C++ QFileInfo::symLinkTarget方法代码示例

QT_BEGIN_NAMESPACE

// Find out if our parent process is gdb by looking at the 'exe' symlink under /proc,.
// or, for older Linuxes, read out 'cmdline'.
static bool runningUnderDebugger()
{
#if defined(QT_DEBUG) && defined(Q_OS_LINUX)
    const QString parentProc = QLatin1String("/proc/") + QString::number(getppid());
    const QFileInfo parentProcExe(parentProc + QLatin1String("/exe"));
    if (parentProcExe.isSymLink())
        return parentProcExe.symLinkTarget().endsWith(QLatin1String("/gdb"));
    QFile f(parentProc + QLatin1String("/cmdline"));
    if (!f.open(QIODevice::ReadOnly))
        return false;
    QByteArray s;
    char c;
    while (f.getChar(&c) && c) {
        if (c == '/')
            s.clear();
        else
            s += c;
    }
    return s == "gdb";
#else
    return false;
#endif
}

void listOpenedFd()
{
    qDebug() << Q_FUNC_INFO;

    pid_t pid = getpid();
    qDebug() << Q_FUNC_INFO << pid;

    QString path("/proc/");
    path.append(QString::number(pid));
    path.append("/fd");

    QDir pidDir(path);

    qDebug() << Q_FUNC_INFO << path;

    QStringList list = pidDir.entryList();

    QStringList::const_iterator it = list.begin();
    QStringList::const_iterator itEnd = list.end();

    QFileInfo fi;
    for(; it != itEnd; ++it)
    {
        QString file_path = pidDir.filePath(*it);
        fi.setFile(file_path);

        qDebug() << Q_FUNC_INFO << fi.isSymLink() << fi.symLinkTarget();
    }
}

int QBookDevel::getPid(const char *exe) {
    static struct dirent *ent;
    DIR *dir = opendir("/proc");
    if (!dir)
          return 0;
    while( (ent = readdir(dir)) ) {
      if(!ent || !ent->d_name) {
          closedir(dir);
          return 0;
      }
      if(*ent->d_name < '0' || *ent->d_name > '9')
          continue;

      QString *path = new QString();
      path->append("/proc/");
      path->append(ent->d_name);
      path->append("/exe");
      qDebug () << *path;
      QFileInfo f = QFileInfo(*path);

      if (f.isSymLink()) {
           QFileInfo l = QFileInfo (f.symLinkTarget());
            if (l.completeBaseName() == exe) {
                closedir(dir);
                return atoi(ent->d_name);
            }
      }
      // We need to check also cmdline as a lot of binaries are links to busybox
      path = new QString();
      path->append("/proc/");
      path->append(ent->d_name);
      path->append("/cmdline");
      QFile *file = new QFile(*path);
      delete path;
      if (!file->open(QIODevice::ReadOnly))
          continue;

      QTextStream stream(file);
      QString line = stream.readLine();
      file->close();
      delete file;
      QStringList args = line.split((QChar)0); // cmdline is separated with NULLs!
      if (args.size() > 0) {
          f = QFileInfo (args.at(0));
          if (f.completeBaseName() == exe) {
              closedir(dir);
              return atoi(ent->d_name);
          }

      }
    }
    closedir(dir);
    return 0;
}

/*!
    \internal

    Returns the canonicalized form of \a path (i.e., with all symlinks
    resolved, and all redundant path elements removed.
*/
QString QFSFileEnginePrivate::canonicalized(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
        // UNC, skip past the first two elements
        if (separatorPos == 0 && tmpPath.startsWith(QLatin1String("//")))
            separatorPos = tmpPath.indexOf(slash, 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 (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 void disablePtrace()
{
#if HAVE_PR_SET_DUMPABLE
    // Allow ptrace when running inside gdb
    const qint64 pid = QCoreApplication::applicationPid();
    const QFileInfo process(QStringLiteral("/proc/%1/exe").arg(pid));
    if (process.isSymLink() && process.symLinkTarget().endsWith(QLatin1String("/gdb")))
        return;

