delete some io.* writing functions

com/_prepare.lua

@@ -2,15 +2,3 @@
 package.path = package.path .. ";/usr/lib64/lua/5.1/?.lua;/usr/local/share/lua/5.1/?.lua" .. ";./com/?.lua;"
 package.cpath = package.cpath .. ";/usr/lib64/lua/5.1/?.so;/usr/local/lib/lua/5.1/?.so"
 
-print = function() end
-io.write = function(...) end
-io.stdout = function() return nil end
-io.stderr = function() return nil end
-io.read = function(...) return nil end
-
----@type table<string, any>
-Status = {
-	ok = "ok",
-	error = "error",
-	invalid = "invalid",
-}

internal/server/sv1/lua_handler.go

@@ -46,6 +46,18 @@ func (h *HandlerV1) handleLUA(sid string, r *http.Request, req *rpc.RPCRequest,
 	L := lua.NewState()
 	defer L.Close()
 
+	ioMod := L.GetGlobal("io").(*lua.LTable)
+	for _, k := range []string{"write", "output", "flush", "read", "input"} {
+		ioMod.RawSetString(k, lua.LNil)
+	}
+
+	for _, name := range []string{"stdout", "stderr", "stdin"} {
+	stream := ioMod.RawGetString(name)
+	if t, ok := stream.(*lua.LUserData); ok {
+			t.Metatable = lua.LNil
+		}
+	}
+	
 	seed := rand.Int()
 
 	loadSessionMod := func(L *lua.LState) int {