如何确保Windows 2008 R2将SERVICE_CONTROL_PRESHUTDOWN控制通知传递给服务

Question

我正在使用普通的C ++和Windows API编写服务，并希望它接收可从Windows 2008 R2获得的PRESHUTDOWN通知。

http://msdn.microsoft.com/en-us/library/windows/desktop/ms685996(v=vs.85).aspx

我希望该服务处理关机前事件，并防止计算机在任意时间内完成关机。

我的ServiceMain循环，每5秒注销一条消息。

我将dwControls设置为：

SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_PRESHUTDOWN

我在ServiceControl回调中收到SERVICE_CONTROL_STOP通知就好了。

如果我运行我的服务，然后致电

sc query "MyService"

它说：

(STOPPABLE, NOT_PAUSABLE, ACCEPTS_PRESHUTDOWN)

我收到任何服务控制通知后立即写入日志文件的条目，然后我才会看到它是什么。

当我关机时，Windows会在屏幕上用大的白色字母说“停止MyService”，等待一下，然后完成关机。

然而：

主循环继续写入日志文件。 日志文件不包含任何服务控制尝试的引用。

然后，Windows放弃了关闭我的服务并终止了它。

现在，如果我做完全相同的事情，但是注册了SHUTDOWN而不是PRESHUTDOWN，我会在日志文件中看到我希望看到的所有通知（尽管不能延长关闭时间，因为我们不能这样做）从关机通知中）。

对代码的唯一更改是在设置状态调用中​​删除三个字母“PRE”。

我什至无法开始增加dwCheckPoint的程度-Windows子系统没有通知我。

Windows知道我正在寻找预关闭消息，正如“sc查询”所证明的那样，有什么东西可以阻止它接收预关闭消息吗？

相关方法：

报告状态时（很高兴SCM报告服务已启动）

VOID ServiceReportStatus (DWORD dwCurrentState, DWORD dwWin32ExitCode, DWORD dwWaitHint)
{
    // Fill in the SERVICE_STATUS structure.
    g_serviceStatus.dwCurrentState = dwCurrentState;
    g_serviceStatus.dwWin32ExitCode = dwWin32ExitCode;
    g_serviceStatus.dwWaitHint = dwWaitHint;

    switch(dwCurrentState)
    {
    case SERVICE_START_PENDING:
    case SERVICE_STOP_PENDING:
    case SERVICE_CONTINUE_PENDING:
    case SERVICE_PAUSE_PENDING:
        g_serviceStatus.dwControlsAccepted = 0;
        break;
    default:
        g_serviceStatus.dwControlsAccepted = SERVICE_ACCEPT_STOP | SERVICE_ACCEPT_PRESHUTDOWN;
    }

    // Report the status of the service to the SCM.
    SetServiceStatus (g_serviceStatusHandle, &g_serviceStatus);
}

当我收到消息时：

VOID WINAPI ServiceCtrlHandler (DWORD dwCtrl)
{
    LOG(eDeveloper10, L"ServiceCtrlHandler", L"Decoding SvcControl %d\n", dwCtrl);
   switch(dwCtrl) 
   {
      case SERVICE_CONTROL_PRESHUTDOWN:
          {
             LOG(eDeveloper10, L"ServiceCtrlHandler", L"Received SERVICE_CONTROL_PRESHUTDOWN\n");
             ServiceReportStatus(SERVICE_STOP_PENDING, NO_ERROR, 10000);

             // Signal the service to stop.
             SetEvent(g_serviceStopEvent);
             break;
          }
    }
}

它做的更多，但对于这个例子没什么用，因为我甚至没有看到日志（除非我注册SHUTDOWN）。

ServiceCtrlHandler总是快速返回，我在这里没有阻塞，我没有进入这里进行预关闭处理程序。 同时注册PRESHUTDOWN和SHUTDOWN也无济于事。 我已经在两台Windows 2008R2计算机，一台虚拟机，一台物理计算机上尝试了此方法，并且结果相同。 服务被编译为x64二进制文件。

有任何想法吗？

一些示例日志，这个日志是我请求收到SHUTDOWN的通知时：

L0  T2672 2781140 [CDbgEntry::LoadSystemDetails()] System Details Follow:

