Utils::Fs Namespace Reference

Functions
QString	toNativePath (const QString &path)
QString	toUniformPath (const QString &path)
QString	resolvePath (const QString &relativePath, const QString &basePath)
QString	fileExtension (const QString &filename)
QString	fileName (const QString &filePath)
QString	folderName (const QString &filePath)
qint64	computePathSize (const QString &path)
bool	sameFiles (const QString &path1, const QString &path2)
QString	toValidFileSystemName (const QString &name, bool allowSeparators=false, const QString &pad=QLatin1String(" "))
bool	isValidFileSystemName (const QString &name, bool allowSeparators=false)
qint64	freeDiskSpaceOnPath (const QString &path)
QString	branchPath (const QString &filePath, QString *removed=nullptr)
bool	sameFileNames (const QString &first, const QString &second)
QString	expandPath (const QString &path)
QString	expandPathAbs (const QString &path)
bool	isRegularFile (const QString &path)
bool	smartRemoveEmptyFolderTree (const QString &path)
bool	forceRemove (const QString &filePath)
void	removeDirRecursive (const QString &path)
QString	tempPath ()
QString	findRootFolder (const QStringList &filePaths)
void	stripRootFolder (QStringList &filePaths)
void	addRootFolder (QStringList &filePaths, const QString &name)
bool	isNetworkFileSystem (const QString &path)

Detailed Description

Utility functions related to file system.

Function Documentation

addRootFolder()

void Utils::Fs::addRootFolder	(	QStringList &	filePaths,
		const QString &	name
	)

Definition at line 432 of file fs.cpp.

{
    Q_ASSERT(!rootFolder.isEmpty());
 
    for (QString &filePath : filePaths)
        filePath = rootFolder + QLatin1Char('/') + filePath;
}

Referenced by BitTorrent::applyContentLayout().

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branchPath()

QString Utils::Fs::branchPath	(	const QString &	filePath,
		QString *	removed = nullptr
	)

Definition at line 276 of file fs.cpp.

{
    QString ret = toUniformPath(filePath);
    if (ret.endsWith('/'))
        ret.chop(1);
    const int slashIndex = ret.lastIndexOf('/');
    if (slashIndex >= 0)
    {
        if (removed)
            *removed = ret.mid(slashIndex + 1);
        ret = ret.left(slashIndex);
    }
    return ret;
}

References toUniformPath().

Referenced by FileLogger::deleteOld(), TorrentCreatorDialog::handleCreationSuccess(), TorrentCreatorDialog::onCreateButtonClicked(), BitTorrent::TorrentCreatorThread::run(), and BitTorrent::TorrentImpl::TorrentImpl().

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computePathSize()

qint64 Utils::Fs::computePathSize

(

const QString &

path

)

Returns the size of a file. If the file is a folder, it will compute its size based on its content.

Returns -1 in case of error.

Definition at line 199 of file fs.cpp.

{
    // Check if it is a file
    const QFileInfo fi(path);
    if (!fi.exists()) return -1;
    if (fi.isFile()) return fi.size();
 
    // Compute folder size based on its content
    qint64 size = 0;
    QDirIterator iter(path, QDir::Files | QDir::Hidden | QDir::NoSymLinks, QDirIterator::Subdirectories);
    while (iter.hasNext())
    {
        iter.next();
        size += iter.fileInfo().size();
    }
    return size;
}

expandPath()

QString Utils::Fs::expandPath

(

const QString &

path

)

Definition at line 300 of file fs.cpp.

{
    const QString ret = path.trimmed();
    if (ret.isEmpty())
        return ret;
 
    return QDir::cleanPath(ret);
}

Referenced by expandPathAbs(), and PropertiesWidget::getFullPath().

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expandPathAbs()

QString Utils::Fs::expandPathAbs

(

const QString &

path

)

Definition at line 309 of file fs.cpp.

{
    return QDir(expandPath(path)).absolutePath();
}

References expandPath().

Referenced by TorrentOptionsDialog::accept(), OptionsDialog::askForExportDir(), RSS::AutoDownloader::AutoDownloader(), WebApplication::configure(), Net::GeoIPManager::downloadFinished(), SearchPluginManager::engineLocation(), OptionsDialog::getFinishedTorrentExportDir(), OptionsDialog::getTorrentExportDir(), Net::GeoIPManager::loadDatabase(), CustomStorage::move_storage(), OptionsDialog::saveOptions(), RSS::Session::Session(), TorrentsController::setLocationAction(), and BitTorrent::Session::startUpTorrents().

