mirror of https://github.com/k3s-io/k3s
55 lines
1.5 KiB
Go
55 lines
1.5 KiB
Go
// Copyright 2020 Google Inc. 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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// +build freebsd darwin linux
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package machine
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import (
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"fmt"
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"io/ioutil"
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"os"
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"os/exec"
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"regexp"
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"runtime"
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"strings"
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)
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var rex = regexp.MustCompile("(PRETTY_NAME)=(.*)")
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// getOperatingSystem gets the name of the current operating system.
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func getOperatingSystem() (string, error) {
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if runtime.GOOS == "darwin" || runtime.GOOS == "freebsd" {
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cmd := exec.Command("uname", "-s")
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osName, err := cmd.Output()
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if err != nil {
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return "", err
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}
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return string(osName), nil
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}
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bytes, err := ioutil.ReadFile("/etc/os-release")
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if err != nil && os.IsNotExist(err) {
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// /usr/lib/os-release in stateless systems like Clear Linux
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bytes, err = ioutil.ReadFile("/usr/lib/os-release")
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}
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if err != nil {
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return "", fmt.Errorf("error opening file : %v", err)
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}
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line := rex.FindAllStringSubmatch(string(bytes), -1)
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if len(line) > 0 {
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return strings.Trim(line[0][2], "\""), nil
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}
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return "Linux", nil
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}
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