update(events/helper): add the DoNothing helper

It can be used together with SpawnAs helper function when
we just need to test execve events, cmdlines arguments and
so on.

Signed-off-by: Lorenzo Susini <[email protected]>

events/helper/do_nothing.go

@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: Apache-2.0
+/*
+Copyright (C) 2023 The Falco Authors.
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+    http://www.apache.org/licenses/LICENSE-2.0
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package helper
+
+import (
+	"github.com/falcosecurity/event-generator/events"
+)
+
+var _ = events.Register(DoNothing)
+
+// DoNothing does nothing.
+// It can be used to just test execve events or command line arguments
+// when using the helper function SpawnAs.
+func DoNothing(h events.Helper) error {
+	h.Log().Info("DoNothing helper")
+	return nil
+}