mirror of
https://github.com/shirou/gopsutil.git
synced 2025-04-28 13:48:49 +08:00
be2b25a7c6
On Linux, most golang programs do not run as root (or at least, they should not), by default, the kernels uses strict permissions, so most userland programs cannot read `/sys/class/dmi/id/product_uuid`. However, programs such as Consul are relying on it to get fixed IDs, instead they have a different ID on each boot. We propose to use `/etc/machine-id` as fallback https://www.freedesktop.org/software/systemd/man/machine-id.html In order to fix this, this patch does the following: - if `/sys/class/dmi/id/product_uuid` can be read, use it for HostID - else if `/etc/machine-id` exists and has 32 chars, use it and add '-' to have the same format as product_uuid - finally, if notthing works, use the `kernel.random.boot_id` This will greatly increase the number of programs having correct behaviour when those rely on having a fixed HostID. This will fix the following issues: - https://github.com/shirou/gopsutil/issues/350 - https://github.com/hashicorp/consul/issues/4741
680 lines
17 KiB
Go
680 lines
17 KiB
Go
// +build linux
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package host
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import (
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"bytes"
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"context"
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"encoding/binary"
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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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"path/filepath"
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"regexp"
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"runtime"
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"strconv"
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"strings"
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"sync/atomic"
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"time"
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"github.com/shirou/gopsutil/internal/common"
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)
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type LSB struct {
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ID string
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Release string
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Codename string
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Description string
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}
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// from utmp.h
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const USER_PROCESS = 7
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func Info() (*InfoStat, error) {
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return InfoWithContext(context.Background())
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}
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func InfoWithContext(ctx context.Context) (*InfoStat, error) {
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ret := &InfoStat{
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OS: runtime.GOOS,
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}
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hostname, err := os.Hostname()
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if err == nil {
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ret.Hostname = hostname
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}
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platform, family, version, err := PlatformInformation()
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if err == nil {
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ret.Platform = platform
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ret.PlatformFamily = family
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ret.PlatformVersion = version
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}
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kernelVersion, err := KernelVersion()
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if err == nil {
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ret.KernelVersion = kernelVersion
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}
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system, role, err := Virtualization()
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if err == nil {
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ret.VirtualizationSystem = system
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ret.VirtualizationRole = role
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}
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boot, err := BootTime()
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if err == nil {
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ret.BootTime = boot
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ret.Uptime = uptime(boot)
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}
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if numProcs, err := common.NumProcs(); err == nil {
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ret.Procs = numProcs
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}
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sysProductUUID := common.HostSys("class/dmi/id/product_uuid")
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machineID := common.HostEtc("machine-id")
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switch {
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// When not running as root, lib cannot read the value
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case common.PathExists(sysProductUUID):
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lines, err := common.ReadLines(sysProductUUID)
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if err == nil && len(lines) > 0 && lines[0] != "" {
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ret.HostID = strings.ToLower(lines[0])
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break
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}
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fallthrough
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case common.PathExists(machineID):
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lines, err := common.ReadLines(machineID)
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if err == nil && len(lines) > 0 && len(lines[0]) == 32 {
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st := lines[0]
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ret.HostID = fmt.Sprintf("%s-%s-%s-%s-%s", st[0:8], st[8:12], st[12:16], st[16:20], st[20:32])
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break
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}
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fallthrough
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default:
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values, err := common.DoSysctrl("kernel.random.boot_id")
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if err == nil && len(values) == 1 && values[0] != "" {
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ret.HostID = strings.ToLower(values[0])
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}
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}
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return ret, nil
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}
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// cachedBootTime must be accessed via atomic.Load/StoreUint64
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var cachedBootTime uint64
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// BootTime returns the system boot time expressed in seconds since the epoch.
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func BootTime() (uint64, error) {
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return BootTimeWithContext(context.Background())
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}
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func BootTimeWithContext(ctx context.Context) (uint64, error) {
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t := atomic.LoadUint64(&cachedBootTime)
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if t != 0 {
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return t, nil
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}
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system, role, err := Virtualization()
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if err != nil {
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return 0, err
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}
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statFile := "stat"
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if system == "lxc" && role == "guest" {
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// if lxc, /proc/uptime is used.
