open-consul/vendor/github.com/shirou/gopsutil/host/host_freebsd.go

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// +build freebsd
package host
import (
"bytes"
"context"
"encoding/binary"
"io/ioutil"
"os"
"runtime"
"strings"
"sync/atomic"
"syscall"
"time"
"unsafe"
"github.com/shirou/gopsutil/internal/common"
"github.com/shirou/gopsutil/process"
"golang.org/x/sys/unix"
)
const (
UTNameSize = 16 /* see MAXLOGNAME in <sys/param.h> */
UTLineSize = 8
UTHostSize = 16
)
func Info() (*InfoStat, error) {
return InfoWithContext(context.Background())
}
func InfoWithContext(ctx context.Context) (*InfoStat, error) {
ret := &InfoStat{
OS: runtime.GOOS,
PlatformFamily: "freebsd",
}
hostname, err := os.Hostname()
if err == nil {
ret.Hostname = hostname
}
platform, family, version, err := PlatformInformation()
if err == nil {
ret.Platform = platform
ret.PlatformFamily = family
ret.PlatformVersion = version
ret.KernelVersion = version
}
system, role, err := Virtualization()
if err == nil {
ret.VirtualizationSystem = system
ret.VirtualizationRole = role
}
boot, err := BootTime()
if err == nil {
ret.BootTime = boot
ret.Uptime = uptime(boot)
}
procs, err := process.Pids()
if err == nil {
ret.Procs = uint64(len(procs))
}
hostid, err := unix.Sysctl("kern.hostuuid")
if err == nil && hostid != "" {
ret.HostID = strings.ToLower(hostid)
}
return ret, nil
}
// cachedBootTime must be accessed via atomic.Load/StoreUint64
var cachedBootTime uint64
func BootTime() (uint64, error) {
return BootTimeWithContext(context.Background())
}
func BootTimeWithContext(ctx context.Context) (uint64, error) {
t := atomic.LoadUint64(&cachedBootTime)
if t != 0 {
return t, nil
}
buf, err := unix.SysctlRaw("kern.boottime")
if err != nil {
return 0, err
}
tv := *(*syscall.Timeval)(unsafe.Pointer((&buf[0])))
atomic.StoreUint64(&cachedBootTime, uint64(tv.Sec))
return t, nil
}
func uptime(boot uint64) uint64 {
return uint64(time.Now().Unix()) - boot
}
func Uptime() (uint64, error) {
return UptimeWithContext(context.Background())
}
func UptimeWithContext(ctx context.Context) (uint64, error) {
boot, err := BootTime()
if err != nil {
return 0, err
}
return uptime(boot), nil
}
func Users() ([]UserStat, error) {
return UsersWithContext(context.Background())
}
func UsersWithContext(ctx context.Context) ([]UserStat, error) {
utmpfile := "/var/run/utx.active"
if !common.PathExists(utmpfile) {
utmpfile = "/var/run/utmp" // before 9.0
return getUsersFromUtmp(utmpfile)
}
var ret []UserStat
file, err := os.Open(utmpfile)
if err != nil {
return ret, err
}
defer file.Close()
buf, err := ioutil.ReadAll(file)
if err != nil {
return ret, err
}
entrySize := sizeOfUtmpx
count := len(buf) / entrySize
for i := 0; i < count; i++ {
b := buf[i*sizeOfUtmpx : (i+1)*sizeOfUtmpx]
var u Utmpx
br := bytes.NewReader(b)
err := binary.Read(br, binary.LittleEndian, &u)
if err != nil || u.Type != 4 {
continue
}
sec := (binary.LittleEndian.Uint32(u.Tv.Sec[:])) / 2 // TODO:
user := UserStat{
User: common.IntToString(u.User[:]),
Terminal: common.IntToString(u.Line[:]),
Host: common.IntToString(u.Host[:]),
Started: int(sec),
}
ret = append(ret, user)
}
return ret, nil
}
func PlatformInformation() (string, string, string, error) {
return PlatformInformationWithContext(context.Background())
}
func PlatformInformationWithContext(ctx context.Context) (string, string, string, error) {
platform, err := unix.Sysctl("kern.ostype")
if err != nil {
return "", "", "", err
}
version, err := unix.Sysctl("kern.osrelease")
if err != nil {
return "", "", "", err
}
return strings.ToLower(platform), "", strings.ToLower(version), nil
}
func Virtualization() (string, string, error) {
return VirtualizationWithContext(context.Background())
}
func VirtualizationWithContext(ctx context.Context) (string, string, error) {
return "", "", common.ErrNotImplementedError
}
// before 9.0
func getUsersFromUtmp(utmpfile string) ([]UserStat, error) {
var ret []UserStat
file, err := os.Open(utmpfile)
if err != nil {
return ret, err
}
defer file.Close()
buf, err := ioutil.ReadAll(file)
if err != nil {
return ret, err
}
u := Utmp{}
entrySize := int(unsafe.Sizeof(u))
count := len(buf) / entrySize
for i := 0; i < count; i++ {
b := buf[i*entrySize : i*entrySize+entrySize]
var u Utmp
br := bytes.NewReader(b)
err := binary.Read(br, binary.LittleEndian, &u)
if err != nil || u.Time == 0 {
continue
}
user := UserStat{
User: common.IntToString(u.Name[:]),
Terminal: common.IntToString(u.Line[:]),
Host: common.IntToString(u.Host[:]),
Started: int(u.Time),
}
ret = append(ret, user)
}
return ret, nil
}
func SensorsTemperatures() ([]TemperatureStat, error) {
return SensorsTemperaturesWithContext(context.Background())
}
func SensorsTemperaturesWithContext(ctx context.Context) ([]TemperatureStat, error) {
return []TemperatureStat{}, common.ErrNotImplementedError
}
func KernelVersion() (string, error) {
return KernelVersionWithContext(context.Background())
}
func KernelVersionWithContext(ctx context.Context) (string, error) {
_, _, version, err := PlatformInformation()
return version, err
}