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#!/bin/bash
#
# ============LICENSE_START=======================================================
# Copyright (C) 2019 Nordix Foundation.
# ================================================================================
# 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.
#
# SPDX-License-Identifier: Apache-2.0
# ============LICENSE_END=========================================================
#
# @author Waqas Ikram (waqas.ikram@est.tech)
SCRIPT_NAME=$(basename $0)
# Process the arguments passed to the script
usage()
{
_msg_="$@"
cat<<-EOF
Command Arguments:
-t, --timeout
Mandatory argument. time out value in seconds (must be number)
-h --host
Mandatory argument. Host name or IP
-p, --port
Mandatory argument. Port of the host
--help
Optional argument. Display this usage.
EOF
exit 1
}
current_timestamp()
{
date +"%Y-%m-%d %H:%M:%S"
}
# Called when script is executed with invalid arguments
invalid_arguments()
{
echo "Missing or invalid option(s):"
echo "$@"
echo "Try --help for more information"
exit 1
}
process_arguments()
{
SHORT_ARGS="t:h:p:"
LONG_ARGS="help,timeout:,host:,port:"
args=$(getopt -o $SHORT_ARGS -l $LONG_ARGS -n "$0" -- "$@" 2>&1 )
[[ $? -ne 0 ]] && invalid_arguments $( echo " $args"| head -1 )
[[ $# -eq 0 ]] && invalid_arguments "No options provided"
eval set -- "$args"
cmd_arg="$0"
while true; do
case "$1" in
-t|--timeout)
TIME_OUT=$2
shift 2 ;;
-h|--host)
HOST=$2
shift 2 ;;
-p|--port)
PORT=$2
shift 2 ;;
--help)
usage
exit 0
;;
--)
shift
break ;;
*)
echo BAD ARGUMENTS # perhaps error
break ;;
esac
done
regex='^[0-9]+$'
if ! [[ $TIME_OUT =~ $regex ]] ; then
echo "$SCRIPT_NAME $(current_timestamp): error: TIME_OUT must be number $TIME_OUT" >&2; exit 1
fi
if [ -z "$HOST" ]; then
echo "$SCRIPT_NAME $(current_timestamp): error: HOST must not be empty! $HOST" >&2; exit 1
fi
if ! [[ $PORT =~ $regex ]]; then
echo "$SCRIPT_NAME $(current_timestamp): error: PORT must be number! $PORT" >&2; exit 1
fi
SLEEP_TIME=5
START_TIME_IN_SECONDS=`date +%s`
TIME_OUT_END_TIME_IN_SECONDS=$(($START_TIME_IN_SECONDS+$TIME_OUT));
while [ `date +%s` -lt "$TIME_OUT_END_TIME_IN_SECONDS" ]; do
echo "$(current_timestamp): Waiting for $HOST:$PORT to startup ..."
nc -z "$HOST" "$PORT" > /dev/null 2>&1
result=$?
if [ $result -eq 0 ] ; then
echo "$SCRIPT_NAME $(current_timestamp): $HOST:$PORT is up and running"
break;
fi
echo "$SCRIPT_NAME $(current_timestamp): Sleeping for ${SLEEP_TIME} seconds"
sleep ${SLEEP_TIME}
done
if [ $result -ne 0 ]; then
echo "$SCRIPT_NAME $(current_timestamp): Time out: could not get any response from $HOST:$PORT . . ."
exit 1
fi
echo "$SCRIPT_NAME $(current_timestamp): finished successfully"
}
# main body
process_arguments $@
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