adding an event on reading environment variable from /proc files

Signed-off-by: h4l0gen <[email protected]>

final

Signed-off-by: h4l0gen <[email protected]>

events/syscall/read_environment_variable_fromm_proc.go

@@ -0,0 +1,36 @@
+// SPDX-License-Identifier: Apache-2.0
+/*
+Copyright (C) 2024 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 syscall
+
+import (
+	"os/exec"
+
+	"github.com/falcosecurity/event-generator/events"
+)
+
+var _ = events.Register(
+	ReadEnvironmentVariableFromProcFiles,
+	events.WithDisabled(), // this rule is not included in falco_rules.yaml (stable rules), so disable the action
+)
+
+func ReadEnvironmentVariableFromProcFiles(h events.Helper) error {
+	if h.InContainer() {
+		cmd := exec.Command("cat", "/proc/self/environ")
+		err := cmd.Run()
+		if err != nil {
+			return err
+		}
+	}
+	return nil
+}