golang 获取NTP服务器时间并自动设置
go 修改操作系统时间
https://www.cnblogs.com/Kingram/p/12627709.html
go 作为 ntp 客户端接收时间
https://github.com/vladimirvivien/go-ntp-client/blob/master/time.go
package main
import (
"encoding/binary"
"flag"
"fmt"
"log"
"net"
"runtime"
"time"
"github.com/gogf/gf/os/glog"
"github.com/gogf/gf/os/gproc"
"github.com/gogf/gf/text/gstr"
)
const ntpEpochOffset = 2208988800
type packet struct {
Settings uint8
Stratum uint8
Poll int8
Precision int8
RootDelay uint32
RootDispersion uint32
ReferenceID uint32
RefTimeSec uint32
RefTimeFrac uint32
OrigTimeSec uint32
OrigTimeFrac uint32
RxTimeSec uint32
RxTimeFrac uint32
TxTimeSec uint32
TxTimeFrac uint32
}
func main() {
var timeLayoutStr = "2006-01-02 15:04:05"
ntime := getremotetime()
ts := ntime.Format(timeLayoutStr) //time转string
fmt.Print(ts)
// 2021-08-29 15:53:35.922579627 +0800 CST
UpdateSystemDate(ts)
}
func getremotetime() time.Time {
var host string
// 182.92.12.11:123 是阿里的ntp服务器，可以换成其他域名的
flag.StringVar(&host, "e", "time.windows.com:123", "NTP host")
flag.Parse()
conn, err := net.Dial("udp", host)
if err != nil {
log.Fatalf("failed to connect: %v", err)
}
defer conn.Close()
if err := conn.SetDeadline(time.Now().Add(15 * time.Second)); err != nil {
log.Fatalf("failed to set deadline: %v", err)
}
req := &packet{Settings: 0x1B}
if err := binary.Write(conn, binary.BigEndian, req); err != nil {
log.Fatalf("failed to send request: %v", err)
}
rsp := &packet{}
if err := binary.Read(conn, binary.BigEndian, rsp); err != nil {
log.Fatalf("failed to read server response: %v", err)
}
secs := float64(rsp.TxTimeSec) - ntpEpochOffset
nanos := (int64(rsp.TxTimeFrac) * 1e9) >> 32
showtime := time.Unix(int64(secs), nanos)
return showtime
}
func UpdateSystemDate(dateTime string) bool {
system := runtime.GOOS
switch system {
case "windows":
{
_, err1 := gproc.ShellExec(`date ` + gstr.Split(dateTime, " ")[0])
_, err2 := gproc.ShellExec(`time ` + gstr.Split(dateTime, " ")[1])
if err1 != nil && err2 != nil {
glog.Info("更新系统时间错误:请用管理员身份启动程序!")
return false
}
return true
}
case "linux":
{
_, err1 := gproc.ShellExec(`date -s "` + dateTime + `"`)
if err1 != nil {
glog.Info("更新系统时间错误:", err1.Error())
return false
}
return true
}
case "darwin":
{
_, err1 := gproc.ShellExec(`date -s "` + dateTime + `"`)
if err1 != nil {
glog.Info("更新系统时间错误:", err1.Error())
return false
}
return true
}
}
return false
}
