#!/bin/sh

usage() { echo "Usage: shutdown <-p|-r>"; }

_poweroff() {
	echo 'Shutting down.'
	init_signal=USR1
}

_reboot() {
	echo 'Rebooting.'
	init_signal='INT'
}

main() {
	while [ "$1" ]; do
		case "$1" in
			-p|--poweroff) _poweroff;;
			-r|--reboot) _reboot;;

			-h|--help|--usage) usage; return;;
			*) usage; return 1
		esac
		shift
	done

	exe_name="${0##*/}"

	if [ -z "$init_signal" ]; then
		case "$exe_name" in
			poweroff) _poweroff;;
			reboot) _reboot;;

			*) usage; return 1;;
		esac
	fi

	kill -s "$init_signal" 1
}

main "$@"