1 files changed, 0 insertions, 275 deletions
diff --git a/advtrains/advtrains_luaautomation/environment.lua b/advtrains/advtrains_luaautomation/environment.lua
deleted file mode 100644
index 0b25e87..0000000
--- a/advtrains/advtrains_luaautomation/environment.lua
+++ /dev/null
@@ -1,275 +0,0 @@
--------------
--- lua sandboxed environment
-
--- function to cross out functions and userdata.
--- modified from dump()
-function atlatc.remove_invalid_data(o, nested)
-	if o==nil then return nil end
-	local valid_dt={["nil"]=true, boolean=true, number=true, string=true}
-	if type(o) ~= "table" then
-		--check valid data type
-		if not valid_dt[type(o)] then
-			return nil
-		end
-		return o
-	end
-	-- Contains table -> true/nil of currently nested tables
-	nested = nested or {}
-	if nested[o] then
-		return nil
-	end
-	nested[o] = true
-	for k, v in pairs(o) do
-		v = atlatc.remove_invalid_data(v, nested)
-	end
-	nested[o] = nil
-	return o
-end
-
-
-local env_proto={
-	load = function(self, envname, data)
-		self.name=envname
-		self.sdata=data.sdata and atlatc.remove_invalid_data(data.sdata) or {}
-		self.fdata={}
-		self.init_code=data.init_code or ""
-		self.step_code=data.step_code or ""
-	end,
-	save = function(self)
-		-- throw any function values out of the sdata table
-		self.sdata = atlatc.remove_invalid_data(self.sdata)
-		return {sdata = self.sdata, init_code=self.init_code, step_code=self.step_code}
-	end,
-}
-
---Environment
---Code modified from mesecons_luacontroller (credit goes to Jeija and mesecons contributors)
-
-local safe_globals = {
-	"assert", "error", "ipairs", "next", "pairs", "select",
-	"tonumber", "tostring", "type", "unpack", "_VERSION"
-}
-
---print is actually minetest.chat_send_all()
---using advtrains.print_concat_table because it's cool
-local function safe_print(t, ...)
-	local str=advtrains.print_concat_table({t, ...})
-	minetest.log("action", "[atlatc] "..str)
-	minetest.chat_send_all(str)
-end
-
-local function safe_date()
-	return(os.date("*t",os.time()))
-end
-
--- string.rep(str, n) with a high value for n can be used to DoS
--- the server. Therefore, limit max. length of generated string.
-local function safe_string_rep(str, n)
-	if #str * n > 2000 then
-		debug.sethook() -- Clear hook
-		error("string.rep: string length overflow", 2)
-	end
-
-	return string.rep(str, n)
-end
-
--- string.find with a pattern can be used to DoS the server.
--- Therefore, limit string.find to patternless matching.
--- Note: Disabled security since there are enough security leaks and this would be unneccessary anyway to DoS the server
-local function safe_string_find(...)
-	--if (select(4, ...)) ~= true then
-	--	debug.sethook() -- Clear hook
-	--	error("string.find: 'plain' (fourth parameter) must always be true for security reasons.")
-	--end
-
-	return string.find(...)
-end
-
-local mp=minetest.get_modpath("advtrains_luaautomation")
-local p_api_getstate, p_api_setstate = dofile(mp.."/passive.lua")
-
-local static_env = {
-	--core LUA functions
-	print = safe_print,
-	string = {
-		byte = string.byte,
-		char = string.char,
-		format = string.format,
-		len = string.len,
-		lower = string.lower,
-		upper = string.upper,
-		rep = safe_string_rep,
-		reverse = string.reverse,
-		sub = string.sub,
-		find = safe_string_find,
-	},
-	math = {
-		abs = math.abs,
-		acos = math.acos,
-		asin = math.asin,
-		atan = math.atan,
-		atan2 = math.atan2,
-		ceil = math.ceil,
-		cos = math.cos,
-		cosh = math.cosh,
-		deg = math.deg,
-		exp = math.exp,
-		floor = math.floor,
-		fmod = math.fmod,
-		frexp = math.frexp,
-		huge = math.huge,
-		ldexp = math.ldexp,
-		log = math.log,
-		log10 = math.log10,
-		max = math.max,
-		min = math.min,
-		modf = math.modf,
-		pi = math.pi,
-		pow = math.pow,
-		rad = math.rad,
-		random = math.random,
-		sin = math.sin,
-		sinh = math.sinh,
-		sqrt = math.sqrt,
-		tan = math.tan,
-		tanh = math.tanh,
-	},
-	table = {
-		concat = table.concat,
-		insert = table.insert,
-		maxn = table.maxn,
-		remove = table.remove,
-		sort = table.sort,
-	},
-	os = {
-		clock = os.clock,
-		difftime = os.difftime,
-		time = os.time,
-		date = safe_date,
-	},
-	POS = function(x,y,z) return {x=x, y=y, z=z} end,
-	getstate = p_api_getstate,
-	setstate = p_api_setstate,
-	--interrupts are handled per node, position unknown.