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statFile = "uptime"
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} else if system == "docker" && role == "guest" {
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// also docker, guest
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statFile = "uptime"
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}
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filename := common.HostProc(statFile)
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lines, err := common.ReadLines(filename)
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if err != nil {
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return 0, err
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}
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if statFile == "stat" {
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for _, line := range lines {
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if strings.HasPrefix(line, "btime") {
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f := strings.Fields(line)
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if len(f) != 2 {
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return 0, fmt.Errorf("wrong btime format")
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}
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b, err := strconv.ParseInt(f[1], 10, 64)
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if err != nil {
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return 0, err
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}
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t = uint64(b)
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atomic.StoreUint64(&cachedBootTime, t)
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return t, nil
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}
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}
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} else if statFile == "uptime" {
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if len(lines) != 1 {
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return 0, fmt.Errorf("wrong uptime format")
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}
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f := strings.Fields(lines[0])
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b, err := strconv.ParseFloat(f[0], 64)
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if err != nil {
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return 0, err
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}
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t = uint64(time.Now().Unix()) - uint64(b)
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atomic.StoreUint64(&cachedBootTime, t)
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return t, nil
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}
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return 0, fmt.Errorf("could not find btime")
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}
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func uptime(boot uint64) uint64 {
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return uint64(time.Now().Unix()) - boot
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}
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func Uptime() (uint64, error) {
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return UptimeWithContext(context.Background())
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}
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func UptimeWithContext(ctx context.Context) (uint64, error) {
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boot, err := BootTime()
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if err != nil {
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return 0, err
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}
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return uptime(boot), nil
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}
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func Users() ([]UserStat, error) {
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return UsersWithContext(context.Background())
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}
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func UsersWithContext(ctx context.Context) ([]UserStat, error) {
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utmpfile := common.HostVar("run/utmp")
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file, err := os.Open(utmpfile)
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if err != nil {
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return nil, err
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}
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defer file.Close()
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buf, err := ioutil.ReadAll(file)
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if err != nil {
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return nil, err
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}
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count := len(buf) / sizeOfUtmp
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ret := make([]UserStat, 0, count)
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for i := 0; i < count; i++ {
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b := buf[i*sizeOfUtmp : (i+1)*sizeOfUtmp]
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var u utmp
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br := bytes.NewReader(b)
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err := binary.Read(br, binary.LittleEndian, &u)
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if err != nil {
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continue
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}
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if u.Type != USER_PROCESS {
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continue
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}
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user := UserStat{
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User: common.IntToString(u.User[:]),
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Terminal: common.IntToString(u.Line[:]),
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Host: common.IntToString(u.Host[:]),
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Started: int(u.Tv.Sec),
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}
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ret = append(ret, user)
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}
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return ret, nil
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}
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func getOSRelease() (platform string, version string, err error) {
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contents, err := common.ReadLines(common.HostEtc("os-release"))
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if err != nil {
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return "", "", nil // return empty
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}
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for _, line := range contents {
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field := strings.Split(line, "=")
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if len(field) < 2 {
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continue
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}
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switch field[0] {
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case "ID": // use ID for lowercase
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platform = field[1]
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case "VERSION":
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version = field[1]
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}
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}
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return platform, version, nil
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}
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func getLSB() (*LSB, error) {
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ret := &LSB{}
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if common.PathExists(common.HostEtc("lsb-release")) {
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contents, err := common.ReadLines(common.HostEtc("lsb-release"))
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if err != nil {
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return ret, err // return empty
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}
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for _, line := range contents {
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field := strings.Split(line, "=")
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if len(field) < 2 {
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continue
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}
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switch field[0] {
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case "DISTRIB_ID":
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ret.ID = field[1]
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case "DISTRIB_RELEASE":
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ret.Release = field[1]
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case "DISTRIB_CODENAME":
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ret.Codename = field[1]
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case "DISTRIB_DESCRIPTION":
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ret.Description = field[1]
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}
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}
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} else if common.PathExists("/usr/bin/lsb_release") {
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lsb_release, err := exec.LookPath("/usr/bin/lsb_release")
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if err != nil {
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return ret, err
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}
