#!/bin/sh

function main
{
  local dest=.

  while getopts 'd:' OPT
  do
    case $OPT in
      'd') dest="$OPTARG" ;;
    esac
  done

  shift $(expr $OPTIND - 1)

  for file in "$@"
  do
    if [ -f "$file" ]
    then
      case "$file" in
        *.tar.bz2)  tar xvfj "$file" -C "$dest/" ;;
        *.tar.gz)   tar xvfz "$file" -C "$dest/" ;;
        *.tar.lzma) tar xvfa "$file" -C "$dest/" ;;
        *.tar.xz)   tar xvfJ "$file" -C "$dest/" ;;
        *.tar)      tar xvf "$file" -C "$dest/" ;;
        *.tbz)      tar xvfj "$file" -C "$dest/" ;;
        *.tgz)      tar xvfz "$file" -C "$dest/" ;;
        *.tlz)      tar xvfa "$file" -C "$dest/" ;;
        *.txz)      tar xvfJ "$file" -C "$dest/" ;;
        *.7z)       7z x "$file" -o"$dest/$(basename $file .7z)/" ;;
        *.bz2)      bunzip2 "$file" ;;
        *.cab)      cabextract -d "$dest/$(basename "$file" .cab)/" "$file" ;;
        *.deb)      ar x "$file" ;;
        *.gz)       gunzip "$file" ;;
        *.lha)      lha xw="$dest/$(basename "$file" .lha)/" "$file" ;;
        *.lzma)     lzma "$file" ;;
        *.rar)      unrar x "$file" "$dest/$(basename "$file" .rar)/" ;;
        *.xz)       xz "$file" ;;
        *.zip)      unzip "$file" -d "$dest/$(basename "$file" .zip)/" ;;
        *)          echo "'$file' cannot be extracted with extract." 1>&2 ;;
      esac
    else
      echo "'$file' is not a valid file." 1>&2
    fi
  done
}

main "$@"