/* The code of interest is in the subroutine GetDriveGeometry. The
code in main shows how to interpret the results of the IOCTL call. */
#include <windows.h>
#include <winioctl.h>
#include <stdio.h>
BOOL
ReadMBR()
{
HANDLE hDevice; // handle to the drive to be examined
BOOL bResult; // results flag
DWORD junk; // discard results
// DISK_GEOMETRY Geometry;
char MBRBuf[512];
hDevice = CreateFile("////.//PHYSICALDRIVE0", // drive to open
GENERIC_READ, // for read
FILE_SHARE_READ | FILE_SHARE_WRITE, // share mode
NULL, // default security attributes
OPEN_EXISTING, // disposition
0, // file attributes
NULL); // don't copy any file's attributes
if (hDevice == INVALID_HANDLE_VALUE) // we can't open the drive
{
MessageBox(NULL,"Open Hard Disk ERROR.",NULL,MB_OK);
return (FALSE);
}
bResult=ReadFile(hDevice,MBRBuf,512,&junk,NULL);
if (bResult==FALSE || junk<512)
{
MessageBox(NULL,"Read MBR ERROR.",NULL,MB_OK);
return FALSE;
}
CloseHandle(hDevice);
for(int i=0;i<512;i++)
{
if(i%16==0)
{
printf("%04X: ",i);
}
printf("%02X ",(unsigned char)MBRBuf);
if(i%16==15)
{
printf("/n");
}
}
return TRUE;
}
BOOL
GetDriveGeometry(DISK_GEOMETRY *pdg)
{
HANDLE hDevice; // handle to the drive to be examined
BOOL bResult; // results flag
DWORD junk; // discard results
hDevice = CreateFile("////.//PHYSICALDRIVE0", // drive to open
0, // don't need any access to the drive
FILE_SHARE_READ | FILE_SHARE_WRITE, // share mode
NULL, // default security attributes
OPEN_EXISTING, // disposition
0, // file attributes
NULL); // don't copy any file's attributes
if (hDevice == INVALID_HANDLE_VALUE) // we can't open the drive
{
return (FALSE);
}
bResult = DeviceIoControl(hDevice, // device we are querying
IOCTL_DISK_GET_DRIVE_GEOMETRY, // operation to perform
NULL, 0, // no input buffer, so pass zero
pdg, sizeof(*pdg), // output buffer
&junk, // discard count of bytes returned
(LPOVERLAPPED) NULL); // synchronous I/O
CloseHandle(hDevice); // we're done with the handle
return (bResult);
}
int
main(int argc, char *argv[])
{
DISK_GEOMETRY pdg; // disk drive geometry structure
BOOL bResult; // generic results flag
ULONGLONG DiskSize; // size of the drive, in bytes
DWORD BytesRead;
#if 0
bResult = GetDriveGeometry (&pdg);
if (bResult)
{
printf("Cylinders = %I64d/n", pdg.Cylinders);
printf("Tracks per cylinder = %ld/n", (ULONG) pdg.TracksPerCylinder);
printf("Sectors per track = %ld/n", (ULONG) pdg.SectorsPerTrack);
printf("Bytes per sector = %ld/n", (ULONG) pdg.BytesPerSector);
DiskSize = pdg.Cylinders.QuadPart * (ULONG)pdg.TracksPerCylinder *
(ULONG)pdg.SectorsPerTrack * (ULONG)pdg.BytesPerSector;
printf("Disk size = %I64d (Bytes) = %12.2f (Mb)/n", DiskSize,
DiskSize / 1024. / 1024.);
} else {
printf ("Attempt to get drive geometry failed. Error %ld./n",
GetLastError ());
}
#endif
printf("/n----------MBR----------/n/n");
ReadMBR();
return ((int)bResult);
}
这个是读分区表的，把ReadFile改成WriteFile应该是写分区表了，我没试过。
