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| unit frmMain_;
interface
uses Windows, Messages, SysUtils, Variants, Classes, Graphics, Controls, Forms,
Dialogs, StdCtrls, ComCtrls, ImgList, ToolWin, ExtCtrls, CheckLst, Menus,
ActiveX, Buttons
, VBto_Converter, Math, FileCtrl;
type
TfrmMain = class(TForm)
Label1: TLabel;
lvUndelete: TListView;
txtRecoverDirectory: TEdit;
Button1: TButton;
Label2: TLabel;
Label3: TLabel;
DriveComboBox1: TDriveComboBox;
ProgressBar1: TProgressBar;
function RecoverDeletedFile(hVolume: Longint; lpMFT: Longint; Index: Longint; strDestination: AnsiString): Boolean;
function FindDeleted(hVolume: Longint; lpMFT: Longint { ; m: MFT } ): Boolean;
function OpenDisk(strDisk: AnsiString; hVolume: Longint { ; m: MFT } ; lpMFT: Longint): Variant;
function CloseDisk(hVolume: Longint; lpMFT: Longint): Variant;
procedure cmdUndelete_Click();
procedure drvDisk_Change();
procedure FormShow(Sender: TObject);
procedure Form_Unload(var Cancel: Smallint);
procedure FormCloseQuery(Sender: TObject; var CanClose: Boolean);
procedure lvUndeleteColumnClick(Sender: TObject; Column: TListColumn);
private
{ Private declarations }
public
{ Public declarations }
end;
var
frmMain: TfrmMain;
implementation
{$R *.dfm}
//=========================================================
// Longint CreateFile /* CreateFileA */ (lpFileName: AnsiString, dwDesiredAccess: Longint, dwShareMode: Longint, lpSecurityAttributes: Longint, dwCreationDisposition: Longint, dwFlagsAndAttributes: Longint, hTemplateFile: Longint); // "kernel32.dll"
// Longint CloseHandle(hObject: Longint); // "kernel32.dll"
// Longint WriteFile(hFile: Longint, var lpBuffer: void*, nNumberOfBytesToWrite: Longint, var lpNumberOfBytesWritten: Longint, lpOverlapped: Longint); // "kernel32.dll"
const CREATE_ALWAYS = 2;
GENERIC_READ = $80000000;
GENERIC_WRITE = $40000000;
FILE_SHARE_READ = $1;
FILE_SHARE_WRITE = $2;
FILE_ATTRIBUTE_NORMAL = $80;
var
hVolume, lpMFT: Longint;
m: MFT;
t: array[0..1024+1] of EXTENT;
function TfrmMain.RecoverDeletedFile(hVolume: Longint; lpMFT: Longint; Index: Longint; strDestination: AnsiString): Boolean;
var
lpFile, lpData, hFile, ret: Longint;
File: FILE_RECORD;
ra: RECORD_ATTRIBUTE;
raData: RESIDENT_ATTRIBUTE;
nraData: NONRESIDENT_ATTRIBUTE;
t: PChar;
cnt, lcn: ULONGLONG;
begin
//{$DEFINE def_RecoverDeletedFile}
{$IF Defined(def_RecoverDeletedFile)}
// lit le file record du fichier à récupérer
lpFile := GetFileRecordFromBuffer(lpMFT, Index);
if lpFile=0 then begin CloseHandle(hFile); Exit; end;
CopyMemory(File, lpFile, sizeof(File));
// récupère son attribut DATA
