File indexing completed on 2024-05-05 16:13:49

 /*
     SPDX-FileCopyrightText: 2000-2002 Stephan Kulow <coolo@kde.org>
     SPDX-FileCopyrightText: 2000-2002 David Faure <faure@kde.org>
     SPDX-FileCopyrightText: 2000-2002 Waldo Bastian <bastian@kde.org>
     SPDX-FileCopyrightText: 2006 Allan Sandfeld Jensen <sandfeld@kde.org>
     SPDX-FileCopyrightText: 2007 Thiago Macieira <thiago@kde.org>
     SPDX-FileCopyrightText: 2023 Harald Sitter <sitter@kde.org>
 
     SPDX-License-Identifier: LGPL-2.0-or-later
 */
 
 #include "file.h"
 
 #include <QDirIterator>
 
 #include <QStorageInfo>
 
 #include "../../utils_p.h"
 #include "kioglobal_p.h"
 
 #ifdef Q_OS_UNIX
 #include "legacycodec.h"
 #endif
 
 #include <assert.h>
 #include <cerrno>
 #ifdef Q_OS_WIN
 #include <qt_windows.h>
 #include <sys/utime.h>
 #include <winsock2.h> //struct timeval
 #else
 #include <utime.h>
 #endif
 
 #include <QCoreApplication>
 #include <QDate>
 #include <QTemporaryFile>
 #include <QVarLengthArray>
 #ifdef Q_OS_WIN
 #include <QDir>
 #include <QFileInfo>
 #endif
 
 #include <KConfigGroup>
 #include <KLocalizedString>
 #include <KShell>
 #include <QDataStream>
 #include <QDebug>
 #include <QMimeDatabase>
 #include <QStandardPaths>
 #include <kmountpoint.h>
 
 #include <ioworker_defaults.h>
 #include <kdirnotify.h>
 #include <workerfactory.h>
 
 Q_LOGGING_CATEGORY(KIO_FILE, "kf.kio.workers.file")
 
 class KIOPluginFactory : public KIO::WorkerFactory
 {
     Q_OBJECT
     Q_PLUGIN_METADATA(IID "org.kde.kio.slave.file" FILE "file.json")
 public:
     std::unique_ptr<KIO::SlaveBase> createWorker(const QByteArray &pool, const QByteArray &app) override
     {
         return std::make_unique<FileProtocol>(pool, app);
     }
 };
 
 using namespace KIO;
 
 static constexpr int s_maxIPCSize = 1024 * 32;
 
 static QString readLogFile(const QByteArray &_filename);
 
 extern "C" Q_DECL_EXPORT int kdemain(int argc, char **argv)
 {
     QCoreApplication app(argc, argv); // needed for QSocketNotifier
     app.setApplicationName(QStringLiteral("kio_file"));
 
     if (argc != 4) {
         fprintf(stderr, "Usage: kio_file protocol domain-socket1 domain-socket2\n");
         exit(-1);
     }
 
 #ifdef Q_OS_UNIX
     // From Qt doc : "Note that you should not delete codecs yourself: once created they become Qt's responsibility"
     (void)new LegacyCodec;
 #endif
 
     FileProtocol slave(argv[2], argv[3]);
 
     // Make sure the first kDebug is after the slave ctor (which sets a SIGPIPE handler)
     // This is useful in case kdeinit was autostarted by another app, which then exited and closed fd2
     // (e.g. ctest does that, or closing the terminal window would do that)
     // qDebug() << "Starting" << getpid();
 
     slave.dispatchLoop();
 
     // qDebug() << "Done";
     return 0;
 }
 
 static QFile::Permissions modeToQFilePermissions(int mode)
 {
     QFile::Permissions perms;
     if (mode & S_IRUSR) {
         perms |= QFile::ReadOwner;
     }
     if (mode & S_IWUSR) {
         perms |= QFile::WriteOwner;
     }
     if (mode & S_IXUSR) {
         perms |= QFile::ExeOwner;
     }
     if (mode & S_IRGRP) {
         perms |= QFile::ReadGroup;
     }
     if (mode & S_IWGRP) {
         perms |= QFile::WriteGroup;
     }
     if (mode & S_IXGRP) {
         perms |= QFile::ExeGroup;
     }
     if (mode & S_IROTH) {
         perms |= QFile::ReadOther;
     }
     if (mode & S_IWOTH) {
         perms |= QFile::WriteOther;
     }
     if (mode & S_IXOTH) {
         perms |= QFile::ExeOther;
     }
 
     return perms;
 }
 
 FileProtocol::FileProtocol(const QByteArray &pool, const QByteArray &app)
     : SlaveBase(QByteArrayLiteral("file"), pool, app)
     , mFile(nullptr)
 {
     testMode = !qEnvironmentVariableIsEmpty("KIOSLAVE_FILE_ENABLE_TESTMODE");
 }
 
