ufw-tools/ufwd

#!/usr/bin/env bash
shopt -s nullglob

# Defaults for XDG
if ! [[ "$XDG_RUNTIME_DIR" ]]; then
	XDG_RUNTIME_DIR="/run/user/$UID"
fi

# Defaults
cfg_workdir="$XDG_RUNTIME_DIR/supd"
cfg_scan_delay='30'

msg() { printf '%s\n' "$*"; }
err() { echo "$*" >&2; }

usage() { echo "No help available."; }

main() {
	while (( $# )); do
		case "$1" in
			(--help|-h) usage; return 0;;
			(--workdir|-d) cfg_workdir="$2"; shift;;
			(--scan-delay|-D) cfg_scan_delay="$2"; shift;;

			(--) shift; break;;
			(-*)
				err "Unknown key: $1"
				usage
				return 1
			;;

			(*) break;;
		esac
		shift
	done

	mkdir -p "$cfg_workdir" || {
		return 1
	}

	cd "$cfg_workdir" || {
		return 1
	}

	while sleep "$cfg_scan_delay"; do
		for i in *; do
			sup -R "$i"
		done
	done
}

main "$@"