实现接口样例

package initsystem

import (
    "fmt"
    "os/exec"
    "strings"

    "k8s.io/kubernetes/cmd/kubeadm/app/util/initsystem"
)

type InitSystem interface {
    // ServiceEnable tries to enable a specific service
    ServiceEnable(service string) error
    initsystem.InitSystem
}

type initSystem struct {
    initsystem.InitSystem
}

func (s *initSystem) ServiceEnable(service string) error {
    cmd := s.InitSystem.EnableCommand(service)
    parts := strings.Split(cmd, " ")
    if parts[0] == "systemctl" {
       if err := exec.Command("systemctl", "daemon-reload").Run(); err != nil {
          return fmt.Errorf("failed to reload init system: %v", err)
       }
    }
    args := parts[1:]
    // nosemgrep: go.lang.security.audit.dangerous-exec-command.dangerous-exec-command
    return exec.Command(parts[0], args...).Run()
}

func GetInitSystem() (InitSystem, error) {
    is, err := initsystem.GetInitSystem()
    if err != nil {
       return nil, err
    }
    return &initSystem{is}, nil
}