 FileProtocol::~FileProtocol()
 {
 }
 
 void FileProtocol::chmod(const QUrl &url, int permissions)
 {
     const QString path(url.toLocalFile());
     const QByteArray _path(QFile::encodeName(path));
     /* FIXME: Should be atomic */
 #ifdef Q_OS_UNIX
     // QFile::Permissions does not support special attributes like sticky
     if (::chmod(_path.constData(), permissions) == -1 ||
 #else
     if (!QFile::setPermissions(path, modeToQFilePermissions(permissions)) ||
 #endif
         (setACL(_path.data(), permissions, false) == -1) ||
         /* if not a directory, cannot set default ACLs */
         (setACL(_path.data(), permissions, true) == -1 && errno != ENOTDIR)) {
         if (auto err = execWithElevatedPrivilege(CHMOD, {_path, permissions}, errno)) {
             if (!err.wasCanceled()) {
                 switch (err) {
                 case EPERM:
                 case EACCES:
                     error(KIO::ERR_ACCESS_DENIED, path);
                     break;
 #if defined(ENOTSUP)
                 case ENOTSUP: // from setACL since chmod can't return ENOTSUP
                     error(KIO::ERR_UNSUPPORTED_ACTION, i18n("Setting ACL for %1", path));
                     break;
 #endif
                 case ENOSPC:
                     error(KIO::ERR_DISK_FULL, path);
                     break;
                 default:
                     error(KIO::ERR_CANNOT_CHMOD, path);
                 }
                 return;
             }
         }
     }
 
     finished();
 }
 
 void FileProtocol::setModificationTime(const QUrl &url, const QDateTime &mtime)
 {
     const QString path(url.toLocalFile());
     QT_STATBUF statbuf;
     if (QT_LSTAT(QFile::encodeName(path).constData(), &statbuf) == 0) {
         struct utimbuf utbuf;
         utbuf.actime = statbuf.st_atime; // access time, unchanged
         utbuf.modtime = mtime.toSecsSinceEpoch(); // modification time
         if (::utime(QFile::encodeName(path).constData(), &utbuf) != 0) {
             if (auto err = execWithElevatedPrivilege(UTIME, {path, qint64(utbuf.actime), qint64(utbuf.modtime)}, errno)) {
                 if (!err.wasCanceled()) {
                     // TODO: errno could be EACCES, EPERM, EROFS
                     error(KIO::ERR_CANNOT_SETTIME, path);
                 }
             }
         } else {
             finished();
         }
     } else {
         error(KIO::ERR_DOES_NOT_EXIST, path);
     }
 }
 
 void FileProtocol::mkdir(const QUrl &url, int permissions)
 {
     const QString path(url.toLocalFile());
 
     // qDebug() << path << "permission=" << permissions;
 
     // Remove existing file or symlink, if requested (#151851)
     if (metaData(QStringLiteral("overwrite")) == QLatin1String("true")) {
         if (!QFile::remove(path)) {
             execWithElevatedPrivilege(DEL, {path}, errno);
         }
     }
 
     QT_STATBUF buff;
     if (QT_LSTAT(QFile::encodeName(path).constData(), &buff) == -1) {
         bool dirCreated = QDir().mkdir(path);
         if (!dirCreated) {
             if (auto err = execWithElevatedPrivilege(MKDIR, {path}, errno)) {
                 if (!err.wasCanceled()) {
                     // TODO: add access denied & disk full (or another reasons) handling (into Qt, possibly)
                     error(KIO::ERR_CANNOT_MKDIR, path);
                 }
                 return;
             }
             dirCreated = true;
         }
 
         if (dirCreated) {
             if (permissions != -1) {
                 chmod(url, permissions);
             } else {
                 finished();
             }
             return;
         }
     }
 
     if (Utils::isDirMask(buff.st_mode)) {
         // qDebug() << "ERR_DIR_ALREADY_EXIST";
         error(KIO::ERR_DIR_ALREADY_EXIST, path);
         return;
     }
     error(KIO::ERR_FILE_ALREADY_EXIST, path);
     return;
 }
 
 void FileProtocol::redirect(const QUrl &url)
 {
     QUrl redir(url);
     redir.setScheme(configValue(QStringLiteral("DefaultRemoteProtocol"), QStringLiteral("smb")));
 