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fileExtension()

QString Utils::Fs::fileExtension

(

const QString &

filename

)

Returns the file extension part of a file name.

Definition at line 82 of file fs.cpp.

{
    return QMimeDatabase().suffixForFileName(filename);
}

Referenced by AutoExpandableDialog::getText(), Utils::Misc::isPreviewable(), and anonymous_namespace{torrentcontentlayout.cpp}::removeExtension().

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fileName()

QString Utils::Fs::fileName

(

const QString &

filePath

)

Definition at line 87 of file fs.cpp.

{
    const QString path = toUniformPath(filePath);
    const int slashIndex = path.lastIndexOf('/');
    if (slashIndex == -1)
        return path;
    return path.mid(slashIndex + 1);
}

References toUniformPath().

Referenced by BitTorrent::Session::addTorrent_impl(), RSS::AutoDownloader::AutoDownloader(), anonymous_namespace{torrentcreatorthread.cpp}::fileFilter(), BitTorrent::TorrentInfo::fileIndex(), straceWin::getBacktrace(), SearchPluginManager::getPluginVersion(), SearchPluginManager::installPlugin(), SearchPluginManager::pluginDownloadFinished(), PreviewSelectDialog::PreviewSelectDialog(), anonymous_namespace{uithememanager.cpp}::readFile(), anonymous_namespace{torrentcontentlayout.cpp}::removeExtension(), BitTorrent::TorrentCreatorThread::run(), FileSearcher::search(), RSS::Session::Session(), TorrentContentModel::setupModelData(), AsyncFileStorage::store(), AsyncFileStorage::store_impl(), anonymous_namespace{transferlistwidget.cpp}::torrentContainsPreviewableFiles(), TorrentContentModelFile::TorrentContentModelFile(), and BitTorrent::TorrentImpl::TorrentImpl().

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findRootFolder()

QString Utils::Fs::findRootFolder

(

const QStringList &

filePaths

)

Definition at line 403 of file fs.cpp.

{
    QString rootFolder;
    for (const QString &filePath : filePaths)
    {
        const auto filePathElements = QStringView(filePath).split(u'/');
        // if at least one file has no root folder, no common root folder exists
        if (filePathElements.count() <= 1)
            return {};
 
        if (rootFolder.isEmpty())
            rootFolder = filePathElements.at(0).toString();
        else if (rootFolder != filePathElements.at(0))
            return {};
    }
 
    return rootFolder;
}

Referenced by BitTorrent::Session::addTorrent_impl(), BitTorrent::applyContentLayout(), AddNewTorrentDialog::contentLayoutChanged(), BitTorrent::detectContentLayout(), BitTorrent::TorrentInfo::rootFolder(), AddNewTorrentDialog::setupTreeview(), and stripRootFolder().

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folderName()

QString Utils::Fs::folderName

(

const QString &

filePath

)

Definition at line 96 of file fs.cpp.

{
    const QString path = toUniformPath(filePath);
    const int slashIndex = path.lastIndexOf('/');
    if (slashIndex == -1)
        return {};
    return path.left(slashIndex);
}

References toUniformPath().

Referenced by OptionsDialog::on_addWatchedFolderButton_clicked().

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forceRemove()

bool Utils::Fs::forceRemove

(

const QString &

filePath

)

Removes the file with the given filePath.

This function will try to fix the file permissions before removing it.

Definition at line 173 of file fs.cpp.

{
    QFile f(filePath);
    if (!f.exists())
        return true;
    // Make sure we have read/write permissions
    f.setPermissions(f.permissions() | QFile::ReadOwner | QFile::WriteOwner | QFile::ReadUser | QFile::WriteUser);
    // Remove the file
    return f.remove();
}

References f().

