Re: Simple Lua for scripts
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- Subject: Re: Simple Lua for scripts
- From: Romulo Bahiense <romulo@...>
- Date: 2005年8月22日 18:18:47 -0300
Perhaps you are looking for something like:
-- begin of code
-- userCode should be the user script, loaded from somewhere
local userCode = [[
a = 5
b = 3
someFunction()
for i=1,10 do anotherFunction(i) end
math.sin = 'my own evil string'
string.find = 'another one'
]]
local protectedEnv = {
anotherFunction = print,
someFunction = function() print 'Yeah' end,
math = {sin = math.sin, log = math.log, min = math.min, max =
math.max},
string = {find = string.find, sub=string.sub, ....},
....
}
local f,err = loadstring(userCode)
if not f then -- syntax error
error(err)
end
setfenv(f, protectedEnv)
f()
> yeah
> 1
> 2
> 3
> 4
> ...
> 10
print(protectedEnv.a,protectedEnv.b, protectedEnv.math.sin,
protectedEnv.string.find, math.sin, string.find)
> 5 3 my own evil string another one function: ... function: ...
-- end of code
PS: This code is untested ;)
--rb