66 lines
1.3 KiB
Go
66 lines
1.3 KiB
Go
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/*
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Copyright The containerd Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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 v2
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import (
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"io/ioutil"
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"path/filepath"
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"strings"
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)
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// State is a type that represents the state of the current cgroup
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type State string
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const (
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Unknown State = ""
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Thawed State = "thawed"
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Frozen State = "frozen"
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Deleted State = "deleted"
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cgroupFreeze = "cgroup.freeze"
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)
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func (s State) Values() []Value {
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v := Value{
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filename: cgroupFreeze,
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}
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switch s {
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case Frozen:
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v.value = "1"
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case Thawed:
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v.value = "0"
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}
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return []Value{
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v,
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}
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}
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func fetchState(path string) (State, error) {
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current, err := ioutil.ReadFile(filepath.Join(path, cgroupFreeze))
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if err != nil {
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return Unknown, err
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}
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switch strings.TrimSpace(string(current)) {
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case "1":
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return Frozen, nil
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case "0":
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return Thawed, nil
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default:
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return Unknown, nil
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}
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}
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