void CReadSectorDlg::OnReadButton()
{
UpdateData (TRUE) ;
CFile m_Sector_file ;
char * buffer ;
if ( m_FileName_str == "")
{
MessageBox ("Please enter a file to which the read sector contents are to be stored !!");
return ;
}
m_Sector_file.Open (m_FileName_str, CFile::modeCreate | CFile::modeWrite , NULL ) ;
buffer = (char*) malloc (512 * m_NumSec_int) ;
buffer = ReadSectors (m_Head_int, m_Track_int, m_Sector_int, m_NumSec_int);
if ( buffer == NULL )
{
MessageBox ("Operation Failed -- !!");
return ;
}
m_Sector_file.Write (buffer, 512*m_NumSec_int) ;
m_Sector_file.Close ();
MessageBox ("Operation Complete !","ReadSectors", MB_ICONINFORMATION );
}
char * CReadSectorDlg::ReadSectors(int head, int track, int sector, int numsec)
{
// getting logical sector from absolut head/track/sector ...
int LogicalSector = (sector-1) + (head*SECTORSPERTRACK) + (track*SECTORSPERTRACK*NUMOFHEADS) ;
typedef struct _DIOC_REGISTERS {
DWORD reg_EBX;
DWORD reg_EDX;
DWORD reg_ECX;
DWORD reg_EAX;
DWORD reg_EDI;
DWORD reg_ESI;
DWORD reg_Flags;
} DIOC_REGISTERS ;
// char *buffer , errah[10], erral[10] ;
char *buffer ;
HANDLE hDevice ;
DIOC_REGISTERS reg ;
BOOL fResult ;
DWORD cb ;
// Creating handle to vwin32.vxd ...win 95 / 98 !
hDevice = CreateFile ( "\\\\.\\vwin32", 0, 0, NULL, 0, FILE_FLAG_DELETE_ON_CLOSE, NULL );
if ( hDevice == INVALID_HANDLE_VALUE )
{
//MessageBox ( "Error doing CreateFile () !" ) ;
/*
...this means that a handle to vwin32.vxd was not able to be opened ...
....so the operating system is not win 95/98 ...but NT , win2k ...or what (?) ..
.....reading sectors is more easy now .....
*/
HANDLE hDevice;
char* buffer = (char*)malloc (512*numsec);
strset ( buffer , ‘ ‘);
DWORD bytesread ;
// Creating a handle to drive a: using CreateFile () function ..
hDevice = CreateFile("\\\\.\\c:",
GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE,
NULL, OPEN_EXISTING, 0, NULL);
if (hDevice == INVALID_HANDLE_VALUE)
{
MessageBox ("Failed !");
return NULL;
}
// Setting the pointer to point to the start of the sector we want to read ..
SetFilePointer (hDevice, (LogicalSector*512), NULL, FILE_BEGIN);
if (!ReadFile (hDevice, buffer, 512*numsec, &bytesread, NULL) )
{
/*
int err;
char error[10];
err=GetLastError ();
itoa (err, error, 10);
MessageBox (error, "Reading sectors ...Failed ");
*/
return NULL ;
}
CloseHandle(hDevice);
return buffer ;
}
http://download.csdn.net/detail/mao0514/7825687