#!/bin/sh
#
# keepitup
# This is a hacked version of "isempireup" by Dave Nye
# Modified for use with the Empire2 server by Ken Stevens 1995
#
# Usage:
# keepitup -kill <game>
# keepitup -start <game> <dir>
# keepitup -check <game> <dir> <port> <coun> <rep>
#
# Portability:
# You may need to put a '-' in front of the ps flags below

_verbose=true
tbase=/tmp/empcheck.$$

trap 'rm -f $FNAMES ; exit' 0 1 2 3 15

putmsg() {
    if [ "$_verbose" = "true" ]; then
	echo "`date` $*"
    fi
}

ERR0="Server EOF"
ERR1="connect: Connection refused"
ERR2="Expecting 2, got unix socket connect: No such file or directory"
MDOWN="The game is down"
FLAGS="-d"

killit() {
    FK=${tbase}.kill
    FNAMES="$FNAMES ${FK}.L ${FK}.P"
    rm -f ${FK}.L ${FK}.P

    ps auxw >${FK}.L
    egrep "emp_server $FLAGS $1" ${FK}.L | egrep "$USER" >${FK}.P

    SZ="`wc -l ${FK}.P | awk '{print $1}' -`"
    if [ $SZ -gt 0 ]; then
	PIDS=`awk '{rec = rec " " $2} END {print rec}' ${FK}.P`
	putmsg "Found pids $PIDS to kill for emp_server $FLAGS"
	kill $PIDS
    fi
    rm -f ${FK}.L ${FK}.P
}

kill9it() {
    PROC=$1

    FK=${tbase}.kill
    FNAMES="$FNAMES ${FK}.L ${FK}.P"
    rm -f ${FK}.L ${FK}.P

    ps auxw >${FK}.L
    egrep "$PROC" ${FK}.L | egrep "$USER" >${FK}.P

    SZ="`wc -l ${FK}.P | awk '{print $1}' -`"
    if [ $SZ -gt 0 ]; then
	PIDS=`awk '{rec = rec " " $2} END {print rec}' ${FK}.P`
	putmsg "Found pids " $PIDS " to kill for" $PROC
	kill -9 $PIDS
    fi
    rm -f ${FK}.L ${FK}.P
}

restartgame() {
    DIR=$1
    UNIQ=$2

    killit $UNIQ
    sleep 1
    cd $DIR/bin
    ./emp_server $FLAGS $UNIQ &
    echo "restarted $UNIQ"
    cd $HOME
}

checkgame() {
    DIR=$1
    PORT=$2
    COUN=$3
    PASS=$4

    EMPIREHOST=`/bin/hostname`
    EMPIREPORT=$PORT
    COUNTRY=$COUN
    PLAYER=$PASS
    export EMPIREHOST EMPIREPORT COUNTRY PLAYER

    FN=${tbase}.client
    rm -f ${FN}.I  ${FN}.1 ${FN}.2
    FNAMES="$FNAMES ${FN}.I ${FN}.1 ${FN}.2"
    echo "quit" >${FN}.I
    echo "quit" >${FN}.I

    kill9it emp_client
    $DIR/bin/emp_client >${FN}.1 2>${FN}.2  <${FN}.I
    STAT=$?
    ER=`head -1 ${FN}.2`
    NORM=`head -1 ${FN}.1`

    if [ "$STAT" = "0" ]; then
	ALLOK=true
#	putmsg "All Ok"
    elif [ "$ER" = "$ERR0" ]; then
	ALLOK=true
#	putmsg "All Ok, but bad return status"
    elif [ "$ER" = "$ERR1" ]; then
	ALLOK=false
	putmsg "emp_server is down"
    elif [ "$ER" = "$ERR2" ]; then
	ALLOK=false
	putmsg "emp_server is down"
    else
	ALLOK=false
	putmsg "Something is wrong"
    fi
    rm -f ${FN}.I  ${FN}.1 ${FN}.2
}

while [ $# -gt 0 ]; do
    case "$1" in
	# -kill game
	"-kill") shift
	    if [ $# -lt 1 ]; then
		echo "Expecting -kill <game>"
		exit 1
	    fi
	    killit $1
	    shift ;;
	# -start game dir
	"-start") shift
	    if [ $# -lt 2 ]; then
		echo "Expecting -start <game> <dir>"
		exit 1
	    fi
	    restartgame $2 $1
	    shift ;shift;;
	# -check game dir port country user
	"-check") shift
	    if [ $# -lt 5 ]; then
		echo "Expecting -check <game> <dir> <port> <tcoun> <tuser>"
		exit 1
	    fi
	    checkgame $2 $3 $4 $5
	    if [ "$ALLOK" != "true" ]; then
		restartgame $2 $1
	    fi
	    shift ; shift ; shift ; shift ; shift ;;
	*) echo "Unknown parameter found in: $*."
	    echo "Aborting."
	    exit 1 ;;
    esac
done