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#!/bin/bash
#CONFIG
JRE_JAVA="java"
JVM_ARGS="-Xms512M -Xmx512M"
JAR="server.jar"
JAR_ARGS="-nogui"
SCREEN_WINDOW="minecraftserverscreen"
WORLD_NAME="world"
LOGFILE="server-screen.log"
PIDFILE="server-screen.pid"
#HOOKS
BACKUP_HOOK='backup_hook_example'
function backup_hook_example {
echo $ARCHNAME
}
function send_cmd () {
screen -S $SCREEN_WINDOW -p 0 -X stuff "$1^M"
}
function assert_running() {
if [ ! -e $PIDFILE ]; then
return
fi
ps -p $(cat $PIDFILE) > /dev/null
if [ $? -eq 0 ]
then
echo "It seems a server is already running. If this is not the case,\
manually attach to the running screen and close it."
exit 1
fi
}
function assert_not_running() {
if [ ! -e $PIDFILE ]; then
echo "Server not running"
exit 1
fi
ps -p $(cat $PIDFILE) > /dev/null
if [ ! $? -eq 0 ]
then
echo "Server not running"
exit 1
fi
}
function server_start() {
assert_running
if [ ! -e "eula.txt" ]
then
echo "eula.txt not found. Creating and accepting EULA."
echo "eula=true" > eula.txt
fi
rm -f $LOGFILE
screen -L -Logfile "$LOGFILE" -S $SCREEN_WINDOW -p 0 -D -m \
$JRE_JAVA $JVM_ARGS -jar $JAR $JAR_ARGS > /dev/null &
echo $! > $PIDFILE
echo Started with PID $!
exit
}
function server_stop() {
assert_not_running
send_cmd "stop"
local RET=1
while [ ! $RET -eq 0 ]
do
sleep 1
ps -p $(cat $PIDFILE) > /dev/null
RET=$?
done
echo "stopped the server"
rm -f $PIDFILE
exit
}
function server_attach() {
assert_not_running
screen -r -p 0 $SCREEN_WINDOW
exit
}
function server_status() {
ps -p $(cat $PIDFILE) > /dev/null
if [ $? -eq 0 ]
then
echo "Server is running"
else
echo "Server is not running"
fi
exit
}
function server_backup_safe() {
echo "Detected running server. Disabling autosave"
send_cmd "save-off"
send_cmd "save-all flush"
echo "Waiting for save... If froze, run /save-on to re-enable autosave!!"
sleep 1
while [ $(tail -n 3 "$LOGFILE" | grep -c "Saved the game") -lt 1 ]
do
sleep 1
done
echo "Done! starting backup..."
create_backup_archive
local RET=$?
echo "Re-enabling auto-save"
send_cmd "save-on"
if [ $RET -eq 0 ]
then
echo Running backup hook
$BACKUP_HOOK
fi
}
function server_backup_unsafe() {
echo "No running server detected. Running Backup"
create_backup_archive
if [ $? -eq 0 ]
then
echo Running backup hook
$BACKUP_HOOK
fi
}
function create_backup_archive() {
ARCHNAME="backup/$WORLD_NAME-backup_`date +%d-%m-%y-%T`.tar.gz"
tar -czf "$ARCHNAME" "./$WORLD_NAME"
if [ ! $? -eq 0 ]
then
echo "TAR failed. No Backup created."
rm $ARCHNAME #remove (probably faulty) archive
return 1
else
echo $ARCHNAME created.
fi
}
function server_backup() {
screen -list $SCREEN_WINDOW > /dev/null
if [ $? -eq 0 ]
then #Server is running
server_backup_safe
else #Not running
server_backup_unsafe
fi
exit
}
cd $(dirname $0)
case $1 in
"start")
server_start
;;
"stop")
server_stop
;;
"attach")
server_attach
;;
"backup")
server_backup
;;
"status")
server_status
;;
*)
echo "Usage: $0 start|stop|attach|status|backup"
;;
esac
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