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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) ZenJu (zhnmju123 AT gmx DOT de) - All Rights Reserved *
// **************************************************************************
#include "recycler.h"
#include <stdexcept>
#include <iterator>
#include <zen/file_handling.h>
#ifdef FFS_WIN
#include <algorithm>
#include <functional>
#include <vector>
#include <boost/thread/once.hpp>
#include <zen/dll.h>
#include <zen/win.h> //includes "windows.h"
#include <zen/assert_static.h>
#include <zen/win_ver.h>
#include <zen/long_path_prefix.h>
#include "IFileOperation/file_op.h"
#elif defined FFS_LINUX
#include <sys/stat.h>
#include <giomm/file.h>
#endif
using namespace zen;
namespace
{
#ifdef FFS_WIN
/*
Performance test: delete 1000 files
------------------------------------
SHFileOperation - single file 33s
SHFileOperation - multiple files 2,1s
IFileOperation - single file 33s
IFileOperation - multiple files 2,1s
=> SHFileOperation and IFileOperation have nearly IDENTICAL performance characteristics!
Nevertheless, let's use IFileOperation for better error reporting!
*/
void moveToWindowsRecycler(const std::vector<Zstring>& filesToDelete) //throw FileError
{
if (filesToDelete.empty())
return;
static bool useIFileOperation = false;
static boost::once_flag once = BOOST_ONCE_INIT; //caveat: function scope static initialization is not thread-safe in VS 2010!
boost::call_once(once, []() { useIFileOperation = vistaOrLater(); });
if (useIFileOperation) //new recycle bin usage: available since Vista
{
std::vector<const wchar_t*> fileNames;
std::transform(filesToDelete.begin(), filesToDelete.end(),
std::back_inserter(fileNames), std::mem_fun_ref(&Zstring::c_str));
using namespace fileop;
const DllFun<MoveToRecycleBinFct> moveToRecycler(getDllName(), moveToRecycleBinFctName);
const DllFun<GetLastErrorFct> getLastError (getDllName(), getLastErrorFctName);
if (!moveToRecycler || !getLastError)
throw FileError(_("Error moving to Recycle Bin:") + L"\n\"" + fileNames[0] + L"\"" + //report first file only... better than nothing
L"\n\n" + _("Could not load a required DLL:") + L" \"" + getDllName() + L"\"");
//#warning moving long file paths to recycler does not work! clarify!
// std::vector<Zstring> temp;
// std::transform(filesToDelete.begin(), filesToDelete.end(),
// std::back_inserter(temp), std::ptr_fun(zen::removeLongPathPrefix)); //::IFileOperation() can't handle \\?\-prefix!
if (!moveToRecycler(&fileNames[0], //array must not be empty
fileNames.size()))
{
wchar_t errorMessage[2000];
getLastError(errorMessage, 2000);
throw FileError(_("Error moving to Recycle Bin:") + L"\n\"" + fileNames[0] + L"\"" + //report first file only... better than nothing
L"\n\n" + L"(" + errorMessage + L")");
}
}
else //regular recycle bin usage: available since XP
{
Zstring filenameDoubleNull;
for (std::vector<Zstring>::const_iterator i = filesToDelete.begin(); i != filesToDelete.end(); ++i)
{
//#warning moving long file paths to recycler does not work! clarify!
//filenameDoubleNull += removeLongPathPrefix(*i); //::SHFileOperation() can't handle \\?\-prefix!
//You should use fully-qualified path names with this function. Using it with relative path names is not thread safe.
filenameDoubleNull += *i; //::SHFileOperation() can't handle \\?\-prefix!
filenameDoubleNull += L'\0';
}
SHFILEOPSTRUCT fileOp = {};
fileOp.hwnd = NULL;
fileOp.wFunc = FO_DELETE;
fileOp.pFrom = filenameDoubleNull.c_str();
fileOp.pTo = NULL;
fileOp.fFlags = FOF_ALLOWUNDO | FOF_NOCONFIRMATION | FOF_SILENT | FOF_NOERRORUI;
fileOp.fAnyOperationsAborted = false;
fileOp.hNameMappings = NULL;
fileOp.lpszProgressTitle = NULL;
if (::SHFileOperation(&fileOp) != 0 || fileOp.fAnyOperationsAborted)
{
throw FileError(_("Error moving to Recycle Bin:") + L"\n\"" + filenameDoubleNull + L"\""); //report first file only... better than nothing
}
}
}
#endif
}
bool zen::moveToRecycleBin(const Zstring& filename) //throw FileError
{
if (!somethingExists(filename))
return false; //neither file nor any other object with that name existing: no error situation, manual deletion relies on it!
