bash argument parsing example

args.sh

#!/bin/bash
UNCONSUMED=()
while [[ $# > 0 ]]
do
    key="$1"
    case $key in
        -l|--lib)
           LIBPATH="$2"
           shift # past argument
           ;;
        *)
            UNCONSUMED+=("$key")
            ;;
    esac
    shift # past argument or value
done
set -- ${UNCONSUMED[@]}  # UNCONSUMED becomes our new $@

Doesn't appear to handle positional arguments with spaces. args.sh "a b" will end up having $1 set to "a" and $2 set to "b".