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#!/bin/bash
# Copyright 2017 Robert Gustafsson
# Copyright 2017 Robin Krahl
# Copyright 2017 Andreas Lindhé
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
if [ $# -ne 2 ]
then
echo "Starts Bro with the given arguments in the background and, when"
echo "it’s ready, starts Midbro."
echo
echo "Usage: $0 INTERFACE SCRIPT"
echo "Example: $0 lo modbus.bro"
exit
fi
INTERFACE=$1
SCRIPT=$(realpath $2)
BRODIR=$(realpath "$(dirname "$0")/../..")
BROLOG=$(realpath bro.log)
MIDBRO=${BRODIR}/bin/midbro
MIDBROLOG=$(realpath midbro.log)
TMPDIR=$(mktemp --directory --tmpdir midbro.XXXX)
echo "* Starting Bro in background ..."
cd "${TMPDIR}" && sudo bro -i "${INTERFACE}" "${SCRIPT}" > ${BROLOG} 2>&1 &
BROPID=$!
echo "* Waiting for Bro to listen ..."
sleep 1
tail -f ${BROLOG} | while read LOGLINE
do
[[ "${LOGLINE}" == "listening on "* ]] && pkill -P $$ tail
done
echo "* Starting Midbro ..."
${MIDBRO}
kill $BROPID
rm -r "${TMPDIR}"
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