#!/bin/sh

# fgfs-launch-clinets -- script to launch fgfs scenery construction clients
#
# 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.
#
# $Id$

CLIENT=fgfs-tools-client
HOSTNAME=`uname -n`

# check usage
if [ $# != 1 ]; then
    echo "Usage: $0 base_dir"
    exit
else
    BASE_DIR=$1
    CLIENT_LIST_RUDE="${BASE_DIR}/clients.rude"
    CLIENT_LIST_NICE="${BASE_DIR}/clients.nice"
    WORK_BASE="${BASE_DIR}/work"
    OUTPUT_DIR="${BASE_DIR}/FlightGear"
    LOG_DIR="${BASE_DIR}/work.status"
    SERVER_LOG_FILE=${LOG_DIR}/server.log
    echo "Base directory is $BASE_DIR"
    echo "Client list files are $CLIENT_LIST_RUDE $CLIENT_LIST_NICE"
    echo "Work base is $WORK_BASE"
    echo "Output base is $OUTPUT_DIR"
    echo "Logging to $LOG_FILE"
fi

SERVER_HOST=`grep "Server launched" $SERVER_LOG_FILE | awk '{ print $5 }'`
if [ "x$SERVER_HOST" = "x" ]; then
    echo "Can't find server host name in $SERVER_LOG_FILE"
    exit
else
    echo "Server hostname is $SERVER_HOST"
fi

SERVER_PORT=`grep port $SERVER_LOG_FILE | awk '{ print $7 }'`
if [ "x$SERVER_PORT" = "x" ]; then
    echo "Can't find server port number in $SERVER_LOG_FILE"
    exit
else
    echo "Server port number is $SERVER_PORT"
fi

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

# read client lists
if [ -f $CLIENT_LIST_RUDE ]; then
    TMP=`cat $CLIENT_LIST_RUDE`
    CLIENTS_RUDE=`echo $TMP`
fi
if [ -f $CLIENT_LIST_NICE ]; then
    TMP=`cat $CLIENT_LIST_NICE`
    CLIENTS_NICE=`echo $TMP`
fi
echo "Rude clients = $CLIENTS_RUDE"
echo "Nice clients = $CLIENTS_NICE"

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

# launch a copy of the client process on each specified machine

for i in $CLIENTS_RUDE; do
    if ping -c 1 -i 5 $i > /dev/null; then
	echo "Launching client process on $i"
    else
	echo "client $i is currently down, skipping"
	continue
    fi

    LOG_FILE="${LOG_DIR}/client-$i.log"

    # KILL_COMMAND="killall $CLIENT"
    # ssh -n $i "$KILL_COMMAND"

    RMT_COMMAND="source ~/.profile; nice $CLIENT $SERVER_HOST $SERVER_PORT $WORK_BASE $OUTPUT_DIR -r"
    echo "client command:"
    echo ""
    echo "$RMT_COMMAND"
    echo ""
    ssh -n $i "$RMT_COMMAND > $LOG_FILE 2>&1 &"
done

for i in $CLIENTS_NICE; do
    if ping -c 1 -i 5 $i > /dev/null; then
	echo "Launching client process on $i"
    else
	echo "client $i is currently down, skipping"
	continue
    fi

    LOG_FILE="${LOG_DIR}/client-$i.log"

    # KILL_COMMAND="killall $CLIENT"
    # ssh -n $i "$KILL_COMMAND"

    RMT_COMMAND="source ~/.profile; nice $CLIENT $SERVER_HOST $SERVER_PORT $WORK_BASE $OUTPUT_DIR"
    echo "client command:"
    echo ""
    echo "$RMT_COMMAND"
    echo ""
    ssh -n $i "$RMT_COMMAND > $LOG_FILE 2>&1 &"
done