#!/bin/bash

set -e
set -f
set -u
set -o pipefail

_safe_param_stdin() {
	tr -d '$`<>"%;)(&+'"'"
}

_main_server_watcher(){
	inotifywait --event close_write --format '%f' --monitor "$dir" | \
	while read -r line
	do
		# TODO: validate IP/hostname
		local target
		target="$(head -n 1 "$dir/$line" | _safe_param_stdin)"
		test -n "$target"
		xpra attach tcp://"$target":4648 &
	done
}

if [ "${SOURCED:-0}" != 1 ]; then
	readonly dir='/var/spool/doskast'
	_main_server_watcher "$@"
fi