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out, err := invoke.Command(lsb_release)
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if err != nil {
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return ret, err
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}
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for _, line := range strings.Split(string(out), "\n") {
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field := strings.Split(line, ":")
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if len(field) < 2 {
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continue
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}
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switch field[0] {
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case "Distributor ID":
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ret.ID = field[1]
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case "Release":
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ret.Release = field[1]
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case "Codename":
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ret.Codename = field[1]
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case "Description":
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ret.Description = field[1]
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}
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}
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}
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return ret, nil
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}
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func PlatformInformation() (platform string, family string, version string, err error) {
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return PlatformInformationWithContext(context.Background())
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}
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func PlatformInformationWithContext(ctx context.Context) (platform string, family string, version string, err error) {
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lsb, err := getLSB()
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if err != nil {
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lsb = &LSB{}
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}
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if common.PathExists(common.HostEtc("oracle-release")) {
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platform = "oracle"
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contents, err := common.ReadLines(common.HostEtc("oracle-release"))
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if err == nil {
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version = getRedhatishVersion(contents)
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}
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} else if common.PathExists(common.HostEtc("enterprise-release")) {
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platform = "oracle"
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contents, err := common.ReadLines(common.HostEtc("enterprise-release"))
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if err == nil {
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version = getRedhatishVersion(contents)
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}
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} else if common.PathExists(common.HostEtc("slackware-version")) {
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platform = "slackware"
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contents, err := common.ReadLines(common.HostEtc("slackware-version"))
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if err == nil {
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version = getSlackwareVersion(contents)
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}
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} else if common.PathExists(common.HostEtc("debian_version")) {
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if lsb.ID == "Ubuntu" {
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platform = "ubuntu"
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version = lsb.Release
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} else if lsb.ID == "LinuxMint" {
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platform = "linuxmint"
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version = lsb.Release
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} else {
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if common.PathExists("/usr/bin/raspi-config") {
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platform = "raspbian"
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} else {
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platform = "debian"
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}
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contents, err := common.ReadLines(common.HostEtc("debian_version"))
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if err == nil {
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version = contents[0]
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}
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}
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} else if common.PathExists(common.HostEtc("redhat-release")) {
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contents, err := common.ReadLines(common.HostEtc("redhat-release"))
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if err == nil {
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version = getRedhatishVersion(contents)
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platform = getRedhatishPlatform(contents)
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}
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} else if common.PathExists(common.HostEtc("system-release")) {
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contents, err := common.ReadLines(common.HostEtc("system-release"))
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if err == nil {
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version = getRedhatishVersion(contents)
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platform = getRedhatishPlatform(contents)
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}
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} else if common.PathExists(common.HostEtc("gentoo-release")) {
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platform = "gentoo"
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contents, err := common.ReadLines(common.HostEtc("gentoo-release"))
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if err == nil {
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version = getRedhatishVersion(contents)
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}
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} else if common.PathExists(common.HostEtc("SuSE-release")) {
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contents, err := common.ReadLines(common.HostEtc("SuSE-release"))
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if err == nil {
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version = getSuseVersion(contents)
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platform = getSusePlatform(contents)
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}
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// TODO: slackware detecion
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} else if common.PathExists(common.HostEtc("arch-release")) {
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platform = "arch"
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version = lsb.Release
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} else if common.PathExists(common.HostEtc("alpine-release")) {
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platform = "alpine"
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contents, err := common.ReadLines(common.HostEtc("alpine-release"))
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if err == nil && len(contents) > 0 {
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version = contents[0]
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}
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} else if common.PathExists(common.HostEtc("os-release")) {
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p, v, err := getOSRelease()
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if err == nil {
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platform = p
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version = v
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}
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} else if lsb.ID == "RedHat" {
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platform = "redhat"
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version = lsb.Release
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} else if lsb.ID == "Amazon" {
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platform = "amazon"
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version = lsb.Release
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} else if lsb.ID == "ScientificSL" {
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platform = "scientific"
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version = lsb.Release
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} else if lsb.ID == "XenServer" {
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platform = "xenserver"
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version = lsb.Release
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} else if lsb.ID != "" {
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platform = strings.ToLower(lsb.ID)
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version = lsb.Release
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}
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switch platform {
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case "debian", "ubuntu", "linuxmint", "raspbian":
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family = "debian"
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case "fedora":
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family = "fedora"
