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#!/bin/bash
#
# -------------------------------------------------------------------------
#   Copyright (c) 2018 AT&T Intellectual Property
#
#   Licensed under the Apache License, Version 2.0 (the "License");
#   you may not use this file except in compliance with the License.
#   You may obtain a copy of the License at
#
#       http://www.apache.org/licenses/LICENSE-2.0
#
#   Unless required by applicable law or agreed to in writing, software
#   distributed under the License is distributed on an "AS IS" BASIS,
#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#   See the License for the specific language governing permissions and
#   limitations under the License.
#
# -------------------------------------------------------------------------
#

if [[ $# -ne 2 ]]; then
	echo "Usage: wait-for-port hostname port" >&2
	exit 1
fi

host=$1
port=$2

echo "Waiting for $host port $port open"
until telnet $host $port </dev/null 2>/dev/null | grep -q '^Connected'; do
	sleep 1
done

echo "$host port $port is open"

exit 0