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// **************************************************************************
// * This file is part of the FreeFileSync project. It is distributed under *
// * GNU General Public License: http://www.gnu.org/licenses/gpl.html *
// * Copyright (C) 2008-2011 ZenJu (zhnmju123 AT gmx.de) *
// **************************************************************************
#include "shadow.h"
#include <algorithm>
#include <string>
#include <comdef.h>
#include <zen/com_ptr.h>
#include <zen/com_error.h>
#define WIN32_LEAN_AND_MEAN
#include "windows.h"
#ifdef USE_SHADOW_XP
#include "xp/inc/vss.h"
#include "xp/inc/vswriter.h"
#include "xp/inc/vsbackup.h"
#elif defined USE_SHADOW_2003
#include "Server 2003/inc/vss.h"
#include "Server 2003/inc/vswriter.h"
#include "Server 2003/inc/vsbackup.h"
#else
adapt!
#endif
using namespace zen;
namespace
{
inline
void copyString(const std::wstring& input, wchar_t* buffer, size_t bufferSize)
{
if (bufferSize > 0)
{
//size_t endPos = input.copy(buffer, bufferSize - 1);
//buffer[endPos] = 0;
const size_t maxSize = std::min(input.length(), bufferSize - 1);
std::copy(input.begin(), input.begin() + maxSize, buffer);
buffer[maxSize] = 0;
}
}
inline
void writeErrorMsg(const wchar_t* input, HRESULT hr, wchar_t* output, unsigned int outputLen)
{
copyString(generateErrorMsg(input, hr), output, outputLen);
}
}
bool shadow::createShadowCopy(const wchar_t* volumeName,
wchar_t* shadowVolName,
unsigned int shadowBufferLen,
ShadowHandle* handle,
wchar_t* errorMessage,
unsigned int errorBufferLen)
{
//MessageBox(0, L"backup err", L"", 0); */
*handle = 0;
HRESULT hr = NULL;
ComPtr<IVssBackupComponents> backupComp;
if (FAILED(hr = CreateVssBackupComponents(backupComp.init())))
{
if (hr == E_ACCESSDENIED)
writeErrorMsg(L"The caller does not have sufficient backup privileges or is not an administrator.", hr, errorMessage, errorBufferLen);
else
writeErrorMsg(L"Error calling \"CreateVssBackupComponents\".", hr, errorMessage, errorBufferLen);
return false;
}
if (FAILED(hr = backupComp->InitializeForBackup()))
{
writeErrorMsg(L"Error calling \"InitializeForBackup\".", hr, errorMessage, errorBufferLen);
return false;
}
if (FAILED(hr = backupComp->SetBackupState(false, false, VSS_BT_FULL)))
{
writeErrorMsg(L"Error calling \"SetBackupState\".", hr, errorMessage, errorBufferLen);
return false;
}
ComPtr<IVssAsync> vssWriters;
if (FAILED(hr = backupComp->GatherWriterMetadata(vssWriters.init())))
{
//this can happen if XP-version of VSS is used on Windows Vista (which needs at least VSS-Server2003 build)
writeErrorMsg(L"Error calling \"GatherWriterMetadata\".", hr, errorMessage, errorBufferLen);
return false;
}
//wait for shadow copy writers to complete
if (FAILED(hr = vssWriters->Wait()))
{
writeErrorMsg(L"Error calling \"vssWriters->Wait\".", hr, errorMessage, errorBufferLen);
return false;
}
vssWriters->QueryStatus(&hr, NULL); //check if the async operation succeeded...
if (FAILED(hr))
{
writeErrorMsg(L"Error calling \"vssWriters->QueryStatus\".", hr, errorMessage, errorBufferLen);
return false;
}
VSS_ID snapshotSetId = {0};
if (FAILED(hr = backupComp->StartSnapshotSet(&snapshotSetId)))
{
writeErrorMsg(L"Error calling \"StartSnapshotSet\".", hr, errorMessage, errorBufferLen);
return false;
}
VSS_ID SnapShotId = {0};
if (FAILED(hr = backupComp->AddToSnapshotSet(const_cast<wchar_t*>(volumeName), GUID_NULL, &SnapShotId)))
{
writeErrorMsg(L"Error calling \"AddToSnapshotSet\".", hr, errorMessage, errorBufferLen);
return false;
}
ComPtr<IVssAsync> vssPrepare;
if (FAILED(hr = backupComp->PrepareForBackup(vssPrepare.init())))
{
writeErrorMsg(L"Error calling \"PrepareForBackup\".", hr, errorMessage, errorBufferLen);
return false;
}
if (FAILED(hr = vssPrepare->Wait()))
{
writeErrorMsg(L"Error calling \"vssPrepare->Wait\".", hr, errorMessage, errorBufferLen);
return false;
}
vssPrepare->QueryStatus(&hr, NULL); //check if the async operation succeeded...
if (FAILED(hr))
{
writeErrorMsg(L"Error calling \"vssPrepare->QueryStatus\".", hr, errorMessage, errorBufferLen);
return false;
}
ComPtr<IVssAsync> vssDoShadowCopy;
if (FAILED(hr = backupComp->DoSnapshotSet(vssDoShadowCopy.init())))
{
writeErrorMsg(L"Error calling \"DoSnapshotSet\".", hr, errorMessage, errorBufferLen);
return false;
}
if (FAILED(hr = vssDoShadowCopy->Wait()))
{
writeErrorMsg(L"Error calling \"vssDoShadowCopy->Wait\".", hr, errorMessage, errorBufferLen);
return false;
}
vssDoShadowCopy->QueryStatus(&hr, NULL); //check if the async operation succeeded...
if (FAILED(hr))
{
writeErrorMsg(L"Error calling \"vssDoShadowCopy->QueryStatus\".", hr, errorMessage, errorBufferLen);
return false;
}
VSS_SNAPSHOT_PROP props;
if (FAILED(hr = backupComp->GetSnapshotProperties(SnapShotId, &props)))
{
writeErrorMsg(L"Error calling \"GetSnapshotProperties\".", hr, errorMessage, errorBufferLen);
return false;
}
//finally: write volume name of newly created shadow copy
copyString(props.m_pwszSnapshotDeviceObject, shadowVolName, shadowBufferLen);
VssFreeSnapshotProperties(&props);
*handle = backupComp.release();
return true;
}
void shadow::releaseShadowCopy(ShadowHandle handle)
{
if (handle)
handle->Release();
}
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