mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-22 16:29:18 +00:00
57 lines
1.5 KiB
Go
57 lines
1.5 KiB
Go
/**
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# Copyright (c) 2021, NVIDIA CORPORATION. All rights reserved.
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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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**/
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package lookup
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import (
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"fmt"
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"os"
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)
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const (
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devRoot = "/dev"
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)
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// NewCharDeviceLocator creates a Locator that can be used to find char devices at the specified root. A logger is
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// also specified.
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func NewCharDeviceLocator(opts ...Option) Locator {
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filter := assertCharDevice
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// TODO: We should have a better way to inject this logic than this envvar.
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if os.Getenv("__NVCT_TESTING_DEVICES_ARE_FILES") == "true" {
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filter = assertFile
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}
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opts = append(opts,
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WithSearchPaths("", devRoot),
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WithFilter(filter),
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)
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return NewFileLocator(
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opts...,
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)
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}
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// assertCharDevice checks whether the specified path is a char device and returns an error if this is not the case.
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func assertCharDevice(filename string) error {
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info, err := os.Lstat(filename)
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if err != nil {
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return fmt.Errorf("error getting info: %v", err)
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}
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if info.Mode()&os.ModeCharDevice == 0 {
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return fmt.Errorf("%v is not a char device", filename)
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}
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return nil
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}
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