Minecraft Server Control Bash Script w/ Ram Drive Control

#!/bin/bash
# /etc/init.d/minecraft
# version 2.01 2013-11-09
# by surferpup
# Starts and administers a Minecraft Server with RamDrive Option
#
# Script allows for Start/Stop/Restart Minecraft
#                      -- will auto configure RamDrive if desired
#                   Specify Java and jarfile settings
#                   Show server status
#                   Execute Minecraft Command
#                   Reboot Server
#                   Backup Mincraft (daily, weekly, etc)
#                   Manage Hourly/Daily/Weekly/Monthly/Manual BKU files
#                   Synchronize Ram Drive (if used)
#                   Chime (i.e. Hourly Server Chime)
#                   Random Quotes (if you provide a file)
#                   Cleaning of Cron Log on Start
#                   Interacts with Cron nicely
#                   Displays Help
#
# TODO:
#
#                   Add feature to create backup directories if they do not exist
#                   Create Selectable Restore from Backup
#                   Error recovery (allow to auto-move world.bak to world)
#                   Full install script (automate settings and setup)
#
#
#  NOTES:  1) I run my Feed the Beast Unleashed server on Ubunutu, and I am using mcpc+.  This script accommodates these settings.
#          2) I am using a 4GB RamDrive (/dev/shm) which I have modified in /etc/fstab to only be 4GB.
#             The RamDrive is synchronized every 5 minutes by a cron job executing this script
#          3) I currently run two Minecraft servers on the same host with two copies of this script.  For you to do so,
#             you need to make sure each instance has a different mine craft folder, a differently-named jar file, a different world location
#             and you will need customzed versions of this script for each instance (it really isn't that difficult).
#          4) I am using HugePages -- if you want to do so, you will need to modify /etc/sysctl.conf and /etc/security/limits.conf
#             There is a great calculator for HugePages here -> http://www.peuss.de/node/67  You will need to set a user group for large pages.
#          5) I chmod 755 the script and copied it to /etc/init.d.  I then placed a symlink in /usr/local/bin (ln -s /etc/inti.d/minecraft /usr/local/bin)
#             This allows it to run without the ./ prefix or the .sh extension.
#          6) I also modified rc.local to execute this script on startup by adding the following command (which also sends messages to my log file):
#                 sudo -u surferpup /etc/init.d/minecraft start >> /home/surferpup/minecraft.cronlog 2>&1
#          7) I am including my crontab entries below (sudo crontab -e to edit yours).
#          8) For backups to work properly, you must create a backup folder outside of the Minecraft Install, and subfolders in that folder named as follows:
#                     hourly,daily,weekly,monthly,manual
#             Make sure to set the number of backup files in each class you wish to keep.
#          8) This script is working well on a production server of 10-12 players, although it would work for any size server.
#             -- I literally pay no mind to the server now, it just runs.  Enjoy.
#
# CHANGELOG
#   VER      DATE            CHANGE
#       -----    -------------   ----------------------------------------------------------------------------
#       2.01      2013-11-09     -- Corrected problem in mc_resstart and _mc_reboot where giving backup option
#                                   would not issue user warnings.
########################################################
### CRONTAB ENTRIES EXAMPLE -- for automating functions
#########################################################
# These entries will execute accoringly and send output to logifle.
# m h  dom mon dow   command
# Random Quote - at 18,33 and 48 Minutes every hour except 7 am.
# 18,33,48 0-6,8-23 * * *         su -c '/etc/init.d/minecraft quote >> /home/surferpup/minecraft.cronlog 2>&1' -s /bin/sh surferpup
# Restart Minecraft with Daily Backup Odd Days at 7 am (30 minute warning starts at 6:30)
# 30 6 1-31/2 * *                 su -c '/etc/init.d/minecraft restart daily >> /home/surferpup/minecraft.cronlog 2>&1' -s /bin/sh surferpup
# Reboot Server with Daily Backup Even Days at 7 am(30 minute warning starts at 6:30)
# 30 6 2-30/2 * *                 su -c '/etc/init.d/minecraft reboot daily >> /home/surferpup/minecraft.cronlog 2>&1' -s /bin/sh surferpup
# Synchronize RamDrive every 5 Minutes except at minute 0 (backups/restarts and chimes run then)
# 5-55/5 * * * *          su -c '/etc/init.d/minecraft ramdrivesave >> /home/surferpup/minecraft.cronlog 2>&1' -s /bin/sh surferpup
# Hourly Chime with Backup (not at 7 am -- restart or reboot will run)
# 0 0-6,8-23 * * *        su -c '/etc/init.d/minecraft chime hourly >> /home/surferpup/minecraft.cronlog 2>&1' -s /bin/sh surferpup
