tmux Minecraft start, stop, restart, reload and backup script

start.sh

#!/bin/sh
### BEGIN INIT INFO
# Provides:          Minecraft-Server
# Required-Start:    $all
# Required-Stop:     $remote_fs $syslog $network
# Default-Start:     2 3 4 5
# Default-Stop:      0 1 6
# Short-Description: Starts minecraft server at boot time
# Description:       Starts minecraft server at boot time
### END INIT INFO

#dir which contains the server directory
user=your_user
basedir=/home/$user/
backup_path="/home/$user/backups/"
folder_name=$(date +%Y-%m-%d_%H-%M-%S)
world=world

#tmux session name (`basename \"$basedir\"` -> basedir's name)
session="`basename \"$basedir\"`"

if [[ basedir != */ ]]
then
   basedir+="/"
fi

start() {
    tmux new-session -d -s $session
    
    echo "Starting server"
    
    tmux send-keys -t $session:0 "cd $basedir" C-m
    tmux send-keys -t $session:0 "bash startup.sh" C-m
    
    echo "Server started. Attaching session..."
    
    sleep 0.5
    
    tmux attach-session -t $session:0
}

stop() {
    tmux send-keys -t $session:0 "/say Server restarting in 5 minutes. Please get ready to log off." Enter

    # Wait for 1770 seconds (29 minutes and 30 seconds)
    # sleep 300s
    sleep 10s

    tmux send-keys -t $session:0 "stop" C-m
    echo "Stopping server..."
    
    for i in {5..1..-1}
    do
        echo -ne "\rWaiting for shutdown... $i"
        sleep 1
    done
    echo ""
    echo "Killing tmux session"
    tmux kill-session -t $session
    echo "Server stopped"
}

backup() {
    echo "Will start backup from $basedir to $backup_path/$folder_name..."
    echo "Saving the game..."

    tmux send-keys -t $session "/say Beep boop, backup starting..." Enter
    tmux send-keys -t $session "save-off" Enter
    tmux send-keys -t $session "save-all" Enter
    sleep 30

    echo "Copying the files..."
    tmux send-keys -t $session "/say Beep boop, save the world..." Enter
    cp -r $basedir/$world/ $backup_path/$folder_name/

    echo "Removing the old backups..."
    if [ $(ls $backup_path | wc -l) -gt 10 ]
    then
            echo "Remove 1 oldest backup..."
            rm "$backup_path/$(ls $backup_path -t | tail -1)" -rf
    fi

    tmux send-keys -t $session "save-on" Enter
    tmux send-keys -t $session "/say Beep boop, backup finished!" Enter
    echo "Backup success!"
}

reload() {
    tmux send-keys -t $session:0 "stop" C-m
    echo "Stopping server..."
    
    for i in {5..1..-1}
    do
        echo -ne "\rWaiting for shutdown... $i"
        sleep 1
    done
    echo ""
    echo "Killing tmux session"
    tmux kill-session -t $session
    echo "Server stopped"
}

case "$1" in
start)
    start
;;
stop)
    stop
;;
attach)
    tmux attach -t $session
;;
restart)
    backup
    sleep 10
    stop
    sleep 0.8
    echo "Restarting server..."
    sleep 0.8
    start
;;
reload)
    stop
    sleep 0.8
    echo "Reload server..."
    sleep 0.8
    start
;;
*)
echo "Usage: start.sh (start|stop|backup|restart|reload|attach)"
;;
esac

Thanks to @Jofkos and his script:
https://gist.github.com/Jofkos/86a4936c91999082d6a7

Hi @joelouisworthington I'm also using tmux to run my minecraft server and have something similar to yours with

tmux send-keys -t "$TMUX_SESSION" "say server is stopping in 5 secs immediately" C-m
sleep 5
tmux send-keys -t "$TMUX_SESSION" "stop" C-m

sleep 10

tmux kill-session -t "$TMUX_SESSION"

like you I also placed a sleep in between sending the stop command and killing the tmux session. I'm wondering if there's any issues with the possibility of killing the tmux session before the minecraft server stops fully