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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 <wx/msw/wrapwin.h> //includes "windows.h"
#include "i18n.h"
#include "dll_loader.h"
#include <stdexcept>
#include "assert_static.h"
#include "build_info.h"
#include "ShadowCopy\shadow.h"
#include "Loki/ScopeGuard.h"
using shadow::ShadowCopy;
using namespace zen;
namespace
{
bool newerThanXP()
{
OSVERSIONINFO osvi = {};
ZeroMemory(&osvi, sizeof(OSVERSIONINFO));
osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
if (::GetVersionEx(&osvi))
return osvi.dwMajorVersion > 5 ||
(osvi.dwMajorVersion == 5 && osvi.dwMinorVersion > 1) ;
//XP has majorVersion == 5, minorVersion == 1
//Server 2003 has majorVersion == 5, minorVersion == 2
//version overview: http://msdn.microsoft.com/en-us/library/ms724834(VS.85).aspx
return false;
}
bool runningWOW64() //test if process is running under WOW64 (reference http://msdn.microsoft.com/en-us/library/ms684139(VS.85).aspx)
{
//dynamically load windows API function
typedef BOOL (WINAPI *IsWow64ProcessFun)(
HANDLE hProcess,
PBOOL Wow64Process);
static const IsWow64ProcessFun isWow64Process =
util::getDllFun<IsWow64ProcessFun>(L"kernel32.dll", "IsWow64Process");
if (isWow64Process)
{
BOOL isWow64 = FALSE;
if (isWow64Process(::GetCurrentProcess(), &isWow64))
return isWow64 == TRUE;
}
return false;
}
inline
std::wstring getShadowDllName()
{
/*
distinguish a bunch of VSS builds: we use XP and Server 2003 implementations...
VSS version and compatibility overview: http://msdn.microsoft.com/en-us/library/aa384627(VS.85).aspx
*/
assert_static(util::is32BitBuild || util::is64BitBuild);
return newerThanXP() ?
(util::is64BitBuild ?
L"Shadow_Server2003_x64.dll" :
L"Shadow_Server2003_Win32.dll") :
(util::is64BitBuild ?
L"Shadow_XP_x64.dll" :
L"Shadow_XP_Win32.dll");
}
}
//#############################################################################################################
class ShadowCopy::ShadowVolume
{
public:
ShadowVolume(const Zstring& volumeNameFormatted) : //throw(FileError)
backupHandle(0)
{
using namespace shadow;
if (!createShadowCopy)
createShadowCopy = util::getDllFun<CreateShadowCopyFct>(getShadowDllName(), createShadowCopyFctName);
if (!releaseShadowCopy)
releaseShadowCopy = util::getDllFun<ReleaseShadowCopyFct>(getShadowDllName(), releaseShadowCopyFctName);
//check if shadow copy dll was loaded correctly
if (createShadowCopy == NULL ||
releaseShadowCopy == NULL)
throw FileError(_("Error starting Volume Shadow Copy Service!") + "\n" +
_("Could not load a required DLL:") + " \"" + getShadowDllName() + "\"");
//VSS does not support running under WOW64 except for Windows XP and Windows Server 2003
//(Reference: http://msdn.microsoft.com/en-us/library/aa384627(VS.85).aspx)
static const bool wow64Active = runningWOW64();
if (wow64Active)
throw FileError(_("Error starting Volume Shadow Copy Service!") + "\n" +
_("Making shadow copies on WOW64 is not supported. Please use FreeFileSync 64-bit version."));
//---------------------------------------------------------------------------------------------------------
//start shadow volume copy service:
wchar_t shadowVolName[1000];
wchar_t errorMessage[1000];
if (!createShadowCopy(
volumeNameFormatted.c_str(),
shadowVolName,
1000,
&backupHandle,
errorMessage,
1000))
throw FileError(_("Error starting Volume Shadow Copy Service!") + "\n" +
"(" + errorMessage + " Volume: \"" + volumeNameFormatted + "\")");
shadowVol = Zstring(shadowVolName) + FILE_NAME_SEPARATOR; //shadowVolName NEVER has a trailing backslash
}
~ShadowVolume()
{
releaseShadowCopy(backupHandle); //fast! no performance optimization necessary
}
Zstring getShadowVolume() const //trailing path separator
{
return shadowVol;
}
private:
ShadowVolume(const ShadowVolume&);
ShadowVolume& operator=(const ShadowVolume&);
static shadow::CreateShadowCopyFct createShadowCopy;
static shadow::ReleaseShadowCopyFct releaseShadowCopy;
Zstring shadowVol;
ShadowHandle backupHandle;
};
shadow::CreateShadowCopyFct ShadowCopy::ShadowVolume::createShadowCopy;
shadow::ReleaseShadowCopyFct ShadowCopy::ShadowVolume::releaseShadowCopy;
//#############################################################################################################
Zstring ShadowCopy::makeShadowCopy(const Zstring& inputFile)
{
using namespace zen;
wchar_t volumeNameRaw[1000];
if (!::GetVolumePathName(inputFile.c_str(), //__in LPCTSTR lpszFileName,
volumeNameRaw, //__out LPTSTR lpszVolumePathName,
1000)) //__in DWORD cchBufferLength
throw FileError(_("Could not determine volume name for file:") + "\n\"" + inputFile + "\"");
Zstring volumeNameFormatted = volumeNameRaw;
if (!volumeNameFormatted.EndsWith(FILE_NAME_SEPARATOR))
volumeNameFormatted += FILE_NAME_SEPARATOR;
//input file is always absolute! directory formatting takes care of this! Therefore volume name can always be found.
const size_t pos = inputFile.find(volumeNameFormatted); //inputFile needs NOT to begin with volumeNameFormatted: consider for example \\?\ prefix!
if (pos == Zstring::npos)
{
std::wstring msg = _("Volume name %x not part of filename %y!");
replace(msg, L"%x", std::wstring(L"\"") + volumeNameFormatted + "\"", false);
replace(msg, L"%y", std::wstring(L"\"") + inputFile + "\"", false);
throw FileError(msg);
}
//get or create instance of shadow volume
VolNameShadowMap::const_iterator iter = shadowVol.find(volumeNameFormatted);
if (iter == shadowVol.end())
{
std::shared_ptr<ShadowVolume> newEntry(new ShadowVolume(volumeNameFormatted));
iter = shadowVol.insert(std::make_pair(volumeNameFormatted, newEntry)).first;
}
//return filename alias on shadow copy volume
return iter->second->getShadowVolume() + Zstring(inputFile.c_str() + pos + volumeNameFormatted.length());
}
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