#!/bin/sh usage() { ( echo "Usage: $0 <board-IP> [board-port [board-in-port]]" echo "" echo "If port is not specified, '6666' will be used" [ -z "$*" ] && 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=$1 board_out_port=${2:-6666} board_in_port=${3:-${board_out_port}} echo Board out port: ${board_out_port} echo Board in port: ${board_in_port} if [ -z "${ip}" ] || [ -n "$4" ] ; then usage "Invalid number of arguments" fi for nc in netcat nc ; do type ${nc} >/dev/null 2>&1 && 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 ( if type ncb 2>/dev/null ; then # see if ncb is in $PATH exec ncb ${board_out_port} elif [ -x ${0%/*}/ncb ] ; then # maybe it's in the same dir as the netconsole script exec ${0%/*}/ncb ${board_out_port} else # blah, just use regular netcat while ${nc} -u -l -p ${board_out_port} < /dev/null ; do : done fi ) & pid=$! ${nc} -u ${ip} ${board_in_port} kill ${pid} 2>/dev/null