#!/bin/bash

# $Id$

if [ -z $GNUSTEP_SYSTEM_ROOT ]; then
  source $HOME/SkyrixRoot/Makefiles/GNUstep.sh
  echo "Using GNUstep: ${GNUSTEP_SYSTEM_ROOT}"
fi

DAEMON="skymasterd"

LSOF='/usr/sbin/lsof'

if [ ! -e $LSOF ] 
  then
    LSOF='/usr/bin/lsof'

    if [ ! -e $LSOF ]
      then
        LSOF=`which lsof`

        if [ -z $LSOF ]
          then
            echo -n "No lsof found, neither in /usr/bin nor in /usr/sbin or "
            echo "your path."
            exit 1
        fi
    fi
fi

setURL () {
  URL=""
  PORT=`$LSOF -Pi | grep skymaster | grep LISTEN | awk '{print $8}' -`
  if [ -z "$PORT" ]
  then
      return
  fi

  sub=`expr substr $PORT 1 9`
  if [ "x$sub" = "xlocalhost" ]
    then
      PORT=`echo $PORT | sed s/*:// -`
      URL="http://$PORT/RPC2"
    else
      URL="http://localhost:$PORT/RPC2"
  fi
}

PIDFILE="$GNUSTEP_USER_ROOT/run/$DAEMON.pid"

PREFIX=`Defaults read NSGlobalDomain SxDefaultNamespacePrefix`
NAMESPACE="$PREFIX.master"
LOGDIR="$GNUSTEP_USER_ROOT/logs"
LOGFILE="$LOGDIR/skymasterd.log"

STARTUSER="skyrix42"

CHECK=10
CHECKINTERVAL=1

startDaemon () {
  if [ ! -d $LOGDIR ]
  then
   if [ $USER == "root" ]
   then
     su - $STARTUSER "mkdir $LOGDIR"
   else
     sh -c "mkdir $LOGDIR"
   fi
  fi

  printf "%-50s" "Starting service $DAEMON"      
  if [ -f $PIDFILE ]
  then
    PID=`cat $PIDFILE`
    PROCPATH="/proc/$PID/environ"
    if [ -e $PROCPATH ]
    then
      echo "$DAEMON (pid $PID) already running"
      exit
    fi
  fi
  if [ $USER == "root" ]
  then
    su - $STARTUSER "nohup $DAEMON 1>>$LOGFILE 2>&1 &"
  else
    sh -c "nohup $DAEMON 1>>$LOGFILE 2>&1 &"
  fi
  COUNTER=0
  for (( ; $COUNTER < $CHECK ; COUNTER = $COUNTER + 1 )) ;
    do
      WAIT=0
      for (( ; $WAIT < 5 ; WAIT = $WAIT + 1 ));
      do
        echo -n "."
        sleep 1
        setURL
        if [ -n "$URL" ]
          then
            break
            echo 'breaking'
        fi
      done
      echo -n "."
    
      STATUS=`sh -c "xmlrpc_call $URL $NAMESPACE.status"`
      if [ $? -eq 0 ]
        then
          if [ "x$STATUS" = "xrunning" ]
            then
              echo "OK"
              exit
          fi ;
      fi
     sleep $CHECKINTERVAL
  done
  echo "FAILED"
}

stopDaemon () {
  printf "%-50s" "Stopping service $DAEMON"
  if [ -f $PIDFILE ]
  then
    PID=`cat $PIDFILE`
    /bin/kill -INT $PID
    COUNTER=0
    for (( ; $COUNTER < $CHECK ; COUNTER = $COUNTER + 1 )) ;
    do
      echo -n "."
      setURL
      sh -c  "xmlrpc_call $URL $NAMESPACE.templates 1>/dev/null 2>&1"
      if [ $? -eq 255 ]
      then
        echo "OK"
        break
      fi ;
      sleep $CHECKINTERVAL
    done

    if [ $CHECK == $COUNTER ]
      then
        echo "FAILED"
    fi
  else
    echo "$DAEMON (no pid file) not running"
  fi
}

reloadDaemon () {
  printf "%-50s" "Reloading $DAEMON config"
  if [ -f $PIDFILE ]
  then
    PID=`cat $PIDFILE`
    kill -HUP $PID
    if [ $? -eq 0 ]
    then
      echo "OK"
    else
      echo "FAILED"
    fi
  else
    echo "$DAEMON (no pid file) not running"
  fi
}

case $1 in
'start')
  startDaemon
  ;;

'stop')
  stopDaemon
  ;;

'restart')
  stopDaemon
  startDaemon
  ;;

'reload')
  reloadDaemon
  ;;

'status')
  if [ -f $PIDFILE ]
  then
    PID=`cat $PIDFILE`
    PROCPATH="/proc/$PID/environ"
    if [ -e $PROCPATH ]
    then
      printf "%-50s" "Daemon $DAEMON is"   
      echo "running"
    else
      echo "$DAEMON (no process found) not running"
      exit
     fi
  else
    echo "$DAEMON (no pid) not running"
    exit
  fi

  sh -c "sxc_call $NAMESPACE tasks 1>/dev/null 2>&1"
  if [ $? -eq 255 ]
  then
    echo "no matching component found (can't connect to registry)"
    exit
  fi
  INSTANCES=`sxc_call $NAMESPACE instances 2>/dev/null` 
  for instance in $INSTANCES
  do
    printf "%-50s" "Instance $instance is"
    STATUS=`sh -c "sxc_call $NAMESPACE isRunning $instance"`
    if [ $STATUS = 0 ]
    then
      echo "not running"
    else
      echo "running"
    fi
  done
  ;;

*)
  echo
  echo "SKYRiX $DAEMON .rc script"
  echo
  echo "usage: $0 (start|stop|restart|reload|status|help)"  
  echo
  echo "start      - start $DAEMON"
  echo "stop       - stop $DAEMON by sending SIGINT"
  echo "restart    - restart $DAEMON if running, start if not running"
  echo "reload     - reload $DAEMON config by sending SIGHUP"
  echo "status     - show the status of the $DAEMON tasks"
  echo "help       - this screen"
  ;;
esac