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host_linux.go
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host_linux.go
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//go:build linux
// +build linux
package host
import (
"bytes"
"context"
"encoding/binary"
"fmt"
"io/ioutil"
"os"
"path/filepath"
"regexp"
"strconv"
"strings"
"github.com/AspenScythe/gopsutil/v3/internal/common"
"golang.org/x/sys/unix"
)
type Warnings = common.Warnings
type lsbStruct struct {
ID string
Release string
Codename string
Description string
}
// from utmp.h
const (
user_PROCESS = 7
hostTemperatureScale = 1000.0
)
func HostIDWithContext(ctx context.Context) (string, error) {
sysProductUUID := common.HostSys("class/dmi/id/product_uuid")
machineID := common.HostEtc("machine-id")
procSysKernelRandomBootID := common.HostProc("sys/kernel/random/boot_id")
switch {
// In order to read this file, needs to be supported by kernel/arch and run as root
// so having fallback is important
case common.PathExists(sysProductUUID):
lines, err := common.ReadLines(sysProductUUID)
if err == nil && len(lines) > 0 && lines[0] != "" {
return strings.ToLower(lines[0]), nil
}
fallthrough
// Fallback on GNU Linux systems with systemd, readable by everyone
case common.PathExists(machineID):
lines, err := common.ReadLines(machineID)
if err == nil && len(lines) > 0 && len(lines[0]) == 32 {
st := lines[0]
return fmt.Sprintf("%s-%s-%s-%s-%s", st[0:8], st[8:12], st[12:16], st[16:20], st[20:32]), nil
}
fallthrough
// Not stable between reboot, but better than nothing
default:
lines, err := common.ReadLines(procSysKernelRandomBootID)
if err == nil && len(lines) > 0 && lines[0] != "" {
return strings.ToLower(lines[0]), nil
}
}
return "", nil
}
func numProcs(ctx context.Context) (uint64, error) {
return common.NumProcs()
}
func BootTimeWithContext(ctx context.Context) (uint64, error) {
return common.BootTimeWithContext(ctx)
}
func UptimeWithContext(ctx context.Context) (uint64, error) {
sysinfo := &unix.Sysinfo_t{}
if err := unix.Sysinfo(sysinfo); err != nil {
return 0, err
}
return uint64(sysinfo.Uptime), nil
}
func UsersWithContext(ctx context.Context) ([]UserStat, error) {
utmpfile := common.HostVar("run/utmp")
file, err := os.Open(utmpfile)
if err != nil {
return nil, err
}
defer file.Close()
buf, err := ioutil.ReadAll(file)
if err != nil {
return nil, err
}
count := len(buf) / sizeOfUtmp
ret := make([]UserStat, 0, count)
for i := 0; i < count; i++ {
b := buf[i*sizeOfUtmp : (i+1)*sizeOfUtmp]
var u utmp
br := bytes.NewReader(b)
err := binary.Read(br, binary.LittleEndian, &u)
if err != nil {
continue
}
if u.Type != user_PROCESS {
continue
}
user := UserStat{
User: common.IntToString(u.User[:]),
Terminal: common.IntToString(u.Line[:]),
Host: common.IntToString(u.Host[:]),
Started: int(u.Tv.Sec),
}
ret = append(ret, user)
}
return ret, nil
}
func getlsbStruct() (*lsbStruct, error) {
ret := &lsbStruct{}
if common.PathExists(common.HostEtc("lsb-release")) {
contents, err := common.ReadLines(common.HostEtc("lsb-release"))
if err != nil {
return ret, err // return empty
}
for _, line := range contents {
field := strings.Split(line, "=")
if len(field) < 2 {
continue
}
switch field[0] {
case "DISTRIB_ID":
ret.ID = field[1]
case "DISTRIB_RELEASE":
ret.Release = field[1]
case "DISTRIB_CODENAME":
ret.Codename = field[1]
case "DISTRIB_DESCRIPTION":
ret.Description = field[1]
}
}
} else if common.PathExists("/usr/bin/lsb_release") {
out, err := invoke.Command("/usr/bin/lsb_release")
if err != nil {
return ret, err
}
for _, line := range strings.Split(string(out), "\n") {
field := strings.Split(line, ":")
if len(field) < 2 {
continue
}
switch field[0] {
case "Distributor ID":
ret.ID = field[1]
case "Release":
ret.Release = field[1]
case "Codename":
ret.Codename = field[1]
case "Description":
ret.Description = field[1]
}
}
}
return ret, nil
}
func PlatformInformationWithContext(ctx context.Context) (platform string, family string, version string, err error) {
lsb, err := getlsbStruct()
if err != nil {
lsb = &lsbStruct{}
}
if common.PathExistsWithContents(common.HostEtc("oracle-release")) {
platform = "oracle"
contents, err := common.ReadLines(common.HostEtc("oracle-release"))
if err == nil {
version = getRedhatishVersion(contents)
}
} else if common.PathExistsWithContents(common.HostEtc("enterprise-release")) {
platform = "oracle"
