OLD :::
cd /Applications/"Bukkit Server";
sh launchserver.command;
sleep 5;     //allows the server (minecraft server) to get fully started before proceeding
ps -axww | /usr/bin/grep 'java';         //searches through processes matching 'java'
read $pid;                            //user enters the pid of the minecraft server process
renice -20 $pid;   //grants -20 priority to the minecraft process
screen -aArd minecraft;              //sends the user to the minecraft console, which has a screen attached to it

::::::

new ::::

#!/bin/sh
cd /Applications/"Bukkit Server"
#ensure the launcher is executable.
#
chmod 0755 launchserver.command
#
#next command all ready uses SCREEN
./launchserver.command >/dev/null 2>&1 &
#sleep for a bit let it start up
sleep 10
#
#find the pid of minecraft server, however it spawns 2 PIDs
# we need to determine from minecraft which pid
# should be sent the renice command.  either ?? or the tty
# find out from mindcraft support geeks
#
mypid=`ps -ef |grep minecraft | grep -v grep | awk '{print $2}'`
# force renice of minecraft
renice -20 $mypid
#
#optional,  change to the screen where minecraft console is running
#just remove the #
#screen -aArd minecraft
#
#end of script
exit