Function init_sys_funcs

lua/syssp.c:762–769

We call this while creating new globals is disabled (because we only want to * expose these functions for SPs in the _SP.sys namespace). Use raw writes to * avoid triggering the metatable methods that block it. */

 * expose these functions for SPs in the _SP.sys namespace). Use raw writes to 
 * avoid triggering the metatable methods that block it. */
void init_sys_funcs(Lua L) {
    lua_getglobal(L, "_G");
    lua_pushstring(L, "sys");
    lua_newtable(L);
    luaL_openlib(L, NULL, sys_funcs, 0);
    lua_rawset(L, -3);
    lua_pop(L, 1);
}