这次使用 SetupDiGetClassDevs 和 SetupDiEnumDeviceInterfaces 函数直接查询系统中的硬盘信息。具体的解释，请参考
http://cutebunny.blog.51cto.com/301216/625577 《windows的磁盘操作之七——获取当前所有的物理磁盘号》 这是非常好的文章。
枚举的结果并非 \\.\PhysicalDriveX 而是类似 \\?\usbstor#disk&ven_adata&prod_usb_flash_drive&rev_1.00#000000000000000922&0#{53f56307-b6bf-11d0-94f2-00a0c91efb8b} 这样的字符串。(天杀同学指出：这种符号连接，是链接到atapi生成的设备，比如\device\ide\idedeviceP0TTolo-3这种设备上的，这个设备上面会附加\Device\Harddisk0\DR0，应用程序打开\\?\ide#xxxx这个，就和打开\\.\PhysicalDrive0一样了，因为请求在驱动里面都是从上层往下层传递的. )同样可以直接给CreateFile作为参数使用。
另外，这个程序如果直接运行，会出现打印出来上述字符串，然后又显示 “CreateFile() Error: 5”的问题。这个错误表示 “Access denied”.
它是由于在程序中使用CreateFile而没有相应的权限导致的。
程序中使用了很多C语言的变长数组，这在我看起来无比诡异…….
编译中需要加入 lib，具体方式请参考下图
运行结果如下图，可以看到，最后还给出了硬盘号。
这样的方法更精确一些，在很多硬盘的情况下会节省查询的时间，但是和1中的方法相比，复杂度提高了很多倍。
代码如下
// phylist1.cpp : Defines the entry point for the console application.
//
#include "stdafx.h"
#include <windows.h>
#include <stdio.h>
#include <conio.h>
#include <winioctl.h>
#include <setupapi.h>
#define MAX_DEVICE 10
#define INTERFACE_DETAIL_SIZE (1024)
DEFINE_GUID(GUID_DEVINTERFACE_DISK, 0x53f56307L, 0xb6bf, 0x11d0, 0x94, 0xf2, 0x00, 0xa0, 0xc9, 0x1e, 0xfb, 0x8b);
/******************************************************************************
* Function: get device path from GUID
* input: lpGuid, GUID pointer
* output: pszDevicePath, device paths
* return: Succeed, the amount of found device paths
* Fail, -1
******************************************************************************/
DWORD GetDevicePath(LPGUID lpGuid, WCHAR **pszDevicePath)
{
HDEVINFO hDevInfoSet;
SP_DEVICE_INTERFACE_DATA ifdata;
PSP_DEVICE_INTERFACE_DETAIL_DATA pDetail;
DWORD nCount;
BOOL result;
//get a handle to a device information set
hDevInfoSet = SetupDiGetClassDevs(
lpGuid, // class GUID
NULL, // Enumerator
NULL, // hwndParent
DIGCF_PRESENT | DIGCF_DEVICEINTERFACE // present devices
);
//fail...
