Bash arg-parse FSM

script.sh

#!/bin/bash
# By Pytel

#DEBUG=true
DEBUG=false

VERBOSE=false

function printHelp () {
	echo -e "USE:"
	echo -e "  $(echo "$0" | tr "/" "\n" | tail -n 1) -f [atribut] COMMANDs"
	echo ""
	echo -e "COMMANDS:"
	echo -e "  -h --help \t print this text"
	echo -e "  -d --debug\t enable debug output"
	echo -e "  -v --verbose\t enable vebrose mode"
	echo -e "  -f --func\t run function"
	echo -e "  -t --time \t set spin up time"
}

$DEBUG && echo "Args: [$*]"

# input args
case $# in
	0) printHelp; exit 2;;
	*) arg=$1;;
esac

# parse input
while [ $# -gt 0 ] ; do
	$DEBUG && echo "Arg: $arg remain: $#"

	# vyhodnoceni
	case $arg in
		-h | --help) 	printHelp; exit 2;;
		-d | --debug)	DEBUG=true;;
		-v | --verbose)	VERBOSE=true;;
		-f | --func)	shift; runFunc "$1" || exit 3;;
		-t | --time)	shift; setTime "$1" || exit 4;;
		*) echo -e "Unknown parametr: $arg"; exit 1;;
	esac

	# next arg
	shift
	arg=$1
done