#ifdef FFS_WIN
//::SetFileAttributes(applyLongPathPrefix(filename).c_str(), FILE_ATTRIBUTE_NORMAL);
//both SHFileOperation and IFileOperation are not able to delete a folder named "System Volume Information" with normal attributes but shamelessly report success
std::vector<Zstring> fileNames;
fileNames.push_back(filename);
::moveToWindowsRecycler(fileNames); //throw FileError
#elif defined FFS_LINUX
Glib::RefPtr<Gio::File> fileObj = Gio::File::create_for_path(filename.c_str()); //never fails
try
{
if (!fileObj->trash())
throw FileError(_("Error moving to Recycle Bin:") + L"\n\"" + filename + L"\"" +
L"\n\n" + L"(unknown error)");
}
catch (const Glib::Error& errorObj)
{
//implement same behavior as in Windows: if recycler is not existing, delete permanently
if (errorObj.code() == G_IO_ERROR_NOT_SUPPORTED)
{
struct stat fileInfo = {};
if (::lstat(filename.c_str(), &fileInfo) != 0)
return false;
if (S_ISLNK(fileInfo.st_mode) || S_ISREG(fileInfo.st_mode))
removeFile(filename); //throw FileError
else if (S_ISDIR(fileInfo.st_mode))
removeDirectory(filename); //throw FileError
return true;
}
//assemble error message
const std::wstring errorMessage = L"Glib Error Code " + toString<std::wstring>(errorObj.code()) + /* L", " +
g_quark_to_string(errorObj.domain()) + */ L": " + utf8CvrtTo<std::wstring>(errorObj.what());
throw FileError(_("Error moving to Recycle Bin:") + L"\n\"" + filename + L"\"" +
L"\n\n" + L"(" + errorMessage + L")");
}
#endif
return true;
}
#ifdef FFS_WIN
zen::StatusRecycler zen::recycleBinStatus(const Zstring& pathName)
{
std::vector<wchar_t> buffer(MAX_PATH + 1);
if (::GetVolumePathName(applyLongPathPrefix(pathName).c_str(), //__in LPCTSTR lpszFileName,
&buffer[0], //__out LPTSTR lpszVolumePathName,
static_cast<DWORD>(buffer.size()))) //__in DWORD cchBufferLength
{
Zstring rootPath = &buffer[0];
if (!endsWith(rootPath, FILE_NAME_SEPARATOR)) //a trailing backslash is required
rootPath += FILE_NAME_SEPARATOR;
SHQUERYRBINFO recInfo = {};
recInfo.cbSize = sizeof(recInfo);
HRESULT rv = ::SHQueryRecycleBin(rootPath.c_str(), //__in_opt LPCTSTR pszRootPath,
&recInfo); //__inout LPSHQUERYRBINFO pSHQueryRBInfo
return rv == S_OK ? STATUS_REC_EXISTS : STATUS_REC_MISSING;
}
return STATUS_REC_UNKNOWN;
}
#elif defined FFS_LINUX
/*
We really need access to a similar function to check whether a directory supports trashing and emit a warning if it does not!
The following function looks perfect, alas it is restricted to local files and to the implementation of GIO only:
gboolean _g_local_file_has_trash_dir(const char* dirname, dev_t dir_dev);
See: http://www.netmite.com/android/mydroid/2.0/external/bluetooth/glib/gio/glocalfileinfo.h
Just checking for "G_FILE_ATTRIBUTE_ACCESS_CAN_TRASH" is not correct, since we find in
http://www.netmite.com/android/mydroid/2.0/external/bluetooth/glib/gio/glocalfileinfo.c
g_file_info_set_attribute_boolean (info, G_FILE_ATTRIBUTE_ACCESS_CAN_TRASH,
writable && parent_info->has_trash_dir);
=> We're NOT interested in whether the specified folder can be trashed, but whether it supports thrashing its child elements! (Only support, not actual write access!)
This renders G_FILE_ATTRIBUTE_ACCESS_CAN_TRASH useless for this purpose.
*/
#endif
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