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case "oracle", "centos", "redhat", "scientific", "enterpriseenterprise", "amazon", "xenserver", "cloudlinux", "ibm_powerkvm":
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family = "rhel"
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case "suse", "opensuse":
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family = "suse"
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case "gentoo":
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family = "gentoo"
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case "slackware":
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family = "slackware"
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case "arch":
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family = "arch"
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case "exherbo":
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family = "exherbo"
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case "alpine":
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family = "alpine"
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case "coreos":
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family = "coreos"
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}
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return platform, family, version, nil
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}
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func KernelVersion() (version string, err error) {
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return KernelVersionWithContext(context.Background())
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}
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func KernelVersionWithContext(ctx context.Context) (version string, err error) {
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filename := common.HostProc("sys/kernel/osrelease")
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if common.PathExists(filename) {
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contents, err := common.ReadLines(filename)
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if err != nil {
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return "", err
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}
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if len(contents) > 0 {
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version = contents[0]
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}
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}
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return version, nil
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}
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func getSlackwareVersion(contents []string) string {
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c := strings.ToLower(strings.Join(contents, ""))
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c = strings.Replace(c, "slackware ", "", 1)
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return c
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}
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func getRedhatishVersion(contents []string) string {
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c := strings.ToLower(strings.Join(contents, ""))
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if strings.Contains(c, "rawhide") {
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return "rawhide"
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}
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if matches := regexp.MustCompile(`release (\d[\d.]*)`).FindStringSubmatch(c); matches != nil {
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return matches[1]
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}
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return ""
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}
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func getRedhatishPlatform(contents []string) string {
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c := strings.ToLower(strings.Join(contents, ""))
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if strings.Contains(c, "red hat") {
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return "redhat"
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}
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f := strings.Split(c, " ")
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return f[0]
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}
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func getSuseVersion(contents []string) string {
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version := ""
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for _, line := range contents {
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if matches := regexp.MustCompile(`VERSION = ([\d.]+)`).FindStringSubmatch(line); matches != nil {
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version = matches[1]
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} else if matches := regexp.MustCompile(`PATCHLEVEL = ([\d]+)`).FindStringSubmatch(line); matches != nil {
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version = version + "." + matches[1]
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}
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}
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return version
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}
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func getSusePlatform(contents []string) string {
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c := strings.ToLower(strings.Join(contents, ""))
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if strings.Contains(c, "opensuse") {
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return "opensuse"
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}
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return "suse"
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}
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|
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func Virtualization() (string, string, error) {
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return VirtualizationWithContext(context.Background())
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}
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|
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func VirtualizationWithContext(ctx context.Context) (string, string, error) {
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var system string
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var role string
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filename := common.HostProc("xen")
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if common.PathExists(filename) {
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system = "xen"
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role = "guest" // assume guest
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if common.PathExists(filepath.Join(filename, "capabilities")) {
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contents, err := common.ReadLines(filepath.Join(filename, "capabilities"))
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if err == nil {
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if common.StringsContains(contents, "control_d") {
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role = "host"
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}
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}
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}
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}
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filename = common.HostProc("modules")
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if common.PathExists(filename) {
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contents, err := common.ReadLines(filename)
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if err == nil {
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if common.StringsContains(contents, "kvm") {
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system = "kvm"
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role = "host"
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} else if common.StringsContains(contents, "vboxdrv") {
|
|
system = "vbox"
|
|
role = "host"
|
|
} else if common.StringsContains(contents, "vboxguest") {
|
|
system = "vbox"
|
|
role = "guest"
|
|
} else if common.StringsContains(contents, "vmware") {
|
|
system = "vmware"
|
|
role = "guest"
|
|
}
|
|
}
|
|
}
|
|
|
|
filename = common.HostProc("cpuinfo")
|
|
if common.PathExists(filename) {
|
|
contents, err := common.ReadLines(filename)
|
|
if err == nil {
|
|
if common.StringsContains(contents, "QEMU Virtual CPU") ||
|
|
common.StringsContains(contents, "Common KVM processor") ||
|
|
common.StringsContains(contents, "Common 32-bit KVM processor") {
|
|
system = "kvm"
|
|
role = "guest"
|
|
}
|
|
}
|
|
}
|
|
|
|
filename = common.HostProc()
|
|
if common.PathExists(filepath.Join(filename, "bc", "0")) {
|
|
system = "openvz"
|
|
role = "host"
|
|
} else if common.PathExists(filepath.Join(filename, "vz")) {
|
|
system = "openvz"
|
|
role = "guest"
|
|
}
|
|
|
|
// not use dmidecode because it requires root
|
|
if common.PathExists(filepath.Join(filename, "self", "status")) {
|
|
contents, err := common.ReadLines(filepath.Join(filename, "self", "status"))
|
|
if err == nil {
|
|
|
|
if common.StringsContains(contents, "s_context:") ||
|
|
common.StringsContains(contents, "VxID:") {
|
|
system = "linux-vserver"
|
|
}
|
|
// TODO: guest or host
|
|
}
|
|
}
|
|
|
|
if common.PathExists(filepath.Join(filename, "self", "cgroup")) {
|
|
contents, err := common.ReadLines(filepath.Join(filename, "self", "cgroup"))
|
|
if err == nil {
|
|
if common.StringsContains(contents, "lxc") {
|
|
system = "lxc"
|
|
role = "guest"
|
|
} else if common.StringsContains(contents, "docker") {
|
|
system = "docker"
|
|
role = "guest"
|
|
} else if common.StringsContains(contents, "machine-rkt") {
|
|
system = "rkt"
|
|
role = "guest"
|
|
} else if common.PathExists("/usr/bin/lxc-version") {
|
|
system = "lxc"
|
|
role = "host"
|
|
}
|
|
}
|
|
}
|
|
|
|
if common.PathExists(common.HostEtc("os-release")) {
|
|
p, _, err := getOSRelease()
|
|
if err == nil && p == "coreos" {
|
|
system = "rkt" // Is it true?
