#!/bin/sh usage() { ( echo "Usage: $0 <board IP> [board port]" echo "" echo "If port is not specified, '6666' will be used" [ -z "$*" ] && exit 0 echo "" echo "ERROR: $*" exit 1 ) 1>&2 exit $? } while [ -n "$1" ] ; do case $1 in -h|--help) usage;; --) break;; -*) usage "Invalid option $1";; *) break;; esac shift done ip=$1 port=${2:-6666} if [ -z "${ip}" ] || [ -n "$3" ] ; then usage "Invalid number of arguments" fi for nc in netcat nc ; do type ${nc} >/dev/null && break done trap "stty icanon echo intr ^C" 0 2 3 5 10 13 15 echo "NOTE: the interrupt signal (normally ^C) has been remapped to ^T" stty -icanon -echo intr ^T ${nc} -u -l -p ${port} < /dev/null & exec ${nc} -u ${ip} ${port}