#!/bin/sh

# fgfs-launch-server -- script to launch fgfs scenery construction server
#
# Written by Curtis Olson, started May 1999.
#
# Copyright (C) 1999  Curtis L. Olson  - curt@flightgear.org
#
# 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 2 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, write to the Free Software
# Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
#
# $Id$

SERVER=fgfs-tools-server

# check usage
if [ $# != 1 ]; then
    echo "Usage: $0 base_dir"
    exit
else
    BASE_DIR=$1
    WORK_BASE="${BASE_DIR}/work"
    OUTPUT_DIR="${BASE_DIR}/FlightGear"
    MASTER_ON="${WORK_BASE}.status/MASTER_ON"
    LOG_DIR="${BASE_DIR}/work.status"
    LOG_FILE="${LOG_DIR}/server.log"
    echo "Base directory is $BASE_DIR"
    echo "Work base is $WORK_BASE"
    echo "Output base is $OUTPUT_DIR"
    echo "Logging to $LOG_FILE"
fi

# check if server binary exists
if type $SERVER > /dev/null; then
    echo "server: `type $SERVER`"
else
    echo "cannot locate $SERVER"
    exit
fi

# check if log directory exists, and if not, make it
if [ ! -d $LOG_DIR ]; then
    mkdir -p $LOG_DIR
fi

# kill any existing copies of the server
killall $SERVER

# launch the server in the background
SERVER_HOST=`hostname -f`
COMMAND="$SERVER $WORK_BASE $OUTPUT_DIR"
echo "Launching the server with the following options:"
echo ""
echo "$COMMAND"
echo ""
echo "Server launched on host: $SERVER_HOST" > $LOG_FILE
$COMMAND >> $LOG_FILE 2>&1 &

# grab the PID
SERVER_PID=`echo $!`

# wait for a moment
sleep 1

# grab the port number
SERVER_PORT=`grep port $LOG_FILE | awk '{ print $7 }'`

# turn on the master switch
echo $SERVER_PORT > $MASTER_ON

# finish
echo "server is now running in background:"
echo "  host = $SERVER_HOST"
echo "  pid =  $SERVER_PID"
echo "  port = $SERVER_PORT"