如何在golang中找到sshd服务状态

问题描述：

i have the following code

package main

import (
    "os/exec"
    "fmt"
    "os"
)

func main() {
    cmd := exec.Command("systemctl", "check", "sshd")
    out, err := cmd.CombinedOutput()
    if err != nil {
        fmt.Println("Cannot find process")
        os.Exit(1)
    }
    fmt.Printf("Status is: %s", string(out))
    fmt.Println("Starting Role")

If the service is down, program will exit, althrough i would like to get its status ( 'down' , 'inactive', etc)

If the service is up, program will not exit and will print ' active ' output

Any hints, please ?

我有以下代码 p>

 包main 
 \  nimport（
“ os / exec” 
“ fmt” 
“ os” 
）
 
func main（）{
 cmd：= exec.Command（“ systemctl”，“ check”，“ sshd”  ）
输出，错误：= cmd.CombinedOutput（）
，如果错误！= nil {
 fmt.Println（“无法找到进程”）
 os.Exit（1）
} 
 fmt.Printf（  “状态为：％s”，字符串（输出））
 fmt.Println（“起始角色”）
  code>  pre> 
 
 如果服务关闭，程序将退出 ，直到我一直想获得其状态（“关闭”，“无效”等） p> 
 
 
如果该服务已启动，程序将不会退出，并且会显示“有效”输出  p> 
 
 
有任何提示吗？ p> 
  div>

答

You're exiting if exec.Command returns an error, but you're not checking the type of error returned. Per the docs:

If the command starts but does not complete successfully, the error is of type *ExitError. Other error types may be returned for other situations.

Rather than just exiting, you should check if the error corresponds to a non-zero exit code from systemctl or a problem running it. This can be done with the following:

func main() {
  cmd := exec.Command("systemctl", "check", "sshd")
  out, err := cmd.CombinedOutput()
  if err != nil {
    if exitErr, ok := err.(*exec.ExitError); ok {
      fmt.Printf("systemctl finished with non-zero: %v
", exitErr)
    } else {
      fmt.Printf("failed to run systemctl: %v", err)
      os.Exit(1)
    }
  }
  fmt.Printf("Status is: %s
", string(out))
}

如何在golang中找到sshd服务状态

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