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// Copyright 2012 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
//go:build windows
// +build windows
package svc_test
import (
"fmt"
"io/ioutil"
"math/rand"
"os"
"os/exec"
"path/filepath"
"strings"
"testing"
"time"
"golang.org/x/sys/windows/svc"
"golang.org/x/sys/windows/svc/mgr"
)
func getState(t *testing.T, s *mgr.Service) svc.State {
status, err := s.Query()
if err != nil {
t.Fatalf("Query(%s) failed: %s", s.Name, err)
}
return status.State
}
func testState(t *testing.T, s *mgr.Service, want svc.State) {
have := getState(t, s)
if have != want {
t.Fatalf("%s state is=%d want=%d", s.Name, have, want)
}
}
func waitState(t *testing.T, s *mgr.Service, want svc.State) {
for i := 0; ; i++ {
have := getState(t, s)
if have == want {
return
}
if i > 10 {
t.Fatalf("%s state is=%d, waiting timeout", s.Name, have)
}
time.Sleep(300 * time.Millisecond)
}
}
// stopAndDeleteIfInstalled stops and deletes service name,
// if the service is running and / or installed.
func stopAndDeleteIfInstalled(t *testing.T, m *mgr.Mgr, name string) {
s, err := m.OpenService(name)
if err != nil {
// Service is not installed.
return
}
defer s.Close()
// Make sure the service is not running, otherwise we won't be able to delete it.
if getState(t, s) == svc.Running {
_, err = s.Control(svc.Stop)
if err != nil {
t.Fatalf("Control(%s) failed: %s", s.Name, err)
}
waitState(t, s, svc.Stopped)
}
err = s.Delete()
if err != nil {
t.Fatalf("Delete failed: %s", err)
}
}
func TestExample(t *testing.T) {
if testing.Short() && os.Getenv("GO_BUILDER_NAME") != "" {
t.Skip("skipping test in short mode - it modifies system services")
}
const name = "myservice"
m, err := mgr.Connect()
if err != nil {
t.Fatalf("SCM connection failed: %s", err)
}
defer m.Disconnect()
dir, err := ioutil.TempDir("", "svc")
if err != nil {
t.Fatalf("failed to create temp directory: %v", err)
}
defer os.RemoveAll(dir)
exepath := filepath.Join(dir, "a.exe")
o, err := exec.Command("go", "build", "-o", exepath, "golang.org/x/sys/windows/svc/example").CombinedOutput()
if err != nil {
t.Fatalf("failed to build service program: %v\n%v", err, string(o))
}
stopAndDeleteIfInstalled(t, m, name)
s, err := m.CreateService(name, exepath, mgr.Config{DisplayName: "my service"}, "is", "auto-started")
if err != nil {
t.Fatalf("CreateService(%s) failed: %v", name, err)
}
defer s.Close()
args := []string{"is", "manual-started", fmt.Sprintf("%d", rand.Int())}
testState(t, s, svc.Stopped)
err = s.Start(args...)
if err != nil {
t.Fatalf("Start(%s) failed: %s", s.Name, err)
}
waitState(t, s, svc.Running)
time.Sleep(1 * time.Second)
// testing deadlock from issues 4.
_, err = s.Control(svc.Interrogate)
if err != nil {
t.Fatalf("Control(%s) failed: %s", s.Name, err)
}
_, err = s.Control(svc.Interrogate)
if err != nil {
t.Fatalf("Control(%s) failed: %s", s.Name, err)
}
time.Sleep(1 * time.Second)
_, err = s.Control(svc.Stop)
if err != nil {
t.Fatalf("Control(%s) failed: %s", s.Name, err)
}
waitState(t, s, svc.Stopped)
err = s.Delete()
if err != nil {
t.Fatalf("Delete failed: %s", err)
}
out, err := exec.Command("wevtutil.exe", "qe", "Application", "/q:*[System[Provider[@Name='myservice']]]", "/rd:true", "/c:10").CombinedOutput()
if err != nil {
t.Fatalf("wevtutil failed: %v\n%v", err, string(out))
}
want := strings.Join(append([]string{name}, args...), "-")
// Test context passing (see servicemain in sys_386.s and sys_amd64.s).
want += "-123456"
if !strings.Contains(string(out), want) {
t.Errorf("%q string does not contain %q", string(out), want)
}
}
func TestIsAnInteractiveSession(t *testing.T) {
isInteractive, err := svc.IsAnInteractiveSession()
if err != nil {
t.Fatal(err)
}
if !isInteractive {
t.Error("IsAnInteractiveSession retuns false when running interactively.")
}
}
func TestIsWindowsService(t *testing.T) {
isSvc, err := svc.IsWindowsService()
if err != nil {
t.Fatal(err)
}
if isSvc {
t.Error("IsWindowsService retuns true when not running in a service.")
}
}
func TestIsWindowsServiceWhenParentExits(t *testing.T) {
if os.Getenv("GO_WANT_HELPER_PROCESS") == "parent" {
// in parent process
// Start the child and exit quickly.
child := exec.Command(os.Args[0], "-test.run=TestIsWindowsServiceWhenParentExits")
child.Env = append(os.Environ(), "GO_WANT_HELPER_PROCESS=child")
err := child.Start()
if err != nil {
fmt.Fprintf(os.Stderr, fmt.Sprintf("child start failed: %v", err))
os.Exit(1)
}
os.Exit(0)
}
if os.Getenv("GO_WANT_HELPER_PROCESS") == "child" {
// in child process
dumpPath := os.Getenv("GO_WANT_HELPER_PROCESS_FILE")
if dumpPath == "" {
// We cannot report this error. But main test will notice
// that we did not create dump file.
os.Exit(1)
}
var msg string
isSvc, err := svc.IsWindowsService()
if err != nil {
msg = err.Error()
}
if isSvc {
msg = "IsWindowsService retuns true when not running in a service."
}
err = ioutil.WriteFile(dumpPath, []byte(msg), 0644)
if err != nil {
// We cannot report this error. But main test will notice
// that we did not create dump file.
os.Exit(2)
}
os.Exit(0)
}
// Run in a loop until it fails.
for i := 0; i < 10; i++ {
childDumpPath := filepath.Join(t.TempDir(), "issvc.txt")
parent := exec.Command(os.Args[0], "-test.run=TestIsWindowsServiceWhenParentExits")
parent.Env = append(os.Environ(),
"GO_WANT_HELPER_PROCESS=parent",
"GO_WANT_HELPER_PROCESS_FILE="+childDumpPath)
parentOutput, err := parent.CombinedOutput()
if err != nil {
t.Errorf("parent failed: %v: %v", err, string(parentOutput))
}
for i := 0; ; i++ {
if _, err := os.Stat(childDumpPath); err == nil {
break
}
time.Sleep(100 * time.Millisecond)
if i > 10 {
t.Fatal("timed out waiting for child ouput file to be created.")
}
}
childOutput, err := ioutil.ReadFile(childDumpPath)
if err != nil {
t.Fatalf("reading child ouput failed: %v", err)
}
if got, want := string(childOutput), ""; got != want {
t.Fatalf("child output: want %q, got %q", want, got)
}
}
}
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