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osinfo_linux.go
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/* Copyright 2016 Miguel Moll
*
* 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 osinfo
import (
"fmt"
"io/ioutil"
"log"
"os/exec"
"runtime"
"strings"
)
var uname = "/usr/bin/uname"
var osReleaseFile string
var distroInfo = make(map[string]string)
var releaseFile string
func init() {
releaseFiles := []string{}
files, _ := ioutil.ReadDir("/etc")
for _, f := range files {
if !f.IsDir() {
if strings.HasSuffix(f.Name(), "-release") {
releaseFiles = append(releaseFiles, f.Name())
}
// "/etc/os-release" is the special file with a lot of data. Try it first!
if f.Name() == "os-release" {
osReleaseFile = "/etc/os-release"
}
}
}
if osReleaseFile != "" {
parseOSRelease()
}
}
func parseOSRelease() {
bytes, err := ioutil.ReadFile(osReleaseFile)
if err != nil {
log.Println("Unable to parse os release file")
return
}
dataLines := strings.Split(string(bytes), "\n")
for _, line := range dataLines {
if line == "" {
continue
}
entries := strings.Split(line, "=")
distroInfo[entries[0]] = entries[1]
}
}
func platform() string {
_, err := exec.Command(uname).Output()
if err != nil {
return ""
}
return runtime.GOOS
}
func kernel() string {
out, err := exec.Command(uname, "-r").Output()
if err != nil {
fmt.Println(err)
return ""
}
return strings.TrimSpace(string(out))
}
func arch() string {
out, err := exec.Command(uname, "-p").Output()
if err != nil {
fmt.Println(err)
return ""
}
return strings.TrimSpace(string(out))
}
func distribution() string {
if val, ok := distroInfo["NAME"]; ok {
return val
}
return ""
}
func version() string {
if val, ok := distroInfo["VERSION_ID"]; ok {
return val
}
return ""
}
func pretty() string {
if val, ok := distroInfo["PRETTY_NAME"]; ok {
// Get rid of the quotes surronding the string.
return strings.TrimSuffix(strings.TrimPrefix(val, "\""), "\"")
}
return ""
}