contents, err := common.ReadLines(common.HostEtc("enterprise-release"))
if err == nil {
version = getRedhatishVersion(contents)
}
} else if common.PathExistsWithContents(common.HostEtc("slackware-version")) {
platform = "slackware"
contents, err := common.ReadLines(common.HostEtc("slackware-version"))
if err == nil {
version = getSlackwareVersion(contents)
}
} else if common.PathExistsWithContents(common.HostEtc("debian_version")) {
if lsb.ID == "Ubuntu" {
platform = "ubuntu"
version = lsb.Release
} else if lsb.ID == "LinuxMint" {
platform = "linuxmint"
version = lsb.Release
} else if lsb.ID == "Kylin" {
platform = "Kylin"
version = lsb.Release
} else {
if common.PathExistsWithContents("/usr/bin/raspi-config") {
platform = "raspbian"
} else {
platform = "debian"
}
contents, err := common.ReadLines(common.HostEtc("debian_version"))
if err == nil && len(contents) > 0 && contents[0] != "" {
version = contents[0]
}
}
} else if common.PathExists(common.HostEtc("neokylin-release")) {
contents, err := common.ReadLines(common.HostEtc("neokylin-release"))
if err == nil {
version = getRedhatishVersion(contents)
platform = getRedhatishPlatform(contents)
}
} else if common.PathExists(common.HostEtc("redhat-release")) {
contents, err := common.ReadLines(common.HostEtc("redhat-release"))
if err == nil {
version = getRedhatishVersion(contents)
platform = getRedhatishPlatform(contents)
}
} else if common.PathExists(common.HostEtc("system-release")) {
contents, err := common.ReadLines(common.HostEtc("system-release"))
if err == nil {
version = getRedhatishVersion(contents)
platform = getRedhatishPlatform(contents)
}
} else if common.PathExists(common.HostEtc("gentoo-release")) {
platform = "gentoo"
contents, err := common.ReadLines(common.HostEtc("gentoo-release"))
if err == nil {
version = getRedhatishVersion(contents)
}
} else if common.PathExists(common.HostEtc("SuSE-release")) {
contents, err := common.ReadLines(common.HostEtc("SuSE-release"))
if err == nil {
version = getSuseVersion(contents)
platform = getSusePlatform(contents)
}
// TODO: slackware detecion
} else if common.PathExists(common.HostEtc("arch-release")) {
platform = "arch"
version = lsb.Release
} else if common.PathExists(common.HostEtc("alpine-release")) {
platform = "alpine"
contents, err := common.ReadLines(common.HostEtc("alpine-release"))
if err == nil && len(contents) > 0 && contents[0] != "" {
version = contents[0]
}
} else if common.PathExists(common.HostEtc("os-release")) {
p, v, err := common.GetOSRelease()
if err == nil {
platform = p
version = v
}
} else if lsb.ID == "RedHat" {
platform = "redhat"
version = lsb.Release
} else if lsb.ID == "Amazon" {
platform = "amazon"
version = lsb.Release
} else if lsb.ID == "ScientificSL" {
platform = "scientific"
version = lsb.Release
} else if lsb.ID == "XenServer" {
platform = "xenserver"
version = lsb.Release
} else if lsb.ID != "" {
platform = strings.ToLower(lsb.ID)
version = lsb.Release
}
platform = strings.Trim(platform, `"`)
switch platform {
case "debian", "ubuntu", "linuxmint", "raspbian":
family = "debian"
case "fedora":
family = "fedora"
case "oracle", "centos", "redhat", "scientific", "enterpriseenterprise", "amazon", "xenserver", "cloudlinux", "ibm_powerkvm", "rocky", "almalinux":
family = "rhel"
case "suse", "opensuse", "opensuse-leap", "opensuse-tumbleweed", "opensuse-tumbleweed-kubic", "sles", "sled", "caasp":
family = "suse"
case "gentoo":
family = "gentoo"
case "slackware":
family = "slackware"
case "arch":
family = "arch"
case "exherbo":
family = "exherbo"
case "alpine":
family = "alpine"
case "coreos":
family = "coreos"
case "solus":
family = "solus"
case "neokylin":
family = "neokylin"
}
return platform, family, version, nil
}
func KernelVersionWithContext(ctx context.Context) (version string, err error) {
var utsname unix.Utsname
err = unix.Uname(&utsname)
if err != nil {
return "", err
}
return unix.ByteSliceToString(utsname.Release[:]), nil
}
func getSlackwareVersion(contents []string) string {
c := strings.ToLower(strings.Join(contents, ""))
c = strings.Replace(c, "slackware ", "", 1)
return c
}
func getRedhatishVersion(contents []string) string {
c := strings.ToLower(strings.Join(contents, ""))
if strings.Contains(c, "rawhide") {
return "rawhide"
}
if matches := regexp.MustCompile(`release (\w[\d.]*)`).FindStringSubmatch(c); matches != nil {
return matches[1]
}
