[fix] apply Windows daemon settings immediately

Add a runtime watchdog with Unicode process launch and session-end handling. Report autostart save failures and document the updated Windows behavior.

Validated with a Windows Release build, daemon and autostart integration checks, GUI crash recovery, tray exit, real logoff/login, and full reboot/login.

apps/desktop/src/app/main.cpp

@@ -18,6 +18,7 @@
 
 #include "platform/windows/autostart_task.h"
 #include "platform/windows/gui/slint_backend.h"
+#include "platform/windows/runtime_daemon.h"
 #include "service_host.h"
 #include "service_lifetime.h"
 #include "shutdown_order.h"
@@ -395,6 +396,17 @@ static int RunApplication(
   const int result = render.Run();
   runtime_daemon.Shutdown(result != 0);
   return result;
+#elif defined(_WIN32)
+  auto& runtime_daemon = crossdesk::platform::WindowsRuntimeDaemon::Instance();
+  runtime_daemon.Initialize();
+  std::string daemon_error;
+  if (!runtime_daemon.SetEnabled(enable_daemon, daemon_error)) {
+    crossdesk::get_logger()->warn("Could not start daemon: {}", daemon_error);
+  }
+  crossdesk::Render render;
+  const int result = render.Run();
+  runtime_daemon.Shutdown(result != 0);
+  return result;
 #else
 
   if (enable_daemon) {
@@ -433,8 +445,12 @@ static int RunApplication(
 
 int main(int argc, char* argv[]) {
 #ifdef _WIN32
-  // Apply in every process, including the daemon and --child. Windows does
+  if (argc >= 2 &&
-  // not inherit shutdown priority from a parent process.
+      std::strcmp(argv[1], crossdesk::platform::kWindowsDaemonArgument) == 0) {
+    return crossdesk::platform::RunWindowsRuntimeDaemon();
+  }
+  // Apply in every GUI process, including legacy --child launches. The watcher
+  // keeps the default shutdown priority so it ends before this remote host.
   const DWORD shutdown_error = crossdesk::ConfigureWindowsShutdownOrder(
       crossdesk::WindowsShutdownRole::host);
   if (shutdown_error != ERROR_SUCCESS) {

apps/desktop/src/config_center/config_center.cpp

@@ -12,6 +12,10 @@
 #include "rd_log.h"
 #include <minirtc.h>
 
+#ifdef _WIN32
+#include "platform/windows/runtime_daemon.h"
+#endif
+
 #if defined(__linux__) && !defined(__OHOS__)
 #include "platform/linux/autostart.h"
 #include "platform/linux/runtime_daemon.h"
@@ -424,14 +428,19 @@ int ConfigCenter::SetAutostart(bool enabled) {
 }
 
 int ConfigCenter::SetDaemon(bool enabled) {
-#if defined(__linux__) && !defined(__OHOS__)
+#if defined(_WIN32) || (defined(__linux__) && !defined(__OHOS__))
   const bool previous = enable_daemon_;
 #endif
   if (StoreValues({{"enable_daemon", enabled ? "true" : "false"}}) != 0) return -1;
   enable_daemon_ = enabled;
-#if defined(__linux__) && !defined(__OHOS__)
+#if defined(_WIN32) || (defined(__linux__) && !defined(__OHOS__))
   std::string error;
-  if (!platform::LinuxRuntimeDaemon::Instance().SetEnabled(enabled, error)) {
+#ifdef _WIN32
+  auto& daemon = platform::WindowsRuntimeDaemon::Instance();
+#else
+  auto& daemon = platform::LinuxRuntimeDaemon::Instance();
+#endif
+  if (!daemon.SetEnabled(enabled, error)) {
     LOG_ERROR("Cannot apply daemon setting: {}", error);
     if (StoreValues({{"enable_daemon", previous ? "true" : "false"}}) == 0) {
       enable_daemon_ = previous;

