c++ - Windows 7 和 10 是否需要不同的用户权限才能启动服务？

Question

我可以在 Windows 7 中从命令提示符启动 Windows 服务，而无需以管理员身份运行命令窗口，如下所示：

sc start myservice

但是，如果我在 Windows 10 上做同样的事情，它不会启动服务，并返回“拒绝访问”错误。如果我以管理员身份启动命令窗口，它确实可以正常启动。

我真正想要的是从 C++ 代码启动服务，但是 Windows 10 上的管理权限妨碍了我。Windows 7 和 10 之间似乎有明显的区别，但OpenService()文档根本没有谈论它！

现在，问我们是否可以解决这个安全问题是一个愚蠢的问题，但是是否可以通过设置某些安全属性来解决它？

在下面的代码中，OpenService()失败并显示错误代码 5，因为它正在请求SERVICE_START权限：

void DoStartSvc()
{
    SERVICE_STATUS_PROCESS ssStatus;
    DWORD dwOldCheckPoint;
    DWORD dwStartTickCount;
    DWORD dwWaitTime;
    DWORD dwBytesNeeded;

    TCHAR szSvcName[256] = _T("MyService");
    SC_HANDLE schSCManager;
    SC_HANDLE schService;

    // Get a handle to the SCM database. 

    schSCManager = OpenSCManager(
        NULL,                    // local computer
        NULL,                    // servicesActive database 
        SC_MANAGER_CONNECT);  // use SC_MANAGER_ALL_ACCESS for full access rights 

    if (NULL == schSCManager)
    {
        printf("OpenSCManager failed (%d)\n", GetLastError());
        return;
    }

    // Get a handle to the service.

    schService = OpenService(
        schSCManager,         // SCM database 
        szSvcName,            // name of service 
        SERVICE_QUERY_STATUS | SERVICE_START );  // use SERVICE_ALL_ACCESS for full access 

    if (schService == NULL)
    {
        printf("OpenService failed (%d)\n", GetLastError());
        CloseServiceHandle(schSCManager);
        return;
    }

    // Check the status in case the service is not stopped. 

    if (!QueryServiceStatusEx(
        schService,                     // handle to service 
        SC_STATUS_PROCESS_INFO,         // information level
        (LPBYTE)& ssStatus,             // address of structure
        sizeof(SERVICE_STATUS_PROCESS), // size of structure
        &dwBytesNeeded))              // size needed if buffer is too small
    {
        printf("QueryServiceStatusEx failed (%d)\n", GetLastError());
        CloseServiceHandle(schService);
        CloseServiceHandle(schSCManager);
        return;
    }

    // Check if the service is already running. It would be possible 
    // to stop the service here, but for simplicity this example just returns. 

    if (ssStatus.dwCurrentState != SERVICE_STOPPED && ssStatus.dwCurrentState != SERVICE_STOP_PENDING)
    {
        printf("Cannot start the service because it is already running\n");
        CloseServiceHandle(schService);
        CloseServiceHandle(schSCManager);
        return;
    }

    // Save the tick count and initial checkpoint.

    dwStartTickCount = GetTickCount();
    dwOldCheckPoint = ssStatus.dwCheckPoint;

    // Wait for the service to stop before attempting to start it.

    while (ssStatus.dwCurrentState == SERVICE_STOP_PENDING)
    {
        // Do not wait longer than the wait hint. A good interval is 
        // one-tenth of the wait hint but not less than 1 second  
        // and not more than 10 seconds. 

        dwWaitTime = ssStatus.dwWaitHint / 10;

        if (dwWaitTime < 1000)
            dwWaitTime = 1000;
        else if (dwWaitTime > 10000)
            dwWaitTime = 10000;

        Sleep(dwWaitTime);

        // Check the status until the service is no longer stop pending. 

