#!/bin/bash

### Check if a port is open continuously ###
# Copyright 2009 Ertug Karamatli

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.


while [ 1 ]; do
	nc -z $1 $2
	if [ $? == 0 ]; then
		echo port $2 is OPEN
	else
		echo port $2 is closed
	fi
	sleep 0.5
done