Bukkit, restart script

The script we use to stop bukkit, tar up the world, render the overviewer map and restart bukkit again. The last part is rather silly as it involves a hacky way of getting a screen going that accepts "-X stuff". Reason is the screen has to have been connected to and detached again for it to work.

#!/bin/bash
# Heads up if anyones actually playing at the time of the restart.
# btw: `echo -ne '\015'` << sends "enter"
screen -S mine -X stuff "broadcast Going down in 5m!"`echo -ne '\015'`
sleep 200
screen -S mine -X stuff "save-all"`echo -ne '\015'`
sleep 30
screen -S mine -X stuff "broadcast Going down in 60s! Will be back in a while."`echo -ne '\015'`
sleep 30
screen -S mine -X stuff "broadcast Going down in 30s!"`echo -ne '\015'`
sleep 15
screen -S mine -X stuff "broadcast Going down in 15s!"`echo -ne '\015'`
sleep 15
screen -S mine -X stuff "broadcast Going down NOW!"`echo -ne '\015'`
sleep 1
screen -S mine -X stuff "stop"`echo -ne '\015'`
sleep 60

# Taring the world if anyone wants to download
tar -zcf /home/mine/viewer/world.tar.gz /home/mine/minecraft/world/

# Overviewer!
# Letting the server stay down while rendering. Not necessary.
/home/mine/overviewer/render.sh
sleep 30

# Getting a screen running that accepts -X stuff.
# There's a known bug (since 2008) where the screen session must be attached at least once to be able
# to receive commands through -X.
# First we start one screen with the express purpose of starting another screen and then close. 
# The second screen is then detached and we have our once-detached-screen accepting -X stuff. Yay!
screen -dmS tempmine bash -c "sleep 120"
sleep 1
screen -S tempmine -X screen screen -dR mine /home/mine/minecraft/server.sh
sleep 1
screen -S mine -X detach
sleep 15
screen -S mine -X stuff "broadcast Aaaaaaand we are back!"`echo -ne '\015'`