| 1 | //go:build windows |
| 2 | |
| 3 | package desktopinstance |
| 4 | |
| 5 | import ( |
| 6 | "bytes" |
| 7 | "errors" |
| 8 | "fmt" |
| 9 | "os" |
| 10 | "path/filepath" |
| 11 | "runtime" |
| 12 | "strings" |
| 13 | "syscall" |
| 14 | "time" |
| 15 | "unsafe" |
| 16 | |
| 17 | "golang.org/x/sys/windows" |
| 18 | ) |
| 19 | |
| 20 | var user32 = windows.NewLazySystemDLL("user32.dll") |
| 21 | |
| 22 | type process struct { |
| 23 | pid uint32 |
| 24 | parent uint32 |
| 25 | handle windows.Handle |
| 26 | image string |
| 27 | created windows.Filetime |
| 28 | status *Status |
| 29 | legacyProfile string |
| 30 | } |
| 31 | |
| 32 | func canonical(path string) (string, error) { |
| 33 | absolute, err := filepath.Abs(path) |
| 34 | if err != nil { |
| 35 | return "", err |
| 36 | } |
| 37 | resolved, err := filepath.EvalSymlinks(absolute) |
| 38 | if err != nil { |
| 39 | return "", err |
| 40 | } |
| 41 | return filepath.Clean(resolved), nil |
| 42 | } |
| 43 | |
| 44 | func sameUser(handle windows.Handle) (bool, error) { |
| 45 | var token windows.Token |
| 46 | if err := windows.OpenProcessToken(handle, windows.TOKEN_QUERY, &token); err != nil { |
| 47 | return false, err |
| 48 | } |
| 49 | defer token.Close() |
| 50 | theirs, err := token.GetTokenUser() |
| 51 | if err != nil { |
| 52 | return false, err |
| 53 | } |
| 54 | ours, err := windows.GetCurrentProcessToken().GetTokenUser() |
| 55 | if err != nil { |
| 56 | return false, err |
| 57 | } |
| 58 | return theirs.User.Sid.Equals(ours.User.Sid), nil |
| 59 | } |
| 60 | |
| 61 | func openProcess(pid, parent uint32) (*process, error) { |
| 62 | h, err := windows.OpenProcess(windows.PROCESS_QUERY_LIMITED_INFORMATION|windows.SYNCHRONIZE, false, pid) |
| 63 | if err != nil { |
| 64 | return nil, err |
| 65 | } |
| 66 | p := &process{pid: pid, parent: parent, handle: h} |
| 67 | ok := false |
| 68 | defer func() { |
| 69 | if !ok { |
| 70 | windows.CloseHandle(h) |
| 71 | } |
| 72 | }() |
| 73 | own, err := sameUser(h) |
| 74 | if err != nil { |
| 75 | return nil, fmt.Errorf("cannot verify process user: %w", err) |
| 76 | } |
| 77 | if !own { |
| 78 | return nil, errors.New("cannot verify process user") |
| 79 | } |
| 80 | buffer := make([]uint16, 32768) |
| 81 | size := uint32(len(buffer)) |
| 82 | if err := windows.QueryFullProcessImageName(h, 0, &buffer[0], &size); err != nil { |
| 83 | return nil, err |
| 84 | } |
| 85 | p.image, err = canonical(windows.UTF16ToString(buffer[:size])) |
| 86 | if err != nil { |
| 87 | return nil, err |
| 88 | } |
| 89 | var exited, kernel, user windows.Filetime |
| 90 | if err := windows.GetProcessTimes(h, &p.created, &exited, &kernel, &user); err != nil { |
| 91 | return nil, err |
| 92 | } |
| 93 | if !p.alive() { |
| 94 | return nil, errors.New("process exited during inspection") |
| 95 | } |
| 96 | ok = true |
| 97 | return p, nil |
| 98 | } |
| 99 | |
| 100 | func (p *process) alive() bool { |
| 101 | result, err := windows.WaitForSingleObject(p.handle, 0) |
