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      1 #!/bin/sh
      2 
      3 usage() {
      4 	(
      5 	echo "Usage: $0 [board IP] [board port]"
      6 	echo ""
      7 	echo "If IP is not specified, 'localhost' will be used"
      8 	echo "If port is not specified, '2001' will be used"
      9 	[ -z "$*" ] && exit 0
     10 	echo ""
     11 	echo "ERROR: $*"
     12 	exit 1
     13 	) 1>&2
     14 	exit $?
     15 }
     16 
     17 while [ -n "$1" ] ; do
     18 	case $1 in
     19 		-h|--help) usage;;
     20 		--)        break;;
     21 		-*)        usage "Invalid option $1";;
     22 		*)         break;;
     23 	esac
     24 	shift
     25 done
     26 
     27 ip=${1:-localhost}
     28 port=${2:-2001}
     29 
     30 if [ -z "${ip}" ] || [ -n "$3" ] ; then
     31 	usage "Invalid number of arguments"
     32 fi
     33 
     34 trap "stty icanon echo opost intr ^C" 0 2 3 5 10 13 15
     35 echo "NOTE: the interrupt signal (normally ^C) has been remapped to ^T"
     36 
     37 stty -icanon -echo -opost intr ^T
     38 nc ${ip} ${port}
     39 exit 0
     40