bin/minecraft_init

   1 #!/bin/bash
   2 # /etc/init.d/minecraft
   3 # version 0.3.2 2011-01-27 (YYYY-MM-DD)
   4
   5 ### BEGIN INIT INFO
   6 # Provides:   minecraft
   7 # Required-Start: $local_fs $remote_fs
   8 # Required-Stop:  $local_fs $remote_fs
   9 # Should-Start:   $network
  10 # Should-Stop:    $network
  11 # Default-Start:  2 3 4 5
  12 # Default-Stop:   0 1 6
  13 # Short-Description:    Minecraft server
  14 # Description:    Starts the minecraft server
  15 ### END INIT INFO
  16
  17 #Settings
  18 SERVICE='minecraft_server.jar'
  19 USERNAME="minecraft"
  20 MCPATH='/home/minecraft/minecraft'
  21 CPU_COUNT=2
  22 INVOCATION="java -Xmx1024M -Xms1024M -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalPacing -XX:ParallelGCThreads=$CPU_COUNT -XX:+AggressiveOpts -jar minecraft_server.jar nogui"
  23 BACKUPPATH='/home/minecraft/minecraft/minecraft.backup'
  24
  25 ME=`whoami`
  26 as_user() {
  27   if [ $ME == $USERNAME ] ; then
  28     bash -c "$1"
  29   else
  30     su - $USERNAME -c "$1"
  31   fi
  32 }
  33
  34 mc_start() {
  35   if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
  36   then
  37     echo "Tried to start but $SERVICE was already running!"
  38   else
  39     echo "$SERVICE was not running... starting."
  40     cd $MCPATH
  41     as_user "cd $MCPATH && screen -dmS minecraft $INVOCATION"
  42     sleep 7
  43     if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
  44     then
  45       echo "$SERVICE is now running."
  46     else
  47       echo "Could not start $SERVICE."
  48     fi
  49   fi
  50 }
  51
  52 mc_saveoff() {
  53         if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
  54         then
  55                 echo "$SERVICE is running... suspending saves"
  56                 as_user "screen -p 0 -S minecraft -X eval 'stuff \"say SERVER BACKUP STARTING. Server going readonly...\"\015'"
  57                 as_user "screen -p 0 -S minecraft -X eval 'stuff \"save-off\"\015'"
  58                 as_user "screen -p 0 -S minecraft -X eval 'stuff \"save-all\"\015'"
  59                 sync
  60                 sleep 10
  61         else
  62                 echo "$SERVICE was not running. Not suspending saves."
  63         fi
  64 }
  65
  66 mc_saveon() {
  67         if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
  68         then
  69                 echo "$SERVICE is running... re-enabling saves"
  70                 as_user "screen -p 0 -S minecraft -X eval 'stuff \"save-on\"\015'"
  71                 as_user "screen -p 0 -S minecraft -X eval 'stuff \"say SERVER BACKUP ENDED. Server going read-write...\"\015'"
  72         else
  73                 echo "$SERVICE was not running. Not resuming saves."
  74         fi
  75 }
  76
  77 mc_stop() {
  78         if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
  79         then
  80                 echo "$SERVICE is running... stopping."
  81                 as_user "screen -p 0 -S minecraft -X eval 'stuff \"say SERVER SHUTTING DOWN IN 10 SECONDS. Saving map...\"\015'"
  82                 as_user "screen -p 0 -S minecraft -X eval 'stuff \"save-all\"\015'"
  83                 sleep 10
  84                 as_user "screen -p 0 -S minecraft -X eval 'stuff \"stop\"\015'"
  85                 sleep 7
  86         else
  87                 echo "$SERVICE was not running."
  88         fi
  89         if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
  90         then
  91                 echo "$SERVICE could not be shut down... still running."
  92         else
  93                 echo "$SERVICE is shut down."
  94         fi
  95 }
  96
  97
  98 mc_update() {
  99   if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
 100   then
 101     echo "$SERVICE is running! Will not start update."
 102   else
 103 #    MC_SERVER_URL=http://minecraft.net/`wget -q -O - http://www.minecraft.net/download.jsp | grep minecraft_server.jar\</a\> | cut -d \" -f 2`
 104     MC_SERVER_URL="https://s3.amazonaws.com/MinecraftDownload/launcher/minecraft_server.jar?"
 105     as_user "cd $MCPATH && wget -q -O $MCPATH/minecraft_server.jar.update $MC_SERVER_URL"
 106     if [ -f $MCPATH/minecraft_server.jar.update ]
 107     then
 108       if `diff $MCPATH/minecraft_server.jar $MCPATH/minecraft_server.jar.update >/dev/null`
 109         then
 110           echo "You are already running the latest version of $SERVICE."
 111         else
 112           as_user "mv $MCPATH/minecraft_server.jar.update $MCPATH/minecraft_server.jar"
 113           echo "Minecraft successfully updated."
 114       fi
 115     else
 116       echo "Minecraft update could not be downloaded."
 117     fi
 118   fi
 119 }
 120
 121 mc_backup() {
 122    echo "Backing up minecraft world"
 123    if [ -d $BACKUPPATH/`date "+%Y.%m.%d"`_world ]
 124    then
 125      for i in 1 2 3 4 5 6
 126      do
 127        if [ -d $BACKUPPATH/`date "+%Y.%m.%d"`-${i}_world ]
 128        then
 129          continue
 130        else
 131          as_user "cd $MCPATH && cp -r world $BACKUPPATH/`date "+%Y.%m.%d"`-${i}_world"
 132          break
 133        fi
 134      done
 135    else
 136      as_user "cd $MCPATH && cp -r world $BACKUPPATH/`date "+%Y.%m.%d"`_world"
 137      echo "Backed up world"
 138    fi
 139    echo "Backing up the minecraft server executable"
 140    if [ -f "$BACKUPPATH/`date "+%Y.%m.%d"`_minecraft_server.jar" ]
 141    then
 142      for i in 1 2 3 4 5 6
 143      do
 144        if [ -f "$BACKUPPATH/`date "+%Y.%m.%d"`-${i}_minecraft_server.jar" ]
 145        then
 146          continue
 147        else
 148          as_user "cd $MCPATH && cp minecraft_server.jar \"$BACKUPPATH/`date "+%Y.%m.%d"`-${i}_minecraft_server.jar\""
 149          break
 150        fi
 151      done
 152    else
 153      as_user "cd $MCPATH && cp minecraft_server.jar \"$BACKUPPATH/`date "+%Y.%m.%d"`_minecraft_server.jar\""
 154    fi
 155    echo "Backup complete"
 156 }
 157
 158
 159 #Start-Stop here
 160 case "$1" in
 161   start)
 162     mc_start
 163     ;;
 164   stop)
 165     mc_stop
 166     ;;
 167   restart)
 168     mc_stop
 169     mc_start
 170     ;;
 171   update)
 172     mc_stop
 173     mc_backup
 174     mc_update
 175     mc_start
 176     ;;
 177   backup)
 178     mc_saveoff
 179     mc_backup
 180     mc_saveon
 181     ;;
 182   status)
 183     if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
 184     then
 185       echo "$SERVICE is running."
 186     else
 187       echo "$SERVICE is not running."
 188     fi
 189     ;;
 190
 191   *)
 192   echo "Usage: /etc/init.d/minecraft {start|stop|update|backup|status|restart}"
 193   exit 1
 194   ;;
 195 esac
 196
 197 exit 0