apps/desktop/src/gui/application/gui_application.cpp

@@ -4983,7 +4983,13 @@ bool GuiApplication::SaveSettingsFromUi(bool gallery_window) {
   config_center_->SetForceRelay(main->get_force_relay_enabled());
   main->set_force_relay_enabled(config_center_->IsForceRelay());
 #if !defined(__OHOS__)
-  config_center_->SetAutostart(enable_autostart_);
+  if (config_center_->SetAutostart(enable_autostart_) != 0) {
+    enable_autostart_ = config_center_->IsEnableAutostart();
+    main->set_autostart_enabled(enable_autostart_);
+    main->set_settings_save_error(UiText(
+        localization::Literal("保存失败，请重试", localization_language_index_)));
+    return false;
+  }
 #endif
   if (config_center_->SetDaemon(enable_daemon_) != 0) {
     enable_daemon_ = config_center_->IsEnableDaemon();

apps/desktop/src/platform/windows/daemon_backend.cpp

@@ -4,6 +4,7 @@
 
 #include <atomic>
 #include <chrono>
+#include <filesystem>
 #include <thread>
 #include <vector>
 
@@ -23,21 +24,21 @@ bool DaemonStopRequested() { return g_stop_requested.load(); }
 bool PrepareDaemon() { return true; }
 
 std::string GetDaemonExecutablePath() {
-  char path[32768] = {};
+  wchar_t path[32768] = {};
-  const DWORD length = GetModuleFileNameA(nullptr, path, sizeof(path));
+  const DWORD length = GetModuleFileNameW(nullptr, path, 32768);
-  return length > 0 && length < sizeof(path) ? std::string(path, length)
+  return length > 0 && length < 32768
-                                             : std::string();
+             ? std::filesystem::path(path, path + length).u8string()
+             : std::string();
 }
 
 DaemonChildResult RunDaemonChild(const std::string& executable_path,
                                  const std::function<bool()>& keep_running) {
   DaemonChildResult result;
-  STARTUPINFOA startup = {sizeof(startup)};
+  STARTUPINFOW startup = {sizeof(startup)};
   PROCESS_INFORMATION process = {};
-  std::string command = "\"" + executable_path + "\" --child";
+  const auto path = std::filesystem::u8path(executable_path).wstring();
-  std::vector<char> command_buffer(command.begin(), command.end());
+  std::wstring command = L"\"" + path + L"\" --child";
-  command_buffer.push_back('\0');
+  if (!CreateProcessW(path.c_str(), command.data(), nullptr, nullptr, FALSE,
-  if (!CreateProcessA(nullptr, command_buffer.data(), nullptr, nullptr, FALSE,
                       0, nullptr, nullptr, &startup, &process)) {
     return result;
   }