| 102 | return err == nil && result == uint32(windows.WAIT_TIMEOUT) |
| 103 | } |
| 104 | func (p *process) close() { windows.CloseHandle(p.handle) } |
| 105 | |
| 106 | func ordinaryProduct(image string) bool { |
| 107 | size, err := windows.GetFileVersionInfoSize(image, nil) |
| 108 | if err != nil || size == 0 || size > 1024*1024 { |
| 109 | return false |
| 110 | } |
| 111 | data := make([]byte, size) |
| 112 | if windows.GetFileVersionInfo(image, 0, size, unsafe.Pointer(&data[0])) != nil { |
| 113 | return false |
| 114 | } |
| 115 | var translations *uint16 |
| 116 | var count uint32 |
| 117 | if windows.VerQueryValue(unsafe.Pointer(&data[0]), `\VarFileInfo\Translation`, unsafe.Pointer(&translations), &count) != nil || count < 4 { |
| 118 | return false |
| 119 | } |
| 120 | values := unsafe.Slice(translations, int(count/2)) |
| 121 | for i := 0; i+1 < len(values); i += 2 { |
| 122 | var value *uint16 |
| 123 | var length uint32 |
| 124 | key := fmt.Sprintf(`\StringFileInfo\%04x%04x\ProductName`, values[i], values[i+1]) |
| 125 | if windows.VerQueryValue(unsafe.Pointer(&data[0]), key, unsafe.Pointer(&value), &length) == nil && value != nil && length > 0 { |
| 126 | name := windows.UTF16ToString(unsafe.Slice(value, int(length))) |
| 127 | runtime.KeepAlive(data) |
| 128 | return name == "Reasonix" |
| 129 | } |
| 130 | } |
| 131 | return false |
| 132 | } |
| 133 | |
| 134 | func (p *process) terminate() error { |
| 135 | if !p.alive() { |
| 136 | return nil |
| 137 | } |
| 138 | h, err := windows.OpenProcess(windows.PROCESS_TERMINATE|windows.PROCESS_QUERY_LIMITED_INFORMATION|windows.SYNCHRONIZE, false, p.pid) |
| 139 | if err != nil { |
| 140 | return err |
| 141 | } |
| 142 | defer windows.CloseHandle(h) |
| 143 | var created, exited, kernel, user windows.Filetime |
| 144 | if err := windows.GetProcessTimes(h, &created, &exited, &kernel, &user); err != nil { |
| 145 | return err |
| 146 | } |
| 147 | if created != p.created || !p.alive() { |
| 148 | return outcome(UnknownOwner, "process identity changed") |
| 149 | } |
| 150 | return windows.TerminateProcess(h, 1) |
| 151 | } |
| 152 | |
| 153 | func readStatus(p *process) (Status, error) { |
| 154 | var zero Status |
| 155 | name, _ := windows.UTF16PtrFromString(fmt.Sprintf(`\\.\pipe\reasonix-shell-v1-%d`, p.pid)) |
| 156 | pipe, err := windows.CreateFile(name, windows.GENERIC_READ, 0, nil, windows.OPEN_EXISTING, windows.FILE_FLAG_OVERLAPPED, 0) |
| 157 | connectDeadline := time.Now().Add(2 * time.Second) |
| 158 | for errors.Is(err, windows.ERROR_PIPE_BUSY) && time.Now().Before(connectDeadline) { |
| 159 | time.Sleep(20 * time.Millisecond) |
| 160 | pipe, err = windows.CreateFile(name, windows.GENERIC_READ, 0, nil, windows.OPEN_EXISTING, windows.FILE_FLAG_OVERLAPPED, 0) |
| 161 | } |
| 162 | if err != nil { |
| 163 | return zero, err |
| 164 | } |
| 165 | defer windows.CloseHandle(pipe) |
| 166 | var owner uint32 |
| 167 | if err := windows.GetNamedPipeServerProcessId(pipe, &owner); err != nil { |