    ::prctl(PR_SET_DUMPABLE, 0);
#endif
}

/**
 * Returns if a file is supported by nomacs or not.
 * Note: this function only checks for a valid extension.
 * @param fileInfo the file info of the file to be validated.
 * @return bool true if the file format is supported.
 **/
bool DkUtils::isValid(const QFileInfo& fileInfo) {

	printf("accepting file...\n");

	QFileInfo fInfo = fileInfo;
	if (fInfo.isSymLink())
		fInfo = fileInfo.symLinkTarget();

	if (!fInfo.exists())
		return false;

	QString fileName = fInfo.fileName();

	return hasValidSuffix(fileName);
}

/*!
    \internal

    Returns the canonicalized form of \a path (i.e., with all symlinks
    resolved, and all redundant path elements removed.
*/
QString QFSFileEnginePrivate::canonicalized(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;

    do {
#ifdef Q_OS_WIN
        // UNC, skip past the first two elements
        if (separatorPos == 0 && tmpPath.startsWith(QLatin1String("//")))
            separatorPos = tmpPath.indexOf(slash, 2);
        if (separatorPos != -1)
#endif
        separatorPos = tmpPath.indexOf(slash, separatorPos + 1);
        QString prefix = separatorPos == -1 ? tmpPath : tmpPath.left(separatorPos);
        if (!nonSymlinks.contains(prefix)) {
            if (known.contains(prefix))
                return QString();
            known.insert(prefix);

            fi.setFile(prefix);
            if (fi.isSymLink()) {
                QString target = fi.symLinkTarget();
                if (separatorPos != -1) {
                    if (fi.isDir() && !target.endsWith(slash))
                        target.append(slash);
                    target.append(tmpPath.mid(separatorPos));
                }
                tmpPath = target;
                separatorPos = 0;
            } else {
                nonSymlinks.insert(prefix);
            }
        }
    } while (separatorPos != -1);

    return QDir::cleanPath(tmpPath);
}

bool ServiceHost::FormatResponse( HTTPRequest *pRequest, QFileInfo oInfo )
{
    QString sName = oInfo.absoluteFilePath();

    if (oInfo.exists())
    {
        if (oInfo.isSymLink())
            pRequest->FormatFileResponse( oInfo.symLinkTarget() );
        else
            pRequest->FormatFileResponse( oInfo.absoluteFilePath() );
    }
    else
    {
        // force return as a 404...
        pRequest->FormatFileResponse( "" );
    }

    return true;
}

QSharedPointer<QByteArray> DkImageContainer::loadFileToBuffer(const QFileInfo fileInfo) {

	QFileInfo fInfo = fileInfo.isSymLink() ? fileInfo.symLinkTarget() : fileInfo;

#ifdef WITH_QUAZIP
	if (isFromZip()) 
		return zipData->extractImage(zipData->getZipFileInfo(), zipData->getImageFileInfo());
#endif

	if (fInfo.suffix().contains("psd")) {	// for now just psd's are not cached because their file might be way larger than the part we need to read
		return QSharedPointer<QByteArray>(new QByteArray());
	}

	QFile file(fInfo.absoluteFilePath());
	file.open(QIODevice::ReadOnly);