apps/desktop/src/platform/windows/runtime_daemon.cpp

@@ -0,0 +1,290 @@
+#include "platform/windows/runtime_daemon.h"
+
+#include <shellapi.h>
+
+#include <cerrno>
+#include <cstdint>
+#include <cwchar>
+#include <limits>
+
+namespace crossdesk::platform {
+namespace {
+
+constexpr DWORD kStartupTimeoutMs = 3000;
+constexpr DWORD kRestartDelayMs = 1000;
+constexpr wchar_t kWindowClass[] = L"CrossDesk.RuntimeDaemon";
+
+struct Handle {
+  HANDLE value = nullptr;
+  ~Handle() { if (value) CloseHandle(value); }
+};
+
+struct Arguments {
+  int count = 0;
+  wchar_t** values = CommandLineToArgvW(GetCommandLineW(), &count);
+  ~Arguments() { if (values) LocalFree(values); }
+};
+
+std::wstring ExecutablePath() {
+  std::vector<wchar_t> path(32768);
+  const DWORD count = GetModuleFileNameW(nullptr, path.data(),
+                                        static_cast<DWORD>(path.size()));
+  if (!count || count >= path.size()) return {};
+  return {path.data(), count};
+}
+
+std::wstring QuoteArgument(const std::wstring& value) {
+  std::wstring result = L"\"";
+  size_t slashes = 0;
+  for (const wchar_t c : value) {
+    if (c == L'\\') {
+      ++slashes;
+    } else {
+      result.append(c == L'"' ? slashes * 2 + 1 : slashes, L'\\');
+      result += c;
+      slashes = 0;
+    }
+  }
+  result.append(slashes * 2, L'\\');
+  return result + L'"';
+}
+
+bool Failed(const char* operation, std::string& error,
+            DWORD code = GetLastError()) {
+  error = std::string(operation) + " failed (Windows error " +
+          std::to_string(code ? code : ERROR_GEN_FAILURE) + ")";
+  return false;
+}
+
+HANDLE ParseHandle(const wchar_t* text) {
+  wchar_t* end = nullptr;
+  errno = 0;
+  const auto value = std::wcstoull(text, &end, 10);
+  if (errno || !text[0] || *end || text[0] == L'-' || !value ||
+      value > (std::numeric_limits<uintptr_t>::max)()) return nullptr;
+  return reinterpret_cast<HANDLE>(static_cast<uintptr_t>(value));
+}
+
+struct SessionWindow {
+  HWND window = nullptr;
+  bool query_pending = false;
+  bool ending = false;
+
+  ~SessionWindow() { if (window) DestroyWindow(window); }
+
+  static LRESULT CALLBACK WindowProc(HWND window, UINT message,
+                                    WPARAM wparam, LPARAM lparam) {
+    if (message == WM_NCCREATE) {
+      const auto* create = reinterpret_cast<CREATESTRUCTW*>(lparam);
+      SetWindowLongPtrW(window, GWLP_USERDATA,
+                        reinterpret_cast<LONG_PTR>(create->lpCreateParams));
+    }
+    auto* state = reinterpret_cast<SessionWindow*>(
+        GetWindowLongPtrW(window, GWLP_USERDATA));
+    if (state && message == WM_QUERYENDSESSION) {
+      state->query_pending = true;
+      return TRUE;
+    }
+    if (state && message == WM_ENDSESSION) {
+      state->query_pending = false;
+      state->ending = wparam != FALSE;
+      return 0;
+    }
+    return DefWindowProcW(window, message, wparam, lparam);
+  }
+
+  bool Create(DWORD owner) {
+    WNDCLASSW klass{};
+    klass.lpfnWndProc = WindowProc;
+    klass.hInstance = GetModuleHandleW(nullptr);
+    klass.lpszClassName = kWindowClass;
+    if (!RegisterClassW(&klass) && GetLastError() != ERROR_CLASS_ALREADY_EXISTS)
+      return false;
+    const auto title = std::to_wstring(owner);
+    // Message-only windows do not receive session-end broadcasts.
+    window = CreateWindowExW(WS_EX_TOOLWINDOW, kWindowClass, title.c_str(),
+                             WS_OVERLAPPED, 0, 0, 0, 0, nullptr, nullptr,
+                             klass.hInstance, this);
