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// Copyright 2020 The gVisor 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
//
// https://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 shim
import (
"encoding/json"
"io/ioutil"
"path/filepath"
)
const filename = "state.json"
// state holds information needed between shim invocations.
type state struct {
// Rootfs is the full path to the location rootfs was mounted.
Rootfs string `json:"rootfs"`
// Options is the configuration loaded from config.toml.
Options options `json:"options"`
}
func (s state) load(path string) error {
data, err := ioutil.ReadFile(filepath.Join(path, filename))
if err != nil {
return err
}
return json.Unmarshal(data, &s)
}
func (s state) save(path string) error {
data, err := json.Marshal(&s)
if err != nil {
return err
}
return ioutil.WriteFile(filepath.Join(path, filename), data, 0644)
}
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