Sandboxing in Lua 5.2
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- Subject: Sandboxing in Lua 5.2
- From: Alexander Gladysh <agladysh@...>
- Date: Sat, 7 May 2011 12:21:51 +0400
Hi, list!
I apologize for being lazy, but can someone please summarize for me,
how environment sandboxing is to be done in 5.2? (I assume that
nothing is changed for CPU and memory sandboxing.)
In my code I heavily rely on the following pattern (pseudocode):
-- users_code.lua
foo()
bar()
baz = true
return 42
-- system_code.lua
local do_in_environment = function(chunk, env)
arguments(
"function", chunk,
"table", env
)
setfenv(chunk, env)
return xpcall(chunk, debug.traceback)
end
local env = -- Whitelist
{
foo = foo;
bar = bar;
}
local ok, result = assert(
do_in_environment(
assert(loadfile("users_code.lua")),
env
)
)
print(result, env.baz)
Thanks,
Alexander.