        if (!QueryServiceStatusEx(
            schService,                     // handle to service 
            SC_STATUS_PROCESS_INFO,         // information level
            (LPBYTE)&ssStatus,             // address of structure
            sizeof(SERVICE_STATUS_PROCESS), // size of structure
            &dwBytesNeeded))              // size needed if buffer is too small
        {
            printf("QueryServiceStatusEx failed (%d)\n", GetLastError());
            CloseServiceHandle(schService);
            CloseServiceHandle(schSCManager);
            return;
        }

        if (ssStatus.dwCheckPoint > dwOldCheckPoint)
        {
            // Continue to wait and check.

            dwStartTickCount = GetTickCount();
            dwOldCheckPoint = ssStatus.dwCheckPoint;
        }
        else
        {
            if (GetTickCount() - dwStartTickCount > ssStatus.dwWaitHint)
            {
                printf("Timeout waiting for service to stop\n");
                CloseServiceHandle(schService);
                CloseServiceHandle(schSCManager);
                return;
            }
        }
    }

    // Attempt to start the service.

    if (!StartService(
        schService,  // handle to service 
        0,           // number of arguments 
        NULL))      // no arguments 
    {
        printf("StartService failed (%d)\n", GetLastError());
        CloseServiceHandle(schService);
        CloseServiceHandle(schSCManager);
        return;
    }
    else printf("Service start pending...\n");

    // Check the status until the service is no longer start pending. 

    if (!QueryServiceStatusEx(
        schService,                     // handle to service 
        SC_STATUS_PROCESS_INFO,         // info level
        (LPBYTE)&ssStatus,             // address of structure
        sizeof(SERVICE_STATUS_PROCESS), // size of structure
        &dwBytesNeeded))              // if buffer too small
    {
        printf("QueryServiceStatusEx failed (%d)\n", GetLastError());
        CloseServiceHandle(schService);
        CloseServiceHandle(schSCManager);
        return;
    }

    // Save the tick count and initial checkpoint.

    dwStartTickCount = GetTickCount();
    dwOldCheckPoint = ssStatus.dwCheckPoint;

    while (ssStatus.dwCurrentState == SERVICE_START_PENDING)
    {
        // Do not wait longer than the wait hint. A good interval is 
        // one-tenth the wait hint, but no less than 1 second and no 
        // more than 10 seconds. 

        dwWaitTime = ssStatus.dwWaitHint / 10;

        if (dwWaitTime < 1000)
            dwWaitTime = 1000;
        else if (dwWaitTime > 10000)
            dwWaitTime = 10000;

        Sleep(dwWaitTime);

        // Check the status again. 

        if (!QueryServiceStatusEx(
            schService,             // handle to service 
            SC_STATUS_PROCESS_INFO, // info level
            (LPBYTE)&ssStatus,             // address of structure
            sizeof(SERVICE_STATUS_PROCESS), // size of structure
            &dwBytesNeeded))              // if buffer too small
        {
            printf("QueryServiceStatusEx failed (%d)\n", GetLastError());
            break;
        }

        if (ssStatus.dwCheckPoint > dwOldCheckPoint)
        {
            // Continue to wait and check.

            dwStartTickCount = GetTickCount();
            dwOldCheckPoint = ssStatus.dwCheckPoint;
        }
        else
        {
            if (GetTickCount() - dwStartTickCount > ssStatus.dwWaitHint)
            {
                // No progress made within the wait hint.
                break;
            }
        }
    }

    // Determine whether the service is running.

    if (ssStatus.dwCurrentState == SERVICE_RUNNING)
    {
        printf("Service started successfully.\n");
    }
    else
    {
        printf("Service not started. \n");
        printf("  Current State: %d\n", ssStatus.dwCurrentState);
        printf("  Exit Code: %d\n", ssStatus.dwWin32ExitCode);
        printf("  Check Point: %d\n", ssStatus.dwCheckPoint);
        printf("  Wait Hint: %d\n", ssStatus.dwWaitHint);
    }

    CloseServiceHandle(schService);
    CloseServiceHandle(schSCManager);
}

标签： c++servicewindows-7windows-10