511 lines
14 KiB
Go
511 lines
14 KiB
Go
package home
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import (
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"fmt"
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"io/ioutil"
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"os"
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"runtime"
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"strconv"
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"strings"
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"syscall"
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"github.com/AdguardTeam/AdGuardHome/util"
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"github.com/AdguardTeam/golibs/log"
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"github.com/kardianos/service"
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)
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const (
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launchdStdoutPath = "/var/log/AdGuardHome.stdout.log"
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launchdStderrPath = "/var/log/AdGuardHome.stderr.log"
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serviceName = "AdGuardHome"
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serviceDisplayName = "AdGuard Home service"
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serviceDescription = "AdGuard Home: Network-level blocker"
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)
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// Represents the program that will be launched by a service or daemon
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type program struct {
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}
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// Start should quickly start the program
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func (p *program) Start(s service.Service) error {
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// Start should not block. Do the actual work async.
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args := options{runningAsService: true}
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go run(args)
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return nil
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}
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// Stop stops the program
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func (p *program) Stop(s service.Service) error {
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// Stop should not block. Return with a few seconds.
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if Context.appSignalChannel == nil {
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os.Exit(0)
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}
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Context.appSignalChannel <- syscall.SIGINT
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return nil
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}
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// Check the service's status
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// Note: on OpenWrt 'service' utility may not exist - we use our service script directly in this case.
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func svcStatus(s service.Service) (service.Status, error) {
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status, err := s.Status()
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if err != nil && service.Platform() == "unix-systemv" {
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code, err := runInitdCommand("status")
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if err != nil {
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return service.StatusStopped, nil
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}
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if code != 0 {
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return service.StatusStopped, nil
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}
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return service.StatusRunning, nil
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}
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return status, err
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}
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// Perform an action on the service
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// Note: on OpenWrt 'service' utility may not exist - we use our service script directly in this case.
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func svcAction(s service.Service, action string) error {
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err := service.Control(s, action)
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if err != nil && service.Platform() == "unix-systemv" &&
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(action == "start" || action == "stop" || action == "restart") {
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_, err := runInitdCommand(action)
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return err
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}
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return err
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}
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// Send SIGHUP to a process with ID taken from our pid-file
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// If pid-file doesn't exist, find our PID using 'ps' command
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func sendSigReload() {
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if runtime.GOOS == "windows" {
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log.Error("Not implemented on Windows")
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return
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}
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pidfile := fmt.Sprintf("/var/run/%s.pid", serviceName)
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data, err := ioutil.ReadFile(pidfile)
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if os.IsNotExist(err) {
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code, psdata, err := util.RunCommand("ps", "-C", serviceName, "-o", "pid=")
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if err != nil || code != 0 {
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log.Error("Can't find AdGuardHome process: %s code:%d", err, code)
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return
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}
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data = []byte(psdata)
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} else if err != nil {
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log.Error("Can't read PID file %s: %s", pidfile, err)
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return
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}
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parts := strings.SplitN(string(data), "\n", 2)
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if len(parts) == 0 {
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log.Error("Can't read PID file %s: bad value", pidfile)
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return
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}
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pid, err := strconv.Atoi(parts[0])
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if err != nil {
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log.Error("Can't read PID file %s: %s", pidfile, err)
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return
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}
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err = util.SendProcessSignal(pid, syscall.SIGHUP)
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if err != nil {
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log.Error("Can't send signal to PID %d: %s", pid, err)
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return
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}
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log.Debug("Sent signal to PID %d", pid)
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}
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// handleServiceControlAction one of the possible control actions:
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// install -- installs a service/daemon
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// uninstall -- uninstalls it
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// status -- prints the service status
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// start -- starts the previously installed service
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// stop -- stops the previously installed service
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// restart - restarts the previously installed service
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// run - this is a special command that is not supposed to be used directly
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// it is specified when we register a service, and it indicates to the app
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// that it is being run as a service/daemon.
