mirror of
https://github.com/optim-enterprises-bv/kubernetes.git
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65 lines
1.5 KiB
Go
65 lines
1.5 KiB
Go
/*
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Copyright 2024 The Kubernetes 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 cgroups
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import (
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"bufio"
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"fmt"
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"io"
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"os"
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"strings"
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)
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// ParseCgroupFileUnified returns legacy subsystem paths as the first value,
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// and returns the unified path as the second value.
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func ParseCgroupFileUnified(path string) (map[string]string, string, error) {
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f, err := os.Open(path)
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if err != nil {
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return nil, "", err
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}
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defer f.Close()
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return parseCgroupFromReaderUnified(f)
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}
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func parseCgroupFromReaderUnified(r io.Reader) (map[string]string, string, error) {
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var (
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cgroups = make(map[string]string)
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unified = ""
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s = bufio.NewScanner(r)
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)
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for s.Scan() {
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var (
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text = s.Text()
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parts = strings.SplitN(text, ":", 3)
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)
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if len(parts) < 3 {
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return nil, unified, fmt.Errorf("invalid cgroup entry: %q", text)
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}
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for _, subs := range strings.Split(parts[1], ",") {
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if subs == "" {
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unified = parts[2]
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} else {
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cgroups[subs] = parts[2]
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}
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}
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}
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if err := s.Err(); err != nil {
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return nil, unified, err
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}
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return cgroups, unified, nil
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}
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