   Computer Name     : \\****
   Domain/Workgroup  : **** [Domain]
   User Name         : SYSTEM
   Operating System  : Windows NT Version 6.1 Build 7600
   Service Pack      : None.    
   Terminal Services : Terminal Services Present
   System Root       : C:\Windows\system32
   User's Windir     : C:\Windows


This file is recording debug messages with a maximum level of 10
L10 T2672 2781140 [ServiceInitialize] Service initialised, waiting for stop event
L10 T2672 2786140 [ServiceInitialize] Still waiting for stop event.
L10 T2668 2789328 [ServiceCtrlHandler] Decoding SvcControl 5
L10 T2668 2789328 [ServiceCtrlHandler] Received SERVICE_CONTROL_SHUTDOWN
L10 T2672 2789328 [ServiceInitialize] Stop event detected
L10 T2672 2789328 [ServiceInitialize] Blocking service shutdown
L10 T2672 2790328 [ServiceInitialize] Blocking service shutdown
L10 T2672 2791328 [ServiceInitialize] Blocking service shutdown
L10 T2672 2792328 [ServiceInitialize] Blocking service shutdown
L10 T2672 2793328 [ServiceInitialize] Blocking service shutdown
L10 T2672 2794328 [ServiceInitialize] Blocking service shutdown
L10 T2672 2795437 [ServiceInitialize] Blocking service shutdown
L10 T2672 2796437 [ServiceInitialize] Blocking service shutdown

请注意，在这种特殊情况下，阻止服务关闭是正确的行为。

如果我注册PRESHUTDOWN，我根本得不到ServiceCtrlHandler：

L0  T2244 516625 [CDbgEntry::LoadSystemDetails()] System Details Follow:

   Computer Name     : \\****
   Domain/Workgroup  : **** [Domain]
   User Name         : SYSTEM
   Operating System  : Windows NT Version 6.1 Build 7600
   Service Pack      : None.
   Terminal Services : Terminal Services Present
   System Root       : C:\Windows\system32
   User's Windir     : C:\Windows


This file is recording debug messages with a maximum level of 10
L10 T2244 516453 [ServiceInitialize] Service initialised, waiting for stop event
L10 T2244 521625 [ServiceInitialize] Still waiting for stop event.
L10 T2244 526625 [ServiceInitialize] Still waiting for stop event.
L10 T2244 531625 [ServiceInitialize] Still waiting for stop event.
L10 T2244 536625 [ServiceInitialize] Still waiting for stop event.
L10 T2244 541625 [ServiceInitialize] Still waiting for stop event.
L10 T2244 546625 [ServiceInitialize] Still waiting for stop event.
L10 T2244 551625 [ServiceInitialize] Still waiting for stop event.
L10 T2244 556625 [ServiceInitialize] Still waiting for stop event.
L10 T2244 561625 [ServiceInitialize] Still waiting for stop event.
L10 T2244 566625 [ServiceInitialize] Still waiting for stop event.
L10 T2244 571625 [ServiceInitialize] Still waiting for stop event.
L10 T2244 576625 [ServiceInitialize] Still waiting for stop event.
L10 T2244 581625 [ServiceInitialize] Still waiting for stop event.
L10 T2244 586625 [ServiceInitialize] Still waiting for stop event.
L10 T2244 591625 [ServiceInitialize] Still waiting for stop event.
L10 T2244 596625 [ServiceInitialize] Still waiting for stop event.
L10 T2244 601625 [ServiceInitialize] Still waiting for stop event.
L10 T2244 606625 [ServiceInitialize] Still waiting for stop event.
L10 T2244 611625 [ServiceInitialize] Still waiting for stop event.
L10 T2244 616625 [ServiceInitialize] Still waiting for stop event.
L10 T2244 621625 [ServiceInitialize] Still waiting for stop event.
L10 T2244 626625 [ServiceInitialize] Still waiting for stop event.
L10 T2244 631625 [ServiceInitialize] Still waiting for stop event.

没有任何事件，直到Windows放弃并杀死它。

Answer 1

根据文档 ，SERVICE_CONTROL_PRESHUTDOWN仅发送到扩展回调 。 尝试使用RegisterServiceCtrlHandlerEx 。