Referenced by RSS::Feed::cleanup(), anonymous_namespace{searchpluginmanager.cpp}::clearPythonCache(), FileLogger::deleteOld(), TrackerFiltersList::handleFavicoDownloadFinished(), PluginSelectDialog::iconDownloadFinished(), SearchPluginManager::installPlugin_impl(), SearchPluginManager::pluginDownloadFinished(), TorrentFilesWatcher::Worker::processFailedTorrents(), TorrentFilesWatcher::Worker::processFolder(), anonymous_namespace{settingsstorage.cpp}::TransactionalSettings::read(), BitTorrent::BencodeResumeDataStorage::Worker::remove(), smartRemoveEmptyFolderTree(), BitTorrent::Session::startUpTorrents(), SearchPluginManager::uninstallPlugin(), SearchPluginManager::updateNova(), anonymous_namespace{settingsstorage.cpp}::TransactionalSettings::write(), FileGuard::~FileGuard(), and TrackerFiltersList::~TrackerFiltersList().

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freeDiskSpaceOnPath()

qint64 Utils::Fs::freeDiskSpaceOnPath

(

const QString &

path

)

Definition at line 271 of file fs.cpp.

{
    return QStorageInfo(path).bytesAvailable();
}

Referenced by FreeDiskSpaceChecker::check(), and AddNewTorrentDialog::updateDiskSpaceLabel().

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isNetworkFileSystem()

bool Utils::Fs::isNetworkFileSystem

(

const QString &

path

)

Definition at line 337 of file fs.cpp.

{
#if defined(Q_OS_WIN)
    const std::wstring pathW {path.toStdWString()};
    auto volumePath = std::make_unique<wchar_t[]>(path.length() + 1);
    if (!::GetVolumePathNameW(pathW.c_str(), volumePath.get(), (path.length() + 1)))
        return false;
    return (::GetDriveTypeW(volumePath.get()) == DRIVE_REMOTE);
#else
    QString file = path;
    if (!file.endsWith('/'))
        file += '/';
    file += '.';
 
    struct statfs buf {};
    if (statfs(file.toLocal8Bit().constData(), &buf) != 0)
        return false;
 
#if defined(Q_OS_OPENBSD)
    return ((strncmp(buf.f_fstypename, "cifs", sizeof(buf.f_fstypename)) == 0)
        || (strncmp(buf.f_fstypename, "nfs", sizeof(buf.f_fstypename)) == 0)
        || (strncmp(buf.f_fstypename, "smbfs", sizeof(buf.f_fstypename)) == 0));
#else
    // Magic number reference:
    // https://github.com/coreutils/coreutils/blob/master/src/stat.c
    switch (static_cast<quint32>(buf.f_type))
    {
    case 0x0000517B:  // SMB
    case 0x0000564C:  // NCP
    case 0x00006969:  // NFS
    case 0x00C36400:  // CEPH
    case 0x01161970:  // GFS
    case 0x013111A8:  // IBRIX
    case 0x0BD00BD0:  // LUSTRE
    case 0x19830326:  // FHGFS
    case 0x47504653:  // GPFS
    case 0x50495045:  // PIPEFS
    case 0x5346414F:  // AFS
    case 0x61636673:  // ACFS
    case 0x61756673:  // AUFS
    case 0x65735543:  // FUSECTL
    case 0x65735546:  // FUSEBLK
    case 0x6B414653:  // KAFS
    case 0x6E667364:  // NFSD
    case 0x73757245:  // CODA
    case 0x7461636F:  // OCFS2
    case 0x786F4256:  // VBOXSF
    case 0x794C7630:  // OVERLAYFS
    case 0x7C7C6673:  // PRL_FS
    case 0xA501FCF5:  // VXFS
    case 0xAAD7AAEA:  // OVERLAYFS
    case 0xBACBACBC:  // VMHGFS
    case 0xBEEFDEAD:  // SNFS
    case 0xFE534D42:  // SMB2
    case 0xFF534D42:  // CIFS
        return true;
    default:
        break;
    }
 
    return false;
#endif
#endif
}

References file().

Referenced by TorrentFilesWatcher::Worker::addWatchedFolder(), and TorrentFilesWatcher::Worker::updateWatchedFolder().

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isRegularFile()

bool Utils::Fs::isRegularFile

(

const QString &

path

)

Definition at line 321 of file fs.cpp.

