override

local obj = {test = function() print("test") end}
local copy = function(t) local tt = {} for k,v in pairs(t) do tt[k]=v end return tt end
local newEnv = copy(_G)
obj = setmetatable({},{__index=obj,__newindex=function(a,b,c) error("nope",0) end, __metatable = false})
newEnv["object"] = obj
newEnv = setmetatable({},{__index=newEnv,__newindex=function(a,b,c) error("nope",0) end, __metatable=false})
local func = loadfile("/rom/programs/shell")
setfenv(func,newEnv)
func()