	QSharedPointer<QByteArray> ba(new QByteArray(file.readAll()));
	file.close();

	return ba;
}

FileTreeItem::FileTreeItem(const QFileInfo & fileInfo,const FileTreeItem * parentItem,
                           bool scan_subdirs,bool encripted) {
    m_path = (parentItem->rootItem?"":parentItem->archivePath()) + fileInfo.fileName();
    if (fileInfo.isDir()) m_path += "/";
    m_perms = permissions(fileInfo);
    m_user = fileInfo.owner();
    m_group = fileInfo.group();
    m_link_to = fileInfo.symLinkTarget();
    m_file_size = fileInfo.size();
    m_date = fileInfo.lastModified();
    m_parentItem = (FileTreeItem *)parentItem;
    m_encripted = encripted;
    rootItem = false;
    if (is_dir()) {
        if (scan_subdirs) {
            QDirIterator di(fileInfo.filePath(),QDir::AllEntries | QDir::Hidden | QDir::System | QDir::NoDotAndDotDot);
            while (di.hasNext()) {
                di.next();
                appendChild(new FileTreeItem(QFileInfo(di.filePath()),this,true,encripted));
            }
        }
    }
}

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 (!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);
}

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);
}

/*!
    \internal

    Returns the canonicalized form of \a path (i.e., with all symlinks
    resolved, and all redundant path elements removed.
*/
QString QFSFileEnginePrivate::canonicalized(const QString &path)
{
    if (path.isEmpty())
        return path;

    // FIXME let's see if this stuff works, then we might be able to remove some of the other code.
#if defined(Q_OS_UNIX) && !defined(Q_OS_SYMBIAN)
    if (path.size() == 1 && path.at(0) == QLatin1Char('/'))
        return path;
#endif
#if defined(Q_OS_LINUX) || defined(Q_OS_SYMBIAN) || defined(Q_OS_MAC)
    // ... but Linux with uClibc does not have it
#if !defined(__UCLIBC__)
    char *ret = 0;
#if defined(Q_OS_MAC) && !defined(Q_OS_IPHONE)
    // Mac OS X 10.5.x doesn't support the realpath(X,0) extension we use here.
    if (QSysInfo::MacintoshVersion >= QSysInfo::MV_10_6) {
        ret = realpath(path.toLocal8Bit().constData(), (char*)0);
    } else {
        // on 10.5 we can use FSRef to resolve the file path.
        FSRef fsref;
        if (FSPathMakeRef((const UInt8 *)QDir::cleanPath(path).toUtf8().data(), &fsref, 0) == noErr) {
            CFURLRef urlref = CFURLCreateFromFSRef(NULL, &fsref);
            CFStringRef canonicalPath = CFURLCopyFileSystemPath(urlref, kCFURLPOSIXPathStyle);
            QString ret = QCFString::toQString(canonicalPath);
            CFRelease(canonicalPath);
            CFRelease(urlref);
            return ret;
        }
    }
#else
    ret = realpath(path.toLocal8Bit().constData(), (char*)0);
#endif
    if (ret) {
        QString canonicalPath = QDir::cleanPath(QString::fromLocal8Bit(ret));
        free(ret);
        return canonicalPath;
    }
#endif
#endif

    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
        // UNC, skip past the first two elements
        if (separatorPos == 0 && tmpPath.startsWith(QLatin1String("//")))
            separatorPos = tmpPath.indexOf(slash, 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 (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);
}

void FileOrganiserWidget::addFile(const QString &pFileName,
                                  QStandardItem *pDropItem,
                                  const QAbstractItemView::DropIndicatorPosition &pDropPosition)
{
    if (!pDropItem)
        // pDropItem is not valid, so...

        return;

    // Check that we are indeed dealing with a file

    QFileInfo fileInfo = pFileName;

    if (!fileInfo.isFile())
        // We are not dealing with a file, so...

        return;

    // Check whether we are dropping a symbolic link

    QString fileName = pFileName;

    if (fileInfo.isSymLink())
        // We are dropping a symbolic link, so retrieve its target

        fileName = fileInfo.symLinkTarget();

    // Check whether the file exists

    if (QFileInfo(fileName).exists()) {
        // The target file exists, so add it above/on/below pDropItem, depending
        // on the drop position and only if the file isn't already present

        // First, determine the item that will own the file

        QStandardItem *newParentItem = parentItem(pDropItem, pDropPosition);