+    return window != nullptr;
+  }
+
+  void Pump() {
+    MSG message{};
+    while (PeekMessageW(&message, nullptr, 0, 0, PM_REMOVE)) {
+      if (message.message == WM_QUIT) ending = true;
+      TranslateMessage(&message);
+      DispatchMessageW(&message);
+    }
+  }
+};
+
+}  // namespace
+
+WindowsRuntimeDaemon& WindowsRuntimeDaemon::Instance() {
+  static WindowsRuntimeDaemon daemon;
+  return daemon;
+}
+
+WindowsRuntimeDaemon::~WindowsRuntimeDaemon() { Shutdown(); }
+
+void WindowsRuntimeDaemon::Initialize() {
+  std::lock_guard<std::mutex> lock(mutex_);
+  initialized_ = true;
+  executable_ = ExecutablePath();
+  arguments_.clear();
+  Arguments arguments;
+  if (!arguments.values) {
+    executable_.clear();
+    return;
+  }
+  for (int i = 1; i < arguments.count; ++i)
+    arguments_.emplace_back(arguments.values[i]);
+}
+
+bool WindowsRuntimeDaemon::SetEnabled(bool enabled, std::string& error) {
+  std::lock_guard<std::mutex> lock(mutex_);
+  error.clear();
+  // Config-only callers and the unattended service do not own a GUI watcher.
+  if (!initialized_) return true;
+  if (!enabled) return Stop(error);
+  if (process_ && WaitForSingleObject(process_, 0) == WAIT_TIMEOUT) return true;
+  if (!Stop(error)) return false;
+  if (executable_.empty())
+    return Failed("Resolve daemon executable", error, ERROR_FILE_NOT_FOUND);
+
+  SECURITY_ATTRIBUTES security{sizeof(security), nullptr, TRUE};
+  Handle owner;
+  if (!DuplicateHandle(GetCurrentProcess(), GetCurrentProcess(),
+                       GetCurrentProcess(), &owner.value,
+                       SYNCHRONIZE | PROCESS_QUERY_LIMITED_INFORMATION, TRUE, 0))
+    return Failed("Duplicate daemon owner", error);
+  Handle stop{CreateEventW(&security, TRUE, FALSE, nullptr)};
+  Handle ready{CreateEventW(&security, TRUE, FALSE, nullptr)};
+  if (!stop.value || !ready.value) return Failed("Create daemon events", error);
+
+  SIZE_T bytes = 0;
+  InitializeProcThreadAttributeList(nullptr, 1, 0, &bytes);
+  std::vector<unsigned char> attributes(bytes);
+  STARTUPINFOEXW startup{};
+  startup.StartupInfo.cb = sizeof(startup);
+  startup.lpAttributeList =
+      reinterpret_cast<LPPROC_THREAD_ATTRIBUTE_LIST>(attributes.data());
+  if (!InitializeProcThreadAttributeList(startup.lpAttributeList, 1, 0, &bytes))
+    return Failed("Initialize daemon handle list", error);
+  // Inherit only these private handles, never GUI locks, sockets or files.
+  HANDLE inherited[] = {owner.value, stop.value, ready.value};
+  bool started = UpdateProcThreadAttribute(
+      startup.lpAttributeList, 0, PROC_THREAD_ATTRIBUTE_HANDLE_LIST,
+      inherited, sizeof(inherited), nullptr, nullptr) != FALSE;
+  PROCESS_INFORMATION child{};
+  if (started) {
+    std::wstring command = QuoteArgument(executable_) + L" --windows-daemon";
+    for (HANDLE handle : inherited)
+      command += L" " + std::to_wstring(reinterpret_cast<uintptr_t>(handle));
+    for (const auto& argument : arguments_)
+      command += L" " + QuoteArgument(argument);
+    started = CreateProcessW(executable_.c_str(), command.data(), nullptr,
+        nullptr, TRUE, EXTENDED_STARTUPINFO_PRESENT | CREATE_NO_WINDOW,
+        nullptr, nullptr, &startup.StartupInfo, &child) != FALSE;
+  }
+  const DWORD code = GetLastError();
+  DeleteProcThreadAttributeList(startup.lpAttributeList);
+  if (!started) return Failed("Start daemon", error, code);
+  CloseHandle(child.hThread);
+  process_ = child.hProcess;
+  stop_ = stop.value;
+  stop.value = nullptr;
+  HANDLE startup_events[] = {process_, ready.value};
