#!/bin/sh

# template.sh: A template for sh scripts
#
# Usage: template.sh [-ac] [-b OPTARG] FILE...

usageMessage="Usage: ${0} [-ac] [-b OPTARG] FILE..."

error() {
	printf '%s error: %s\n' "$0" "$*" >&2
}

errorAndUsage() {
	printf '%s error: %s\n%s\n' "$0" "$*" "$usageMessage" >&2
}

# Process options
while getopts ':ab:c' opt; do
	case $opt in

		'a' )
			echo a
			;;

		'b' )
			echo b "$OPTARG"
			;;

		'c' )
			echo c
			;;

		'?' )
			printf '%s\n' "$usageMessage"
			exit 1

	esac
done
shift $((OPTIND - 1))