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Diffstat (limited to 'src/corelib/io/qfilesystemengine.cpp')
| -rw-r--r-- | src/corelib/io/qfilesystemengine.cpp | 385 |
1 files changed, 385 insertions, 0 deletions
diff --git a/src/corelib/io/qfilesystemengine.cpp b/src/corelib/io/qfilesystemengine.cpp new file mode 100644 index 0000000..d9d802e --- /dev/null +++ b/src/corelib/io/qfilesystemengine.cpp @@ -0,0 +1,385 @@ +/**************************************************************************** +** +** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). +** All rights reserved. +** Contact: Nokia Corporation (qt-info@nokia.com) +** +** This file is part of the QtCore module of the Qt Toolkit. +** +** $QT_BEGIN_LICENSE:LGPL$ +** No Commercial Usage +** This file contains pre-release code and may not be distributed. +** You may use this file in accordance with the terms and conditions +** contained in the Technology Preview License Agreement accompanying +** this package. +** +** GNU Lesser General Public License Usage +** Alternatively, this file may be used under the terms of the GNU Lesser +** General Public License version 2.1 as published by the Free Software +** Foundation and appearing in the file LICENSE.LGPL included in the +** packaging of this file. Please review the following information to +** ensure the GNU Lesser General Public License version 2.1 requirements +** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. +** +** In addition, as a special exception, Nokia gives you certain additional +** rights. These rights are described in the Nokia Qt LGPL Exception +** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. +** +** If you have questions regarding the use of this file, please contact +** Nokia at qt-info@nokia.com. +** +** +** +** +** +** +** +** +** $QT_END_LICENSE$ +** +****************************************************************************/ + +#include "qfilesystemengine_p.h" +#include <QtCore/qdir.h> +#include <QtCore/qset.h> +#include <QtCore/qstringbuilder.h> +#include <QtCore/private/qabstractfileengine_p.h> +#ifdef QT_BUILD_CORE_LIB +#include <QtCore/private/qresource_p.h> +#endif + +QT_BEGIN_NAMESPACE + +/*! + \internal + + Returns the canonicalized form of \a path (i.e., with all symlinks + resolved, and all redundant path elements removed. +*/ +QString QFileSystemEngine::slowCanonicalized(const QString &path) +{ + if (path.isEmpty()) + return path; + + QFileInfo fi; + const QChar slash(QLatin1Char('/')); + QString tmpPath = path; + int separatorPos = 0; + QSet<QString> nonSymlinks; + QSet<QString> known; + + known.insert(path); + do { +#ifdef Q_OS_WIN + if (separatorPos == 0) { + if (tmpPath.size() >= 2 && tmpPath.at(0) == slash && tmpPath.at(1) == slash) { + // UNC, skip past the first two elements + separatorPos = tmpPath.indexOf(slash, 2); + } else if (tmpPath.size() >= 3 && tmpPath.at(1) == QLatin1Char(':') && tmpPath.at(2) == slash) { + // volume root, skip since it can not be a symlink + separatorPos = 2; + } + } + if (separatorPos != -1) +#endif + separatorPos = tmpPath.indexOf(slash, separatorPos + 1); + QString prefix = separatorPos == -1 ? tmpPath : tmpPath.left(separatorPos); + if ( +#ifdef Q_OS_SYMBIAN + // Symbian doesn't support directory symlinks, so do not check for link unless we + // are handling the last path element. This not only slightly improves performance, + // but also saves us from lot of unnecessary platform security check failures + // when dealing with files under *:/private directories. + separatorPos == -1 && +#endif + !nonSymlinks.contains(prefix)) { + fi.setFile(prefix); + if (fi.isSymLink()) { + QString target = fi.symLinkTarget(); + if(QFileInfo(target).isRelative()) + target = fi.absolutePath() + slash + target; + if (separatorPos != -1) { + if (fi.isDir() && !target.endsWith(slash)) + target.append(slash); + target.append(tmpPath.mid(separatorPos)); + } + tmpPath = QDir::cleanPath(target); + separatorPos = 0; + + if (known.contains(tmpPath)) + return QString(); + known.insert(tmpPath); + } else { + nonSymlinks.insert(prefix); + } + } + } while (separatorPos != -1); + + return QDir::cleanPath(tmpPath); +} + +static inline bool _q_checkEntry(QFileSystemEntry &entry, QFileSystemMetaData &data, bool resolvingEntry) +{ + if (resolvingEntry) { + if (!QFileSystemEngine::fillMetaData(entry, data, QFileSystemMetaData::ExistsAttribute) + || !data.exists()) { + data.clear(); + return false; + } + } + + return true; +} + +static inline bool _q_checkEntry(QAbstractFileEngine *&engine, bool resolvingEntry) +{ + if (resolvingEntry) { + if (!(engine->fileFlags(QAbstractFileEngine::FlagsMask) & QAbstractFileEngine::ExistsFlag)) { + delete engine; + engine = 0; + return false; + } + } + + return true; +} + +static bool _q_resolveEntryAndCreateLegacyEngine_recursive(QFileSystemEntry &entry, QFileSystemMetaData &data, + QAbstractFileEngine *&engine, bool resolvingEntry = false) +{ + QString const &filePath = entry.filePath(); + if ((engine = qt_custom_file_engine_handler_create(filePath))) + return _q_checkEntry(engine, resolvingEntry); + +#if defined(QT_BUILD_CORE_LIB) + for (int prefixSeparator = 0; prefixSeparator < filePath.size(); ++prefixSeparator) { + QChar const ch = filePath[prefixSeparator]; + if (ch == QLatin1Char('/')) + break; + + if (ch == QLatin1Char(':')) { + if (prefixSeparator == 0) { + engine = new QResourceFileEngine(filePath); + return _q_checkEntry(engine, resolvingEntry); + } + + if (prefixSeparator == 1) + break; + + const QStringList &paths = QDir::searchPaths(filePath.left(prefixSeparator)); + for (int i = 0; i < paths.count(); i++) { + entry = QFileSystemEntry(paths.at(i) % QLatin1Char('/') % filePath.mid(prefixSeparator + 1)); + // Recurse! + if (_q_resolveEntryAndCreateLegacyEngine_recursive(entry, data, engine, true)) + return true; + } + + // entry may have been clobbered at this point. + return false; + } + + // There's no need to fully validate the prefix here. Consulting the + // unicode tables could be expensive and validation is already + // performed in QDir::setSearchPaths. + // + // if (!ch.isLetterOrNumber()) + // break; + } +#endif // defined(QT_BUILD_CORE_LIB) + + return _q_checkEntry(entry, data, resolvingEntry); +} + +/*! + \internal + + Resolves the \a entry (see QDir::searchPaths) and returns an engine for + it, but never a QFSFileEngine. + + \returns a file engine that can be used to access the entry. Returns 0 if + QFileSystemEngine API should be used to query and interact with the file + system object. +*/ +QAbstractFileEngine *QFileSystemEngine::resolveEntryAndCreateLegacyEngine( + QFileSystemEntry &entry, QFileSystemMetaData &data) { + QFileSystemEntry copy = entry; + QAbstractFileEngine *engine = 0; + + if (_q_resolveEntryAndCreateLegacyEngine_recursive(copy, data, engine)) + // Reset entry to resolved copy. + entry = copy; + else + data.clear(); + + return engine; +} + +//these unix functions are in this file, because they are shared by symbian port +//for open C file handles. +#ifdef Q_OS_UNIX +//static +bool QFileSystemEngine::fillMetaData(int fd, QFileSystemMetaData &data) +{ + data.entryFlags &= ~QFileSystemMetaData::PosixStatFlags; + data.knownFlagsMask |= QFileSystemMetaData::PosixStatFlags; + + QT_STATBUF statBuffer; + if (QT_FSTAT(fd, &statBuffer) == 0) { + data.fillFromStatBuf(statBuffer); + return true; + } + + return false; +} + +void QFileSystemMetaData::fillFromStatBuf(const QT_STATBUF &statBuffer) +{ + // Permissions + if (statBuffer.st_mode & S_IRUSR) + entryFlags |= QFileSystemMetaData::OwnerReadPermission; + if (statBuffer.st_mode & S_IWUSR) + entryFlags |= QFileSystemMetaData::OwnerWritePermission; + if (statBuffer.st_mode & S_IXUSR) + entryFlags |= QFileSystemMetaData::OwnerExecutePermission; + + if (statBuffer.st_mode & S_IRGRP) + entryFlags |= QFileSystemMetaData::GroupReadPermission; + if (statBuffer.st_mode & S_IWGRP) + entryFlags |= QFileSystemMetaData::GroupWritePermission; + if (statBuffer.st_mode & S_IXGRP) + entryFlags |= QFileSystemMetaData::GroupExecutePermission; + + if (statBuffer.st_mode & S_IROTH) + entryFlags |= QFileSystemMetaData::OtherReadPermission; + if (statBuffer.st_mode & S_IWOTH) + entryFlags |= QFileSystemMetaData::OtherWritePermission; + if (statBuffer.st_mode & S_IXOTH) + entryFlags |= QFileSystemMetaData::OtherExecutePermission; + + // Type + if ((statBuffer.st_mode & S_IFMT) == S_IFREG) + entryFlags |= QFileSystemMetaData::FileType; + else if ((statBuffer.st_mode & S_IFMT) == S_IFDIR) + entryFlags |= QFileSystemMetaData::DirectoryType; + else + entryFlags |= QFileSystemMetaData::SequentialType; + + // Attributes + entryFlags |= QFileSystemMetaData::ExistsAttribute; + size_ = statBuffer.st_size; +#if !defined(QWS) && !defined(Q_WS_QPA) && defined(Q_OS_MAC) \ + && MAC_OS_X_VERSION_MAX_ALLOWED >= MAC_OS_X_VERSION_10_5 + if (statBuffer.st_flags & UF_HIDDEN) { + entryFlags |= QFileSystemMetaData::HiddenAttribute; + knownFlagsMask |= QFileSystemMetaData::HiddenAttribute; + } +#endif + + // Times +#ifdef Q_OS_SYMBIAN + modificationTime_ = qt_symbian_time_t_To_TTime(statBuffer.st_mtime); +#else + creationTime_ = statBuffer.st_ctime ? statBuffer.st_ctime : statBuffer.st_mtime; + modificationTime_ = statBuffer.st_mtime; + accessTime_ = statBuffer.st_atime; + userId_ = statBuffer.st_uid; + groupId_ = statBuffer.st_gid; +#endif +} + +void QFileSystemMetaData::fillFromDirEnt(const QT_DIRENT &entry) +{ + // ### This will clear all entry flags and knownFlagsMask + switch (entry.d_type) + { + case DT_DIR: + knownFlagsMask = QFileSystemMetaData::LinkType + | QFileSystemMetaData::FileType + | QFileSystemMetaData::DirectoryType + | QFileSystemMetaData::SequentialType + | QFileSystemMetaData::ExistsAttribute; + + entryFlags = QFileSystemMetaData::DirectoryType + | QFileSystemMetaData::ExistsAttribute; + + break; + + case DT_BLK: + case DT_CHR: + case DT_FIFO: + case DT_SOCK: + // ### System attribute + knownFlagsMask = QFileSystemMetaData::LinkType + | QFileSystemMetaData::FileType + | QFileSystemMetaData::DirectoryType + | QFileSystemMetaData::BundleType + | QFileSystemMetaData::AliasType + | QFileSystemMetaData::SequentialType + | QFileSystemMetaData::ExistsAttribute; + + entryFlags = QFileSystemMetaData::SequentialType + | QFileSystemMetaData::ExistsAttribute; + + break; + + case DT_LNK: + knownFlagsMask = QFileSystemMetaData::LinkType; + entryFlags = QFileSystemMetaData::LinkType; + break; + + case DT_REG: + knownFlagsMask = QFileSystemMetaData::LinkType + | QFileSystemMetaData::FileType + | QFileSystemMetaData::DirectoryType + | QFileSystemMetaData::BundleType + | QFileSystemMetaData::SequentialType + | QFileSystemMetaData::ExistsAttribute; + + entryFlags = QFileSystemMetaData::FileType + | QFileSystemMetaData::ExistsAttribute; + + break; + + case DT_UNKNOWN: + default: + clear(); + } +} + +#endif + +//static +QString QFileSystemEngine::resolveUserName(const QFileSystemEntry &entry, QFileSystemMetaData &metaData) +{ +#if defined (Q_OS_SYMBIAN) + Q_UNUSED(entry); + Q_UNUSED(metaData); + return QString(); +#elif defined(Q_OS_WIN) + Q_UNUSED(metaData); + return QFileSystemEngine::owner(entry, QAbstractFileEngine::OwnerUser); +#else //(Q_OS_UNIX) + if (!metaData.hasFlags(QFileSystemMetaData::UserId)) + QFileSystemEngine::fillMetaData(entry, metaData, QFileSystemMetaData::UserId); + return resolveUserName(metaData.userId()); +#endif +} + +//static +QString QFileSystemEngine::resolveGroupName(const QFileSystemEntry &entry, QFileSystemMetaData &metaData) +{ +#if defined (Q_OS_SYMBIAN) + Q_UNUSED(entry); + Q_UNUSED(metaData); + return QString(); +#elif defined(Q_OS_WIN) + Q_UNUSED(metaData); + return QFileSystemEngine::owner(entry, QAbstractFileEngine::OwnerGroup); +#else //(Q_OS_UNIX) + if (!metaData.hasFlags(QFileSystemMetaData::GroupId)) + QFileSystemEngine::fillMetaData(entry, metaData, QFileSystemMetaData::GroupId); + return resolveGroupName(metaData.groupId()); +#endif +} + +QT_END_NAMESPACE |