{
    struct ::stat st;
    if (::stat(path.toUtf8().constData(), &st) != 0)
    {
        //  analyse erno and log the error
        const auto err = errno;
        qDebug("Could not get file stats for path '%s'. Error: %s"
               , qUtf8Printable(path), qUtf8Printable(strerror(err)));
        return false;
    }
 
    return (st.st_mode & S_IFMT) == S_IFREG;
}

Referenced by WebApplication::sendWebUIFile().

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isValidFileSystemName()

bool Utils::Fs::isValidFileSystemName	(	const QString &	name,
		bool	allowSeparators = false
	)

Definition at line 248 of file fs.cpp.

{
    if (name.isEmpty()) return false;
 
#if defined(Q_OS_WIN)
    const QRegularExpression regex
    {allowSeparators
        ? QLatin1String("[:?\"*<>|]")
        : QLatin1String("[\\\\/:?\"*<>|]")};
#elif defined(Q_OS_MACOS)
    const QRegularExpression regex
    {allowSeparators
        ? QLatin1String("[\\0:]")
        : QLatin1String("[\\0/:]")};
#else
    const QRegularExpression regex
    {allowSeparators
        ? QLatin1String("[\\0]")
        : QLatin1String("[\\0/]")};
#endif
    return !name.contains(regex);
}

Referenced by BitTorrent::AbstractFileStorage::renameFile(), and BitTorrent::AbstractFileStorage::renameFolder().

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removeDirRecursive()

void Utils::Fs::removeDirRecursive

(

const QString &

path

)

Removes directory and its content recursively.

Definition at line 187 of file fs.cpp.

{
    if (!path.isEmpty())
        QDir(path).removeRecursively();
}

Referenced by Application::cleanup(), and anonymous_namespace{searchpluginmanager.cpp}::clearPythonCache().

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resolvePath()

QString Utils::Fs::resolvePath	(	const QString &	relativePath,
		const QString &	basePath
	)

If path is relative then resolves it againstbasePath, otherwise returns thepath` itself

Definition at line 74 of file fs.cpp.

{
    Q_ASSERT(QDir::isRelativePath(relativePath));
    Q_ASSERT(QDir::isAbsolutePath(basePath));
 
    return (relativePath.isEmpty() ? basePath : QDir(basePath).absoluteFilePath(relativePath));
}

Referenced by BitTorrent::Session::categoryDownloadPath(), TorrentCategoryDialog::categoryNameChanged(), BitTorrent::Session::categorySavePath(), BitTorrent::Session::initLoadTorrentParams(), BitTorrent::Session::setDownloadPath(), BitTorrent::TorrentImpl::setDownloadPath(), BitTorrent::Session::setSavePath(), BitTorrent::TorrentImpl::setSavePath(), and TorrentCategoryDialog::useDownloadPathChanged().

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sameFileNames()

bool Utils::Fs::sameFileNames	(	const QString &	first,
		const QString &	second
	)

Definition at line 291 of file fs.cpp.

{
#if defined(Q_OS_UNIX) || defined(Q_WS_QWS)
    return QString::compare(first, second, Qt::CaseSensitive) == 0;
#else
    return QString::compare(first, second, Qt::CaseInsensitive) == 0;
#endif
}

sameFiles()

bool Utils::Fs::sameFiles	(	const QString &	path1,
		const QString &	path2
	)

Makes deep comparison of two files to make sure they are identical.

Definition at line 220 of file fs.cpp.

{
    QFile f1(path1), f2(path2);
    if (!f1.exists() || !f2.exists()) return false;
    if (f1.size() != f2.size()) return false;
    if (!f1.open(QIODevice::ReadOnly)) return false;
    if (!f2.open(QIODevice::ReadOnly)) return false;
 
    const int readSize = 1024 * 1024;  // 1 MiB
    while (!f1.atEnd() && !f2.atEnd())
    {
        if (f1.read(readSize) != f2.read(readSize))
            return false;
    }
    return true;
}

References f1(), and f2().

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smartRemoveEmptyFolderTree()

bool Utils::Fs::smartRemoveEmptyFolderTree

(

const QString &

path

)

This function will first check if there are only system cache files, e.g. Thumbs.db, .DS_Store and/or only temp files that end with '~', e.g. filename~. If they are the only files it will try to remove them and delete the folder. This action will be performed for each subfolder starting from the deepest folder. There is an inherent race condition here. A file might appear after it is checked that only the above mentioned "useless" files exist but before the whole folder is removed. In this case, the folder will not be removed but the "useless" files will be deleted.