     // if we would redirect into the Windows world, let's also check for the
     // DavWWWRoot "token" which in the Windows world tells win explorer to access
     // a webdav url
     // https://www.webdavsystem.com/server/access/windows
     const QLatin1String davRoot("/DavWWWRoot/");
     if ((redir.scheme() == QLatin1String("smb")) && redir.path().startsWith(davRoot)) {
         redir.setPath(redir.path().mid(davRoot.size() - 1)); // remove /DavWWWRoot
         redir.setScheme(QStringLiteral("webdav"));
     }
 
     redirection(redir);
     finished();
 }
 
 void FileProtocol::get(const QUrl &url)
 {
     if (!url.isLocalFile()) {
         redirect(url);
         return;
     }
 
     const QString path(url.toLocalFile());
     QT_STATBUF buff;
     if (QT_STAT(QFile::encodeName(path).constData(), &buff) == -1) {
         if (errno == EACCES) {
             error(KIO::ERR_ACCESS_DENIED, path);
         } else {
             error(KIO::ERR_DOES_NOT_EXIST, path);
         }
         return;
     }
 
     if (Utils::isDirMask(buff.st_mode)) {
         error(KIO::ERR_IS_DIRECTORY, path);
         return;
     }
     if (!Utils::isRegFileMask(buff.st_mode)) {
         error(KIO::ERR_CANNOT_OPEN_FOR_READING, path);
         return;
     }
 
     QFile f(path);
     if (!f.open(QIODevice::ReadOnly)) {
         if (auto err = tryOpen(f, QFile::encodeName(path), O_RDONLY, S_IRUSR, errno)) {
             if (!err.wasCanceled()) {
                 error(KIO::ERR_CANNOT_OPEN_FOR_READING, path);
             }
             return;
         }
     }
 
 #if HAVE_FADVISE
     // TODO check return code
     posix_fadvise(f.handle(), 0, 0, POSIX_FADV_SEQUENTIAL);
 #endif
 
     // Determine the MIME type of the file to be retrieved, and emit it.
     // This is mandatory in all slaves (for KRun/BrowserRun to work)
     // In real "remote" slaves, this is usually done using mimeTypeForFileNameAndData
     // after receiving some data. But we don't know how much data the mimemagic rules
     // need, so for local files, better use mimeTypeForFile.
     QMimeDatabase db;
     QMimeType mt = db.mimeTypeForFile(url.toLocalFile());
     mimeType(mt.name());
     // Emit total size AFTER the MIME type
     totalSize(buff.st_size);
 
     KIO::filesize_t processed_size = 0;
 
     QString resumeOffset = metaData(QStringLiteral("range-start"));
     if (resumeOffset.isEmpty()) {
         resumeOffset = metaData(QStringLiteral("resume")); // old name
     }
     if (!resumeOffset.isEmpty()) {
         bool ok;
         KIO::fileoffset_t offset = resumeOffset.toLongLong(&ok);
         if (ok && (offset > 0) && (offset < buff.st_size)) {
             if (f.seek(offset)) {
                 canResume();
                 processed_size = offset;
                 // qDebug() << "Resume offset:" << KIO::number(offset);
             }
         }
     }
 
     char buffer[s_maxIPCSize];
     QByteArray array;
 
     while (1) {
         if (wasKilled()) {
             finished();
             return;
         }
         int n = f.read(buffer, s_maxIPCSize);
         if (n == -1) {
             if (errno == EINTR) {
                 continue;
             }
             error(KIO::ERR_CANNOT_READ, path);
             f.close();
             return;
         }
         if (n == 0) {
             break; // Finished
         }
 
         array = QByteArray::fromRawData(buffer, n);
         data(array);
         array.clear();
 
         processed_size += n;
         processedSize(processed_size);
 
         // qDebug() << "Processed: " << KIO::number (processed_size);
     }
 
     data(QByteArray());
 
     f.close();
 
     processedSize(buff.st_size);
     finished();
 }
 
 void FileProtocol::open(const QUrl &url, QIODevice::OpenMode mode)
 {
     // qDebug() << url;
 
     QString openPath = url.toLocalFile();
     QT_STATBUF buff;
     if (QT_STAT(QFile::encodeName(openPath).constData(), &buff) == -1) {
         if (errno == EACCES) {
             error(KIO::ERR_ACCESS_DENIED, openPath);
         } else {
             error(KIO::ERR_DOES_NOT_EXIST, openPath);
         }
         return;
     }
 
     if (Utils::isDirMask(buff.st_mode)) {
         error(KIO::ERR_IS_DIRECTORY, openPath);
         return;
     }
     if (!Utils::isRegFileMask(buff.st_mode)) {
         error(KIO::ERR_CANNOT_OPEN_FOR_READING, openPath);
         return;
     }
 
