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 ////////////////// 下方是minecraft server 的system V init script //////////////

#!/bin/bash

# /etc/init.d/minecraft
# version 0.5 2011-09-24 (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='minecraft_server.jar'
USERNAME="mine"
MCSTORE="/home/$USERNAME/minecraft"
MCPATH="/home/$USERNAME/minecraft_ramdisk"
CPU_COUNT=1
INVOCATION="java -Xmx2048M -Xms2048M -server -jar $SERVICE nogui"
BACKUPPATH="/home/$USERNAME/minecraft_backups/"
ME=`whoami`
as_user() {
if [ "$ME" == "$USERNAME" ] ; then
bash -c "$1"
else
su - $USERNAME -c "$1"
fi
}

mc_start() {
if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
then
echo "Tried to start but $SERVICE was already running!"
else
echo "$SERVICE was not running... starting."
cd $MCPATH
if [ ! -f "$MCPATH/minecraft_server.jar" ]
then
echo "Ram drive empty... prepping."
as_user "cp -R $MCSTORE/* $MCPATH/"
fi
as_user "cd $MCPATH && screen -dmS minecraft $INVOCATION"
sleep 7
if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
then
echo "$SERVICE is now running."
else
echo "Could not start $SERVICE."
fi
fi
}

mc_saveoff() {
if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
then
echo "$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 was not running. Not suspending saves."
fi
}

mc_saveon() {
if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
then
echo "$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 was not running. Not resuming saves."
fi
}

mc_stop() {
if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
then
echo "$SERVICE is running... stopping."
as_user "screen -p 0 -S minecraft -X eval 'stuff \"say SERVER SHUTTING DOWN IN 5 SECONDS. Saving map...\"\015'"
as_user "screen -p 0 -S minecraft -X eval 'stuff \"save-all\"\015'"
sleep 5
as_user "screen -p 0 -S minecraft -X eval 'stuff \"stop\"\015'"
sleep 5
else
echo "$SERVICE was not running."
fi
if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
then
echo "$SERVICE could not be shut down... still running."
else
echo "$SERVICE is shut down."
fi
}
mc_update() {
if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
then
echo "$SERVICE is running! Will not start update."
else
MC_SERVER_URL=http://minecraft.net/`wget -q -O - http://www.minecraft.net/download.jsp | grep minecraft_server.jar\ | cut -d \" -f 2`
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/minecraft_server.jar $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/minecraft_server.jar"
echo "Minecraft successfully updated."
fi
else
echo "Minecraft update could not be downloaded."
fi
fi
}

mc_backup() {
echo "Backing up minecraft files"
if [ -f $BACKUPPATH/MCBKUP_`date "+%Y.%m.%d"`.tar.gz ]
then
for i in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24
do
if [ -f $BACKUPPATH/MCBKUP_`date "+%Y.%m.%d"`-$i.tar.gz ]
then
continue
else
as_user "cd $MCSTORE && tar zcf $BACKUPPATH/MCBKUP_`date "+%Y.%m.%d"`-$i.tar.gz ."
break
fi
done
else
as_user "cd $MCSTORE && tar zcf $BACKUPPATH/MCBKUP_`date "+%Y.%m.%d"`.tar.gz ."
fi
echo "Backup complete"
}

mc_disksaverun() {

if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
then
echo "Saving ramdrive to disk."
if [ ! -f $MCPATH/$SERVICE ]
then
echo "Error.. Minecraft not in ram"
else
if [ -d $MCSTORE/world2 ]
then
as_user "rm -r $MCSTORE/world2"
fi
if [ -d $MCSTORE/world ]
then
as_user "mv $MCSTORE/world $MCSTORE/world2"
fi

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'"
as_user "cp -R $MCPATH/* $MCSTORE/"
as_user "screen -p 0 -S minecraft -X eval 'stuff \"save-on\"\015'"

if [ -d $MCSTORE/world2 ]
then
as_user "rm -r $MCSTORE/world2"
fi
fi
else
echo "Service is not running"
fi

}

mc_disksavehalt() {
echo "Saving ramdrive to disk."
if [ ! -f $MCPATH/minecraft_server.jar ]
then
echo "Error.. Minecraft not in ram"
else
if [ -d $MCSTORE/world2 ]
then
as_user "rm -r $MCSTORE/world2"
fi
if [ -d $MCSTORE/world ]
then
as_user "mv $MCSTORE/world $MCSTORE/world2"
fi

echo "Saving, screen session closed"
as_user "cp -R $MCPATH/* $MCSTORE/"

if [ -d $MCSTORE/world2 ]
then
as_user "rm -r $MCSTORE/world2"
fi
fi
}
#Start-Stop here
case "$1" in
start)
mc_start
;;
stop)
mc_stop
mc_disksavehalt
;;
restart)
mc_stop
mc_disksavehalt
mc_start
;;
update)
mc_stop
mc_backup
mc_update
mc_start
;;
backup)
mc_disksaverun
mc_saveoff
mc_backup
mc_saveon
;;
disksavehalt)
mc_disksavehalt
;;
disksaverun)
mc_disksaverun
;;
status)
if ps ax | grep -v grep | grep -v -i SCREEN | grep $SERVICE > /dev/null
then
echo "$SERVICE is running."
else
echo "$SERVICE is not running."
fi
;;

*)
echo "Usage: /etc/init.d/minecraft {start|stop|update|backup|status|restart|disksaverun}"
exit 1
;;
esac

exit 0