2 # ============LICENSE_START====================================================
3 # Copyright (C) 2021 AT&T Intellectual Property. All rights reserved.
4 # =============================================================================
5 # Licensed under the Apache License, Version 2.0 (the "License");
6 # you may not use this file except in compliance with the License.
7 # You may obtain a copy of the License at
9 # http://www.apache.org/licenses/LICENSE-2.0
11 # Unless required by applicable law or agreed to in writing, software
12 # distributed under the License is distributed on an "AS IS" BASIS,
13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 # See the License for the specific language governing permissions and
15 # limitations under the License.
17 # SPDX-License-Identifier: Apache-2.0
18 # ============LICENSE_END======================================================
22 while getopts c:t: opt; do
28 nargs=$(expr $OPTIND - 1)
31 even_args=$(expr $# % 2)
32 if [ $# -lt 2 -o $even_args -ne 0 ]; then
33 echo "args: [-t timeout] [-c command] hostname1 port1 hostname2 port2 ..." >&2
37 while [ $# -ge 2 ]; do
43 echo "Waiting for $host port $port..."
44 timeout $tmout sh -c 'until nc -vz "$host" "$port"; do echo -n ".";
49 echo "$host port $port cannot be reached"