     mFile = new QFile(openPath);
     if (!mFile->open(mode)) {
         if (mode & QIODevice::ReadOnly) {
             error(KIO::ERR_CANNOT_OPEN_FOR_READING, openPath);
         } else {
             error(KIO::ERR_CANNOT_OPEN_FOR_WRITING, openPath);
         }
 
         return;
     }
     // Determine the MIME type of the file to be retrieved, and emit it.
     // This is mandatory in all slaves (for KRun/BrowserRun to work).
     // If we're not opening the file ReadOnly or ReadWrite, don't attempt to
     // read the file and send the MIME type.
     if (mode & QIODevice::ReadOnly) {
         QMimeDatabase db;
         QMimeType mt = db.mimeTypeForFile(url.toLocalFile());
         mimeType(mt.name());
     }
 
     totalSize(buff.st_size);
     position(0);
 
     opened();
 }
 
 void FileProtocol::read(KIO::filesize_t bytes)
 {
     // qDebug() << "File::open -- read";
     Q_ASSERT(mFile && mFile->isOpen());
 
     QVarLengthArray<char> buffer(bytes);
 
     qint64 bytesRead = mFile->read(buffer.data(), bytes);
 
     if (bytesRead == -1) {
         qCWarning(KIO_FILE) << "Couldn't read. Error:" << mFile->errorString();
         error(KIO::ERR_CANNOT_READ, mFile->fileName());
         closeWithoutFinish();
     } else {
         const QByteArray fileData = QByteArray::fromRawData(buffer.data(), bytesRead);
         data(fileData);
     }
 }
 
 void FileProtocol::write(const QByteArray &data)
 {
     // qDebug() << "File::open -- write";
     Q_ASSERT(mFile && mFile->isWritable());
 
     qint64 bytesWritten = mFile->write(data);
 
     if (bytesWritten == -1) {
         if (mFile->error() == QFileDevice::ResourceError) { // disk full
             error(KIO::ERR_DISK_FULL, mFile->fileName());
             closeWithoutFinish();
         } else {
             qCWarning(KIO_FILE) << "Couldn't write. Error:" << mFile->errorString();
             error(KIO::ERR_CANNOT_WRITE, mFile->fileName());
             closeWithoutFinish();
         }
     } else {
         mFile->flush();
         written(bytesWritten);
     }
 }
 
 void FileProtocol::seek(KIO::filesize_t offset)
 {
     // qDebug() << "File::open -- seek";
     Q_ASSERT(mFile && mFile->isOpen());
 
     if (mFile->seek(offset)) {
         position(offset);
     } else {
         error(KIO::ERR_CANNOT_SEEK, mFile->fileName());
         closeWithoutFinish();
     }
 }
 
 void FileProtocol::truncate(KIO::filesize_t length)
 {
     Q_ASSERT(mFile && mFile->isOpen());
 
     if (mFile->resize(length)) {
         truncated(length);
     } else {
         error(KIO::ERR_CANNOT_TRUNCATE, mFile->fileName());
         closeWithoutFinish();
     }
 }
 
 void FileProtocol::closeWithoutFinish()
 {
     Q_ASSERT(mFile);
 
     delete mFile;
     mFile = nullptr;
 }
 
 void FileProtocol::close()
 {
     // qDebug() << "File::open -- close ";
     closeWithoutFinish();
     finished();
 }
 
 void FileProtocol::put(const QUrl &url, int _mode, KIO::JobFlags _flags)
 {
     if (privilegeOperationUnitTestMode()) {
         finished();
         return;
     }
 
     const QString dest_orig = url.toLocalFile();
 
     // qDebug() << dest_orig << "mode=" << _mode;
 
     QString dest_part(dest_orig + QLatin1String(".part"));
 
     QT_STATBUF buff_orig;
     const bool bOrigExists = (QT_LSTAT(QFile::encodeName(dest_orig).constData(), &buff_orig) != -1);
     bool bPartExists = false;
     const bool bMarkPartial = configValue(QStringLiteral("MarkPartial"), true);
 
     if (bMarkPartial) {
         QT_STATBUF buff_part;
         bPartExists = (QT_LSTAT(QFile::encodeName(dest_part).constData(), &buff_part) != -1);
 
         if (bPartExists //
             && !(_flags & KIO::Resume) //
             && !(_flags & KIO::Overwrite) //
             && buff_part.st_size > 0 //
             && Utils::isRegFileMask(buff_part.st_mode) //
         ) {
             // qDebug() << "calling canResume with" << KIO::number(buff_part.st_size);
 
             // Maybe we can use this partial file for resuming
             // Tell about the size we have, and the app will tell us
             // if it's ok to resume or not.
             _flags |= canResume(buff_part.st_size) ? KIO::Resume : KIO::DefaultFlags;
 