# Note:  Weekly and Monthly Backup handled automatically by script.  Goal is to not duplicate backups.
#        If Daily backups fall on first of week or first of month, then the script will change them to weekly or monthly surferpup
#
#
########################################################
### MINECRAFT SERVER SETTINGS
########################################################
#echo "Number of args = $#"
JARFILE="mcpcp.jar"                             # Jarfile of Minecraft server
SERVICENAME="minecraft"                         # if running multiple MC Servers on same host -- each need different name
USERNAME="surferpup"                                 # Username to run Minecraft under
MCSTORE="/home/$USERNAME/UnleashedServer"       # Hard drive location of Minecraft files and world directory
RAMPATH="/dev/shm/minecraft_ramdisk"            # RamDisk location of Minecraft files and world directory
WORLD=world                                     # Name of world folder (used with MCSTORE and MCPATH)
USE_RAMDRIVE=1                                  # Use Ram Disk No = 0, Yes = 1
SCRIPTLOG="/home/$USERNAME/$SERVICENAME.cronlog"    # Log file for script messages.  Auto clened in the start script.
BACKUPPATH="/home/$USERNAME/minecraft_backups"  # Backup Directory and Path
MANUALBACKUPS=10                                # Number of manual backups to keep
HOURLYBACKUPS=24                                # Number of hourly backups to keep
DAILYBACKUPS=7                                  # Number of daily backups to keep
WEEKLYBACKUPS=4                                 # Number of weekly backups to keep
MONTHLYBACKUPS=12                               # Number of monthly backups to keep
RANDOMQUOTEFILE="/home/surferpup/ChimeTastic"   # File path of Random Quotes (Blank if none)
########################################################
### JAVA-SPECIFIC SETTINGS
########################################################
CPU_COUNT=8                                     # Number of CPU Cores (for Java Garbage Collector)
#                                               # JAVA INVVOCATION STRING
INVOCATION="java \
            -Xmx8G \
            -Xmn2G \
            -XX:PermSize=2G \
            -XX:MaxPermSize=2G \
            -XX:TargetSurvivorRatio=80 \
            -XX:MaxTenuringThreshold=31 \
            -XX:+UseParNewGC \
            -XX:ParallelGCThreads=`expr $CPU_COUNT - 1` \
            -XX:+UseConcMarkSweepGC \
            -XX:+UseGCOverheadLimit \
            -XX:+DisableExplicitGC \
            -XX:MaxGCPauseMillis=500 \
            -XX:GCPauseIntervalMillis=150 \
            -XX:+AggressiveOpts \
            -XX:+TieredCompilation \
            -XX:ReservedCodeCacheSize=2G \
            -XX:+UseCodeCacheFlushing \
            -XX:CompileThreshold=1000 \
            -XX:+UseLargePages \
            -XX:LargePageSizeInBytes=2m \
            -jar $JARFILE nogui"
########################################################
### INITIALIZE SHELL VARIABLES -- DO NOT MODIFY
########################################################
# Path to Minecraft files and world directory
if [ $USE_RAMDRIVE -eq 1 ] && [ ! -n "$OPTION" -a "$OPTION" != " " ] ; then
    MCPATH=$RAMPATH
else
    MCPATH=$MCSTORE
fi
COMMANDLINE=$@                                  # Commandline as typed by user
COMMAND=$1                                      # First commandline argument (used for function select)
OPTION=$2                                       # Second commandline argument
TO_SCREEN="screen -p 0 -S $SERVICENAME -X eval 'stuff " # Key Variable for screen session functionality
BACKUPTYPES=("hourly" "daily" "weekly" "monthly" "manual")  #Backup types allowed
DEFAULTBACKUP="manual"                          # Default Backup Type (lower case - must have directory)
WARNING_NOUN="The Server"                       # Noun for Warning Message
WARNING_VERB="rebooted"                         # Reboot/Restart warning message.
