209 lines
6.5 KiB
Bash
209 lines
6.5 KiB
Bash
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#!/usr/bin/env bash
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#source https://github.com/vishnubob/wait-for-it/pull/81
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#The MIT License (MIT)
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#
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#Original work Copyright (c) 2016 Giles Hall: wait-for-it.sh
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#Modified work Copyright (c) 2019 iturgeon: wait-for-it.sh
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#
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#Permission is hereby granted, free of charge, to any person obtaining a copy of
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#this software and associated documentation files (the "Software"), to deal in
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#the Software without restriction, including without limitation the rights to
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#use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
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#of the Software, and to permit persons to whom the Software is furnished to do
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#so, subject to the following conditions:
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#
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#The above copyright notice and this permission notice shall be included in all
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#copies or substantial portions of the Software.
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#
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#THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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#IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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#FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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#AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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#LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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#OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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#SOFTWARE.
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# Use this script to test if a given TCP host/port are available
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WAITFORIT_cmdname=${0##*/}
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echoerr() { if [[ $WAITFORIT_QUIET -ne 1 ]]; then echo "$@" 1>&2; fi }
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usage()
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{
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cat << USAGE >&2
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Usage:
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$WAITFORIT_cmdname host:port [-s] [-t timeout] [-- command args]
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-h HOST | --host=HOST Host or IP under test
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-p PORT | --port=PORT TCP port under test
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Alternatively, you specify the host and port as host:port
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-s | --strict Only execute subcommand if the test succeeds
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-q | --quiet Don't output any status messages
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-t TIMEOUT | --timeout=TIMEOUT
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Timeout in seconds, zero for no timeout
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-- COMMAND ARGS Execute command with args after the test finishes
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USAGE
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exit 1
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}
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wait_for()
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{
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if [[ $WAITFORIT_TIMEOUT -gt 0 ]]; then
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echoerr "$WAITFORIT_cmdname: waiting $WAITFORIT_TIMEOUT seconds for $WAITFORIT_HOST:$WAITFORIT_PORT"
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else
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echoerr "$WAITFORIT_cmdname: waiting for $WAITFORIT_HOST:$WAITFORIT_PORT without a timeout"
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fi
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WAITFORIT_start_ts=$(date +%s)
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while :
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do
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if [[ $WAITFORIT_ISBUSY -eq 1 ]]; then
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nc -z $WAITFORIT_HOST $WAITFORIT_PORT
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WAITFORIT_result=$?
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else
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(echo > /dev/tcp/$WAITFORIT_HOST/$WAITFORIT_PORT) >/dev/null 2>&1
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WAITFORIT_result=$?
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fi
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if [[ $WAITFORIT_result -eq 0 ]]; then
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WAITFORIT_end_ts=$(date +%s)
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echoerr "$WAITFORIT_cmdname: $WAITFORIT_HOST:$WAITFORIT_PORT is available after $((WAITFORIT_end_ts - WAITFORIT_start_ts)) seconds"
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break
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fi
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sleep 1
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done
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return $WAITFORIT_result
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}
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wait_for_wrapper()
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{
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# In order to support SIGINT during timeout: http://unix.stackexchange.com/a/57692
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if [[ $WAITFORIT_QUIET -eq 1 ]]; then
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timeout $WAITFORIT_BUSYTIMEFLAG $WAITFORIT_TIMEOUT $0 --quiet --child --host=$WAITFORIT_HOST --port=$WAITFORIT_PORT --timeout=$WAITFORIT_TIMEOUT &
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else
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timeout $WAITFORIT_BUSYTIMEFLAG $WAITFORIT_TIMEOUT $0 --child --host=$WAITFORIT_HOST --port=$WAITFORIT_PORT --timeout=$WAITFORIT_TIMEOUT &
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fi
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WAITFORIT_PID=$!
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trap "kill -INT -$WAITFORIT_PID" INT
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wait $WAITFORIT_PID
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WAITFORIT_RESULT=$?
