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#!/bin/bash
 # /etc/init.d/minecraft
 # version 0.3.6 2011-10-17 (YYYY-MM-DD)

 ### 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
 SERVICE='craftbukkit-1.0.0-SNAPSHOT.jar'
 OPTIONS='nogui'
 USERNAME='root'
 WORLD='world'
 MCPATH='/home/milten/DannlyCraft'
 BACKUPPATH='/media/remote.share/minecraft.backup'
 CPU_COUNT=1
 INVOCATION="java -Xmx8192M -Xms8192M -Xincgc -jar craftbukkit-1.0.0-SNAPSHOT.jar"


 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 $SERVICE"
 as_user "screen -p 0 -S minecraft -X eval 'stuff \"say SERVER SHUTTING DOWN IN 10 SECONDS. Saving map...\"\015'"
 as_user "screen -p 0 -S minecraft -X eval 'stuff \"save-all\"\015'"
 sleep 10
 as_user "screen -p 0 -S minecraft -X eval 'stuff \"stop\"\015'"
 sleep 7
 else
 echo "$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_update() {
 if pgrep -u $USERNAME -f $SERVICE > /dev/null
 then
 echo "$SERVICE is running! Will not start update."
 else
 MC_SERVER_URL=http://s3.amazonaws.com/MinecraftDownload/launcher/minecraft_server.jar?v=`date | sed "s/[^a-zA-Z0-9]/_/g"`
 as_user "cd $MCPATH && wget -q -O $MCPATH/minecraft_server.jar.update $MC_SERVER_URL"
 if [ -f $MCPATH/minecraft_server.jar.update ]
 then
 if `diff $MCPATH/$SERVICE $MCPATH/minecraft_server.jar.update >/dev/null`
 then
 echo "You are already running the latest version of $SERVICE."
 else
 as_user "mv $MCPATH/minecraft_server.jar.update $MCPATH/$SERVICE"
 echo "Minecraft successfully updated."
 fi
 else
 echo "Minecraft update could not be downloaded."
 fi
 fi
 }

 mc_backup() {
 echo "Backing up minecraft world..."
 if [ -d $BACKUPPATH/${WORLD}_`date "+%Y.%m.%d_%H.%M"` ]
 then
 for i in 1 2 3 4 5 6
 do
 if [ -d $BACKUPPATH/${WORLD}_`date "+%Y.%m.%d_%H.%M"`-$i ]
 then
 continue
 else
 as_user "cd $MCPATH && cp -r $WORLD $BACKUPPATH/${WORLD}_`date "+%Y.%m.%d_%H.%M"`-$i"
 break
 fi
 done
 else
 as_user "cd $MCPATH && cp -r $WORLD $BACKUPPATH/${WORLD}_`date "+%Y.%m.%d_%H.%M"`"
 echo "Backed up world"
 fi
 echo "Backing up $SERVICE"
 if [ -f "$BACKUPPATH/minecraft_server_`date "+%Y.%m.%d_%H.%M"`.jar" ]
 then
 for i in 1 2 3 4 5 6
 do
 if [ -f "$BACKUPPATH/minecraft_server_`date "+%Y.%m.%d_%H.%M"`-$i.jar" ]
 then
 continue
 else
 as_user "cd $MCPATH && cp $SERVICE \"$BACKUPPATH/minecraft_server_`date "+%Y.%m.%d_%H.%M"`-$i.jar\""
 break
 fi
 done
 else
 as_user "cd $MCPATH && cp $SERVICE \"$BACKUPPATH/minecraft_server_`date "+%Y.%m.%d_%H.%M"`.jar\""
 fi
 echo "Backup complete"
 }

 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
 ;;
 update)
 mc_stop
 mc_backup
 mc_update
 mc_start
 ;;
 backup)
 mc_saveoff
 mc_backup
 mc_saveon
 ;;
 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: /etc/init.d/minecraft {start|stop|update|backup|status|restart|command \"server command\"}"
 exit 1
 ;;
 esac

 exit 0