if (hDevInfoSet == INVALID_HANDLE_VALUE)
{
fprintf(stderr, "IOCTL_STORAGE_GET_DEVICE_NUMBER Error: %ld\n", GetLastError());
return (DWORD)-1;
}
pDetail = (PSP_DEVICE_INTERFACE_DETAIL_DATA)malloc(INTERFACE_DETAIL_SIZE);
if (pDetail == NULL)
{
return (DWORD)-1;
}
pDetail->cbSize = sizeof(SP_DEVICE_INTERFACE_DETAIL_DATA);
nCount = 0;
result = TRUE;
// device index = 0, 1, 2... test the device interface one by one
while (result)
{
ifdata.cbSize = sizeof(ifdata);
//enumerates the device interfaces that are contained in a device information set
result = SetupDiEnumDeviceInterfaces(
hDevInfoSet, // DeviceInfoSet
NULL, // DeviceInfoData
lpGuid, // GUID
nCount, // MemberIndex
&ifdata // DeviceInterfaceData
);
if (result)
{
// get details about a device interface
result = SetupDiGetDeviceInterfaceDetail(
hDevInfoSet, // DeviceInfoSet
&ifdata, // DeviceInterfaceData
pDetail, // DeviceInterfaceDetailData
INTERFACE_DETAIL_SIZE, // DeviceInterfaceDetailDataSize
NULL, // RequiredSize
NULL // DeviceInfoData
);
if (result)
{
// copy the path to output buffer
wcscpy(pszDevicePath[nCount], pDetail->DevicePath);
printf("%ws\n", pDetail->DevicePath);
nCount++;
}
}
}
free(pDetail);
(void)SetupDiDestroyDeviceInfoList(hDevInfoSet);
return nCount;
}
/******************************************************************************
* Function: get all present disks' physical number
* input: N/A
* output: ppDisks, array of disks' physical number
* return: Succeed, the amount of present disks
* Fail, -1
******************************************************************************/
DWORD GetAllPresentDisks(DWORD **ppDisks)
{
WCHAR *szDevicePath[MAX_DEVICE]; // device path
DWORD nDevice;
HANDLE hDevice;
STORAGE_DEVICE_NUMBER number;
BOOL result;
DWORD readed;
WORD i, j;
for (i = 0; i < MAX_DEVICE; i++)
{
szDevicePath[i] = (WCHAR *)malloc(INTERFACE_DETAIL_SIZE);
if (NULL == szDevicePath[i])
{
for (j = 0; j < i; j++)
{
free(szDevicePath[i]);
}
return (DWORD)-1;
}
}
// get the device paths
nDevice = GetDevicePath(const_cast<LPGUID>(&GUID_DEVINTERFACE_DISK), szDevicePath);
if ((DWORD)-1 == nDevice)
{
for (i = 0; i < MAX_DEVICE; i++)
{
free(szDevicePath[i]);
}
return (DWORD)-1;
}
*ppDisks = (DWORD *)malloc(sizeof(DWORD) * nDevice);
// get the disk's physical number one by one
for (i = 0; i < nDevice; i++)
{
hDevice = CreateFile(
szDevicePath[i], // drive to open
GENERIC_READ | GENERIC_WRITE, // access to the drive
FILE_SHARE_READ | FILE_SHARE_WRITE, //share mode
NULL, // default security attributes
OPEN_EXISTING, // disposition
0, // file attributes
NULL // do not copy file attribute
);
if (hDevice == INVALID_HANDLE_VALUE) // cannot open the drive
{
for (j = 0; j < MAX_DEVICE; j++)
{
free(szDevicePath[j]);
}
free(*ppDisks);
fprintf(stderr, "CreateFile() Error: %ld\n", GetLastError());
return DWORD(-1);
}
result = DeviceIoControl(
hDevice, // handle to device
IOCTL_STORAGE_GET_DEVICE_NUMBER, // dwIoControlCode
NULL, // lpInBuffer
0, // nInBufferSize
&number, // output buffer
sizeof(number), // size of output buffer
&readed, // number of bytes returned
NULL // OVERLAPPED structure
);
if (!result) // fail
{
fprintf(stderr, "IOCTL_STORAGE_GET_DEVICE_NUMBER Error: %ld\n", GetLastError());
for (j = 0; j < MAX_DEVICE; j++)
{
free(szDevicePath[j]);
}
free(*ppDisks);
(void)CloseHandle(hDevice);
return (DWORD)-1;
}
*(*ppDisks + i) = number.DeviceNumber;
// printf("%d\n",number.DeviceNumber);
(void)CloseHandle(hDevice);
}
for (i = 0; i < MAX_DEVICE; i++)
{
free(szDevicePath[i]);
}
return nDevice;
}
int _tmain(int argc, _TCHAR* argv[])
{
DWORD *pDisk;
int t,j;
t=GetAllPresentDisks(&pDisk);
for (j=0; j<t;j++)
{
printf("%d \n", *pDisk++);
}
_getch();
return 0;
}
完整代码下载