#!/bin/sh

if [ -e $1 ] ; then
    case $2 in
        7z)     7z a -t7z -m0=lzma -mx=9 -mfb=64 -md=32m -ms=on $1.7z ;;
        *)      echo "don't know how to compress '$1' in '$2'..." ;;
    esac
else
    echo "'$1' is not a valid file or directory!"
fi