| 168 | return zero, err |
| 169 | } |
| 170 | if owner != p.pid || !p.alive() { |
| 171 | return zero, outcome(UnknownOwner, "status pipe owner changed") |
| 172 | } |
| 173 | event, err := windows.CreateEvent(nil, 1, 0, nil) |
| 174 | if err != nil { |
| 175 | return zero, err |
| 176 | } |
| 177 | defer windows.CloseHandle(event) |
| 178 | data := make([]byte, 0, StatusLimit+1) |
| 179 | deadline := time.Now().Add(2 * time.Second) |
| 180 | for len(data) <= StatusLimit { |
| 181 | buffer := make([]byte, StatusLimit+1-len(data)) |
| 182 | var n uint32 |
| 183 | if err := windows.ResetEvent(event); err != nil { |
| 184 | return zero, err |
| 185 | } |
| 186 | ov := windows.Overlapped{HEvent: event} |
| 187 | err = windows.ReadFile(pipe, buffer, &n, &ov) |
| 188 | if errors.Is(err, windows.ERROR_IO_PENDING) { |
| 189 | remaining := max(time.Until(deadline), 0) |
| 190 | wait, waitErr := windows.WaitForSingleObject(event, uint32(remaining.Milliseconds())) |
| 191 | if waitErr != nil || wait != windows.WAIT_OBJECT_0 { |
| 192 | _ = windows.CancelIoEx(pipe, &ov) |
| 193 | _, _ = windows.WaitForSingleObject(event, windows.INFINITE) |
| 194 | return zero, errors.New("shell status read timeout") |
| 195 | } |
| 196 | err = windows.GetOverlappedResult(pipe, &ov, &n, false) |
| 197 | } |
| 198 | if n > 0 { |
| 199 | data = append(data, buffer[:n]...) |
| 200 | } |
| 201 | if bytes.Contains(data, []byte{'\n'}) { |
| 202 | break |
| 203 | } |
| 204 | if err != nil { |
| 205 | return zero, err |
| 206 | } |
| 207 | if n == 0 { |
| 208 | return zero, errors.New("empty shell status") |
| 209 | } |
| 210 | } |
| 211 | if !p.alive() { |
| 212 | return zero, errors.New("shell exited during status read") |
| 213 | } |
| 214 | return DecodeStatus(bytes.TrimSpace(data), p.pid) |
| 215 | } |
| 216 | |
| 217 | func processList() ([]windows.ProcessEntry32, error) { |
| 218 | h, err := windows.CreateToolhelp32Snapshot(windows.TH32CS_SNAPPROCESS, 0) |
| 219 | if err != nil { |
| 220 | return nil, err |
| 221 | } |
| 222 | defer windows.CloseHandle(h) |
| 223 | var entries []windows.ProcessEntry32 |
| 224 | var e windows.ProcessEntry32 |
| 225 | e.Size = uint32(unsafe.Sizeof(e)) |
| 226 | for err = windows.Process32First(h, &e); err == nil; err = windows.Process32Next(h, &e) { |
| 227 | entries = append(entries, e) |
| 228 | } |
| 229 | if !errors.Is(err, windows.ERROR_NO_MORE_FILES) { |
| 230 | return nil, err |
| 231 | } |
| 232 | return entries, nil |
| 233 | } |
| 234 | |
| 235 | func messageProfile(pid uint32) string { |
| 236 | class, _ := windows.UTF16PtrFromString("Chrome_MessageWindow") |
| 237 | find := user32.NewProc("FindWindowExW") |
| 238 | var after uintptr |
| 239 | for { |
| 240 | hwnd, _, _ := find.Call(^uintptr(2), after, uintptr(unsafe.Pointer(class)), 0) |
| 241 | if hwnd == 0 { |
| 242 | return "" |
| 243 | } |
| 244 | after = hwnd |
| 245 | var owner uint32 |
| 246 | user32.NewProc("GetWindowThreadProcessId").Call(hwnd, uintptr(unsafe.Pointer(&owner))) |