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func handleServiceControlAction(action string) {
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log.Printf("Service control action: %s", action)
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if action == "reload" {
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sendSigReload()
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return
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}
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pwd, err := os.Getwd()
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if err != nil {
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log.Fatal("Unable to find the path to the current directory")
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}
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svcConfig := &service.Config{
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Name: serviceName,
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DisplayName: serviceDisplayName,
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Description: serviceDescription,
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WorkingDirectory: pwd,
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Arguments: []string{"-s", "run"},
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}
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configureService(svcConfig)
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prg := &program{}
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s, err := service.New(prg, svcConfig)
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if err != nil {
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log.Fatal(err)
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}
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if action == "status" {
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handleServiceStatusCommand(s)
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} else if action == "run" {
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err = s.Run()
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if err != nil {
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log.Fatalf("Failed to run service: %s", err)
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}
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} else if action == "install" {
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handleServiceInstallCommand(s)
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} else if action == "uninstall" {
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handleServiceUninstallCommand(s)
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} else {
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err = svcAction(s, action)
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if err != nil {
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log.Fatal(err)
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}
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}
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log.Printf("Action %s has been done successfully on %s", action, service.ChosenSystem().String())
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}
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// handleServiceStatusCommand handles service "status" command
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func handleServiceStatusCommand(s service.Service) {
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status, errSt := svcStatus(s)
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if errSt != nil {
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log.Fatalf("failed to get service status: %s", errSt)
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}
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switch status {
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case service.StatusUnknown:
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log.Printf("Service status is unknown")
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case service.StatusStopped:
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log.Printf("Service is stopped")
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case service.StatusRunning:
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log.Printf("Service is running")
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}
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}
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// handleServiceStatusCommand handles service "install" command
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func handleServiceInstallCommand(s service.Service) {
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err := svcAction(s, "install")
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if err != nil {
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log.Fatal(err)
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}
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if util.IsOpenWrt() {
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// On OpenWrt it is important to run enable after the service installation
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// Otherwise, the service won't start on the system startup
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_, err := runInitdCommand("enable")
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if err != nil {
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log.Fatal(err)
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}
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}
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// Start automatically after install
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err = svcAction(s, "start")
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if err != nil {
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log.Fatalf("Failed to start the service: %s", err)
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}
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log.Printf("Service has been started")
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if detectFirstRun() {
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log.Printf(`Almost ready!
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AdGuard Home is successfully installed and will automatically start on boot.
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There are a few more things that must be configured before you can use it.
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Click on the link below and follow the Installation Wizard steps to finish setup.`)
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printHTTPAddresses("http")
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}
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}
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// handleServiceStatusCommand handles service "uninstall" command
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func handleServiceUninstallCommand(s service.Service) {
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if util.IsOpenWrt() {
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// On OpenWrt it is important to run disable command first
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// as it will remove the symlink
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_, err := runInitdCommand("disable")
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if err != nil {
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log.Fatal(err)
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}
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}
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err := svcAction(s, "uninstall")
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if err != nil {
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log.Fatal(err)
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}
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if runtime.GOOS == "darwin" {
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// Removing log files on cleanup and ignore errors
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err := os.Remove(launchdStdoutPath)
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if err != nil && !os.IsNotExist(err) {
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log.Printf("cannot remove %s", launchdStdoutPath)
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}
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err = os.Remove(launchdStderrPath)
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if err != nil && !os.IsNotExist(err) {
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log.Printf("cannot remove %s", launchdStderrPath)
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}
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}
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}
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// configureService defines additional settings of the service
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func configureService(c *service.Config) {
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c.Option = service.KeyValue{}
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// OS X
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// Redefines the launchd config file template
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// The purpose is to enable stdout/stderr redirect by default
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c.Option["LaunchdConfig"] = launchdConfig
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// This key is used to start the job as soon as it has been loaded. For daemons this means execution at boot time, for agents execution at login.
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c.Option["RunAtLoad"] = true
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// POSIX
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// Redirect StdErr & StdOut to files.