########################################################
### FORCE USER TO DESIGNATED USER (Used extensively)
########################################################
as_user() {
    if [ "`whoami`" == "$USERNAME" ] ; then
        bash -c "$1"
    else
        su - $USERNAME -c "$1"
    fi
}
########################################################
### RAMDRIVE HELPER FUNCTION -- Synchronize
########################################################
mc_ramdrivesave() {
    if [ "$USE_RAMDRIVE" == "1" ]; then
        if [ ! -f $MCPATH/$JARFILE ]; then
            echo `date +"%Y.%m.%d-%r:  Error.. Minecraft not in ramdrive"`
        else
            echo `date +"%Y.%m.%d-%r:  Saving ramdrive to disk."`
            if [ -d "$MCSTORE/$WORLD.bak" ]; then
                echo `date +"%Y.%m.%d-%r:  last $WORLD.bak still exist, crashed warning! manual check required!!!"`
                exit 1
            fi
            if [ -d "$MCSTORE/$WORLD" ]; then
                as_user "mv $MCSTORE/$WORLD $MCSTORE/$WORLD.bak"
            fi
            if mc_status; then
                #  Minecraft currently running, so save world
                as_user "$TO_SCREEN \"save-off\"\015'"
                as_user "$TO_SCREEN \"save-all\"\015'"
                as_user "rsync -r -t $MCPATH/ $MCSTORE/"
                as_user "$TO_SCREEN \"save-on\"\015'"
                echo `date +"%Y.%m.%d-%r:  Ram Drive Synchronization complete ... world save turned back on."`
            else
                # Minecraft currently not running
                echo `date +"%Y.%m.%d-%r:  Synchronizing Ram Drive, screen session closed"`
                as_user "rsync -r -t $MCPATH/ $MCSTORE/"
            fi
            if [ -d "$MCSTORE/$WORLD.bak" ]; then
                as_user "rm -r $MCSTORE/$WORLD.bak"
            fi
        fi
    else
        echo `date +"%Y.%m.%d-%r:  ramdrivesave: Ram Drive not in use."`
    fi
}
########################################################
### SERVER REBOOT
### Useage:  minecraft reboot
###          minecraft reboot now
###          minecraft reboot <backup option>
########################################################
mc_reboot_server() {
    echo `date +"%Y.%m.%d-%r:  Commencing server reboot."`
    if [ -z "$OPTION" ] || contains ; then
        if mc_status ; then
            echo `date +"%Y.%m.%d-%r:  Reboot process initated with user warnings."`
            WARNING_NOUN="The server"
            WARNING_VERB="rebooted"
            mc_warning
        fi
    else
        if [ "$OPTION" == "now" ]; then
            echo `date +"%Y.%m.%d-%r:  Reboot initated WITHOUT user warnings."`
        else
            echo ""
            echo "Bad option: $COMMANDLINE"
            echo ""
            mc_showhelp
            exit 1
        fi
    fi
    if mc_status; then
        mc_stop
    else
        echo `date +"%Y.%m.%d-%r:  Prior to reboot, $JARFILE not running."`
    fi
    if contains ; then # backup requested prior to reboot
        echo `date +"%Y.%m.%d-%r:  Prior to reboot, $(echo $OPTION | perl -ne 'print ucfirst($_)') backup requested."`
        mc_backup
    fi

    echo `date +"%Y.%m.%d-%r:  Rebooting server..."`
    as_user "reboot"
}

#######################################################
### MINECRAFT START, STOP, RESTART, STATUS, COMMAND
### Useage:  minecraft start
###          minecraft stop
###          minecraft restart
###          minecraft restart now
###          minecraft restart <backup option>
###          minecraft status
###          minecraft command <"command in quotes">
#######################################################
mc_start() {
    if mc_status; then
        echo `date +"%Y.%m.%d-%r:  Tried to start but $JARFILE was already running!"`
    else
        echo `date +"%Y.%m.%d-%r:  $JARFILE was not running... starting."`
        if [ -d $MCSTORE/$WORLD.bak ]; then
            echo `date +"%Y.%m.%d-%r:  last $WORLD.bak still exist, crashed warning! manual check required!!!"`
            exit 1
        fi
        if [[ ( ! -f "$MCPATH/$JARFILE"  || "$OPTION" == "reload" ) &&  $USE_RAMDRIVE -eq 1 ]]; then
            if [ "$OPTION" == "reload" ]; then
                echo `date +"%Y.%m.%d-%r:  Reloading Ram Drive ... Remove old drive."`
                as_user "rm -r $RAMPATH"
                echo `date +"%Y.%m.%d-%r:  Old Ram Drive removed .. reloading Ram Drive from Hard Drive..."`
            else
                    echo `date +"%Y.%m.%d-%r:  Ram drive empty...  prepping."`
                fi
            as_user "rsync -r -t $MCSTORE/ $MCPATH/"
            echo `date +"%Y.%m.%d-%r:  Ram drive prepared."`
        fi
        if [ ! -f "$MCPATH/$JARFILE" ]; then
            echo "Minecraft path $MCPATH does not contain $JARFILE.  Aborting."
