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WMI获取系统信息 得到product name

分类： C/C++

2013-10-11 15:57:39

利用WMI获取系统信息，
一般步骤：
1. 通过调用CoInitialzeEx来初始化COM参数.

2. 通过调用CoInitializeSecurity来初始化COM过程安全.

3. 通过调用CoCreateInstance来实例化。

4. 通过调用IWbemLocator::ConnectServer来获取一个本机root\cimv2命名空间的IWbemServices的指针。（注意在字符串中要写“root\\cimv2”,两个\\）

5. 设置IWbemServices代理安全，WMI service可以通过调用CoSetProxyBlanket来模拟客户端。

6. 用IWbmeServices指针来查询WMI. 本例子通过调用IWbemServies::ExecQuery 来查询操作系统名称.
   SELEC * FROM Win32_OperatingSystem 
7. 获取和现实WQL查询的数据. 

WMI 可以访问的信息类型有:
   Win32_1394Controller
   Win32_BaseBoard
   Win32_Battery
   Win32_BIOS
   Win32_Bus
   Win32_CacheMemory
   Win32_CDROMDrive
   Win32_CurrentProbe
   Win32_DesktopMonitor
   Win32_DeviceMemoryAddress
   Win32_DiskDrive
   Win32_DisplayConfiguration
   Win32_DisplayControllerConfiguration
   Win32_DMAChannel
   Win32_Fan
   Win32_FloppyController
   Win32_FloppyDrive
   Win32_HeatPipe
   Win32_IDEController
   Win32_InfraredDevice
   Win32_IRQResource
   Win32_Keyboard
   Win32_MemoryArray
   Win32_MemoryDevice
   Win32_MotherboardDevice
   Win32_NetworkAdapter
   Win32_NetworkAdapterConfiguration
   Win32_OnBoardDevice
   Win32_ParallelPort
   Win32_PCMCIAController
   Win32_PhysicalMemory
   Win32_PhysicalMemoryArray
   Win32_PnPEntity
   Win32_PointingDevice
   Win32_PortableBattery
   Win32_PortConnector
   Win32_PortResource
   Win32_POTSModem
   Win32_PowerManagementEvent
   Win32_Printer
   Win32_PrinterConfiguration
   Win32_PrintJob
   Win32_Processor
   Win32_Refrigeration
   Win32_SerialPort
   Win32_SerialPortConfiguration
   Win32_SMBIOSMemory
   Win32_SoundDevice
   Win32_SystemEnclosure
   Win32_SystemMemoryResource
   Win32_SystemSlot
   Win32_TapeDrive
   Win32_TemperatureProbe
   Win32_UninterruptiblePowerSupply
   Win32_USBController
   Win32_VideoConfiguration
   Win32_VideoController
   Win32_VoltageProbe

下面是自己写的得到product name的示例程序，dos下的命令语句是wmic.exe baseboard get product

.h文件

点击(此处)折叠或打开

  1. /*
  2. 通过WMI，得到product name
  3. */
  4. #pragma once
  5. #include "stdafx.h"
  6. #include <comdef.h>
  7. #include <Wbemidl.h>
  8. #include <Wbemcli.h>
  9. #include <conio.h>

  11. class GetProductName
  12. {
  13. public:
  14.     GetProductName();
  15.     ~GetProductName();
  16.     //正确返回0，错误返回非0
  17.     //nName:out 得到的product name
  18.     int Get(CString & nName);

  20. private:
  21.     HRESULT hres;
  22.     IEnumWbemClassObject* pEnumerator;
  23.     IWbemLocator *pLoc;
  24.     IWbemServices *pSvc;

  26.     // Step 1:
  27.     // Initialize COM.
  28.     BOOL Setp1(void);

  30.     // Step 2: --------------------------------------------------
  31.     // Set general COM security levels --------------------------
  32.     // Note: If you are using Windows 2000, you need to specify -
  33.     // the default authentication credentials for a user by using
  34.     // a SOLE_AUTHENTICATION_LIST structure in the pAuthList ----
  35.     // parameter of CoInitializeSecurity ------------------------
  36.     BOOL Setp2(void);

  38.     // Step 3: ---------------------------------------------------
  39.     // Obtain the initial locator to WMI -------------------------
  40.     BOOL Setp3(void);

