netconsole 1.18 KB
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#!/bin/sh

usage() {
	(
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	echo "Usage: $0 <board-IP> [board-port [board-in-port]]"
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	echo ""
	echo "If port is not specified, '6666' will be used"
	[ -z "$*" ] && 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=$1
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board_out_port=${2:-6666}
board_in_port=${3:-${board_out_port}}
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echo Board out port: ${board_out_port}
echo Board in port: ${board_in_port}

if [ -z "${ip}" ] || [ -n "$4" ] ; then
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	usage "Invalid number of arguments"
fi

for nc in netcat nc ; do
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	type ${nc} >/dev/null 2>&1 && break
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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
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(
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if type ncb 2>/dev/null ; then
	# see if ncb is in $PATH
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	exec ncb ${board_out_port}
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elif [ -x ${0%/*}/ncb ] ; then
	# maybe it's in the same dir as the netconsole script
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	exec ${0%/*}/ncb ${board_out_port}
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else
	# blah, just use regular netcat
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	while ${nc} -u -l -p ${board_out_port} < /dev/null ; do
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		:
	done
fi
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) &
pid=$!
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${nc} -u ${ip} ${board_in_port}
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kill ${pid} 2>/dev/null