            exit 1
        fi
    echo `date +"%Y.%m.%d-%r:  Cleaning Script Cron Log ... "`
    tail -1500 $SCRIPTLOG > $SCRIPTLOG$(echo tmp); mv $SCRIPTLOG$(echo tmp) $SCRIPTLOG
        cd $MCPATH
        echo "Starting Minecraft from $MCPATH/$JARFILE...."
        as_user "cd $MCPATH && screen -dmS $SERVICENAME $INVOCATION"
        sleep 7
        if mc_status; then
            echo `date +"%Y.%m.%d-%r:  $JARFILE is now running."`
        else
            echo `date +"%Y.%m.%d-%r:  Could not start $JARFILE."`
        fi
    fi
}
mc_stop() {
    if mc_status; then
        echo `date +"%Y.%m.%d-%r:  $JARFILE is running... stopping."`
        as_user "$TO_SCREEN \"say SERVER SHUTTING DOWN IN 5 SECONDS. Saving map...\"\015'"
        as_user "$TO_SCREEN \"stop\"\015'"
        sleep 10
    else
        echo `date +"%Y.%m.%d-%r:  Attempted to stop, but $JARFILE was not running."`
    fi

    if mc_status; then
        echo `date +"%Y.%m.%d-%r:  $JARFILE could not be shut down... still running."`
    else
        mc_ramdrivesave # Synchronize Ramdrive with Hardrive if in use.
        echo `date +"%Y.%m.%d-%r:  $JARFILE is shut down."`
    fi
}
mc_restart() {
    echo `date +"%Y.%m.%d-%r:  Commencing Minecraft Restart."`
    if [ -z "$OPTION" ] || contains ; then
        if mc_status ; then
            echo `date +"%Y.%m.%d-%r:  Minecraft Restart process initated with user warnings."`
            WARNING_NOUN="Minecraft"
            WARNING_VERB="restarted"
            mc_warning
        fi
    else
        if [ "$OPTION" == "now" ]; then
            echo `date +"%Y.%m.%d-%r:  Minecraft Restart process initated WITHOUT user warnings."`
        else
            echo ""
            echo "Bad option: $COMMANDLINE"
            echo ""
            mc_showhelp
            exit 1
        fi
    fi
    if mc_status; then
        mc_stop
    else
        echo `date +"%Y.%m.%d-%r:  Prior to restart, $JARFILE not running."`
    fi
    if contains ; then # backup requested prior to Minecraft restart
    echo `date +"%Y.%m.%d-%r:  Prior to restart, $(echo $OPTION | perl -ne 'print ucfirst($_)') backup requested."`
        mc_backup
    fi
    echo `date +"%Y.%m.%d-%r:  Restarting $JARFILE..."`
    mc_start
}
mc_status() {
    ps aux |grep -F -v grep|grep -F -v SCREEN|grep -F --quiet $JARFILE
    return $?
