Minecraft Backup

minecraft-backup.sh

#!/bin/sh

: ${MINECRAFT_WORLD="survival"}

src="/srv/${MINECRAFT_WORLD}/world"
dst="/var/games/minecraft/${MINECRAFT_WORLD}.txz"

send_command() {
    world=$1
    cmd=$2

    # Send the command to the tmux session.
    /usr/local/bin/tmux send-keys -t ${world} "${cmd}" C-m
}

save_off() {
    world=$1
    send_command ${world} "save-off"
}

save_on() {
    world=$1
    send_command ${world} "save-on"
}

save_all() {
    world=$1
    send_command ${world} "save-all"
}

archive() {
    src=$1
    dst=$2
    tmp="/tmp/$(basename ${dst})"

    # Create the archive at a temporary location first to minimize
    # inconsistencies stemming from access when the new archive is being
    # written.
    /usr/bin/tar -a -cf ${tmp} ${src}
    /bin/mv ${tmp} ${dst}
}


# Turn off world auto-saving.
save_off ${MINECRAFT_WORLD}

# Save the world.
save_all ${MINECRAFT_WORLD}

# Archive the world.
archive ${src} ${dst}

# Turn on world auto-saving.
save_on ${MINECRAFT_WORLD}