return ""
}
func getRedhatishPlatform(contents []string) string {
c := strings.ToLower(strings.Join(contents, ""))
if strings.Contains(c, "red hat") {
return "redhat"
}
f := strings.Split(c, " ")
return f[0]
}
func getSuseVersion(contents []string) string {
version := ""
for _, line := range contents {
if matches := regexp.MustCompile(`VERSION = ([\d.]+)`).FindStringSubmatch(line); matches != nil {
version = matches[1]
} else if matches := regexp.MustCompile(`PATCHLEVEL = ([\d]+)`).FindStringSubmatch(line); matches != nil {
version = version + "." + matches[1]
}
}
return version
}
func getSusePlatform(contents []string) string {
c := strings.ToLower(strings.Join(contents, ""))
if strings.Contains(c, "opensuse") {
return "opensuse"
}
return "suse"
}
func VirtualizationWithContext(ctx context.Context) (string, string, error) {
return common.VirtualizationWithContext(ctx)
}
func SensorsTemperaturesWithContext(ctx context.Context) ([]TemperatureStat, error) {
var err error
var files []string
temperatures := make([]TemperatureStat, 0)
// Only the temp*_input file provides current temperature
// value in millidegree Celsius as reported by the temperature to the device:
// https://www.kernel.org/doc/Documentation/hwmon/sysfs-interface
if files, err = filepath.Glob(common.HostSys("/class/hwmon/hwmon*/temp*_input")); err != nil {
return temperatures, err
}
if len(files) == 0 {
// CentOS has an intermediate /device directory:
// https://github.com/giampaolo/psutil/issues/971
if files, err = filepath.Glob(common.HostSys("/class/hwmon/hwmon*/device/temp*_input")); err != nil {
return temperatures, err
}
}
var warns Warnings
if len(files) == 0 { // handle distributions without hwmon, like raspbian #391, parse legacy thermal_zone files
files, err = filepath.Glob(common.HostSys("/class/thermal/thermal_zone*/"))
if err != nil {
return temperatures, err
}
for _, file := range files {
// Get the name of the temperature you are reading
name, err := ioutil.ReadFile(filepath.Join(file, "type"))
if err != nil {
warns.Add(err)
continue
}
// Get the temperature reading
current, err := ioutil.ReadFile(filepath.Join(file, "temp"))
if err != nil {
warns.Add(err)
continue
}
temperature, err := strconv.ParseInt(strings.TrimSpace(string(current)), 10, 64)
if err != nil {
warns.Add(err)
continue
}
temperatures = append(temperatures, TemperatureStat{
SensorKey: strings.TrimSpace(string(name)),
Temperature: float64(temperature) / 1000.0,
})
}
return temperatures, warns.Reference()
}
temperatures = make([]TemperatureStat, 0, len(files))
// 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 {
var raw []byte
var temperature float64
// Get the base directory location
directory := filepath.Dir(file)
// Get the base filename prefix like temp1
basename := strings.Split(filepath.Base(file), "_")[0]
// Get the base path like <dir>/temp1
basepath := filepath.Join(directory, basename)
// Get the label of the temperature you are reading
label := ""
if raw, _ = ioutil.ReadFile(basepath + "_label"); len(raw) != 0 {
// Format the label from "Core 0" to "core_0"
label = strings.Join(strings.Split(strings.TrimSpace(strings.ToLower(string(raw))), " "), "_")
}
// Get the name of the temperature you are reading
if raw, err = ioutil.ReadFile(filepath.Join(directory, "name")); err != nil {
warns.Add(err)
continue
}
name := strings.TrimSpace(string(raw))
if label != "" {
name = name + "_" + label
}
// Get the temperature reading
if raw, err = ioutil.ReadFile(file); err != nil {
warns.Add(err)
continue
}
if temperature, err = strconv.ParseFloat(strings.TrimSpace(string(raw)), 64); err != nil {
warns.Add(err)
continue
}
// Add discovered temperature sensor to the list
temperatures = append(temperatures, TemperatureStat{
SensorKey: name,
Temperature: temperature / hostTemperatureScale,
High: optionalValueReadFromFile(basepath+"_max") / hostTemperatureScale,
Critical: optionalValueReadFromFile(basepath+"_crit") / hostTemperatureScale,
})
}
return temperatures, warns.Reference()
}
func optionalValueReadFromFile(filename string) float64 {
var raw []byte
var err error
var value float64
// Check if file exists
if _, err := os.Stat(filename); os.IsNotExist(err) {
return 0
}
if raw, err = ioutil.ReadFile(filename); err != nil {
return 0
}
if value, err = strconv.ParseFloat(strings.TrimSpace(string(raw)), 64); err != nil {
return 0
}
return value
}