             // qDebug() << "got answer" << (_flags & KIO::Resume);
         }
     }
 
     if (bOrigExists && !(_flags & KIO::Overwrite) && !(_flags & KIO::Resume)) {
         if (Utils::isDirMask(buff_orig.st_mode)) {
             error(KIO::ERR_DIR_ALREADY_EXIST, dest_orig);
         } else {
             error(KIO::ERR_FILE_ALREADY_EXIST, dest_orig);
         }
         return;
     }
 
     // Don't change permissions of the original file
     if (bOrigExists) {
         _mode = static_cast<int>(buff_orig.st_mode);
         // Make sure the value fit by casting it back. mode_t is possibly larger than int
         Q_ASSERT(static_cast<decltype(buff_orig.st_mode)>(_mode) == buff_orig.st_mode);
     }
 #if !defined(Q_OS_WIN)
     uid_t owner = -1;
     gid_t group = -1;
     if (bOrigExists) {
         owner = buff_orig.st_uid;
         group = buff_orig.st_gid;
     }
 #endif
 
     int result;
     QString dest;
     QFile f;
 
     // Loop until we got 0 (end of data)
     do {
         QByteArray buffer;
         dataReq(); // Request for data
         result = readData(buffer);
 
         if (result >= 0) {
             if (dest.isEmpty()) {
                 if (bMarkPartial) {
                     // qDebug() << "Appending .part extension to" << dest_orig;
                     dest = dest_part;
                     if (bPartExists && !(_flags & KIO::Resume)) {
                         // qDebug() << "Deleting partial file" << dest_part;
                         QFile::remove(dest_part);
                         // Catch errors when we try to open the file.
                     }
                 } else {
                     dest = dest_orig;
                     if (bOrigExists && !(_flags & KIO::Resume)) {
                         // qDebug() << "Deleting destination file" << dest_orig;
                         QFile::remove(dest_orig);
                         // Catch errors when we try to open the file.
                     }
                 }
 
                 f.setFileName(dest);
 
                 if ((_flags & KIO::Resume)) {
                     f.open(QIODevice::ReadWrite | QIODevice::Append);
                 } else {
                     f.open(QIODevice::Truncate | QIODevice::WriteOnly);
                     if (_mode != -1) {
                         // WABA: Make sure that we keep writing permissions ourselves,
                         // otherwise we can be in for a surprise on NFS.
                         mode_t initialMode = _mode | S_IWUSR | S_IRUSR;
                         f.setPermissions(modeToQFilePermissions(initialMode));
                     }
                 }
 
                 if (!f.isOpen()) {
                     int oflags = 0;
                     int filemode = _mode;
 
                     if ((_flags & KIO::Resume)) {
                         oflags = O_RDWR | O_APPEND;
                     } else {
                         oflags = O_WRONLY | O_TRUNC | O_CREAT;
                         if (_mode != -1) {
                             filemode = _mode | S_IWUSR | S_IRUSR;
                         }
                     }
 
                     if (auto err = tryOpen(f, QFile::encodeName(dest), oflags, filemode, errno)) {
                         if (!err.wasCanceled()) {
                             // qDebug() << "####################### COULD NOT WRITE" << dest << "_mode=" << _mode;
                             // qDebug() << "QFile error==" << f.error() << "(" << f.errorString() << ")";
 
                             if (f.error() == QFileDevice::PermissionsError) {
                                 error(KIO::ERR_WRITE_ACCESS_DENIED, dest);
                             } else {
                                 error(KIO::ERR_CANNOT_OPEN_FOR_WRITING, dest);
                             }
                         }
                         return;
                     } else {
 #ifndef Q_OS_WIN
                         if ((_flags & KIO::Resume)) {
                             execWithElevatedPrivilege(CHOWN, {dest, getuid(), getgid()}, errno);
                             QFile::setPermissions(dest, modeToQFilePermissions(filemode));
                         }
 #endif
                     }
                 }
             }
 
             if (f.write(buffer) == -1) {
                 if (f.error() == QFile::ResourceError) { // disk full
                     error(KIO::ERR_DISK_FULL, dest_orig);
                     result = -2; // means: remove dest file
                 } else {
                     qCWarning(KIO_FILE) << "Couldn't write. Error:" << f.errorString();
                     error(KIO::ERR_CANNOT_WRITE, dest_orig);
                     result = -1;
                 }
             }
         } else {
             qCWarning(KIO_FILE) << "readData() returned" << result;
             error(KIO::ERR_CANNOT_WRITE, dest_orig);
         }
     } while (result > 0);
 
     // An error occurred deal with it.
     if (result < 0) {
         // qDebug() << "Error during 'put'. Aborting.";
 
         if (f.isOpen()) {
             f.close();
 
