Best way to omit Lua standard libraries?

Question

What is the best way to remove or omit a Lua standard library package? For example remove the os library functions in a particular environment. The project in question is

Answer 1

Let's say you only want to open the base and package libraries. In Lua 5.2, the most concise way is

luaL_requiref(L, "_G", luaopen_base, 1);
luaL_requiref(L, "package", luaopen_package, 1);
lua_pop(L, 2);

This is how the luaL_openlibs function in linit.c works, except that it loads everything.