lpData := GetFileRecordAttribute(lpMFT, Index, $80);
if lpData=0 then begin CloseHandle(hFile); Exit; end;
CopyMemory(ra, lpData, sizeof(ra));
// crée le fichier de récupération
hFile := CreateFile(strDestination, GENERIC_WRITE, FILE_SHARE_READ, 0, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
// si les données sont en dehors de la MFT
if ra.NonResident then begin
// on lit l'attribut en non résident
CopyMemory(nraData, lpData, sizeof(nraData));
// on alloue de l'espace pour le fichier
SetLength(t, nraData.AllocatedSize.Low-1+1);
// on lit le contenu du fichier
cnt.Low := nraData.AllocatedSize.Low;
cnt.High := nraData.AllocatedSize.High;
ReadVCN(hVolume, lpData, nraData.LowVCN, cnt, VarPtr(t[0]));
// on écrit dans le fichier
WriteFile(hFile, VarPtr(t[0]), nraData.DataSize.Low, ret, 0);
// si les données sont dans la MFT
end else begin
// on lit l'attribut en résident
CopyMemory(raData, lpData, sizeof(raData));
// on alloue de l'espace pour le fichier
SetLength(t, raData.ValueLength-1+1);
// on lit le contenu du fichier
CopyMemory(t[0], lpData+raData.ValueOffset, raData.ValueLength);
// on écrit dans le fichier
WriteFile(hFile, VarPtr(t[0]), raData.ValueLength, ret, 0);
end;
// on ferme le fichier
CloseHandle(hFile);
Result := true;
{$IFEND} // def_RecoverDeletedFile
end;
function TfrmMain.FindDeleted(hVolume: Longint; lpMFT: Longint { ; m: MFT } ): Boolean;
var
runcnt, x, lpData, lpFile, lpShortFileName, lpLongFileName, lpFileName: Longint;
Data: NONRESIDENT_ATTRIBUTE;
File: FILE_RECORD;
FileName: FILENAME_ATTRIBUTE;
strFileName, strPath: AnsiString;
ra: RESIDENT_ATTRIBUTE;
LI: TListItem;
begin
//{$DEFINE def_FindDeleted}
{$IF Defined(def_FindDeleted)}
lvUndelete.Items.Clear();
if m.NumberOfRecord=0 then Exit;
// pour chaque entrée
pbSearch.Max := m.NumberOfRecord;
pbSearch.Min := 16; // on passe les fichiers systèmes
for x:=16 to m.NumberOfRecord-1 do begin
// on demande le nombre de runs
runcnt := GetFileRecordRunsCount(lpMFT, x);
// s'il y en a, on a une chance de récupération
if runcnt>=0 then begin
// on peut lire l'entête de l'entrée
lpFile := GetFileRecordFromBuffer(lpMFT, x);
// si on peut lire
if lpFile<>0 then begin
CopyMemory(File, lpFile, sizeof(File));
// on cherche l'attribut DATA
lpData := GetFileRecordAttribute(lpMFT, x, $80);
// s'il y en a un, on a une chance de récupération
if lpData then begin
// on copie en tant qu'attribut non résident
CopyMemory(Data, lpData, sizeof(Data));
// si l'entrée n'est pas utilisée
if (CLng(File.Flags) and 1)=0 then begin
// on cherche le nom du fichier
GetFileName(lpMFT, x, lpLongFileName, lpShortFileName);
// court ou long...
