#!/bin/bash

### Serve a log realtime from a port with netcat ###
# Copyright 2009 Ertug Karamatli

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.


if [ -z "$1" ]; then
	echo Usage: $0 LOGFILE [PORT]
	exit -1
fi
if [ -n "$2" ]; then
	PORT=$2
else
	PORT=9977
fi

TAIL_CMD="tail -f $1"

function kill_tail {
	# find and kill the tail process that is detached from the current process
	TAIL_PID=$(/bin/ps -eo pid,args | grep "$TAIL_CMD" | grep -v grep | awk '{ print $1 }')
	kill $TAIL_PID
}
trap "kill_tail; exit 0" SIGINT SIGTERM

while true; do
	( $TAIL_CMD & ) | nc -l -p $PORT -vvv
	kill_tail
done