3 #============LICENSE_START==================================================
5 #===========================================================================
6 # Copyright (C) 2017-2018 AT&T Intellectual Property. All rights reserved.
7 #===========================================================================
8 # Licensed under the Apache License, Version 2.0 (the "License");
9 # you may not use this file except in compliance with the License.
10 # You may obtain a copy of the License at
12 # http://www.apache.org/licenses/LICENSE-2.0
14 # Unless required by applicable law or agreed to in writing, software
15 # distributed under the License is distributed on an "AS IS" BASIS,
16 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
17 # See the License for the specific language governing permissions and
18 # limitations under the License.
19 #============LICENSE_END==================================================
23 if [[ $# -ne 2 ]]; then
24 echo "Usage: wait-for-port hostname port" >&2
31 echo "Waiting for $host port $port open"
32 until telnet $host $port </dev/null 2>/dev/null | grep -q '^Connected'; do
36 echo "$host port $port is open"