output I ignore) compares?

I tried with FC filename1 filename2 2> myLog.txt to redirect only the error stream, but it doesn't output anything, meaning the command only outputs to the standard stream.

Upvotes: 0

Views: 2341

Answers (2)

RGuggisberg
RGuggisberg

Reputation: 4750

Easy enough to do by piping output of FC to FIND /V or FINDSTR /V. Check out the help on those commands. If you have any further questions please post your code.

Upvotes: 2

Aacini
Aacini

Reputation: 67296

You have not specified how you "use the command in a loop so I could compare many pairs of files" (how do you get the second file of each pair in the loop?), so you must modify the code below accordingly.

@echo off
setlocal

set successfull=0
(for %%a in (filename1*.txt) do (
   FC "%%a" "%%~Na2.txt" > diffs.tmp
   if errorlevel 1 (
      type diffs.tmp
   ) else (
      set /A successfull+=1
   )
)) > C:\other\folder\myLog.txt
del diffs.tmp

echo Successfull compares: %successfull%

If the myLog.txt file must grow with each run of this program, then just change the > redirection by an >> append one...

Upvotes: 2

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