mirror of
https://github.com/kubernetes-sigs/node-feature-discovery.git
synced 2024-12-14 11:57:51 +00:00
65 lines
1.6 KiB
Go
65 lines
1.6 KiB
Go
/*
|
|
Copyright 2018-2021 The Kubernetes 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
|
|
|
|
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 kernel
|
|
|
|
import (
|
|
"os"
|
|
"regexp"
|
|
"strings"
|
|
)
|
|
|
|
// Read and parse kernel version
|
|
func discoverVersion() (map[string]string, error) {
|
|
raw, err := getVersion()
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
return parseVersion(raw), nil
|
|
}
|
|
|
|
func parseVersion(raw string) map[string]string {
|
|
version := map[string]string{}
|
|
|
|
// Replace forbidden symbols
|
|
fullRegex := regexp.MustCompile("[^-A-Za-z0-9_.]")
|
|
full := fullRegex.ReplaceAllString(raw, "_")
|
|
// Label values must start and end with an alphanumeric
|
|
full = strings.Trim(full, "-_.")
|
|
|
|
version["full"] = full
|
|
|
|
// Regexp for parsing version components
|
|
re := regexp.MustCompile(`^(?P<major>\d+)(\.(?P<minor>\d+))?(\.(?P<revision>\d+))?(-.*)?$`)
|
|
if m := re.FindStringSubmatch(full); m != nil {
|
|
for i, name := range re.SubexpNames() {
|
|
if i != 0 && name != "" {
|
|
version[name] = m[i]
|
|
}
|
|
}
|
|
}
|
|
|
|
return version
|
|
}
|
|
|
|
func getVersion() (string, error) {
|
|
unameRaw, err := os.ReadFile("/proc/sys/kernel/osrelease")
|
|
if err != nil {
|
|
return "", err
|
|
}
|
|
return strings.TrimSpace(string(unameRaw)), nil
|
|
}
|