             QT_STATBUF buff;
             if (QT_STAT(QFile::encodeName(dest).constData(), &buff) == 0) {
                 int size = configValue(QStringLiteral("MinimumKeepSize"), DEFAULT_MINIMUM_KEEP_SIZE);
                 if (buff.st_size < size) {
                     QFile::remove(dest);
                 }
             }
         }
         return;
     }
 
     if (!f.isOpen()) { // we got nothing to write out, so we never opened the file
         finished();
         return;
     }
 
     f.close();
 
     if (f.error() != QFile::NoError) {
         qCWarning(KIO_FILE) << "Error when closing file descriptor:" << f.errorString();
         error(KIO::ERR_CANNOT_WRITE, dest_orig);
         return;
     }
 
     // after full download rename the file back to original name
     if (bMarkPartial) {
         // QFile::rename() never overwrites the destination file unlike ::remove,
         // so we must remove it manually first
         if (_flags & KIO::Overwrite) {
             if (!QFile::remove(dest_orig)) {
                 execWithElevatedPrivilege(DEL, {dest_orig}, errno);
             }
         }
 
         if (!QFile::rename(dest, dest_orig)) {
             if (auto err = execWithElevatedPrivilege(RENAME, {dest, dest_orig}, errno)) {
                 if (!err.wasCanceled()) {
                     qCWarning(KIO_FILE) << " Couldn't rename " << dest << " to " << dest_orig;
                     error(KIO::ERR_CANNOT_RENAME_PARTIAL, dest_orig);
                 }
                 return;
             }
         }
         org::kde::KDirNotify::emitFileRenamed(QUrl::fromLocalFile(dest), QUrl::fromLocalFile(dest_orig));
     }
 
     // set final permissions
     if (_mode != -1 && !(_flags & KIO::Resume)) {
         if (!QFile::setPermissions(dest_orig, modeToQFilePermissions(_mode))) {
             // couldn't chmod. Eat the error if the filesystem apparently doesn't support it.
             KMountPoint::Ptr mp = KMountPoint::currentMountPoints().findByPath(dest_orig);
             if (mp && mp->testFileSystemFlag(KMountPoint::SupportsChmod)) {
                 if (tryChangeFileAttr(CHMOD, {dest_orig, _mode}, errno)) {
                     warning(i18n("Could not change permissions for\n%1", dest_orig));
                 }
             }
         }
     }
 
     // set original owner and group
 #if !defined(Q_OS_WIN)
     if (bOrigExists) {
         if (::chown(qUtf8Printable(dest_orig), owner, group) < 0) {
             warning(i18nc("@info", "Could not change owner and group for\n%1", dest_orig));
         }
     }
 #endif
 
     // set modification time
     const QString mtimeStr = metaData(QStringLiteral("modified"));
     if (!mtimeStr.isEmpty()) {
         QDateTime dt = QDateTime::fromString(mtimeStr, Qt::ISODate);
         if (dt.isValid()) {
             QT_STATBUF dest_statbuf;
             if (QT_STAT(QFile::encodeName(dest_orig).constData(), &dest_statbuf) == 0) {
 #ifndef Q_OS_WIN
                 struct timeval utbuf[2];
                 // access time
                 utbuf[0].tv_sec = dest_statbuf.st_atime; // access time, unchanged  ## TODO preserve msec
                 utbuf[0].tv_usec = 0;
                 // modification time
                 utbuf[1].tv_sec = dt.toSecsSinceEpoch();
                 utbuf[1].tv_usec = dt.time().msec() * 1000;
                 utimes(QFile::encodeName(dest_orig).constData(), utbuf);
 #else
                 struct utimbuf utbuf;
                 utbuf.actime = dest_statbuf.st_atime;
                 utbuf.modtime = dt.toSecsSinceEpoch();
                 if (utime(QFile::encodeName(dest_orig).constData(), &utbuf) != 0) {
                     tryChangeFileAttr(UTIME, {dest_orig, qint64(utbuf.actime), qint64(utbuf.modtime)}, errno);
                 }
 #endif
             }
         }
     }
 
     // We have done our job => finish
     finished();
 }
 
 void FileProtocol::special(const QByteArray &data)
 {
     int tmp;
     QDataStream stream(data);
 
     stream >> tmp;
     switch (tmp) {
     case 1: {
         QString fstype;
         QString dev;
         QString point;
         qint8 iRo;
 
         stream >> iRo >> fstype >> dev >> point;
 
         bool ro = (iRo != 0);
 