-	--however external interrupts can be set here.
-	interrupt_pos = function(pos, imesg)
-		if not type(pos)=="table" or not pos.x or not pos.y or not pos.z then
-			debug.sethook()
-			error("Invalid position supplied to interrupt_pos")
-		end
-		atlatc.interrupt.add(0, pos, {type="ext_int", ext_int=true, message=imesg})
-	end,
-}
-
-for _, name in pairs(safe_globals) do
-	static_env[name] = _G[name]
-end
-
-
---The environment all code calls get is a table that has set static_env as metatable.
---In general, every variable is local to a single code chunk, but kept persistent over code re-runs. Data is also saved, but functions and userdata and circular references are removed
---Init code and step code's environments are not saved
--- S - Table that can contain any save data global to the environment. Will be saved statically. Can't contain functions or userdata or circular references.
--- F - Table global to the environment, can contain volatile data that is deleted when server quits.
---     The init code should populate this table with functions and other definitions.
-
-local proxy_env={}
---proxy_env gets a new metatable in every run, but is the shared environment of all functions ever defined.
-
--- returns: true, fenv if successful; nil, error if error 
-function env_proto:execute_code(localenv, code, evtdata, customfct)
-	local metatbl ={
-		__index = function(t, i)
-			if i=="S" then
-				return self.sdata
-			elseif i=="F" then
-				return self.fdata
-			elseif i=="event" then
-				return evtdata
-			elseif customfct and customfct[i] then
-				return customfct[i]
-			elseif localenv and localenv[i] then
-				return localenv[i]
-			end
-			return static_env[i]
-		end,
-		__newindex = function(t, i, v)
-			if i=="S" or i=="F" or i=="event" or (customfct and customfct[i]) or static_env[i] then
-				debug.sethook()
-				error("Trying to overwrite environment contents")
-			end
-			localenv[i]=v
-		end,
-	}
-	setmetatable(proxy_env, metatbl)
-	local fun, err=loadstring(code)
-	if not fun then
-		return false, err
-	end
-	
-	setfenv(fun, proxy_env)
-	local succ, data = pcall(fun)
-	if succ then
-		data=localenv
-	end
-	return succ, data
-end
-
-function env_proto:run_initcode()
-	if self.init_code and self.init_code~="" then
-		local old_fdata=self.fdata
-		self.fdata = {}
-		atprint("[atlatc]Running initialization code for environment '"..self.name.."'")
-		local succ, err = self:execute_code({}, self.init_code, {type="init", init=true})
-		if not succ then
-			atwarn("[atlatc]Executing InitCode for '"..self.name.."' failed:"..err)
-			self.init_err=err
-			if old_fdata then
-				self.fdata=old_fdata
-				atwarn("[atlatc]The 'F' table has been restored to the previous state.")
-			end
-		end
-	end
-end
-function env_proto:run_stepcode()
-	if self.step_code and self.step_code~="" then
-		local succ, err = self:execute_code({}, self.step_code, nil, {})
-		if not succ then
-			--TODO
-		end
-	end
-end
-
---- class interface
-
-function atlatc.env_new(name)
-	local newenv={
-		name=name,
-		init_code="",
-		step_code="",
-		sdata={}
-	}
-	setmetatable(newenv, {__index=env_proto})
-	return newenv
-end
-function atlatc.env_load(name, data)
-	local newenv={}
-	setmetatable(newenv, {__index=env_proto})
-	newenv:load(name, data)
-	return newenv
-end
-
-function atlatc.run_initcode()
-	for envname, env in pairs(atlatc.envs) do
-		env:run_initcode()
-	end
-end
-function atlatc.run_stepcode()
-	for envname, env in pairs(atlatc.envs) do
-		env:run_stepcode()
-	end
-end
-
-
-
-