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if [[ $WAITFORIT_RESULT -ne 0 ]]; then
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echoerr "$WAITFORIT_cmdname: timeout occurred after waiting $WAITFORIT_TIMEOUT seconds for $WAITFORIT_HOST:$WAITFORIT_PORT"
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fi
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return $WAITFORIT_RESULT
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}
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# process arguments
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while [[ $# -gt 0 ]]
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do
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case "$1" in
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*:* )
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WAITFORIT_hostport=(${1//:/ })
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WAITFORIT_HOST=${WAITFORIT_hostport[0]}
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WAITFORIT_PORT=${WAITFORIT_hostport[1]}
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shift 1
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;;
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--child)
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WAITFORIT_CHILD=1
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shift 1
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;;
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-q | --quiet)
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WAITFORIT_QUIET=1
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shift 1
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;;
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-s | --strict)
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WAITFORIT_STRICT=1
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shift 1
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;;
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-h)
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WAITFORIT_HOST="$2"
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if [[ $WAITFORIT_HOST == "" ]]; then break; fi
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shift 2
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;;
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--host=*)
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WAITFORIT_HOST="${1#*=}"
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shift 1
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;;
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-p)
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WAITFORIT_PORT="$2"
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if [[ $WAITFORIT_PORT == "" ]]; then break; fi
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shift 2
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;;
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--port=*)
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WAITFORIT_PORT="${1#*=}"
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shift 1
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;;
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-t)
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WAITFORIT_TIMEOUT="$2"
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if [[ $WAITFORIT_TIMEOUT == "" ]]; then break; fi
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shift 2
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;;
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--timeout=*)
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WAITFORIT_TIMEOUT="${1#*=}"
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shift 1
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;;
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--)
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shift
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WAITFORIT_CLI=("$@")
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break
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;;
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--help)
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usage
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;;
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*)
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echoerr "Unknown argument: $1"
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usage
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;;
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esac
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done
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if [[ "$WAITFORIT_HOST" == "" || "$WAITFORIT_PORT" == "" ]]; then
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echoerr "Error: you need to provide a host and port to test."
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usage
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fi
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WAITFORIT_TIMEOUT=${WAITFORIT_TIMEOUT:-15}
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WAITFORIT_STRICT=${WAITFORIT_STRICT:-0}
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WAITFORIT_CHILD=${WAITFORIT_CHILD:-0}
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WAITFORIT_QUIET=${WAITFORIT_QUIET:-0}
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WAITFORIT_ISBUSY=0
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WAITFORIT_BUSYTIMEFLAG=""
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WAITFORIT_TIMEOUT_PATH=$(type -p timeout)
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WAITFORIT_TIMEOUT_PATH=$(realpath $WAITFORIT_TIMEOUT_PATH 2>/dev/null || readlink -f $WAITFORIT_TIMEOUT_PATH)
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# check to see if we're using busybox?
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if [[ $WAITFORIT_TIMEOUT_PATH =~ "busybox" ]]; then
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WAITFORIT_ISBUSY=1
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fi
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# see if timeout.c args have been updated in busybox v1.30.0 or newer
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# note: this requires the use of bash on Alpine
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if [[ $WAITFORIT_ISBUSY && $(busybox | head -1) =~ ^.*v([[:digit:]]+)\.([[:digit:]]+)\..+$ ]]; then
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if [[ ${BASH_REMATCH[1]} -le 1 && ${BASH_REMATCH[2]} -lt 30 ]]; then
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# using pre 1.30.0 version with `-t SEC` arg
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WAITFORIT_BUSYTIMEFLAG="-t"
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fi
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fi
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if [[ $WAITFORIT_CHILD -gt 0 ]]; then
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wait_for
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WAITFORIT_RESULT=$?
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exit $WAITFORIT_RESULT
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else
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if [[ $WAITFORIT_TIMEOUT -gt 0 ]]; then
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wait_for_wrapper
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WAITFORIT_RESULT=$?
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else
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wait_for
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WAITFORIT_RESULT=$?
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fi
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fi
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if [[ $WAITFORIT_CLI != "" ]]; then
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if [[ $WAITFORIT_RESULT -ne 0 && $WAITFORIT_STRICT -eq 1 ]]; then
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echoerr "$WAITFORIT_cmdname: strict mode, refusing to execute subprocess"
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exit $WAITFORIT_RESULT
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fi
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exec "${WAITFORIT_CLI[@]}"
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else
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exit $WAITFORIT_RESULT
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fi
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