| 247 | if owner != pid { |
| 248 | continue |
| 249 | } |
| 250 | text := make([]uint16, 32768) |
| 251 | n, _, _ := user32.NewProc("GetWindowTextW").Call(hwnd, uintptr(unsafe.Pointer(&text[0])), uintptr(len(text))) |
| 252 | if n > 0 { |
| 253 | return windows.UTF16ToString(text[:n]) |
| 254 | } |
| 255 | } |
| 256 | } |
| 257 | |
| 258 | func closeWindows(p *process) { |
| 259 | callback := syscall.NewCallback(func(hwnd uintptr, _ uintptr) uintptr { |
| 260 | var owner uint32 |
| 261 | user32.NewProc("GetWindowThreadProcessId").Call(hwnd, uintptr(unsafe.Pointer(&owner))) |
| 262 | if owner == p.pid && p.alive() { |
| 263 | user32.NewProc("PostMessageW").Call(hwnd, 0x0010, 0, 0) |
| 264 | } |
| 265 | return 1 |
| 266 | }) |
| 267 | user32.NewProc("EnumWindows").Call(callback, 0) |
| 268 | } |
| 269 | |
| 270 | func focusLegacyWindow(p *process) bool { |
| 271 | shown := false |
| 272 | callback := syscall.NewCallback(func(hwnd uintptr, _ uintptr) uintptr { |
| 273 | var owner uint32 |
| 274 | user32.NewProc("GetWindowThreadProcessId").Call(hwnd, uintptr(unsafe.Pointer(&owner))) |
| 275 | if owner != p.pid || !p.alive() { |
| 276 | return 1 |
| 277 | } |
| 278 | n, _, _ := user32.NewProc("GetWindowTextLengthW").Call(hwnd) |
| 279 | if n == 0 { |
| 280 | return 1 |
| 281 | } |
| 282 | user32.NewProc("ShowWindow").Call(hwnd, 9) // SW_RESTORE also unhides tray windows. |
| 283 | user32.NewProc("SetForegroundWindow").Call(hwnd) |
| 284 | shown = true |
| 285 | return 0 |
| 286 | }) |
| 287 | user32.NewProc("EnumWindows").Call(callback, 0) |
| 288 | return shown |
| 289 | } |
| 290 | |
| 291 | func lockInstall(root string) (func(), error) { |
| 292 | token, err := windows.GetCurrentProcessToken().GetTokenUser() |
| 293 | if err != nil { |
| 294 | return nil, err |
| 295 | } |
| 296 | key := ProfileKey(root + "|" + token.User.Sid.String()) |
| 297 | name, _ := windows.UTF16PtrFromString(`Local\Reasonix-Recovery-` + key) |
| 298 | h, err := windows.CreateMutex(nil, false, name) |
| 299 | if err != nil && !errors.Is(err, windows.ERROR_ALREADY_EXISTS) { |
| 300 | return nil, err |
| 301 | } |
| 302 | runtime.LockOSThread() |
| 303 | result, err := windows.WaitForSingleObject(h, 120000) |
| 304 | if err != nil || (result != windows.WAIT_OBJECT_0 && result != windows.WAIT_ABANDONED) { |
| 305 | windows.CloseHandle(h) |
| 306 | runtime.UnlockOSThread() |
| 307 | return nil, outcome(ExitTimeout, "another install or recovery is still running") |
| 308 | } |
| 309 | return func() { _ = windows.ReleaseMutex(h); windows.CloseHandle(h); runtime.UnlockOSThread() }, nil |
| 310 | } |
| 311 | |
| 312 | func Notify(err error) { |
| 313 | titleText, bodyText := notificationContent(err) |
| 314 | title, _ := windows.UTF16PtrFromString(titleText) |
| 315 | text, _ := windows.UTF16PtrFromString(bodyText) |
| 316 | user32.NewProc("MessageBoxW").Call(0, uintptr(unsafe.Pointer(text)), uintptr(unsafe.Pointer(title)), 0x30) |
| 317 | } |
| 318 | |
| 319 | func notificationContent(err error) (string, string) { |
