-#!/bin/bash
+#!/bin/sh
-if [[ $# -ne 2 ]]; then
- echo "Usage: wait-for-port hostname port" >&2
- exit 1
+tmout=120
+cmd=
+while getopts c:t: opt; do
+ case "$opt" in
+ c) cmd="$OPTARG" ;;
+ t) tmout="$OPTARG" ;;
+ esac
+done
+nargs=$(expr $OPTIND - 1)
+shift $nargs
+
+even_args=$(expr $# % 2)
+if [ $# -lt 2 -o $even_args -ne 0 ]; then
+ echo "args: [-t timeout] [-c command] hostname1 port1 hostname2 port2 ..." >&2
+ exit 1
fi
-host=$1
-port=$2
+while [ $# -ge 2 ]; do
+ export host=$1
+ export port=$2
+ shift
+ shift
+
+ echo "Waiting for $host port $port..."
+ timeout $tmout sh -c 'until nc -vz "$host" "$port"; do echo -n ".";
+ sleep 1; done'
+ rc=$?
-echo "Waiting for $host port $port open"
-until telnet $host $port </dev/null 2>/dev/null | grep -q '^Connected'; do
- sleep 1
+ if [ $rc != 0 ]; then
+ echo "$host port $port cannot be reached"
+ exit $rc
+ fi
done
-echo "$host port $port is open"
+$cmd
exit 0