-- Set up table(s)
    local jails = {}

-- Load jail positions
    local savefile  = io.open(minetest.get_worldpath() .. "/jails.data","r")
    local getjails  = savefile:read("*a")
    jails   = minetest.deserialize(getjails)
    savefile:close()
    getjails = nil

-- Register command for admin which allows him to create a new jail position
    minetest.register_chatcommand("createjail", {
    params = "",
    description = "Create a new jail position",
    privs   = {admin=true},
    func = function(name, param)
        local admin = minetest.get_player_by_name(name)
        local pos   = admin:getpos()
        local raw   = {
            position    = pos,
            player  = false
        }
        table.insert(jails, raw)
        local prepare4save  = minetest.serialize(jails)
        local savefile  = io.open(minetest.get_worldpath() .. "/jails.data","w")
        savefile:write(prepare4save)
        savefile:close()
    end
})