mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-23 00:38:26 +00:00
7c5504a1cf
This change adds a symlink locator that follows symlinks and returns all elements in the chain and a device locator that finds character devices. Signed-off-by: Evan Lezar <elezar@nvidia.com>
54 lines
1.4 KiB
Go
54 lines
1.4 KiB
Go
/**
|
|
# Copyright (c) 2021, NVIDIA CORPORATION. All rights reserved.
|
|
#
|
|
# 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 lookup
|
|
|
|
import (
|
|
"fmt"
|
|
"os"
|
|
"path/filepath"
|
|
|
|
"github.com/sirupsen/logrus"
|
|
)
|
|
|
|
const (
|
|
devRoot = "/dev"
|
|
)
|
|
|
|
// NewCharDeviceLocator creates a Locator that can be used to find char devices at the specified root. A logger is
|
|
// also specified.
|
|
func NewCharDeviceLocator(logger *logrus.Logger, root string) Locator {
|
|
l := file{
|
|
logger: logger,
|
|
prefixes: []string{root, filepath.Join(root, devRoot)},
|
|
filter: assertCharDevice,
|
|
}
|
|
|
|
return &l
|
|
}
|
|
|
|
// assertCharDevice checks whether the specified path is a char device and returns an error if this is not the case.
|
|
func assertCharDevice(filename string) error {
|
|
info, err := os.Stat(filename)
|
|
if err != nil {
|
|
return fmt.Errorf("error getting info: %v", err)
|
|
}
|
|
if info.Mode()|os.ModeCharDevice == 0 {
|
|
return fmt.Errorf("%v is not a char device", filename)
|
|
}
|
|
return nil
|
|
}
|