+  if (WaitForMultipleObjects(2, startup_events, FALSE, kStartupTimeoutMs) !=
+      WAIT_OBJECT_0 + 1) {
+    std::string cleanup;
+    Stop(cleanup);
+    return Failed("Wait for daemon readiness", error, ERROR_PROCESS_ABORTED);
+  }
+  return true;
+}
+
+bool WindowsRuntimeDaemon::Stop(std::string& error) {
+  if (!process_) return true;
+  SetEvent(stop_);
+  if (WaitForSingleObject(process_, kStartupTimeoutMs) != WAIT_OBJECT_0) {
+    // The handle still identifies our helper even if its PID has been reused.
+    if (!TerminateProcess(process_, ERROR_PROCESS_ABORTED) ||
+        WaitForSingleObject(process_, kStartupTimeoutMs) != WAIT_OBJECT_0)
+      return Failed("Stop daemon", error);
+  }
+  CloseHandle(process_);
+  CloseHandle(stop_);
+  process_ = stop_ = nullptr;
+  return true;
+}
+
+void WindowsRuntimeDaemon::Shutdown(bool restart) {
+  std::lock_guard<std::mutex> lock(mutex_);
+  if (!restart) {
+    std::string error;
+    Stop(error);
+  } else {
+    // Leave the helper armed until this process exits and releases its leases.
+    if (process_) CloseHandle(process_);
+    if (stop_) CloseHandle(stop_);
+    process_ = stop_ = nullptr;
+  }
+}
+
+int RunWindowsRuntimeDaemon() {
+  Arguments arguments;
+  if (!arguments.values || arguments.count < 5 ||
+      std::wcscmp(arguments.values[1], L"--windows-daemon") != 0) return 1;
+  Handle owner{ParseHandle(arguments.values[2])};
+  Handle stop{ParseHandle(arguments.values[3])};
+  Handle ready{ParseHandle(arguments.values[4])};
+  const DWORD owner_id = GetProcessId(owner.value);
+  if (!owner_id || owner_id == GetCurrentProcessId() || !stop.value ||
+      !ready.value) return 1;
+  for (HANDLE handle : {owner.value, stop.value, ready.value}) {
+    DWORD flags = 0;
+    if (!GetHandleInformation(handle, &flags) || !(flags & HANDLE_FLAG_INHERIT) ||
+        !SetHandleInformation(handle, HANDLE_FLAG_INHERIT, 0)) return 1;
+  }
+  SessionWindow session;
+  if (!session.Create(owner_id) || !SetEvent(ready.value)) return 1;
+
+  bool exited = false;
+  ULONGLONG restart_at = 0;
+  HANDLE watched[] = {stop.value, owner.value};
+  for (;;) {
+    session.Pump();
+    if (session.ending || WaitForSingleObject(stop.value, 0) == WAIT_OBJECT_0)
+      return 0;
+    const auto now = GetTickCount64();
+    if (exited && now >= restart_at && !session.query_pending &&
+        !GetSystemMetrics(SM_SHUTTINGDOWN)) break;
+    const DWORD timeout = exited && now < restart_at
+        ? static_cast<DWORD>(restart_at - now) : INFINITE;
+    const DWORD count = exited ? 1 : 2;
+    const DWORD result = MsgWaitForMultipleObjectsEx(
+        count, watched, timeout, QS_ALLINPUT, MWMO_INPUTAVAILABLE);
+    if (result == WAIT_OBJECT_0) return 0;
+    if (!exited && result == WAIT_OBJECT_0 + 1) {
+      exited = true;
+      restart_at = GetTickCount64() + kRestartDelayMs;
+    } else if (result != WAIT_OBJECT_0 + count && result != WAIT_TIMEOUT) {
+      return 1;
+    }
+  }
+  const auto executable = ExecutablePath();
+  if (executable.empty()) return 1;
+  std::wstring command = QuoteArgument(executable);
+  for (int i = 5; i < arguments.count; ++i)
+    command += L" " + QuoteArgument(arguments.values[i]);
+  STARTUPINFOW startup{sizeof(startup)};
+  PROCESS_INFORMATION child{};
+  if (!CreateProcessW(executable.c_str(), command.data(), nullptr, nullptr,
+                      FALSE, 0, nullptr, nullptr, &startup, &child)) return 1;
+  CloseHandle(child.hThread);
+  CloseHandle(child.hProcess);
+  return 0;
+}
+
+}  // namespace crossdesk::platform

