chore(pkg/driver/kernel): moved driverkernel FetchInfo to linux only …

…version.

Moreover, added a version for others OS.

Signed-off-by: Federico Di Pierro <[email protected]>

pkg/driver/kernel/kernel.go → pkg/driver/kernel/kernel_linux.go

@@ -13,6 +13,8 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
+//go:build linux
+
 // Package driverkernel implements the kernel info fetching helpers.
 package driverkernel
 

pkg/driver/kernel/kernel_others.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.
+
+//go:build !linux
+
+package driverkernel
+
+import (
+	"errors"
+
+	"github.com/falcosecurity/driverkit/pkg/kernelrelease"
+)
+
+// FetchInfo returns information about currently running kernel.
+func FetchInfo(_, _ string) (kernelrelease.KernelRelease, error) {
+	return kernelrelease.KernelRelease{}, errors.New("unsupported")
+}