c - 如何获取卷GUID路径所属的物理设备？

Question

我需要使用 winapi 将卷 GUID 路径转换为物理驱动器路径。

我使用 FindFirstVolume/FindNextVolume 列出了我的电脑上的卷，并得到以下输出:

First volume found: \\?\Volume{42f73c69-4b40-11e9-a0b2-806e6f6e6963}\
Found next volume:  \\?\Volume{8aef5fee-0000-0000-0000-100000000000}\
Found next volume:  \\?\Volume{8aef5fee-0000-0000-0000-90c30b000000}\
Found next volume:  \\?\Volume{8aef5fee-0000-0000-0000-501f1e000000}\
Found next volume:  \\?\Volume{ec716472-e587-11e8-a031-806e6f6e6963}\
Search finished: [18] There are no more files.

我需要知道每个卷所属的物理设备，例如 \\.\PHYSICALDRIVE1

这是我的代码:

/* This program attempts to list the volumes and get the corresponding physical device for each one */

#include <stdio.h>
#include <windows.h>

HANDLE openDevice(const char *deviceID);
BOOL getAllVolumes();

/* Main function
   * Access the device
   * Get all volume GUID paths
   * Close handler
*/
int main()
{
    char *deviceID = "\\\\.\\PHYSICALDRIVE1";
    HANDLE hDevice = openDevice(deviceID);
    if (hDevice != INVALID_HANDLE_VALUE) { /* success */
        fprintf(stderr, "Device %s opened.\n", deviceID);
        /* find all volumes in the device and get the corresponding device to each one */
        BOOL result = getAllVolumes();
        CloseHandle(hDevice); /* close the handler to the device */
    }

    return 0;
}

HANDLE openDevice(const char *deviceID)
{
    /* Access the device */
    HANDLE hDevice = CreateFileA(
        deviceID, /* device id (get it with `$ wmic DISKDRIVE`) */
        FILE_READ_DATA | FILE_WRITE_DATA, /* read/write access */
        FILE_SHARE_READ | FILE_SHARE_WRITE, /* shared */
        NULL, /* default security attributes */
        OPEN_EXISTING, /* only open if the device exists */
        0, /* file attributes */
        NULL); /* do not copy file attributes */

    if (hDevice == INVALID_HANDLE_VALUE) { /* cannot open the physical drive */
        DWORD errorCode = GetLastError();
        fprintf(stderr, "Cannot open the device %s: [%lu]\n", deviceID, errorCode); /* print the error code and message */
    }

    return hDevice;
}

BOOL getAllVolumes()
{
    char volumePath[512] = {0};
    fprintf(stderr, "Attempt to find first volume...\n");
    HANDLE searchHandlerDevice = FindFirstVolume(volumePath, sizeof(volumePath));
    fprintf(stderr, "Done. Retrieving results...\n");
    if (searchHandlerDevice == INVALID_HANDLE_VALUE) {
        DWORD errorCode = GetLastError();
        fprintf(stderr, "Cannot find a volume: [%lu]\n", errorCode); /* print the error code and message */
        return FALSE;
    } else {
        fprintf(stdout, "First volume found: %s\n", volumePath);
    }

    /* find the other volumes */
    while (FindNextVolume(searchHandlerDevice, volumePath, sizeof(volumePath))) {
        fprintf(stdout, "Found volume: %s\n", volumePath);
    }

    /* searching failed */
    DWORD errorCode = GetLastError();
    fprintf(stderr, "Search failed: [%lu]\n", errorCode); /* print the error code and message */

    /* close the search */
    BOOL result = FindVolumeClose(searchHandlerDevice);
    if (!result) {
        fprintf(stderr, "Search failed: [%lu]\n", errorCode); /* print the error code */
    }

    return result;
}

Answer 1

嗯，我在 DiskDrive 中找到了答案类(class)。它代表运行 Windows 操作系统的计算机所看到的物理磁盘驱动器。