#!/bin/sh

wait_for_file()
{
	local dir=$1
	local file=$2
	until [ -e "$dir/$file" ]
	do
		filename=$(inotifywait -q -e create $dir | cut -d' ' -f 3)
		if [ "$filename" = "$file" ] ; then
			break;
		fi
	done

}

command -v inotifywait >/dev/null 2>&1 || \
{
	echo >&2 "Command 'inotifywait' missing.";
	echo >&2 "Try 'apt-get install inotify-tools' to install.";
	exit 1;
}

wait_for_file "/dev" "serial"
wait_for_file "/dev/serial" "by-id"

while true;
do
	for f in "/dev/serial/by-id/usb-secunet_HW.DbC"*; do
		if [ -e "$f" ] ; then
			cat "$f"
			break 2;
		else
			inotifywait -qe create /dev/serial/by-id 2>&1
		fi
		break;
	done
done

exit 0