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init.lua
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init.lua
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local modname = minetest.get_current_modname()
local modpath = minetest.get_modpath(modname)
local thismod = {
enabled = false,
}
_G[modname] = thismod
function thismod.mklog(level, modname)
return function(str)
minetest.log(level, "[" .. modname .. "] " .. str)
end
end
local LogI = thismod.mklog('action', modname)
local LogE = thismod.mklog('error', modname)
local singleplayer = minetest.is_singleplayer() -- Caching is OK since you can't open a game to
-- multiplayer unless you restart it.
if minetest.settings:get(modname .. '.enable_singleplayer') ~= 'true' and singleplayer then
LogI("Not enabling because of singleplayer game")
return
end
thismod.enabled = true
local function setoverlay(tab, orig)
local mt = getmetatable(tab) or {}
mt.__index = function (tab, key)
if rawget(tab, key) ~= nil then
return rawget(tab, key)
else
return orig[key]
end
end
setmetatable(tab, mt)
end
local insecrequire = _G.require
local ffi, bit
do
if minetest.request_insecure_environment then
insecrequire = minetest.request_insecure_environment().require
LogI("Fetched require() from insecure env")
end
local test_fn = function()
return { require('ffi'), require('bit') }
end
local env = { require = insecrequire }
setoverlay(env, _G)
setfenv(test_fn, env)
local ffi_ok, ret = pcall(test_fn)
if not ffi_ok then
error("Cannot access LuaJIT FFI. Either you are not using LuaJIT, or mod security is enabled" ..
" and mysql_base is not an exception.")
end
ffi, bit = unpack(ret)
end
local function string_splitdots(s)
local temp = {}
local index = 0
local last_index = string.len(s)
while true do
local i, e = string.find(s, '%.', index)
if i and e then
local next_index = e + 1
local word_bound = i - 1
table.insert(temp, string.sub(s, index, word_bound))
index = next_index
else
if index > 0 and index <= last_index then
table.insert(temp, string.sub(s, index, last_index))
elseif index == 0 then
temp = nil
end
break
end
end
return temp
end
local mysql
do -- MySQL module loading
local env = {}
setoverlay(env, _G)
local function secexec(path)
local fn, msg = loadfile(path)
if not fn then error(msg) end
setfenv(fn, env)
local status, ret = pcall(fn, {})
if not status then
error(ret)
end
return ret
end
local function secrequire(module)
if module == 'mysql_h' then
return secexec(modpath .. '/mysql/mysql_h.lua')
elseif module == 'ffi' then
return ffi
elseif module == 'bit' then
return bit
else
error("mysql.lua tried to require('" .. module .. "')")
end
end
env.require = secrequire
local status
status, mysql = pcall(secexec, modpath .. '/mysql/mysql.lua')
if not status then
error(modname .. ' failed to load MySQL FFI interface: ' .. tostring(mysql))
end
thismod.mysql = mysql
end
function thismod.mkget(modname)
local get
if minetest.settings then
get = function (name) return minetest.settings:get(modname .. '.' .. name) end
else
get = function (name) return minetest.setting_get(modname .. '.' .. name) end
end
local cfgfile = get('cfgfile')
if type(cfgfile) == 'string' and cfgfile ~= '' then
local file = io.open(cfgfile, 'rb')
if not file then
error(modname .. ' failed to load specified config file at ' .. cfgfile)
end
local cfg, msg = minetest.deserialize(file:read('*a'))
file:close()
if not cfg then
error(modname .. ' failed to parse specified config file at ' .. cfgfile .. ': ' .. msg)
end
get = function (name)
if type(name) ~= 'string' or name == '' then
return nil
end
local parts = string_splitdots(name)
if not parts then
return cfg[name]
end
local tbl = cfg[parts[1]]
for n = 2, #parts do
if tbl == nil then
return nil
end
tbl = tbl[parts[n]]
end
return tbl
end
end
return get
end
local get = thismod.mkget(modname)
do
local conn, dbname
-- MySQL API backend
mysql.config(get('db.api'))
local connopts = get('db.connopts')
if (get('db.db') == nil) and (type(connopts) == 'table' and connopts.db == nil) then
error(modname .. ": missing database name parameter")
end
if type(connopts) ~= 'table' then
connopts = {}
-- Traditional connection parameters
connopts.host, connopts.user, connopts.port, connopts.pass, connopts.db =
get('db.host') or 'localhost', get('db.user'), get('db.port'), get('db.pass'), get('db.db')
end
connopts.charset = 'utf8'
connopts.options = connopts.options or {}
connopts.options.MYSQL_OPT_RECONNECT = true
conn = mysql.connect(connopts)
dbname = connopts.db
LogI("Connected to MySQL database " .. dbname)
thismod.conn = conn
thismod.dbname = dbname
-- LuaPower's MySQL interface throws an error when the connection fails, no need to check if
-- it succeeded.
-- Ensure UTF-8 is in use.
-- If you use another encoding, kill yourself (unless it's UTF-32).
conn:query("SET NAMES 'utf8'")
conn:query("SET CHARACTER SET utf8")
conn:query("SET character_set_results = 'utf8', character_set_client = 'utf8'," ..
"character_set_connection = 'utf8', character_set_database = 'utf8'," ..
"character_set_server = 'utf8'")
local set = function(setting, val) conn:query('SET ' .. setting .. '=' .. val) end
pcall(set, 'wait_timeout', 3600)
pcall(set, 'autocommit', 1)
pcall(set, 'max_allowed_packet', 67108864)
end
local function ping()
if thismod.conn then
if not thismod.conn:ping() then
LogE('error', modname .. ": failed to ping database")
end
end
minetest.after(1800, ping)
end
minetest.after(10, ping)
local shutdown_callbacks = {}
function thismod.register_on_shutdown(func)
table.insert(shutdown_callbacks, func)
end
minetest.register_on_shutdown(function()
if thismod.conn then
LogI("Shutting down, running callbacks")
for _, func in ipairs(shutdown_callbacks) do
func()
end
thismod.conn:close()
thismod.conn = nil
LogI("Closed database connection")
end
end)
function thismod.table_exists(name)
thismod.conn:query("SHOW TABLES LIKE '" .. name .. "'")
local res = thismod.conn:store_result()
local exists = (res:row_count() ~= 0)
res:free()
return exists
end
dofile(modpath .. '/abstraction.lua')