c语言 读取windows系统分区表

要在C语言中读取Windows系统分区表，可以使用Windows API函数来实现。以下是使用Windows API函数读取系统分区表的示例代码：

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

int main()
{
    HANDLE hDevice = CreateFile("\\\\.\\PhysicalDrive0", GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL);

    if (hDevice == INVALID_HANDLE_VALUE)
    {
        printf("Failed to open disk! Error code: %d\n", GetLastError());
        return 1;
    }

    STORAGE_PROPERTY_QUERY storagePropertyQuery;
    ZeroMemory(&storagePropertyQuery, sizeof(storagePropertyQuery));
    storagePropertyQuery.PropertyId = StorageDeviceProperty;
    storagePropertyQuery.QueryType = PropertyStandardQuery;

    STORAGE_DEVICE_DESCRIPTOR storageDeviceDescriptor;
    ZeroMemory(&storageDeviceDescriptor, sizeof(storageDeviceDescriptor));

    DWORD dwBytesReturned;
    if (!DeviceIoControl(hDevice, IOCTL_STORAGE_QUERY_PROPERTY, &storagePropertyQuery, sizeof(storagePropertyQuery), &storageDeviceDescriptor, sizeof(storageDeviceDescriptor), &dwBytesReturned, NULL))
    {
        printf("Failed to get device descriptor! Error code: %d\n", GetLastError());
        CloseHandle(hDevice);
        return 1;
    }

    BYTE* buffer = (BYTE*)malloc(storageDeviceDescriptor.Size);
    ZeroMemory(buffer, storageDeviceDescriptor.Size);

    if (!DeviceIoControl(hDevice, IOCTL_DISK_GET_DRIVE_LAYOUT_EX, NULL, 0, buffer, storageDeviceDescriptor.Size, &dwBytesReturned, NULL))
    {
        printf("Failed to get partition table! Error code: %d\n", GetLastError());
        CloseHandle(hDevice);
        free(buffer);
        return 1;
    }

    PDRIVE_LAYOUT_INFORMATION_EX driveLayoutInformation = (PDRIVE_LAYOUT_INFORMATION_EX)buffer;

    printf("Drive layout:\n");
    printf("Signature: 0x%08X\n", driveLayoutInformation->Mbr.Signature);

    for (int i = 0; i < driveLayoutInformation->PartitionCount; i++)
    {
        PARTITION_INFORMATION_EX partitionInformation = driveLayoutInformation->PartitionEntry[i].PartitionInformation;

        printf("\nPartition %d:\n", i + 1);
        printf("Partition type: 0x%02X\n", partitionInformation.PartitionType);
        printf("Partition number: %d\n", partitionInformation.PartitionNumber);
        printf("Starting offset: %lld\n", partitionInformation.StartingOffset.QuadPart);
        printf("Partition length: %lld\n", partitionInformation.PartitionLength.QuadPart);
    }

    CloseHandle(hDevice);
    free(buffer);

    return 0;
}

这段代码打开物理磁盘设备，并使用DeviceIoControl函数发送IOCTL_DISK_GET_DRIVE_LAYOUT_EX控制码来获取分区表数据。然后，它解析分区表数据并将其打印到控制台上。请注意，这需要管理员权限才能运行。