        // Second, if the file is not already owned, then add it to
        // newParentItem and this to the right place, depending on the value of
        // pDropPosition

        if (!ownedBy(fileName, newParentItem)) {
            QStandardItem *newFileItem = new QStandardItem(QIcon(FileIcon),
                                                           QFileInfo(fileName).fileName());

            newFileItem->setData(fileName, Item::Path);

            dropItem(pDropItem, pDropPosition, newParentItem, newFileItem);

            // Add the file to our file manager
            // Note: it doesn't matter whether or not the file is already being
            //       monitored, since if that's the case then the current
            //       instance will be ignored

            mFileManager->manage(fileName);

            // Resize the widget, just in case the new file takes more space
            // than is visible

            resizeToContents();
        } else {
            // The file is already owned by newParentItem, so just repaint the
            // widget to make sure that the dragging & dropping overlay
            // disappears

            repaint();
        }
    }
}

bool CopyDirectoryOperation::performOperation()
{
    const QStringList args = arguments();
    if (args.count() != 2) {
        setError(InvalidArguments);
        setErrorString(tr("Invalid arguments in %0: %1 arguments given, 2 expected.").arg(name())
            .arg(args.count()));
        return false;
    }
    const QString sourcePath = args.at(0);
    const QString targetPath = args.at(1);

    const QFileInfo sourceInfo(sourcePath);
    const QFileInfo targetInfo(targetPath);
    if (!sourceInfo.exists() || !sourceInfo.isDir() || !targetInfo.exists() || !targetInfo.isDir()) {
        setError(InvalidArguments);
        setErrorString(tr("Invalid arguments in %0: Directories are invalid: %1 %2").arg(name())
            .arg(sourcePath).arg(targetPath));
        return false;
    }

    const QDir sourceDir = sourceInfo.absoluteDir();
    const QDir targetDir = targetInfo.absoluteDir();

    AutoPush autoPush(this);
    QDirIterator it(sourceInfo.absoluteFilePath(), QDir::NoDotAndDotDot | QDir::AllEntries | QDir::Hidden,
        QDirIterator::Subdirectories);
    while (it.hasNext()) {
        const QString itemName = it.next();
        const QFileInfo itemInfo(sourceDir.absoluteFilePath(itemName));
        const QString relativePath = sourceDir.relativeFilePath(itemName);
        if (itemInfo.isSymLink()) {
            // Check if symlink target is inside copied directory
            const QString linkTarget = itemInfo.symLinkTarget();
            if (linkTarget.startsWith(sourceDir.absolutePath())) {
                // create symlink to copied location
                const QString linkTargetRelative = sourceDir.relativeFilePath(linkTarget);
                QFile(targetDir.absoluteFilePath(linkTargetRelative))
                    .link(targetDir.absoluteFilePath(relativePath));
            } else {
                // create symlink pointing to original location
                QFile(linkTarget).link(targetDir.absoluteFilePath(relativePath));
            }
            // add file entry
            autoPush.m_files.prepend(targetDir.absoluteFilePath(relativePath));
            emit outputTextChanged(autoPush.m_files.first());
        } else if (itemInfo.isDir()) {
            if (!targetDir.mkpath(targetDir.absoluteFilePath(relativePath))) {
                setError(InvalidArguments);
                setErrorString(tr("Could not create %0").arg(targetDir.absoluteFilePath(relativePath)));
                return false;
            }
        } else {
            if (!QFile::copy(sourceDir.absoluteFilePath(itemName), targetDir.absoluteFilePath(relativePath))) {
                setError(InvalidArguments);
                setErrorString(tr("Could not copy %0 to %1").arg(sourceDir.absoluteFilePath(itemName))
                    .arg(targetDir.absoluteFilePath(relativePath)));
                return false;
            }
            autoPush.m_files.prepend(targetDir.absoluteFilePath(relativePath));
            emit outputTextChanged(autoPush.m_files.first());
        }
    }
    return true;
}