Definition at line 114 of file fs.cpp.

{
    if (path.isEmpty() || !QDir(path).exists())
        return true;
 
    const QStringList deleteFilesList =
    {
        // Windows
        QLatin1String("Thumbs.db"),
        QLatin1String("desktop.ini"),
        // Linux
        QLatin1String(".directory"),
        // Mac OS
        QLatin1String(".DS_Store")
    };
 
    // travel from the deepest folder and remove anything unwanted on the way out.
    QStringList dirList(path + '/');  // get all sub directories paths
    QDirIterator iter(path, (QDir::AllDirs | QDir::NoDotAndDotDot), QDirIterator::Subdirectories);
    while (iter.hasNext())
        dirList << iter.next() + '/';
    // sort descending by directory depth
    std::sort(dirList.begin(), dirList.end()
              , [](const QString &l, const QString &r) { return l.count('/') > r.count('/'); });
 
    for (const QString &p : asConst(dirList))
    {
        const QDir dir(p);
        // A deeper folder may have not been removed in the previous iteration
        // so don't remove anything from this folder either.
        if (!dir.isEmpty(QDir::Dirs | QDir::NoDotAndDotDot))
            continue;
 
        const QStringList tmpFileList = dir.entryList(QDir::Files);
 
        // deleteFilesList contains unwanted files, usually created by the OS
        // temp files on linux usually end with '~', e.g. `filename~`
        const bool hasOtherFiles = std::any_of(tmpFileList.cbegin(), tmpFileList.cend(), [&deleteFilesList](const QString &f)
        {
            return (!f.endsWith('~') && !deleteFilesList.contains(f, Qt::CaseInsensitive));
        });
        if (hasOtherFiles)
            continue;
 
        for (const QString &f : tmpFileList)
            forceRemove(p + f);
 
        // remove directory if empty
        dir.rmdir(p);
    }
 
    return QDir(path).exists();
}

References asConst(), f(), and forceRemove().

Referenced by BitTorrent::Session::handleTorrentDeletedAlert(), and BitTorrent::Session::handleTorrentDeleteFailedAlert().

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stripRootFolder()

void Utils::Fs::stripRootFolder

(

QStringList &

filePaths

)

Definition at line 422 of file fs.cpp.

{
    const QString commonRootFolder = findRootFolder(filePaths);
    if (commonRootFolder.isEmpty())
        return;
 
    for (QString &filePath : filePaths)
        filePath = filePath.mid(commonRootFolder.size() + 1);
}

References findRootFolder().

Referenced by BitTorrent::applyContentLayout().

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tempPath()

QString Utils::Fs::tempPath

(

)

Definition at line 314 of file fs.cpp.

{
    static const QString path = QDir::tempPath() + "/.qBittorrent/";
    QDir().mkdir(path);
    return path;
}

Referenced by Application::cleanup(), BitTorrent::Session::downloadMetadata(), UIThemeManager::getIconPath(), and anonymous_namespace{downloadhandlerimpl.cpp}::saveToTempFile().

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toNativePath()

QString Utils::Fs::toNativePath

(

const QString &

path

)

Converts a path to a string suitable for display. This function makes sure the directory separator used is consistent with the OS being run.

Definition at line 64 of file fs.cpp.