|
|
role = "host"
|
|
}
|
|
}
|
|
return system, role, nil
|
|
}
|
|
|
|
func SensorsTemperatures() ([]TemperatureStat, error) {
|
|
return SensorsTemperaturesWithContext(context.Background())
|
|
}
|
|
|
|
func SensorsTemperaturesWithContext(ctx context.Context) ([]TemperatureStat, error) {
|
|
var temperatures []TemperatureStat
|
|
files, err := filepath.Glob(common.HostSys("/class/hwmon/hwmon*/temp*_*"))
|
|
if err != nil {
|
|
return temperatures, err
|
|
}
|
|
if len(files) == 0 {
|
|
// CentOS has an intermediate /device directory:
|
|
// https://github.com/giampaolo/psutil/issues/971
|
|
files, err = filepath.Glob(common.HostSys("/class/hwmon/hwmon*/device/temp*_*"))
|
|
if err != nil {
|
|
return temperatures, err
|
|
}
|
|
}
|
|
|
|
// example directory
|
|
// device/ temp1_crit_alarm temp2_crit_alarm temp3_crit_alarm temp4_crit_alarm temp5_crit_alarm temp6_crit_alarm temp7_crit_alarm
|
|
// name temp1_input temp2_input temp3_input temp4_input temp5_input temp6_input temp7_input
|
|
// power/ temp1_label temp2_label temp3_label temp4_label temp5_label temp6_label temp7_label
|
|
// subsystem/ temp1_max temp2_max temp3_max temp4_max temp5_max temp6_max temp7_max
|
|
// temp1_crit temp2_crit temp3_crit temp4_crit temp5_crit temp6_crit temp7_crit uevent
|
|
for _, file := range files {
|
|
filename := strings.Split(filepath.Base(file), "_")
|
|
if filename[1] == "label" {
|
|
// Do not try to read the temperature of the label file
|
|
continue
|
|
}
|
|
|
|
// Get the label of the temperature you are reading
|
|
var label string
|
|
c, _ := ioutil.ReadFile(filepath.Join(filepath.Dir(file), filename[0]+"_label"))
|
|
if c != nil {
|
|
//format the label from "Core 0" to "core0_"
|
|
label = fmt.Sprintf("%s_", strings.Join(strings.Split(strings.TrimSpace(strings.ToLower(string(c))), " "), ""))
|
|
}
|
|
|
|
// Get the name of the tempearture you are reading
|
|
name, err := ioutil.ReadFile(filepath.Join(filepath.Dir(file), "name"))
|
|
if err != nil {
|
|
return temperatures, err
|
|
}
|
|
|
|
// Get the temperature reading
|
|
current, err := ioutil.ReadFile(file)
|
|
if err != nil {
|
|
return temperatures, err
|
|
}
|
|
temperature, err := strconv.ParseFloat(strings.TrimSpace(string(current)), 64)
|
|
if err != nil {
|
|
continue
|
|
}
|
|
|
|
tempName := strings.TrimSpace(strings.ToLower(string(strings.Join(filename[1:], ""))))
|
|
temperatures = append(temperatures, TemperatureStat{
|
|
SensorKey: fmt.Sprintf("%s_%s%s", strings.TrimSpace(string(name)), label, tempName),
|
|
Temperature: temperature / 1000.0,
|
|
})
|
|
}
|
|
return temperatures, nil
|
|
}
|