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c.Option["LogOutput"] = true
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// Use modified service file templates
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c.Option["SystemdScript"] = systemdScript
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c.Option["SysvScript"] = sysvScript
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// On OpenWrt we're using a different type of sysvScript
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if util.IsOpenWrt() {
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c.Option["SysvScript"] = openWrtScript
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} else if util.IsFreeBSD() {
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c.Option["SysvScript"] = freeBSDScript
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}
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}
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// runInitdCommand runs init.d service command
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// returns command code or error if any
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func runInitdCommand(action string) (int, error) {
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confPath := "/etc/init.d/" + serviceName
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code, _, err := util.RunCommand("sh", "-c", confPath+" "+action)
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return code, err
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}
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// Basically the same template as the one defined in github.com/kardianos/service
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// but with two additional keys - StandardOutPath and StandardErrorPath
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var launchdConfig = `<?xml version='1.0' encoding='UTF-8'?>
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<!DOCTYPE plist PUBLIC "-//Apple Computer//DTD PLIST 1.0//EN"
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"http://www.apple.com/DTDs/PropertyList-1.0.dtd" >
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<plist version='1.0'>
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<dict>
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<key>Label</key><string>{{html .Name}}</string>
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<key>ProgramArguments</key>
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<array>
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<string>{{html .Path}}</string>
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{{range .Config.Arguments}}
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<string>{{html .}}</string>
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{{end}}
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</array>
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{{if .UserName}}<key>UserName</key><string>{{html .UserName}}</string>{{end}}
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{{if .ChRoot}}<key>RootDirectory</key><string>{{html .ChRoot}}</string>{{end}}
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{{if .WorkingDirectory}}<key>WorkingDirectory</key><string>{{html .WorkingDirectory}}</string>{{end}}
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<key>SessionCreate</key><{{bool .SessionCreate}}/>
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<key>KeepAlive</key><{{bool .KeepAlive}}/>
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<key>RunAtLoad</key><{{bool .RunAtLoad}}/>
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<key>Disabled</key><false/>
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<key>StandardOutPath</key>
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<string>` + launchdStdoutPath + `</string>
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<key>StandardErrorPath</key>
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<string>` + launchdStderrPath + `</string>
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</dict>
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</plist>
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`
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// Note: we should keep it in sync with the template from service_systemd_linux.go file
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// Add "After=" setting for systemd service file, because we must be started only after network is online
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// Set "RestartSec" to 10
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const systemdScript = `[Unit]
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Description={{.Description}}
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ConditionFileIsExecutable={{.Path|cmdEscape}}
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After=syslog.target network-online.target
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[Service]
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StartLimitInterval=5
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StartLimitBurst=10
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ExecStart={{.Path|cmdEscape}}{{range .Arguments}} {{.|cmd}}{{end}}
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{{if .ChRoot}}RootDirectory={{.ChRoot|cmd}}{{end}}
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{{if .WorkingDirectory}}WorkingDirectory={{.WorkingDirectory|cmdEscape}}{{end}}
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{{if .UserName}}User={{.UserName}}{{end}}
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{{if .ReloadSignal}}ExecReload=/bin/kill -{{.ReloadSignal}} "$MAINPID"{{end}}
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{{if .PIDFile}}PIDFile={{.PIDFile|cmd}}{{end}}
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{{if and .LogOutput .HasOutputFileSupport -}}
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StandardOutput=file:/var/log/{{.Name}}.out
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StandardError=file:/var/log/{{.Name}}.err
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{{- end}}
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Restart=always
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RestartSec=10
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EnvironmentFile=-/etc/sysconfig/{{.Name}}
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[Install]
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WantedBy=multi-user.target
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`
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// Note: we should keep it in sync with the template from service_sysv_linux.go file
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// Use "ps | grep -v grep | grep $(get_pid)" because "ps PID" may not work on OpenWrt
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const sysvScript = `#!/bin/sh
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# For RedHat and cousins:
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# chkconfig: - 99 01
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# description: {{.Description}}
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# processname: {{.Path}}
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### BEGIN INIT INFO
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# Provides: {{.Path}}
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# Required-Start:
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# Required-Stop:
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# Default-Start: 2 3 4 5
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# Default-Stop: 0 1 6
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# Short-Description: {{.DisplayName}}
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# Description: {{.Description}}
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### END INIT INFO
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cmd="{{.Path}}{{range .Arguments}} {{.|cmd}}{{end}}"
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name=$(basename $(readlink -f $0))
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pid_file="/var/run/$name.pid"
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stdout_log="/var/log/$name.log"
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stderr_log="/var/log/$name.err"
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[ -e /etc/sysconfig/$name ] && . /etc/sysconfig/$name
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get_pid() {
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cat "$pid_file"
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}