         // qDebug() << "MOUNTING fstype=" << fstype << " dev=" << dev << " point=" << point << " ro=" << ro;
         mount(ro, fstype.toLatin1().constData(), dev, point);
         break;
     }
     case 2: {
         QString point;
         stream >> point;
         unmount(point);
         break;
     }
     default:
         break;
     }
 }
 
 static QStringList fallbackSystemPath()
 {
     return QStringList{
         QStringLiteral("/sbin"),
         QStringLiteral("/bin"),
     };
 }
 
 void FileProtocol::mount(bool _ro, const char *_fstype, const QString &_dev, const QString &_point)
 {
     // qDebug() << "fstype=" << _fstype;
 
 #ifdef _WIN32_WCE
     error(KIO::ERR_CANNOT_MOUNT, i18n("mounting is not supported by Windows CE."));
     return;
 #endif
 
     const QLatin1String label("LABEL=");
     const QLatin1String uuid("UUID=");
     QTemporaryFile tmpFile;
     tmpFile.setAutoRemove(false);
     tmpFile.open();
     QByteArray tmpFileName = QFile::encodeName(tmpFile.fileName());
     QByteArray dev;
     if (_dev.startsWith(label)) { // turn LABEL=foo into -L foo (#71430)
         QString labelName = _dev.mid(label.size());
         dev = "-L " + QFile::encodeName(KShell::quoteArg(labelName)); // is it correct to assume same encoding as filesystem?
     } else if (_dev.startsWith(uuid)) { // and UUID=bar into -U bar
         QString uuidName = _dev.mid(uuid.size());
         dev = "-U " + QFile::encodeName(KShell::quoteArg(uuidName));
     } else {
         dev = QFile::encodeName(KShell::quoteArg(_dev)); // get those ready to be given to a shell
     }
 
     QByteArray point = QFile::encodeName(KShell::quoteArg(_point));
     bool fstype_empty = !_fstype || !*_fstype;
     QByteArray fstype = KShell::quoteArg(QString::fromLatin1(_fstype)).toLatin1(); // good guess
     QByteArray readonly = _ro ? "-r" : "";
     QByteArray mountProg = QStandardPaths::findExecutable(QStringLiteral("mount")).toLocal8Bit();
     if (mountProg.isEmpty()) {
         mountProg = QStandardPaths::findExecutable(QStringLiteral("mount"), fallbackSystemPath()).toLocal8Bit();
     }
     if (mountProg.isEmpty()) {
         error(KIO::ERR_CANNOT_MOUNT, i18n("Could not find program \"mount\""));
         return;
     }
 
     // Two steps, in case mount doesn't like it when we pass all options
     for (int step = 0; step <= 1; step++) {
         QByteArray buffer = mountProg + ' ';
         // Mount using device only if no fstype nor mountpoint (KDE-1.x like)
         if (!dev.isEmpty() && _point.isEmpty() && fstype_empty) {
             buffer += dev;
         } else if (!_point.isEmpty() && dev.isEmpty() && fstype_empty) {
             // Mount using the mountpoint, if no fstype nor device (impossible in first step)
             buffer += point;
         } else if (!_point.isEmpty() && !dev.isEmpty() && fstype_empty) { // mount giving device + mountpoint but no fstype
             buffer += readonly + ' ' + dev + ' ' + point;
         } else { // mount giving device + mountpoint + fstype
             buffer += readonly + " -t " + fstype + ' ' + dev + ' ' + point;
         }
         if (fstype == "ext2" || fstype == "ext3" || fstype == "ext4") {
             buffer += " -o errors=remount-ro";
         }
 
         buffer += " 2>" + tmpFileName;
         // qDebug() << buffer;
 
         int mount_ret = system(buffer.constData());
 
         QString err = readLogFile(tmpFileName);
         if (err.isEmpty() && mount_ret == 0) {
             finished();
             return;
         } else {
             // Didn't work - or maybe we just got a warning
             KMountPoint::Ptr mp = KMountPoint::currentMountPoints().findByDevice(_dev);
             // Is the device mounted ?
             if (mp && mount_ret == 0) {
                 // qDebug() << "mount got a warning:" << err;
                 warning(err);
                 finished();
                 return;
             } else {
                 if ((step == 0) && !_point.isEmpty()) {
                     // qDebug() << err;
                     // qDebug() << "Mounting with those options didn't work, trying with only mountpoint";
                     fstype = "";
                     fstype_empty = true;
                     dev = "";
                     // The reason for trying with only mountpoint (instead of
                     // only device) is that some people (hi Malte!) have the
                     // same device associated with two mountpoints
                     // for different fstypes, like /dev/fd0 /mnt/e2floppy and
                     // /dev/fd0 /mnt/dosfloppy.
                     // If the user has the same mountpoint associated with two
                     // different devices, well they shouldn't specify the
                     // mountpoint but just the device.
                 } else {
                     error(KIO::ERR_CANNOT_MOUNT, err);
                     return;
                 }
             }
         }
     }
 }
 
 void FileProtocol::unmount(const QString &_point)
 {
 #ifdef _WIN32_WCE
     error(KIO::ERR_CANNOT_MOUNT, i18n("unmounting is not supported by Windows CE."));
     return;
 #endif
 