}

##########
### NOTES on mc_command:
###     Command will default to whatever the default $COMMAND variable is (usually "list")
###     Used as a helper function to "minecraft status"
###     IF you issue an invalid Minecraft Server command, the error will show up in the Minecraft Console
##########
mc_command() {
    if [ -z $OPTION]; then
        OPTION="list"
    fi
    if pgrep -u $USERNAME -f $JARFILE > /dev/null; then
        pre_log_len=`wc -l "$MCPATH/server.log" | awk '{print $1}'`
        echo `date +"%Y.%m.%d-%r:  $JARFILE is running... executing command"`
        as_user "$TO_SCREEN \"$OPTION\"\015'"
        sleep .1 # assumes that the command will run and print to the log file in less than .1 seconds
        # print output
        tail -n $[`wc -l "$MCPATH/server.log" | awk '{print $1}'`-$pre_log_len] "$MCPATH/server.log"
    fi
}

########################################################
###  Backups
########################################################
mc_backup() {
    # Check for vaild option
    BACKUPTYPE=$OPTION
    if [ -z $OPTION ]; then
        BACKUPTYPE=$DEFAULTBACKUP
    else
        if ! contains ; then # Check if allowed backup type
            echo ""
            echo "The backup type you chose ($BACKUPTYPE) is not defined."
            mc_showhelp
            exit 1
        fi
    fi
    echo `date +"%Y.%m.%d-%r:  $(echo $BACKUPTYPE | perl -ne 'print ucfirst($_)') Backup."`
    echo `date +"%Y.%m.%d-%r:  Backing up minecraft files"`
    # If using Ram Drive, synchronize Hard Drive location to Ram Drive
    if [ $USE_RAMDRIVE -ne 1 ]; then
        mc_saveoff
    else
        mc_ramdrivesave
    fi
    # On daily backups, check if day is first of month or first of week. If so, change the backup tyoe accordiningly
    if [[ ($BACKUPTYPE == "daily" || $BACKUPTYPE == "weekly") && $(echo `date +"%d"`) == 01 ]]; then
        echo `date +"%Y.%m.%d-%r:  It is the first of the month, $BACKUPTYPE changed to monthly."`
        BACKUPTYPE="monthly"
    elif [[ $BACKUPTYPE == "daily" && $(echo `date +"%u"`) == 1 ]]; then
        echo `date +"%Y.%m.%d-%r:  It is the first of the week, $BACKUPTYPE changed to weekly."`
        BACKUPTYPE="weekly"
    fi
    # Back up the world folder on the Hard Drive
    echo `date +"%Y.%m.%d-%r:  World save done, commencing $(echo $BACKUPTYPE | perl -ne 'print ucfirst($_)') Backup to $BACKUPPATH/$BACKUPTYPE."`
    as_user "tar -czPf $BACKUPPATH/$BACKUPTYPE/MCBKUP_`date +"%Y.%m.%d-%H%M%S"`.tar.gz $MCSTORE"
    if [ $USE_RAMDRIVE -ne 1 ]; then
        mc_saveon
    fi
    echo `date +"%Y.%m.%d-%r:  $(echo $BACKUPTYPE | perl -ne 'print ucfirst($_)') backup complete"`
    # Remove excess backup files (oldest first) from backup folder
    filearray=("$BACKUPPATH""/$BACKUPTYPE"/* ) #filearray will store the list of files in the directory
    numfiles=${#filearray[@]}
    maxfiles="${BACKUPTYPE^^}BACKUPS" # maxvalues = string containing name of variable for # of backups
    if [ $numfiles -gt ${!maxfiles} ]; then # Dereference maxfiles (${!maxfiles}) to get max # of backups
        REMOVED="$(echo ${filearray[@]:0:`expr $numfiles - ${!maxfiles}`})" #Dereferenced again
        echo `date +"%Y.%m.%d-%r:  Removing $REMOVED"`
        as_user "rm $REMOVED"
    else
        echo `date +"%Y.%m.%d-%r:  No backup files removed."`
    fi
    echo `date +"%Y.%m.%d-%r:  $(echo $BACKUPTYPE | perl -ne 'print ucfirst($_)') Backup complete"`
}
########################################################
### BACKUP HELPER FUNCTIONS
########################################################
contains() {
    for element in "${BACKUPTYPES[@]}"
    do
        if [ $element == "$OPTION" ] ; then
            return 0
        fi
    done
    return 1
}
mc_saveoff() {
    if mc_status; then
        echo `date +"%Y.%m.%d-%r:  $JARFILE is running... suspending saves"`
        as_user "$TO_SCREEN \"say SERVER BACKUP STARTING. Server going readonly...\"\015'"