  42.     // Step 4: -----------------------------------------------------
  43.     // Connect to WMI through the IWbemLocator::ConnectServer method
  44.     // Connect to the root/cimv2 namespace with
  45.     // the current user and obtain pointer pSvc
  46.     // to make IWbemServices calls.
  47.     BOOL Setp4(void);

  49.     // Step 5: --------------------------------------------------
  50.     // Set security levels on the proxy -------------------------
  51.     BOOL Setp5(void);

  53.     // Step 6: --------------------------------------------------
  54.     // Use the IWbemServices pointer to make requests of WMI ----
  55.     // get the product name of the baseboard
  56.     BOOL Setp6(void);

  58.     // Step 7: -------------------------------------------------
  59.     // Get the data from the query in step 6 -------------------
  60.     BOOL Setp7(CString & nName);
  61. };

.cpp

点击(此处)折叠或打开

  1. #include "stdafx.h"
  2. #include "GetProductName.h"

  4. #pragma comment(lib, "wbemuuid.lib")

  6. using namespace std;

  8. GetProductName::GetProductName()
  9. {
  10.     hres = NULL;
  11.     pEnumerator = NULL;
  12.     pLoc = NULL;
  13.     pSvc = NULL;
  14. }
  15. GetProductName::~GetProductName()
  16. {
  17. }
  18. BOOL GetProductName::Setp1(void)
  19. {
  20.     // Step 1: --------------------------------------------------
  21.     // Initialize COM. ------------------------------------------

  23.     hres = CoInitializeEx(0, COINIT_MULTITHREADED);
  24.     if (FAILED(hres))
  25.     {
  26.         return FALSE; // Program has failed.
  27.     }
  28.     return TRUE;
  29. }
  30. BOOL GetProductName::Setp2(void)
  31. {
  32.     // Step 2: --------------------------------------------------
  33.     // Set general COM security levels --------------------------
  34.     // Note: If you are using Windows 2000, you need to specify -
  35.     // the default authentication credentials for a user by using
  36.     // a SOLE_AUTHENTICATION_LIST structure in the pAuthList ----
  37.     // parameter of CoInitializeSecurity ------------------------

  39.     hres = CoInitializeSecurity(
  40.         NULL,
  41.         -1, // COM authentication
  42.         NULL, // Authentication services
  43.         NULL, // Reserved
  44.         RPC_C_AUTHN_LEVEL_DEFAULT, // Default authentication
  45.         RPC_C_IMP_LEVEL_IMPERSONATE, // Default Impersonation
  46.         NULL, // Authentication info
  47.         EOAC_NONE, // Additional capabilities
  48.         NULL // Reserved
  49.         );


  52.     if (FAILED(hres))
  53.     {
  54.         CoUninitialize();
  55.         return FALSE; // Program has failed.
  56.     }
  57.     return TRUE;
  58. }
  59. BOOL GetProductName::Setp3(void)
  60. {
  61.     // Step 3: ---------------------------------------------------
  62.     // Obtain the initial locator to WMI -------------------------

  64.     hres = CoCreateInstance(
  65.         CLSID_WbemLocator,
  66.         0,
  67.         CLSCTX_INPROC_SERVER,
  68.         IID_IWbemLocator, (LPVOID *) &pLoc);

  70.     if (FAILED(hres))
  71.     {
  72.         CoUninitialize();
  73.         return FALSE; // Program has failed.
  74.     }
  75.     return TRUE;
  76. }
  77. BOOL GetProductName::Setp4(void)
  78. {
  79.     // Step 4: -----------------------------------------------------
  80.     // Connect to WMI through the IWbemLocator::ConnectServer method

  82.     // Connect to the root/cimv2 namespace with
  83.     // the current user and obtain pointer pSvc
  84.     // to make IWbemServices calls.
  85.     hres = pLoc->ConnectServer(
  86.         _bstr_t(L"ROOT\\CIMV2"), // Object path of WMI namespace
  87.         NULL, // User name. NULL = current user
  88.         NULL, // User password. NULL = current
  89.         0, // Locale. NULL indicates current
  90.         NULL, // Security flags.
  91.         0, // Authority (e.g. Kerberos)
  92.         0, // Context object
  93.         &pSvc // pointer to IWbemServices proxy
  94.         );