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is_running() {
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[ -f "$pid_file" ] && ps | grep -v grep | grep $(get_pid) > /dev/null 2>&1
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}
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case "$1" in
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start)
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if is_running; then
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echo "Already started"
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else
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echo "Starting $name"
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{{if .WorkingDirectory}}cd '{{.WorkingDirectory}}'{{end}}
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$cmd >> "$stdout_log" 2>> "$stderr_log" &
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echo $! > "$pid_file"
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if ! is_running; then
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echo "Unable to start, see $stdout_log and $stderr_log"
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exit 1
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fi
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fi
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;;
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stop)
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if is_running; then
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echo -n "Stopping $name.."
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kill $(get_pid)
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for i in $(seq 1 10)
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do
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if ! is_running; then
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break
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fi
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echo -n "."
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sleep 1
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done
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echo
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if is_running; then
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echo "Not stopped; may still be shutting down or shutdown may have failed"
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exit 1
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else
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echo "Stopped"
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if [ -f "$pid_file" ]; then
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rm "$pid_file"
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fi
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fi
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else
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echo "Not running"
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fi
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;;
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restart)
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$0 stop
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if is_running; then
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echo "Unable to stop, will not attempt to start"
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exit 1
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fi
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$0 start
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;;
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status)
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if is_running; then
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echo "Running"
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else
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echo "Stopped"
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exit 1
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fi
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;;
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*)
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echo "Usage: $0 {start|stop|restart|status}"
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exit 1
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;;
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esac
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exit 0
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`
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// OpenWrt procd init script
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// https://github.com/AdguardTeam/AdGuardHome/issues/1386
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const openWrtScript = `#!/bin/sh /etc/rc.common
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USE_PROCD=1
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START=95
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STOP=01
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cmd="{{.Path}}{{range .Arguments}} {{.|cmd}}{{end}}"
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name="{{.Name}}"
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pid_file="/var/run/${name}.pid"
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start_service() {
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echo "Starting ${name}"
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procd_open_instance
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procd_set_param command ${cmd}
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procd_set_param respawn # respawn automatically if something died
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procd_set_param stdout 1 # forward stdout of the command to logd
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procd_set_param stderr 1 # same for stderr
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procd_set_param pidfile ${pid_file} # write a pid file on instance start and remove it on stop
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procd_close_instance
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echo "${name} has been started"
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}
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stop_service() {
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echo "Stopping ${name}"
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}
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EXTRA_COMMANDS="status"
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EXTRA_HELP=" status Print the service status"
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get_pid() {
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cat "${pid_file}"
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}
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is_running() {
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[ -f "${pid_file}" ] && ps | grep -v grep | grep $(get_pid) >/dev/null 2>&1
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}
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status() {
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if is_running; then
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echo "Running"
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else
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echo "Stopped"
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exit 1
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fi
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}
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`
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const freeBSDScript = `#!/bin/sh
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# PROVIDE: {{.Name}}
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# REQUIRE: networking
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# KEYWORD: shutdown
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. /etc/rc.subr
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name="{{.Name}}"
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{{.Name}}_env="IS_DAEMON=1"
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{{.Name}}_user="root"
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pidfile="/var/run/${name}.pid"
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command="/usr/sbin/daemon"
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command_args="-P ${pidfile} -r -f {{.WorkingDirectory}}/{{.Name}}"
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run_rc_command "$1"
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`
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