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Etienne PerotandgVisor bot
fea639ce00
This change adds a configuration option to gVisor that, when enabled, creates a file at `/proc/gvisor/kernel_is_gvisor` that can be used by applications to detect whether they are running inside a gVisor sandbox. Useful for testing and introspection. PiperOrigin-RevId: 749217117
41 lines
1.3 KiB
Go
41 lines
1.3 KiB
Go
// Copyright 2025 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package gvisordetect implements a library that callers may use to detect
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// whether they are running on a gVisor kernel, assuming it is configured
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// to expose the gVisor marker file.
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package gvisordetect
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import (
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"errors"
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"fmt"
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"os"
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)
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// RunningInGVisor checks if the caller is running against a gVisor kernel.
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// This is only accurate if the gVisor kernel is configured to expose
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// its marker file.
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func RunningInGVisor() (bool, error) {
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const markerFilePath = "/proc/gvisor/kernel_is_gvisor"
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_, err := os.Stat(markerFilePath)
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if err == nil {
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return true, nil
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}
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if errors.Is(err, os.ErrNotExist) {
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return false, nil
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}
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return false, fmt.Errorf("cannot detect whether running in gVisor: %w", err)
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}
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