        as_user "$TO_SCREEN \"save-off\"\015'"
        sleep .1
        as_user "$TO_SCREEN \"save-all\"\015'"
        sleep 10
    else
        echo `date +"%Y.%m.%d-%r:  $JARFILE was not running. Not suspending saves."`
    fi
}
mc_saveon() {
    if mc_status; then
        echo `date +"%Y.%m.%d-%r:  $JARFILE is running... re-enabling saves"`
        as_user "$TO_SCREEN \"save-on\"\015'"
        as_user "$TO_SCREEN \"say SERVER BACKUP ENDED. Server going read-write...\"\015'"
        echo `date +"%Y.%m.%d-%r:  $JARFILE is running... world save turned back on."`
    else
        echo `date +"%Y.%m.%d-%r:  $JARFILE was not running. Not resuming saves."`
    fi
}
########################################################
### Hourly Chime (Optional Backup)
########################################################
mc_chime() {
    local MESSAGE_WORD="without"
    if contains; then
        MESSAGE_WORD="with $(echo $BACKUPTYPE | perl -ne 'print ucfirst($_)')"
    else
        if [ ! -z $OPTION ]; then
            echo ""
            echo "Bad option: $COMMANDLINE"
            echo ""
            mc_showhelp
            exit 1
        fi
    fi
    echo `date +"%Y.%m.%d-%r:  Hourly Chime $MESSAGE_WORD Backup."`
    as_user "$TO_SCREEN \"say ---------------------------------------\"\015'"
    as_user "$TO_SCREEN \"say The server time is `date +"%r CST"`.\"\015'"
    as_user "$TO_SCREEN \"say Hourly Chime Annoyance Lessification complete.\"\015'"
    as_user "$TO_SCREEN \"say NOTE:  The Mining World will be respawned.\"\015'"
    as_user "$TO_SCREEN \"say PLEASE REMOVE YOUR ITEMS FROM MINING WORLD BY SUNDAY!!!\"\015'"
    as_user "$TO_SCREEN \"say ---------------------------------------\"\015'"
    sleep .1
    as_user "$TO_SCREEN \"list\"\015'"

    if contains ; then
        mc_backup
    fi
}
########################################################
### Blurt out random Quote from Quote File (if it exists)
########################################################
mc_quote() {
    if [ -f "$RANDOMQUOTEFILE" ] ; then
        as_user "$TO_SCREEN \"say RANDOM THOUGHT:\"\015'"
    sleep .1
    RANDOMTHOUGHT=$(shuf -n 1 $RANDOMQUOTEFILE)
    echo "$RANDOMTHOUGHT"
        as_user "$TO_SCREEN \"say $RANDOMTHOUGHT\"\015'"
    sleep .1
    else
        echo `date +"%Y.%m.%d-%r:  There is not quotefile at $RANDOMQUOTEFILE"`
    fi
}
########################################################
### Server Reboot/Restart Warning Message
########################################################
mc_warning() {
    as_user "$TO_SCREEN \"say $WARNING_NOUN will be $WARNING_VERB in 30 minutes. Please plan your excursions accordingly.\"\015'"
    sleep 10m
    as_user "$TO_SCREEN \"say $WARNING_NOUN will be $WARNING_VERB in 20 minutes. You will be logged off when this happens.\"\015'"
    sleep 10m
    as_user "$TO_SCREEN \"say $WARNING_NOUN will be $WARNING_VERB in 10 minutes  Dig Beauford!!  Dig!!!!!!.\"\015'"
    sleep 5m
    as_user "$TO_SCREEN \"say $WARNING_NOUN will be $WARNING_VERB in 5 minutes.  The server will be down while the backup completes.\"\015'"
    sleep 3m
    as_user "$TO_SCREEN \"say $WARNING_NOUN will be $WARNING_VERB in 2 minutes  Please log out soon.\"\015'"
    sleep 1m
    as_user "$TO_SCREEN \"say $WARNING_NOUN will be $WARNING_VERB in 1 minute.\"\015'"
    as_user "$TO_SCREEN \"say $WARNING_NOUN will come back when the process completes.  Please give it about 2 minutes.\"\015'"
    sleep 30
    as_user "$TO_SCREEN \"say 30 SECONDS TILL ${WARNING_NOUN^^} WILL BE ${WARNING_VERB} ...\"\015'"
    sleep 15
    as_user "$TO_SCREEN \"say 15 SECONDS TILL ${WARNING_NOUN^^} WILL BE ${WARNING_VERB} ...\"\015'"
    sleep 5
    as_user "$TO_SCREEN \"say 10 SECONDS TILL ${WARNING_NOUN^^} WILL BE ${WARNING_VERB} ...\"\015'"
    sleep 5
    as_user "$TO_SCREEN \"say 5 SECONDS TILL ${WARNING_NOUN^^} WILL BE ${WARNING_VERB} ...\"\015'"
