Script to verify GameCube ISOs using redump.org

#!/bin/sh

echo "Please wait, this may take a while..."
for file in ./*.iso
do
    gameId=$(head -c 4 "$file") # Game ID is an ascii string stored in the first six bytes of the header
    gameSha1=$(sha1sum "$file") # Calculate SHA1 checksum for the file (would use CRC32 but that needs an extra program to be installed while sha1sum is installed by default)
    redumpData=$(wget -qO- "http://redump.org/discs/quicksearch/$gameId") # Get redump.org entry for this game

    case $redumpData in
        *"$gameId"*)
                echo "$file (Game ID: $gameId): Found matching checksum in redump database, this dump should be OK!"
        ;;
    esac
done