rc.minecraft

#!/bin/bash
# /etc/init.d/minecraft
# version 0.3.7 2012-03-06 (YYYY-MM-DD)
# Updated by agentc0re
# version 0.3.8 2012-04-08
# Changed script to work for rtoolkit

### BEGIN INIT INFO
# Provides:   minecraft
# Required-Start: $local_fs $remote_fs
# Required-Stop:  $local_fs $remote_fs
# Should-Start:   $network
# Should-Stop:    $network
# Default-Start:  2 3 4 5
# Default-Stop:   0 1 6
# Short-Description:    Minecraft server
# Description:    Starts the minecraft server
### END INIT INFO

#Settings

#Linux username that the service will run as
USERNAME='minecraft'
MCPATH='/home/minecraft/Minecraft'

#screen path location.
SCREEN=$(which screen)

#Java path location and options.  The path should
#be found automatically, but you can specify it manually
#if you run into issues.
#JAVA="/PATH/TO/JAVA"
JAVA=$(which java)
JAVAOPTS="-Xmx30M -Xms30M -XX:MaxPermSize=40M"

#User and Pass for rtoolkit
USER=
PASS=
SERVICE='Minecraft_RKit.jar'
INVOCATION="$JAVA $JAVAOPTS -jar $SERVICE $USER:$PASS"

####
# Shouldn't need to edit anything below this line
####

ME=`whoami`
as_user() {
  if [ $ME == $USERNAME ] ; then
    bash -c "$1"
  else
    su - $USERNAME -c "$1"
  fi
}

mc_start() {
  if  pgrep -u $USERNAME -f $SERVICE > /dev/null
  then
    echo "$SERVICE is already running!"
  else
    echo "Starting $SERVICE..."
    cd $MCPATH
    as_user "cd $MCPATH && $SCREEN -dmS minecraft $INVOCATION"
    sleep 7
    if pgrep -u $USERNAME -f $SERVICE > /dev/null
    then
      echo "$SERVICE is now running."
    else
      echo "Error! Could not start $SERVICE!"
    fi
  fi
}

mc_saveoff() {
  if pgrep -u $USERNAME -f $SERVICE > /dev/null
  then
    echo "$SERVICE is running... suspending saves"
    as_user "$SCREEN -p 0 -S minecraft -X eval 'stuff \"say SERVER BACKUP STARTING. Server going readonly...\"\015'"
    as_user "$SCREEN -p 0 -S minecraft -X eval 'stuff \"save-off\"\015'"
    as_user "$SCREEN -p 0 -S minecraft -X eval 'stuff \"save-all\"\015'"
    sync
    sleep 10
  else
    echo "$SERVICE is not running. Not suspending saves."
  fi
}

mc_saveon() {
  if pgrep -u $USERNAME -f $SERVICE > /dev/null
  then
    echo "$SERVICE is running... re-enabling saves"
    as_user "$SCREEN -p 0 -S minecraft -X eval 'stuff \"save-on\"\015'"
    as_user "$SCREEN -p 0 -S minecraft -X eval 'stuff \"say SERVER BACKUP ENDED. Server going read-write...\"\015'"
  else
    echo "$SERVICE is not running. Not resuming saves."
  fi
}

mc_stop() {
  if pgrep -u $USERNAME -f $SERVICE > /dev/null
  then
    echo "Stopping $SERVICE"
    as_user "$SCREEN -p 0 -S minecraft -X eval 'stuff \"say SERVER SHUTTING DOWN IN 10 SECONDS. Saving map...\"\015'"
    as_user "$SCREEN -p 0 -S minecraft -X eval 'stuff \"save-all\"\015'"
    sleep 10
    as_user "$SCREEN -p 0 -S minecraft -X eval 'stuff \".stopwrapper\"\015'"
    sleep 15
  else
    echo "$SERVICE was not running."
  fi
  if pgrep -u $USERNAME -f $SERVICE > /dev/null
  then
    echo "Error! $SERVICE could not be stopped."
  else
    echo "$SERVICE is stopped."
  fi
}

mc_command() {
  command="$1";
  if pgrep -u $USERNAME -f $SERVICE > /dev/null
  then
    pre_log_len=`wc -l "$MCPATH/server.log" | awk '{print $1}'`
    echo "$SERVICE is running... executing command"
    as_user "$SCREEN -p 0 -S minecraft -X eval 'stuff \"$command\"\015'"
    sleep .1 # assumes that the command will run and print to the log file in less than .1 seconds
    # print output
    tail -n $[`wc -l "$MCPATH/server.log" | awk '{print $1}'`-$pre_log_len] "$MCPATH/server.log"
  fi
}

#Start-Stop here
case "$1" in
  start)
    mc_start
    ;;
  stop)
    mc_stop
    ;;
  restart)
    mc_stop
    mc_start
    ;;
  status)
    if pgrep -u $USERNAME -f $SERVICE > /dev/null
    then
      echo "$SERVICE is running."
    else
      echo "$SERVICE is not running."
    fi
    ;;
  command)
    if [ $# -gt 1 ]; then
      shift
      mc_command "$*"
    else
      echo "Must specify server command (try 'help'?)"
    fi
    ;;

  *)
  echo "Usage: $0 {start|stop|status|restart|command \"server command\"}"
  exit 1
  ;;
esac

exit 0