mc.sh

#!/bin/bash
SERVERNAME="placeholder"
SERVICE="placeholder.jar"
MCPATH="/home/user/placeholder"
BACKUPPATH="/hd2/backups/placeholder"
INVOCATION="java -Xms2G -Xmx8G -jar $SERVICE" 
 
 
mc_start() {
  if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
  then
    PID="`ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE | awk '{print $1}'`"
    echo " * $SERVERNAME was already running! (pid $PID)"
    exit 1;
  else
    echo " * $SERVERNAME was not already running. Starting.."
    cd $MCPATH && screen -dmS $SERVERNAME $INVOCATION
    sleep 1
    echo " * Checking if $SERVERNAME has started"
    if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
    then
      PID="`ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE | awk '{print $1}'`"
      echo " * $SERVERNAME is now running. (pid $PID)"
    else
      echo " * Could not start $SERVERNAME."
      exit 1; 
    fi
 
  fi
}

mc_stop() {
  if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
  then
    PID="`ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE | awk '{print $1}'`"
    echo " * $SERVERNAME is running (pid $PID), shutting down"
    echo " * Notifying users of shutdown..."
    screen -p 0 -S $SERVERNAME -X eval 'stuff "say SERVER RESTARTING\015"'
    sleep 4
    echo " * Stopping $SERVERNAME..."
    screen -p 0 -S $SERVERNAME -X eval 'stuff "stop\015"'
  else
    echo " * $SERVERNAME was not running!"
    exit 1;
  fi
  sleep 10
  if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
  then
    echo " * $SERVERNAME could not be shutdown!"
    exit 1;
  else
    echo " * $SERVERNAME is shut down."
  fi
}
 
 
mc_status() {
  if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
  then
    PID="`ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE | awk '{print $1}'`"
    echo " * $SERVERNAME (pid $PID) is running"
  else
    echo " * $SERVERNAME is not running."
    exit 1;
  fi
}
 
 
mc_info() {
  if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
  then
    PID="`ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE | awk '{print $1}'`"
    RSS="`ps -p $PID --format rss | tail -n 1`"
    echo " - $SERVERNAME size    : `cd $MCPATH && du -hs`"
    echo " - Process ID        : "$PID""
    echo " - Memory Usage      : `expr $RSS / 1024` Mb ($RSS kb)"
    echo " - Active Connections : "
    netstat -tna | grep -E "Proto|25565"
  else
    echo " * $SERVERNAME is not running."
  fi
}

mc_command() {
  screen -p 0 -S $SERVERNAME -X eval "stuff '$1'\015"
}

mc_backup() {
  echo " * Backing up $SERVERNAME"
  screen -p 0 -S $SERVERNAME -X eval 'stuff "save-all\015"'
  NOW="`date "+%Y-%m-%d"`"
  zip -r $BACKUPPATH/$SERVERNAME_$NOW.zip $MCPATH
}
mc_removeoldbackups() {
  NUMBEROFBACKUPS="`find \"$BACKUPPATH\" -name \"$SERVERNAME*\" -type f -mtime +5 | wc -l`"
  if [ $NUMBEROFBACKUPS -ge 1 ]
  then
    echo " * Removing map backups older than 5 days"
    cd $BACKUPPATH && find . -name "$SERVERNAME*" -type f -mtime +5 | xargs rm -fv
    echo " * Removed old map backups"
  else
    echo " * No map backups older than 5 days to remove"
  fi
}
mc_kill() {
 PID="`ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE | awk '{print $1}'`"
 kill -9 $PID
 echo " * killing $PID"
}

case "$1" in
  start)
mc_start
;;
  stop)
mc_stop
;;
  kill)
mc_kill
;;
  res)
screen -r $SERVERNAME
;;
  restart)
mc_stop
sleep 10
mc_start
;;
  status)
mc_status
;;
  info)
mc_info
;;
  command)
mc_command "$2"
;;
  backup)
mc_backup
;;
  removeoldbackups)
mc_removeoldbackups
;;
  *)
echo " * Usage: $0 {start|stop|kill|restart|status|info|command|res|backup|removeoldbackups}"
exit 1;
;;
esac
 
exit 0;