DevCon install命令实现

先创建设备，然后再执行的是devcon update命令，即调用cmdUpdate函数

int cmdInstall(_In_ LPCTSTR BaseName, _In_opt_ LPCTSTR Machine, _In_ DWORD Flags, _In_ int argc, _In_reads_(argc) PTSTR argv[])
/*++

Routine Description:

    CREATE
    Creates a root enumerated devnode and installs drivers on it

Arguments:

    BaseName  - name of executable
    Machine   - machine name, must be NULL
    argc/argv - remaining parameters

Return Value:

    EXIT_xxxx

--*/
{
    HDEVINFO DeviceInfoSet = INVALID_HANDLE_VALUE;
    SP_DEVINFO_DATA DeviceInfoData;
    GUID ClassGUID;
    TCHAR ClassName[MAX_CLASS_NAME_LEN];
    TCHAR hwIdList[LINE_LEN+4];
    TCHAR InfPath[MAX_PATH];
    int failcode = EXIT_FAIL;
    LPCTSTR hwid = NULL;
    LPCTSTR inf = NULL;

    if(Machine) {
        //
        // must be local machine
        //
        return EXIT_USAGE;
    }
    if(argc<2) {
        //
        // at least HWID required
        //
        return EXIT_USAGE;
    }
    inf = argv[0];
    if(!inf[0]) {
        return EXIT_USAGE;
    }

    hwid = argv[1];
    if(!hwid[0]) {
        return EXIT_USAGE;
    }

    //
    // Inf must be a full pathname
    //
    if(GetFullPathName(inf,MAX_PATH,InfPath,NULL) >= MAX_PATH) {
        //
        // inf pathname too long
        //
        return EXIT_FAIL;
    }

    //
    // List of hardware ID's must be double zero-terminated
    //
    ZeroMemory(hwIdList,sizeof(hwIdList));
    if (FAILED(StringCchCopy(hwIdList,LINE_LEN,hwid))) {
        goto final;
    }

    //
    // Use the INF File to extract the Class GUID.
    //
    if (!SetupDiGetINFClass(InfPath,&ClassGUID,ClassName,sizeof(ClassName)/sizeof(ClassName[0]),0))
    {
        goto final;
    }

    //
    // Create the container for the to-be-created Device Information Element.
    //
    DeviceInfoSet = SetupDiCreateDeviceInfoList(&ClassGUID,0);
    if(DeviceInfoSet == INVALID_HANDLE_VALUE)
    {
        goto final;
    }

    //
    // Now create the element.
    // Use the Class GUID and Name from the INF file.
    //
    DeviceInfoData.cbSize = sizeof(SP_DEVINFO_DATA);
    if (!SetupDiCreateDeviceInfo(DeviceInfoSet,
        ClassName,
        &ClassGUID,
        NULL,
        0,
        DICD_GENERATE_ID,
        &DeviceInfoData))
    {
        goto final;
    }

    //
    // Add the HardwareID to the Device's HardwareID property.
    //
    if(!SetupDiSetDeviceRegistryProperty(DeviceInfoSet,
        &DeviceInfoData,
        SPDRP_HARDWAREID,
        (LPBYTE)hwIdList,
        ((DWORD)_tcslen(hwIdList)+1+1)*sizeof(TCHAR)))
    {
        goto final;
    }

    //
    // Transform the registry element into an actual devnode
    // in the PnP HW tree.
    //
    if (!SetupDiCallClassInstaller(DIF_REGISTERDEVICE,
        DeviceInfoSet,
        &DeviceInfoData))
    {
        goto final;
    }

    FormatToStream(stdout,MSG_INSTALL_UPDATE);
    //
    // update the driver for the device we just created
    //
    failcode = cmdUpdate(BaseName,Machine,Flags,argc,argv);

final:

    if (DeviceInfoSet != INVALID_HANDLE_VALUE) {
        SetupDiDestroyDeviceInfoList(DeviceInfoSet);
    }

    return failcode;
}