#!/bin/bash
#
# opensim_region (OpenSim Region Server) using tmux
#                                                    by Fumi.Iseki
#

PRGFL=/etc/init.d/opensim_region    # このスクリプトのフルパス
OPNSM=OpenSim.exe                   # 起動するプログラム
OSDIR=/usr/local/opensim            # OpenSim をインストールしたディレクトリを指定
MONO=/usr/local/bin/mono            # mono へのパス
SCRNID=opensim_region
PIDFL=/var/run/opensim_region_check.pid

SLEEPTM=15                          # リスタート時のスリープ時間 (s)
CHKTM=30                            # 監視間隔 (s)
CNTMX=60                            # ハングアップ監視回数．判定時間は $CNTMX * $CHKTM (s)

export PATH=/usr/local/bin:$PATH
export MONO_THREADS_PER_CPU=512


start() {
    echo "OpenSim Region Server Start."
    tmux new -d -s $SCRNID -c $OSDIR/bin "$MONO $OPTION $OPNSM"
}       


stop() {
    tmux send-keys -t $SCRNID C-m "quit" C-m 
    echo "OpenSim Region Server Stoped."
}


kill_check() {
    PID=`cat $PIDFL 2> /dev/null`
    if [ "$PID" != "" ]; then
         kill -9 $PID 2> /dev/null
         rm -f $PIDFL
    fi
}


start_check() {
    kill_check
    echo $$ >| $PIDFL
    PRVTM="0:00"
    COUNT=0
    #
    while [ "" = "" ]; do
        CHECK=`ps ax|grep tmux |grep $SCRNID`
        if [ "$CHECK" = "" ]; then
            start
            PRVTM="0:00"
            COUNT=0
        else
            CHECK=`ps ax|grep $MONO |grep $OPNSM |grep -v tmux`
            EXETM=`echo $CHECK | awk -F" " '{print $4}'`
            if [ "$PRVTM" = "$EXETM" ]; then
                COUNT=`expr $COUNT + 1`
                if [ $COUNT -ge $CNTMX ]; then
                    tmux send-keys -t $SCRNID C-m "quit" C-m 
      	            sleep $CHKTM
                    PID=`echo $CHECK | awk -F" " '{print $1}'`
                    kill -9 $PID
                else
                    tmux send-keys -t $SCRNID C-m "show stats" C-m 
                    #tmux send-keys -t $SCRNID C-m "generate map" C-m 
                fi
            else
                COUNT=0
            fi
            PRVTM=$EXETM
        fi
        #
        sleep $CHKTM
    done
}


case "$1" in
  start)
    start
    /bin/bash $PRGFL check &
    ;;
  stop)
    kill_check
    stop
    ;;
  restart|reload)
    kill_check
    stop
    sleep $SLEEPTM
    start
    /bin/bash $PRGFL check &
    ;;
  check)
    start_check
    ;;
  *)
    echo $"Usage: $0 {start|stop|restart|check}"
    exit 1
esac

exit $?