     QByteArray buffer;
 
     QTemporaryFile tmpFile;
     tmpFile.setAutoRemove(false);
     tmpFile.open();
 
     QByteArray umountProg = QStandardPaths::findExecutable(QStringLiteral("umount")).toLocal8Bit();
     if (umountProg.isEmpty()) {
         umountProg = QStandardPaths::findExecutable(QStringLiteral("umount"), fallbackSystemPath()).toLocal8Bit();
     }
     if (umountProg.isEmpty()) {
         error(KIO::ERR_CANNOT_UNMOUNT, i18n("Could not find program \"umount\""));
         return;
     }
 
     QByteArray tmpFileName = QFile::encodeName(tmpFile.fileName());
 
     buffer = umountProg + ' ' + QFile::encodeName(KShell::quoteArg(_point)) + " 2>" + tmpFileName;
     system(buffer.constData());
 
     QString err = readLogFile(tmpFileName);
     if (err.isEmpty()) {
         finished();
     } else {
         error(KIO::ERR_CANNOT_UNMOUNT, err);
     }
 }
 
 /*************************************
  *
  * Utilities
  *
  *************************************/
 
 static QString readLogFile(const QByteArray &_filename)
 {
     QString result;
     QFile file(QFile::decodeName(_filename));
     if (file.open(QIODevice::ReadOnly)) {
         result = QString::fromLocal8Bit(file.readAll());
     }
     (void)file.remove();
     return result;
 }
 
 // We could port this to KTempDir::removeDir but then we wouldn't be able to tell the user
 // where exactly the deletion failed, in case of errors.
 bool FileProtocol::deleteRecursive(const QString &path)
 {
     // qDebug() << path;
     QDirIterator it(path, QDir::AllEntries | QDir::NoDotAndDotDot | QDir::System | QDir::Hidden, QDirIterator::Subdirectories);
     QStringList dirsToDelete;
     while (it.hasNext()) {
         const QString itemPath = it.next();
         // qDebug() << "itemPath=" << itemPath;
         const QFileInfo info = it.fileInfo();
         if (info.isDir() && !info.isSymLink()) {
             dirsToDelete.prepend(itemPath);
         } else {
             // qDebug() << "QFile::remove" << itemPath;
             if (!QFile::remove(itemPath)) {
                 if (auto err = execWithElevatedPrivilege(DEL, {itemPath}, errno)) {
                     if (!err.wasCanceled()) {
                         error(KIO::ERR_CANNOT_DELETE, itemPath);
                     }
                     return false;
                 }
             }
         }
     }
     QDir dir;
     for (const QString &itemPath : std::as_const(dirsToDelete)) {
         // qDebug() << "QDir::rmdir" << itemPath;
         if (!dir.rmdir(itemPath)) {
             if (auto err = execWithElevatedPrivilege(RMDIR, {itemPath}, errno)) {
                 if (!err.wasCanceled()) {
                     error(KIO::ERR_CANNOT_DELETE, itemPath);
                 }
                 return false;
             }
         }
     }
     return true;
 }
 
 void FileProtocol::fileSystemFreeSpace(const QUrl &url)
 {
     if (url.isLocalFile()) {
         QStorageInfo storageInfo(url.toLocalFile());
         if (storageInfo.isValid() && storageInfo.isReady()) {
             setMetaData(QStringLiteral("total"), QString::number(storageInfo.bytesTotal()));
             setMetaData(QStringLiteral("available"), QString::number(storageInfo.bytesAvailable()));
 
             finished();
         } else {
             error(KIO::ERR_CANNOT_STAT, url.url());
         }
     } else {
         error(KIO::ERR_UNSUPPORTED_PROTOCOL, url.url());
     }
 }
 
 void FileProtocol::virtual_hook(int id, void *data)
 {
     switch (id) {
     case SlaveBase::GetFileSystemFreeSpace: {
         QUrl *url = static_cast<QUrl *>(data);
         fileSystemFreeSpace(*url);
         break;
     }
     case SlaveBase::Truncate: {
         auto length = static_cast<KIO::filesize_t *>(data);
         truncate(*length);
         break;
     }
     default: {
         SlaveBase::virtual_hook(id, data);
         break;
     }
     }
 }
 
 // needed for JSON file embedding
 #include "file.moc"
 
 #include "moc_file.cpp"