mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-23 00:38:26 +00:00
74 lines
2.0 KiB
Go
74 lines
2.0 KiB
Go
/**
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# Copyright (c) 2022, 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 oci
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import (
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"encoding/json"
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"fmt"
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"io"
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"os"
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"github.com/opencontainers/runtime-spec/specs-go"
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)
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// State stores an OCI container state. This includes the spec path and the environment
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type State specs.State
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// LoadContainerState loads the container state from the specified filename. If the filename is empty or '-' the state is loaded from STDIN
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func LoadContainerState(filename string) (*State, error) {
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if filename == "" || filename == "-" {
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return ReadContainerState(os.Stdin)
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}
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inputFile, err := os.Open(filename)
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if err != nil {
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return nil, fmt.Errorf("failed to open file: %v", err)
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}
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defer inputFile.Close()
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return ReadContainerState(inputFile)
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}
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// ReadContainerState reads the container state from the specified reader
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func ReadContainerState(reader io.Reader) (*State, error) {
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var s State
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d := json.NewDecoder(reader)
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if err := d.Decode(&s); err != nil {
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return nil, fmt.Errorf("failed to decode container state: %v", err)
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}
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return &s, nil
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}
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// LoadSpec loads the OCI spec associated with the container state
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func (s State) LoadSpec() (*specs.Spec, error) {
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specFilePath := GetSpecFilePath(s.Bundle)
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specFile, err := os.Open(specFilePath)
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if err != nil {
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return nil, fmt.Errorf("failed to open OCI spec file: %v", err)
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}
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defer specFile.Close()
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spec, err := LoadFrom(specFile)
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if err != nil {
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return nil, fmt.Errorf("failed to load OCI spec: %v", err)
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}
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return spec, nil
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}
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