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Yes I have read it. The point being just run an env without them.

But that only applies to doing it from lua, not doing it from c/c++. Within the application itself.

On 4/19/2012 7:34 PM, Patrick Rapin wrote:
How can I run a safe sandbox from within a c/c++ application?
This is a very complex question, going far beyond setting "io" to nil.
You must begin to read that document [1], and probably others too.

For your specific question, instead of calling the default
luaL_openlibs, provide your version of it.
It is easier than "unregistering" libraries thereafter.