How to execute an untrusted Lua file in its own environment from the C API

Question

I want to execute an untrusted .lua file in its own environment by calling lua_setfenv() so that it cannot affect any of my code.

The documentation for that function tho

Answer 1

luaL_loadfile() will load the chunk, then call lua_setfenv() to set the environment table, then call lua_pcall() to execute the chunk. See recent answer given by Judge Maygarden at Calling lua functions from .lua's using handles?