Read MBR via ReadFile function

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 1 // ReadMBR.cpp : Defines the entry point for the console application.
 2 //
 3 
 4 #include "stdafx.h"
 5 const UINT uSectorSize=512; //扇区大小(byte)
 6 const UINT uBegSector=0;//扇区编号
 7 const UINT uSectorNum=1;//扇区数量
 8 const UINT uReadSize=uSectorNum*uSectorSize;//读取数据大小
 9 BYTE bBuffer[uReadSize]={0};
10 BYTE rBuffer[uReadSize]={0};
11 const char drive[]="\\\\.\\PHYSICALDRIVE0";
12 
13 void ShowByteInform(PBYTE,UINT);
14 int main(int argc, char* argv[])
15 {
16     WNDCLASS wc;
17 
18     HANDLE hDeviceHandle;
19     HICON mIcon;
20     mIcon=LoadIcon(NULL,IDI_WARNING);
21         wc.hIcon=mIcon;
22     hDeviceHandle=CreateFile(drive,GENERIC_WRITE|GENERIC_READ,FILE_SHARE_READ|FILE_SHARE_WRITE,NULL,OPEN_EXISTING,0,0);
23     if(hDeviceHandle==INVALID_HANDLE_VALUE)
24     {
25         printf("open disk error!!\n");
26         return 0;
27     }
28     
29     SetFilePointer(hDeviceHandle,uBegSector*uSectorSize,0,FILE_BEGIN);
30     DWORD dwReadByte;
31     if(ReadFile(hDeviceHandle,(LPVOID)bBuffer,uReadSize,&dwReadByte,NULL)==0)
32     {
33         printf("Read Error!\n");
34         DWORD dw=GetLastError();
35     }//读入bBuffer
36     else
37         bBuffer[446]==0x80?bBuffer[446]=0x00:bBuffer[446]=0x80;
38     SetFilePointer(hDeviceHandle,uBegSector*uSectorSize,0,FILE_BEGIN);
39     if(WriteFile(hDeviceHandle,(LPVOID)bBuffer,uReadSize,&dwReadByte,NULL))
40     {
41         printf("Write disk Succeed!\n");
42     }else
43     {
44         printf("Write disk failed heihei!\n");
45     }
46 
47     if(dwReadByte==0)
48     {
49         printf("open disk 0 error!!\n");
50     }
51     FILE *fp;
52     if((fp=fopen("C:\\BOOT.dat","wb"))!=NULL)
53     fwrite(bBuffer,sizeof(BYTE),sizeof(bBuffer),fp);
54     else
55         printf("create file failed!\n");
56     fclose(fp);
57     if((fp=fopen("C:\\BOOT.dat","rb"))!=NULL)
58         fread(rBuffer,1,sizeof(rBuffer),fp);
59     fclose(fp);
60     
61     ShowByteInform(bBuffer,uReadSize);
62     getchar();
63     return 0;
64 }
65 void ShowByteInform(PBYTE pBuf,UINT uSize)
66 {
67     for(UINT i=1;i<=uSize;i++)
68     {
69         printf("%02X",pBuf[i-1]);
70         if(i%16==0)
71             putchar('\n');
72         else if(i%8==0)
73             printf(" ");
74     }
75 }