c++ - 我无法读取 mft 并将 VB.net 转换为 C

Question

我尝试将VB.NET源代码转换为C。其目的是显示我的硬盘是否为NTFS。

据说读取MFT并可以比较第三个字节，如果是十进制78(N)和84(T)等等...返回0表示“true”，但我不能这样做；我的代码不起作用。

如何修复它？

VB.net:

Public Function IsNFTSDrive(ByVal strDrive As String) As Boolean
    Dim Hnd As Integer, nRead As Integer
    Dim ret As UInt32
    Dim Buffer(1024) As Byte
    Hnd = CreateFile("\\.\" & Mid(strDrive, 1, 2), GENERIC_READ Or GENERIC_WRITE, FILE_SHARE_READ Or FILE_SHARE_WRITE, _
    Nothing, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL Or FILE_FLAG_OVERLAPPED, IntPtr.Zero)
    If (Hnd <> INVALID_HANDLE_VALUE) Then
        ret = ReadFile(Hnd, Buffer, 1024, nRead, New System.Threading.NativeOverlapped)
    Else
        Return False
    End If
    If ret = 0 Then
        ret = WaitForSingleObject(Hnd, INFINITE)
        Select Case ret
            Case WAIT_OBJECT_0
            Case WAIT_TIMEOUT
        End Select
    Else
        Return False
    End If
    CloseHandle(Hnd)
    Return Buffer(3) = 78 And Buffer(4) = 84 And Buffer(5) = 70 And Buffer(6) = 83
End Function

C:

#include <Windows.h>
#include <winioctl.h>
#include <stdio.h>
#include <stdlib.h>


#define zwpath L"\\\\.\\PhysicalDrive0"

int main(int argc, char *argv[]){

    HANDLE hDevice;
    OVERLAPPED overlapped;
    BYTE buff[1024];
    DWORD numerobyte = 0;
    UINT32 ret;
    ZeroMemory(&overlapped, sizeof(OVERLAPPED));

    hDevice = CreateFileW(zwpath, GENERIC_READ | GENERIC_WRITE, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING,  FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED, NULL);

    if(hDevice != INVALID_HANDLE_VALUE){

        ret = ReadFile(hDevice, buff, 1024, &numerobyte, &overlapped);

    }else
    {
        return NULL;
    }

    if(ret == 0){

        ret = WaitForSingleObject(hDevice,INFINITE );

        switch (ret)
        {
        case WAIT_OBJECT_0:break;
        case WAIT_TIMEOUT:break;
        default:
            break;
        }
    }
    else
    {
        return NULL;
    }

    CloseHandle(hDevice);

    if(buff[3] == 'N'){

        printf("N");
    }

    getchar();
}

编辑

我改变了代码，但什么也没改变

我尝试使用“\.\C:”，例如 MSDN example ，但什么也没有:(

错误从“if(buff[3] == 'N')”开始，我不知道ReadFile失败还是“if”？

中间用于驱动器..“C:\”或“C:”，如“\.\C:”或“\.\C:\”

Answer 1

如果要检查文件系统类型，请检查 this relevant question建议使用 GetVolumeInformation()。