    sleep 1
    as_user "$TO_SCREEN \"say 4 SECONDS TILL ${WARNING_NOUN^^} WILL BE ${WARNING_VERB} ...\"\015'"
    sleep 1
    as_user "$TO_SCREEN \"say 3 SECONDS TILL ${WARNING_NOUN^^} WILL BE ${WARNING_VERB} ...\"\015'"
    sleep 1
    as_user "$TO_SCREEN \"say 2 SECONDS TILL ${WARNING_NOUN^^} WILL BE ${WARNING_VERB} ...\"\015'"
    sleep 1
    as_user "$TO_SCREEN \"say 1 SECONDS TILL ${WARNING_NOUN^^} WILL BE ${WARNING_VERB} ...\"\015'"
    sleep 1
}
########################################################
### Help Text
########################################################
mc_showhelp() {
    ME=`basename $0` # The name of this script
    DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )" # the path of this script
    echo ""
    echo "Usage: $DIR/$ME <command> <option>"
    echo ""
    echo "Command <option>         Description"
    echo "----------------         -------------------------------------------------------------------"
    echo "start <option>           Start Minecraft. Option \"reload\" will recreate the RamDrive."
    echo "                           ex.  minecraft start"
    echo "                                minecraft start reload"
    echo "stop                     Stop Minecraft gracefully."
    echo "restart <option>         Restart Minecraft gracefully with backup and 30 minute user warning."
    echo "                           ex.  minecraft restart"
    echo "                                minecraft restart now   (Skips warning)"
    echo "                                minecraft restart daily (or any backup type) -- backup and restart."

    echo "reboot <option>          Reboots server gracefully with backup and 30 minute user warning."
    echo "                           ex.  minecraft reboot"
    echo "                                minecraft reboot now  (Skips warning)"
    echo "status                   Shows status of server and list of current players."
    echo "command <option>         Execute any minecraft server comand (option in \"\")."
    echo "                           ex.  minecraft command \"say Hello World!\""
    echo "                                default option = \"list\""
    echo "backup <option>          Backup the world file to $BACKUPPATH with the following options:"
    for element in "${BACKUPTYPES[@]}"
    do
    echo "                                $element (backup to $BACKUPPATH/$element)"
    done
    echo "                                default option is $DEFAULTBACKUP"
    echo "                           NOTE:  Backups DO NOT cause a Minecraft restart.."
    echo "chime <option>           Print the Chime message.  Can also execute any backup type."
    echo "                           ex.  minecraft chime"
    echo "                                minecraft chime hourly (or any backup type)"
    echo "ramdrivesave             Force ramdisk to synch to hard drive world folder."
    echo "--------------"
    echo "          Script $ME stored in $DIR.  Use \"sudo nano $DIR/$ME\" to edit."
    echo ""
}
########################################################
### COMMAND LINE ARGUMENTS
########################################################
case "$COMMAND" in
    start)
        mc_start
        ;;
    stop)
        mc_stop
        ;;
    restart)
        mc_restart
        ;;
    reboot)
        mc_reboot_server
        ;;
    status)
        if mc_status; then
            echo "Minecraft is running from $MCPATH/$JARFILE."
            mc_command
        else
            echo `date +"%Y.%m.%d-%H:  $JARFILE is not running."`
        fi
        ;;
    command)
        mc_command
        ;;
    backup)
        mc_backup
        ;;
    ramdrivesave)
        mc_ramdrivesave
        ;;
    chime)
        mc_chime
        ;;
    quote)
        mc_quote
        ;;
    ?)
        mc_showhelp
        exit 1
        ;;
    *)
        mc_showhelp
        exit 1
        ;;
esac