{
    return QDir::toNativeSeparators(path);
}

Referenced by FileSystemPathComboEdit::addItem(), BitTorrent::Session::addMoveTorrentStorageJob(), BitTorrent::Session::addTorrent_impl(), TorrentFilesWatcher::Worker::addWatchedFolder(), BitTorrent::BencodeResumeDataStorage::BencodeResumeDataStorage(), FileSystemPathEdit::FileSystemPathEditPrivate::browseActionTriggered(), BitTorrent::TorrentCreatorThread::calculateTotalPieces(), AddNewTorrentDialog::categoryChanged(), WatchedFoldersModel::data(), TransferListModel::displayValue(), BitTorrent::Session::downloadMetadata(), BitTorrent::TorrentImpl::endReceivedMetadataHandling(), anonymous_namespace{upgrade.cpp}::exportWebUIHttpsFiles(), BitTorrent::Session::fileSearchFinished(), TorrentOptionsDialog::handleCategoryChanged(), TorrentCreatorDialog::handleCreationSuccess(), TorrentOptionsDialog::handleTMMChanged(), BitTorrent::Session::handleTorrentFinished(), FileSystemPathComboEdit::insertItem(), TransferListModel::internalValue(), OptionsDialog::loadOptions(), AddNewTorrentDialog::loadTorrentFile(), BitTorrent::TorrentImpl::moveStorage(), OptionsDialog::on_addWatchedFolderButton_clicked(), WatchedFolderOptionsDialog::onCategoryChanged(), Utils::Gui::openFolderSelect(), Utils::Gui::openPath(), AppController::preferencesAction(), PreviewSelectDialog::previewButtonClicked(), TorrentsController::propertiesAction(), anonymous_namespace{settingsstorage.cpp}::TransactionalSettings::read(), BitTorrent::Session::recursiveTorrentDownload(), BitTorrent::TorrentImpl::renameFile(), BitTorrent::TorrentCreatorThread::run(), Application::runExternalProgram(), SearchDownloadHandler::SearchDownloadHandler(), SearchHandler::SearchHandler(), serialize(), TorrentsController::setLocationAction(), FileSystemPathEdit::setSelectedPath(), SearchPluginManager::update(), TorrentCreatorDialog::updateInputPath(), AutomatedRssDownloader::updateRuleDefinitionBox(), and PropertiesWidget::updateSavePath().

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toUniformPath()

QString Utils::Fs::toUniformPath

(

const QString &

path

)

Converts a path to a string suitable for processing. This function makes sure the directory separator used is independent from the OS being run so it is the same on all supported platforms. Slash ('/') is used as "uniform" directory separator.

Definition at line 69 of file fs.cpp.

{
    return QDir::fromNativeSeparators(path);
}

Referenced by BitTorrent::TorrentImpl::actualStorageLocation(), branchPath(), RSS::Feed::Feed(), fileName(), BitTorrent::TorrentInfo::filePath(), TorrentsController::filesAction(), BitTorrent::Session::finishedTorrentExportDirectory(), folderName(), Preferences::getScanDirsLastPath(), BitTorrent::TorrentImpl::handleFileRenamedAlert(), PluginSelectDialog::iconDownloadFinished(), BitTorrent::Session::IPFilterFile(), FileSystemPathComboEdit::item(), Preferences::lastLocationPath(), BitTorrent::DBResumeDataStorage::load(), BitTorrent::BencodeResumeDataStorage::loadTorrentResumeData(), MainWindow::on_actionOpen_triggered(), TorrentCreatorDialog::onCreateButtonClicked(), Utils::Gui::openFolderSelect(), Utils::Gui::openPath(), SearchPluginManager::pluginDownloadFinished(), BitTorrent::AbstractFileStorage::renameFile(), BitTorrent::AbstractFileStorage::renameFolder(), FileSystemPathEdit::selectedPath(), BitTorrent::Session::setFinishedTorrentExportDirectory(), BitTorrent::Session::setIPFilterFile(), Preferences::setLastLocationPath(), RSS::AutoDownloadRule::setSavePath(), Preferences::setScanDirsLastPath(), BitTorrent::Session::setTorrentExportDirectory(), TorrentContentModel::setupModelData(), BitTorrent::Session::torrentExportDirectory(), and BitTorrent::TorrentImpl::TorrentImpl().

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toValidFileSystemName()

QString Utils::Fs::toValidFileSystemName	(	const QString &	name,
		bool	allowSeparators = false,
		const QString &	pad = QLatin1String(" ")
	)

Definition at line 237 of file fs.cpp.

{
    const QRegularExpression regex(allowSeparators ? "[:?\"*<>|]+" : "[\\\\/:?\"*<>|]+");
 
    QString validName = name.trimmed();
    validName.replace(regex, pad);
    qDebug() << "toValidFileSystemName:" << name << "=>" << validName;
 
    return validName;
}

Referenced by BitTorrent::Session::categoryDownloadPath(), TorrentCategoryDialog::categoryNameChanged(), BitTorrent::Session::categorySavePath(), BitTorrent::Session::exportTorrentFile(), RSS::Feed::Feed(), and TorrentCategoryDialog::useDownloadPathChanged().

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