Comapring files with md5 Checksums in Midnight Commander

I wrote a few scripts for Midnight Commander to easily compare multiple copies of a directory via checksums.  There are a few variations listed below along with a bash script that does the same thing.

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First off is this simple bash script that can be used stand alone but is also required for the MC menu entries. 

/usr/local/bin/md5compare

#!/usr/local/bin/bash
echo -n "Comparing $1 to $2: "
if [ ! -e "$1" ] || [ ! -e "$2" ]
then
 echo File Missing
 exit 1; 
fi

if [ $(md5 -q "$1") = $(md5 -q "$2") ]
then
 echo Files Match
 exit 0;
else
 echo Files Different
 exit 1;
fi

You may need to tweak the bash and script paths for your installation. Also remember to make it executable.

sudo chmod +x /usr/local/bin/md5compare

To execute this command directly just run the following.

md5compare file1 file2

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Next up are two comparison scripts that can be added MC's user menu.  To do this append them to the mc.menu file in your system /etc or users ~/.mc/menu.

This script will compare the currently highlighted file with one of the same name in the other panel.

+ t n
w       Compare files via MD5 checksum
        /usr/local/bin/md5compare %f %D/%f
        echo Press any key to continue
        read key

This script on the other hand will compare all tagged files to any matching files in the other panel.

+ t t
W       Compare tagged files via MD5 checksum
        for i in %t
        do 
          /usr/local/bin/md5compare "$i" %D/"$i"
        done
        echo Press any key to continue
        read key

Finally here is a menu item to simply dispaly the checksum of the selected file.

+ t n
s       Calculate MD5 checksum
        echo Calculating checksum of %f
        md5 -q %f
        echo Press any key to continue
        read key