+tmout=120
+cmd=
+
+while getopts c:t: opt; do
+ case "$opt" in
+ c) cmd="$OPTARG" ;;
+ t) tmout="$OPTARG" ;;
+ esac
+done
+let nargs=$OPTIND-1
+shift $nargs
+
+let even_args=$#%2
+if [[ $# -lt 2 || $even_args -ne 0 ]]; then
+ echo "args: [-t timeout] [-c command] hostname1 port1 hostname2 port2 ..." >&2