  96.     if (FAILED(hres))
  97.     {
  98.         pLoc->Release();
  99.         CoUninitialize();
  100.         return FALSE; // Program has failed.
  101.     }
  102.     return TRUE;
  103. }
  104. BOOL GetProductName::Setp5(void)
  105. {
  106.     // Step 5: --------------------------------------------------
  107.     // Set security levels on the proxy -------------------------

  109.     hres = CoSetProxyBlanket(
  110.         pSvc, // Indicates the proxy to set
  111.         RPC_C_AUTHN_WINNT, // RPC_C_AUTHN_xxx
  112.         RPC_C_AUTHZ_NONE, // RPC_C_AUTHZ_xxx
  113.         NULL, // Server principal name
  114.         RPC_C_AUTHN_LEVEL_CALL, // RPC_C_AUTHN_LEVEL_xxx
  115.         RPC_C_IMP_LEVEL_IMPERSONATE, // RPC_C_IMP_LEVEL_xxx
  116.         NULL, // client identity
  117.         EOAC_NONE // proxy capabilities
  118.         );

  120.     if (FAILED(hres))
  121.     {
  122.         pSvc->Release();
  123.         pLoc->Release();
  124.         CoUninitialize();
  125.         return FALSE; // Program has failed.
  126.     }
  127.     return TRUE;
  128. }
  129. BOOL GetProductName::Setp6(void)
  130. {
  131.     // Step 6: --------------------------------------------------
  132.     // Use the IWbemServices pointer to make requests of WMI ----
  133.     // get the product name of the baseboard

  135.     hres = pSvc->ExecQuery(bstr_t("WQL"), bstr_t("SELECT * FROM Win32_BaseBoard"),
  136.         WBEM_FLAG_FORWARD_ONLY | WBEM_FLAG_RETURN_IMMEDIATELY, NULL, &pEnumerator);
  137.     if (FAILED(hres))
  138.     {
  139.         pSvc->Release();
  140.         return FALSE; // Program has failed.
  141.     }
  142.     return TRUE;
  143. }
  144. BOOL GetProductName::Setp7(CString & nName)
  145. {
  146.     // Step 7: -------------------------------------------------
  147.     // Get the data from the query in step 6 -------------------
  148.     IWbemClassObject *pclsObj = NULL;

  150.     ULONG ulReturn = 0;

  152.     do
  153.     {
  154.         HRESULT hr = pEnumerator->Next(WBEM_INFINITE, 1, &pclsObj, &ulReturn);
  155.         if (!SUCCEEDED(hr))
  156.         {
  157.             break;
  158.             return FALSE;
  159.         }

  161.         VARIANT vtProp;
  162.         VariantInit(&vtProp);

  164.         hr = pclsObj->Get(L"product", 0, &vtProp, 0, 0);

  166.         nName = vtProp.bstrVal;

  168.         VariantClear(&vtProp);
  169.     } while(FALSE);

  171.     pEnumerator->Release();
  172.     pclsObj->Release();
  173.     return TRUE;
  174. }
  175. int GetProductName::Get(CString & nName)
  176. {
  177.     int lreturn = 0;
  178.     do
  179.     {
  180.         if (Setp1() == FALSE)
  181.         {
  182.             lreturn = 1;
  183.             break;
  184.         }
  185.         if (Setp2() == FALSE)
  186.         {
  187.             lreturn = 2;
  188.             break;
  189.         }
  190.         if (Setp3() == FALSE)
  191.         {
  192.             lreturn = 3;
  193.             break;
  194.         }
  195.         if (Setp4() == FALSE)
  196.         {
  197.             lreturn = 4;
  198.             break;
  199.         }
  200.         if (Setp5() == FALSE)
  201.         {
  202.             lreturn = 5;
  203.             break;
  204.         }
  205.         if (Setp6() == FALSE)
  206.         {
  207.             lreturn = 6;
  208.             break;
  209.         }
  210.         if (Setp7(nName) == FALSE)
  211.         {
  212.             lreturn = 7;
  213.             break;
  214.         }
  215.     } while (FALSE);

  217.     // Cleanup
  218.     pSvc->Release();
  219.     pLoc->Release();
  220.     CoUninitialize();
  221.     return lreturn;
  222. }


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