#!/bin/bash

extract_targz() { tar -xzvf "$1" }
extract_tarbz() { tar -xjvf "$1" }
extract_tarxz() { tar -xJvf "$1" }
extract_rar() { unrar x "$1" }
extract_zip() { unzip "$1" }

extractfile() {
    case "$1" in
        *.tar.gz|*.tgz)
            extract_targz "$1"
            ;;
        *.tar.bz)
            extract_tarbz "$1"
            ;;
        *.tar.xz)
            extract_tarxz "$1"
            ;;
        *.rar)
            extract_rar "$1"
            ;;
        *.zip)
            extract_zip "$1"
            ;;
    esac
}

for file in $@; do
    extractfile "$file";
done