How can I print a message when a diff shows files match?

fpp666 · 07-16-2009, 07:38 AM

Hello all!

I'm writing a script using ksh that diffs two dirs that contain about 30 files, and writing the results on a logfile.

When files differ, it writes the difference with no problem, but I also need the script to write a message if no differences are found.

Thanks for the help!

PMP · 07-16-2009, 07:42 AM

How are you taking the difference of the file please post the code snippet?? are you using diff -r to do so or you are comparing it one by one?

fpp666 · 07-16-2009, 07:57 AM

Sorry I didn't post the code. It's a simple diff between two dirs, using a FOR sentence, because only the files that start with VFR in the first dir (dir_old) are on the second one (dir_firstSet)

Code:

cd $dir_old
echo 'first set comparison ###############################' >> logfile

for name in VFR*
	do
		echo "$dir_old$name" >> logfile
		diff "$name" "$dir_firstSet$name" >> logfile
	done

Thanks!

PMP · 07-16-2009, 08:19 AM

Code:

cd $dir_old
echo 'first set comparison ###############################' >> logfile

for name in VFR*
	do
		echo "$dir_old$name" >> logfile
		difference=`diff "$name" "$dir_firstSet$name"`
                if [ $difference ]
                then
                    echo $difference >> logfile
                else
                    echo "No difference in $name $dir_firstSet$name" >> logfile
                fi
	done