| 320 | var failure *Error |
| 321 | if errors.As(err, &failure) && failure.Code == UnsupportedPortableLocation { |
| 322 | return "Reasonix 无法从当前位置启动", unsupportedPortableLocationMessage |
| 323 | } |
| 324 | return "Reasonix 启动 / Startup", "Reasonix 未能完成启动或更新，请查看日志后重试。\nReasonix could not finish startup or update.\n\n" + err.Error() |
| 325 | } |
| 326 | |
| 327 | func confirmProcesses(list []*process) bool { |
| 328 | var text strings.Builder |
| 329 | text.WriteString("旧版 Reasonix 尚未退出。结束进程可能丢失未保存内容。\n\nEnd these old Reasonix processes and continue? Unsaved work may be lost.\n") |
| 330 | for _, p := range list { |
| 331 | fmt.Fprintf(&text, "\nPID %d: %s", p.pid, p.image) |
| 332 | } |
| 333 | title, _ := windows.UTF16PtrFromString("Reasonix 恢复 / Recovery") |
| 334 | body, _ := windows.UTF16PtrFromString(text.String()) |
| 335 | // Label the standard dialog's buttons explicitly; the negative action is |
| 336 | // still IDNO and remains the default even on non-Chinese Windows systems. |
| 337 | runtime.LockOSThread() |
| 338 | defer runtime.UnlockOSThread() |
| 339 | continueText, _ := windows.UTF16PtrFromString("结束旧进程并继续") |
| 340 | cancelText, _ := windows.UTF16PtrFromString("取消") |
| 341 | callback := syscall.NewCallback(func(code int32, hwnd, param uintptr) uintptr { |
| 342 | if code == 5 { // HCBT_ACTIVATE |
| 343 | user32.NewProc("SetDlgItemTextW").Call(hwnd, 6, uintptr(unsafe.Pointer(continueText))) |
| 344 | user32.NewProc("SetDlgItemTextW").Call(hwnd, 7, uintptr(unsafe.Pointer(cancelText))) |
| 345 | } |
| 346 | next, _, _ := user32.NewProc("CallNextHookEx").Call(0, uintptr(code), hwnd, param) |
| 347 | return next |
| 348 | }) |
| 349 | hook, _, _ := user32.NewProc("SetWindowsHookExW").Call(5, callback, 0, uintptr(windows.GetCurrentThreadId())) |
| 350 | if hook == 0 { |
| 351 | return false |
| 352 | } |
| 353 | defer user32.NewProc("UnhookWindowsHookEx").Call(hook) |
| 354 | result, _, _ := user32.NewProc("MessageBoxW").Call(0, uintptr(unsafe.Pointer(body)), uintptr(unsafe.Pointer(title)), 0x4|0x30|0x100) |
| 355 | return result == 6 |
| 356 | } |
| 357 | |
| 358 | func inspect(root, profile string, all bool) ([]*process, error) { |
| 359 | entries, err := processList() |
| 360 | if err != nil { |
| 361 | return nil, err |
| 362 | } |
| 363 | var found []*process |
| 364 | fail := func(err error) ([]*process, error) { |
| 365 | for _, p := range found { |
| 366 | p.close() |
| 367 | } |
| 368 | return nil, err |
| 369 | } |
| 370 | for _, e := range entries { |
| 371 | name := strings.ToLower(windows.UTF16ToString(e.ExeFile[:])) |
| 372 | if name != "reasonix.exe" && name != "reasonix-desktop.exe" { |
| 373 | continue |
| 374 | } |
| 375 | p, err := openProcess(e.ProcessID, e.ParentProcessID) |
| 376 | if err != nil { |
| 377 | if errors.Is(err, windows.ERROR_ACCESS_DENIED) { |
| 378 | if denied := deniedCandidate(e.ProcessID, processList); denied != nil { |
| 379 | return fail(denied) |
| 380 | } |
| 381 | } |
| 382 | continue |
