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service.go
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service.go
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package cli
import (
"bytes"
"errors"
"fmt"
"os"
"os/exec"
"github.com/kardianos/service"
"github.com/Control-D-Inc/ctrld/internal/router"
)
// newService wraps service.New call to return service.Service
// wrapper which is suitable for the current platform.
func newService(i service.Interface, c *service.Config) (service.Service, error) {
s, err := service.New(i, c)
if err != nil {
return nil, err
}
switch {
case router.IsOldOpenwrt():
return &procd{&sysV{s}}, nil
case router.IsGLiNet():
return &sysV{s}, nil
case s.Platform() == "unix-systemv":
return &sysV{s}, nil
case s.Platform() == "linux-systemd":
return &systemd{s}, nil
}
return s, nil
}
// sysV wraps a service.Service, and provide start/stop/status command
// base on "/etc/init.d/<service_name>".
//
// Use this on system where "service" command is not available, like GL.iNET router.
type sysV struct {
service.Service
}
func (s *sysV) installed() bool {
fi, err := os.Stat("/etc/init.d/ctrld")
if err != nil {
return false
}
mode := fi.Mode()
return mode.IsRegular() && (mode&0111) != 0
}
func (s *sysV) Start() error {
if !s.installed() {
return service.ErrNotInstalled
}
_, err := exec.Command("/etc/init.d/ctrld", "start").CombinedOutput()
return err
}
func (s *sysV) Stop() error {
if !s.installed() {
return service.ErrNotInstalled
}
_, err := exec.Command("/etc/init.d/ctrld", "stop").CombinedOutput()
return err
}
func (s *sysV) Restart() error {
if !s.installed() {
return service.ErrNotInstalled
}
// We don't care about error returned by s.Stop,
// because the service may already be stopped.
_ = s.Stop()
return s.Start()
}
func (s *sysV) Status() (service.Status, error) {
if !s.installed() {
return service.StatusUnknown, service.ErrNotInstalled
}
return unixSystemVServiceStatus()
}
// procd wraps a service.Service, and provide start/stop command
// base on "/etc/init.d/<service_name>", status command base on parsing "ps" command output.
//
// Use this on system where "/etc/init.d/<service_name> status" command is not available,
// like old GL.iNET Opal router.
type procd struct {
*sysV
}
func (s *procd) Status() (service.Status, error) {
if !s.installed() {
return service.StatusUnknown, service.ErrNotInstalled
}
exe, err := os.Executable()
if err != nil {
return service.StatusUnknown, nil
}
// Looking for something like "/sbin/ctrld run ".
shellCmd := fmt.Sprintf("ps | grep -q %q", exe+" [r]un ")
if err := exec.Command("sh", "-c", shellCmd).Run(); err != nil {
return service.StatusStopped, nil
}
return service.StatusRunning, nil
}
// procd wraps a service.Service, and provide status command to
// report the status correctly.
type systemd struct {
service.Service
}
func (s *systemd) Status() (service.Status, error) {
out, _ := exec.Command("systemctl", "status", "ctrld").CombinedOutput()
if bytes.Contains(out, []byte("/FAILURE)")) {
return service.StatusStopped, nil
}
return s.Service.Status()
}
type task struct {
f func() error
abortOnError bool
}
func doTasks(tasks []task) bool {
var prevErr error
for _, task := range tasks {
if err := task.f(); err != nil {
if task.abortOnError {
mainLog.Load().Error().Msg(errors.Join(prevErr, err).Error())
return false
}
prevErr = err
}
}
return true
}
func checkHasElevatedPrivilege() {
ok, err := hasElevatedPrivilege()
if err != nil {
mainLog.Load().Error().Msgf("could not detect user privilege: %v", err)
return
}
if !ok {
mainLog.Load().Error().Msg("Please relaunch process with admin/root privilege.")
os.Exit(1)
}
}
func unixSystemVServiceStatus() (service.Status, error) {
out, err := exec.Command("/etc/init.d/ctrld", "status").CombinedOutput()
if err != nil {
return service.StatusUnknown, nil
}
switch string(bytes.ToLower(bytes.TrimSpace(out))) {
case "running":
return service.StatusRunning, nil
default:
return service.StatusStopped, nil
}
}