if lpLongFileName=0 then lpFileName := lpShortFileName; end else begin lpFileName := lpLongFileName;
// si le fichier a un nom
if lpFileName then begin
// on copie ce nom
CopyMemory(FileName, lpFileName, LenB(FileName));
strFileName := StringOfChar(' ', FileName.NameLength);
CopyMemory(StrPtr(strFileName), lpFileName+LenB(FileName)-2, FileName.NameLength*2);
// on cherche son chemin
strPath := StringOfChar(#0[1], 256);
GetFilePath(lpMFT, x, strPath, 512);
strPath := Copy(strPath, 1, Pos(#0, strPath)-1);
// on ajoute à la liste
LI := lvUndelete.Items.Insert(-1) {? 'I'+IntToStr(x), strPath };
LI.Tag := strFileName;
LI.ListSubItems.Add(, , FormatVB(Data.DataSize.Low/1024,'0.##')+' Ko');
if Data.CompressionUnit then begin
LI.ListSubItems.Add(, , FormatVB(Data.CompressedSize.Low/1024,'0.##')+' Ko');
end else begin
LI.ListSubItems.Add(, , '-');
end;
LI.ListSubItems.Add(, , FormatVB(Data.AllocatedSize.Low/1024,'0.##')+' Ko');
end;
end;
end;
end;
end;
pbSearch.Position := x;
end;
Result := true;
{$IFEND} // def_FindDeleted
end;
// ouvre le disque spécifié
function TfrmMain.OpenDisk(strDisk: AnsiString; hVolume: Longint { ; m: MFT } ; lpMFT: Longint): Variant;
begin
//{$DEFINE def_OpenDisk}
{$IF Defined(def_OpenDisk)}
hVolume := OpenVolume('\\.\'+strDisk);
GetMFTInfo(hVolume, m);
m.Clusters.Extents := VarPtr(t[0]);
GetMFTInfo(hVolume, m);
lpMFT := MapMFT(hVolume, m);
{$IFEND} // def_OpenDisk
end;
// ferme le disque
function TfrmMain.CloseDisk(hVolume: Longint; lpMFT: Longint): Variant;
begin
//{$DEFINE def_CloseDisk}
{$IF Defined(def_CloseDisk)}
UnmapMFT(lpMFT);
CloseVolume(hVolume);
{$IFEND} // def_CloseDisk
end;
procedure TfrmMain.cmdUndelete_Click();
var
LI: TListItem;
x: Longint;
begin
//{$DEFINE def_cmdUndelete_Click}
{$IF Defined(def_cmdUndelete_Click)}
if Dir(txtRecoverDirectory.Text)='' then begin Application.MessageBox(PChar('Dossier inexistant !'), '', MB_ICONSTOP); Exit; end;
For Each LI In lvUndelete.Items
if LI.Checked then begin
x := Round(CLng(Copy(LI.Key, 2, Length(LI.Key)-2+1)));
RecoverDeletedFile(hVolume, lpMFT, x, txtRecoverDirectory.Text+'r_'+mStr(LI.Tag));
end;
End;
{$IFEND} // def_cmdUndelete_Click
end;
procedure TfrmMain.drvDisk_Change();
var
ret: Longint;
begin
//{$DEFINE def_drvDisk_Change}
{$IF Defined(def_drvDisk_Change)}
CloseDisk(hVolume, lpMFT);
hVolume := 0;
lpMFT := 0;
ret := OpenDisk(Copy(drvDisk.Drive, 1, 2), hVolume, m, lpMFT);
FindDeleted(hVolume, lpMFT, m);
{$IFEND} // def_drvDisk_Change
end;
procedure TfrmMain.FormShow(Sender: TObject);
begin
//{$DEFINE def_Form_Load}
{$IF Defined(def_Form_Load)}
drvDisk_Change();
{$IFEND} // def_Form_Load
end;
procedure TfrmMain.Form_Unload(var Cancel: Smallint);
begin
//{$DEFINE def_Form_Unload}
{$IF Defined(def_Form_Unload)}
CloseDisk(hVolume, lpMFT);
{$IFEND} // def_Form_Unload
end;
procedure TfrmMain.FormCloseQuery(Sender: TObject; var CanClose: Boolean);
var
Cancel: Smallint;
begin
Cancel := 0;
Form_Unload(Cancel);
If Cancel<>0 Then CanClose := false;
end;
procedure TfrmMain.lvUndeleteColumnClick(Sender: TObject; Column: TListColumn);
begin
//{$DEFINE def_lvUndelete_ColumnClick}
{$IF Defined(def_lvUndelete_ColumnClick)}
lvUndelete.SortKey := ColumnHeader.Index-1;
lvUndelete.SortType := IIF(true, stText, stNone);
{$IFEND} // def_lvUndelete_ColumnClick
end; |
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