| 383 | } |
| 384 | role := ImageRole(root, p.image) |
| 385 | if role != "" && !ordinaryProduct(p.image) { |
| 386 | p.close() |
| 387 | return fail(outcome(UnknownOwner, "product identity could not be verified for PID %d", e.ProcessID)) |
| 388 | } |
| 389 | if name == "reasonix.exe" { |
| 390 | status, statusErr := readStatus(p) |
| 391 | if statusErr == nil { |
| 392 | p.status = &status |
| 393 | if status.HomeKey == ProfileKey(profile) && role == "" { |
| 394 | p.close() |
| 395 | return fail(outcome(OtherInstallation, "another Reasonix installation owns this data home")) |
| 396 | } |
| 397 | } else { |
| 398 | if role != "" && !errors.Is(statusErr, windows.ERROR_FILE_NOT_FOUND) { |
| 399 | p.close() |
| 400 | return fail(outcome(UnknownOwner, "shell status could not be verified for PID %d: %v", e.ProcessID, statusErr)) |
| 401 | } |
| 402 | p.legacyProfile = messageProfile(p.pid) |
| 403 | if p.legacyProfile != "" { |
| 404 | if real, err := canonical(p.legacyProfile); err == nil && strings.EqualFold(real, profile) && role == "" { |
| 405 | p.close() |
| 406 | return fail(outcome(OtherInstallation, "another legacy Reasonix installation owns this data home")) |
| 407 | } |
| 408 | } |
| 409 | } |
| 410 | } |
| 411 | if role == "" { |
| 412 | p.close() |
| 413 | continue |
| 414 | } |
| 415 | if !all { |
| 416 | matches := p.status != nil && p.status.HomeKey == ProfileKey(profile) |
| 417 | if !matches && p.legacyProfile != "" { |
| 418 | if real, err := canonical(p.legacyProfile); err == nil { |
| 419 | matches = strings.EqualFold(real, profile) |
| 420 | } |
| 421 | } |
| 422 | if !matches { |
| 423 | p.close() |
| 424 | continue |
| 425 | } |
| 426 | } |
| 427 | found = append(found, p) |
| 428 | } |
| 429 | return found, nil |
| 430 | } |
| 431 | |
| 432 | // Windows can deny opening a terminating process from an older snapshot. |
| 433 | // Only its confirmed disappearance permits skipping it; live unknown owners |
| 434 | // and failed snapshot refreshes must still stop launch or recovery. |
| 435 | func deniedCandidate(pid uint32, snapshot func() ([]windows.ProcessEntry32, error)) error { |
| 436 | entries, err := snapshot() |
| 437 | if err != nil { |
| 438 | return outcome(UnknownOwner, "cannot refresh candidate PID %d after access denial: %v", pid, err) |
| 439 | } |
| 440 | for _, entry := range entries { |
| 441 | if entry.ProcessID == pid { |
| 442 | return outcome(UnknownOwner, "access denied while identifying candidate PID %d", pid) |
| 443 | } |
| 444 | } |
| 445 | return nil |
| 446 | } |
| 447 | |
| 448 | func preparePaths(root, home string) (string, string, error) { |
| 449 | root, err := canonical(root) |
| 450 | if err != nil { |
| 451 | return "", "", err |
| 452 | } |
| 453 | profile := filepath.Join(home, "desktop-shell") |
| 454 | if err := os.MkdirAll(profile, 0700); err != nil { |
| 455 | return "", "", err |
| 456 | } |
| 457 | profile, err = canonical(profile) |
| 458 | return root, profile, err |
| 459 | } |
| 460 |