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1db46919ab
Due to a bug in Go (golang/go#51778), cmd/go doesn't warn about your Go version being older than the go.mod's declared Go version in that case that package loading fails before the build starts, such as when you use packages that are only in the current version of Go, like our use of net/netip. This change works around that Go bug by adding build tags and a pre-Go1.18-only file that will cause Go 1.17 and earlier to fail like: $ ~/sdk/go1.17/bin/go install ./cmd/tailscaled # tailscale.com/cmd/tailscaled ./required_version.go:11:2: undefined: you_need_Go_1_18_to_compile_Tailscale note: module requires Go 1.18 Change-Id: I39f5820de646703e19dde448dd86a7022252f75c Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
127 lines
3.2 KiB
Go
127 lines
3.2 KiB
Go
// Copyright (c) 2021 Tailscale Inc & AUTHORS All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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//go:build go1.18
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// +build go1.18
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package main
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import (
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"context"
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"errors"
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"fmt"
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"os"
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"time"
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"golang.org/x/sys/windows"
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"golang.org/x/sys/windows/svc"
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"golang.org/x/sys/windows/svc/mgr"
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"tailscale.com/logtail/backoff"
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"tailscale.com/types/logger"
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"tailscale.com/util/osshare"
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)
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func init() {
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installSystemDaemon = installSystemDaemonWindows
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uninstallSystemDaemon = uninstallSystemDaemonWindows
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}
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func installSystemDaemonWindows(args []string) (err error) {
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m, err := mgr.Connect()
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if err != nil {
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return fmt.Errorf("failed to connect to Windows service manager: %v", err)
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}
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service, err := m.OpenService(serviceName)
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if err == nil {
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service.Close()
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return fmt.Errorf("service %q is already installed", serviceName)
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}
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// no such service; proceed to install the service.
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exe, err := os.Executable()
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if err != nil {
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return err
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}
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c := mgr.Config{
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ServiceType: windows.SERVICE_WIN32_OWN_PROCESS,
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StartType: mgr.StartAutomatic,
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ErrorControl: mgr.ErrorNormal,
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DisplayName: serviceName,
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Description: "Connects this computer to others on the Tailscale network.",
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}
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service, err = m.CreateService(serviceName, exe, c)
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if err != nil {
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return fmt.Errorf("failed to create %q service: %v", serviceName, err)
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}
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defer service.Close()
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// Exponential backoff is often too aggressive, so use (mostly)
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// squares instead.
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ra := []mgr.RecoveryAction{
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{mgr.ServiceRestart, 1 * time.Second},
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{mgr.ServiceRestart, 2 * time.Second},
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{mgr.ServiceRestart, 4 * time.Second},
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{mgr.ServiceRestart, 9 * time.Second},
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{mgr.ServiceRestart, 16 * time.Second},
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{mgr.ServiceRestart, 25 * time.Second},
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{mgr.ServiceRestart, 36 * time.Second},
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{mgr.ServiceRestart, 49 * time.Second},
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{mgr.ServiceRestart, 64 * time.Second},
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}
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const resetPeriodSecs = 60
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err = service.SetRecoveryActions(ra, resetPeriodSecs)
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if err != nil {
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return fmt.Errorf("failed to set service recovery actions: %v", err)
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}
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return nil
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}
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func uninstallSystemDaemonWindows(args []string) (ret error) {
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// Remove file sharing from Windows shell (noop in non-windows)
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osshare.SetFileSharingEnabled(false, logger.Discard)
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m, err := mgr.Connect()
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if err != nil {
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return fmt.Errorf("failed to connect to Windows service manager: %v", err)
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}
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defer m.Disconnect()
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service, err := m.OpenService(serviceName)
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if err != nil {
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return fmt.Errorf("failed to open %q service: %v", serviceName, err)
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}
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st, err := service.Query()
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if err != nil {
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service.Close()
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return fmt.Errorf("failed to query service state: %v", err)
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}
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if st.State != svc.Stopped {
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service.Control(svc.Stop)
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}
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err = service.Delete()
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service.Close()
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if err != nil {
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return fmt.Errorf("failed to delete service: %v", err)
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}
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bo := backoff.NewBackoff("uninstall", logger.Discard, 30*time.Second)
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end := time.Now().Add(15 * time.Second)
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for time.Until(end) > 0 {
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service, err = m.OpenService(serviceName)
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if err != nil {
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// service is no longer openable; success!
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break
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}
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service.Close()
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bo.BackOff(context.Background(), errors.New("service not deleted"))
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}
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return nil
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}
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