apps/desktop/src/platform/windows/runtime_daemon.h

@@ -0,0 +1,42 @@
+#ifndef CROSSDESK_PLATFORM_WINDOWS_RUNTIME_DAEMON_H_
+#define CROSSDESK_PLATFORM_WINDOWS_RUNTIME_DAEMON_H_
+
+#include <windows.h>
+
+#include <mutex>
+#include <string>
+#include <vector>
+
+namespace crossdesk::platform {
+
+inline constexpr char kWindowsDaemonArgument[] = "--windows-daemon";
+
+// Watches the GUI from a separate process, so settings can start/stop crash
+// recovery without replacing the GUI or interrupting its sessions.
+class WindowsRuntimeDaemon {
+ public:
+  static WindowsRuntimeDaemon& Instance();
+  ~WindowsRuntimeDaemon();
+
+  void Initialize();
+  bool SetEnabled(bool enabled, std::string& error);
+  void Shutdown(bool restart = false);
+
+ private:
+  WindowsRuntimeDaemon() = default;
+  bool Stop(std::string& error);
+  std::mutex mutex_;
+  bool initialized_ = false;
+  std::wstring executable_;
+  std::vector<std::wstring> arguments_;
+  HANDLE process_ = nullptr;
+  HANDLE stop_ = nullptr;
+};
+
+// Dispatch before logging, configuration, service startup and instance locks.
+// Reads the Unicode command line itself, including the original GUI arguments.
+int RunWindowsRuntimeDaemon();
+
+}  // namespace crossdesk::platform
+
+#endif

apps/desktop/xmake/targets.lua

@@ -504,6 +504,12 @@ function setup_targets()
                 add_defines("CROSSDESK_PORTABLE=1")
             end
             add_files("apps/desktop/tests/windows_autostart_test.cpp")
+
+        target("windows_runtime_daemon")
+            set_kind("static")
+            add_includedirs("apps/desktop/src", {public = true})
+            add_files("apps/desktop/src/platform/windows/runtime_daemon.cpp")
+            add_syslinks("User32", "Shell32", {public = true})
     end
 
     target("config_center")
@@ -511,6 +517,8 @@ function setup_targets()
         add_deps("rd_log", "autostart")
         if is_os("linux") then
             add_deps("linux_runtime_daemon")
+        elseif is_os("windows") then
+            add_deps("windows_runtime_daemon")
         end
         add_files("apps/desktop/src/config_center/*.cpp")
         add_includedirs("apps/desktop/src", "apps/desktop/src/config_center",

docs/USER_GUIDE.md

@@ -158,7 +158,7 @@ sudo apt install "./crossdesk-virtual-desktop-xfce-linux-amd64-<version>.deb"
 | 被连接时开启隐私屏 | 设置本机被远程连接时是否自动启用隐私屏；会话中可从控制端工具栏切换 |
 | 自托管配置 | 点击“编辑”填写服务器地址和信令服务端口，使用右侧开关启用 |
 | 开机自启 | 保存后设置登录桌面时自动启动 |
-| 启用守护进程 | Linux 桌面模式保存后立即启用或停用异常退出后的自动重启，无需重启程序；正常退出不会重新拉起。Windows / macOS 下次启动生效，无头控制台模式不启用内置守护 |
+| 启用守护进程 | Windows / Linux 桌面模式保存后立即启用或停用异常退出后的自动重启，无需重启程序；正常退出或注销不会重新拉起。macOS 下次启动生效，无头控制台模式不启用内置守护 |
 | 文件保存路径 | 选择接收文件的目录 |
 
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