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path: root/tdeioslave/trash/trashimpl.cpp
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/* This file is part of the TDE project
   Copyright (C) 2004 David Faure <faure@kde.org>

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Library General Public
   License as published by the Free Software Foundation; either
   version 2 of the License, or (at your option) any later version.

   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public License
   along with this library; see the file COPYING.LIB.  If not, write to
   the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
   Boston, MA 02110-1301, USA.
*/

#include "trashimpl.h"
#include "discspaceutil.h"
#include "trash_constant.h"

#include <tdelocale.h>
#include <klargefile.h>
#include <tdeio/renamedlg.h>
#include <tdeio/job.h>
#include <kdebug.h>
#include <kurl.h>
#include <kdirnotify_stub.h>
#include <tdeglobal.h>
#include <kstandarddirs.h>
#include <tdeglobalsettings.h>
#include <kmountpoint.h>
#include <tdemessagebox.h>
#include <tdefileitem.h>
#include <tdeio/chmodjob.h>

#include <tqapplication.h>
#include <tqeventloop.h>
#include <tqfile.h>
#include <tqdir.h>

#include <sys/stat.h>
#include <sys/types.h>
#include <sys/param.h>
#include <fcntl.h>
#include <unistd.h>
#include <dirent.h>
#include <stdlib.h>
#include <errno.h>

TrashImpl::TrashImpl() :
    TQObject(),
    m_lastErrorCode( 0 ),
    m_initStatus( InitToBeDone ),
    m_lastId( 0 ),
    m_homeDevice( 0 ),
    m_trashDirectoriesScanned( false ),
    m_mibEnum( TDEGlobal::locale()->fileEncodingMib() ),
    // not using tdeio_trashrc since TDEIO uses that one already for tdeio_trash
    // so better have a separate one, for faster parsing by e.g. kmimetype.cpp
    m_config( "trashrc" )
{
    KDE_struct_stat buff;
    if ( KDE_lstat( TQFile::encodeName( TQDir::homeDirPath() ), &buff ) == 0 ) {
        m_homeDevice = buff.st_dev;
    } else {
        kdError() << "Should never happen: couldn't stat $HOME " << strerror( errno ) << endl;
    }
}

/**
 * Test if a directory exists, create otherwise
 * @param _name full path of the directory
 * @return errorcode, or 0 if the dir was created or existed already
 * Warning, don't use return value like a bool
 */
int TrashImpl::testDir( const TQString &_name ) const
{
  DIR *dp = opendir( TQFile::encodeName(_name) );
  if ( dp == NULL )
  {
    TQString name = _name;
    if ( name.endsWith( "/" ) )
      name.truncate( name.length() - 1 );
    TQCString path = TQFile::encodeName(name);

    bool ok = ::mkdir( path, S_IRWXU ) == 0;
    if ( !ok && errno == EEXIST ) {
#if 0 // this would require to use SlaveBase's method to ask the question
        //int ret = KMessageBox::warningYesNo( 0, i18n("%1 is a file, but TDE needs it to be a directory. Move it to %2.orig and create directory?").arg(name).arg(name) );
        //if ( ret == KMessageBox::Yes ) {
#endif
            if ( ::rename( path, path + ".orig" ) == 0 ) {
                ok = ::mkdir( path, S_IRWXU ) == 0;
            } else { // foo.orig existed already. How likely is that?
                ok = false;
            }
            if ( !ok ) {
                return TDEIO::ERR_DIR_ALREADY_EXIST;
            }
#if 0
        //} else {
        //    return 0;
        //}
#endif
    }
    if ( !ok )
    {
        //KMessageBox::sorry( 0, i18n( "Couldn't create directory %1. Check for permissions." ).arg( name ) );
        kdWarning() << "could not create " << name << endl;
        return TDEIO::ERR_COULD_NOT_MKDIR;
    } else {
        kdDebug() << name << " created." << endl;
    }
  }
  else // exists already
  {
    closedir( dp );
  }
  return 0; // success
}

bool TrashImpl::init()
{
    if ( m_initStatus == InitOK )
        return true;
    if ( m_initStatus == InitError )
        return false;

    // Check the trash directory and its info and files subdirs
    // see also kdesktop/init.cc for first time initialization
    m_initStatus = InitError;
    // $XDG_DATA_HOME/Trash, i.e. ~/.local/share/Trash by default.
    const TQString xdgDataDir = TDEGlobal::dirs()->localxdgdatadir();
    if ( !TDEStandardDirs::makeDir( xdgDataDir, 0700 ) ) {
        kdWarning() << "failed to create " << xdgDataDir << endl;
        return false;
    }

    const TQString trashDir = xdgDataDir + "Trash";
    int err;
    if ( ( err = testDir( trashDir ) ) ) {
        error( err, trashDir );
        return false;
    }
    if ( ( err = testDir( trashDir + "/info" ) ) ) {
        error( err, trashDir + "/info" );
        return false;
    }
    if ( ( err = testDir( trashDir + "/files" ) ) ) {
        error( err, trashDir + "/files" );
        return false;
    }
    m_trashDirectories.insert( 0, trashDir );
    m_initStatus = InitOK;
    kdDebug() << k_funcinfo << "initialization OK, home trash dir: " << trashDir << endl;
    return true;
}

void TrashImpl::migrateOldTrash()
{
    kdDebug() << k_funcinfo << endl;
    const TQString oldTrashDir = TDEGlobalSettings::trashPath();
    const TQStrList entries = listDir( oldTrashDir );
    bool allOK = true;
    TQStrListIterator entryIt( entries );
    for (; entryIt.current(); ++entryIt) {
        TQString srcPath = TQFile::decodeName( *entryIt );
        if ( srcPath == "." || srcPath == ".." || srcPath == ".directory" )
            continue;
        srcPath.prepend( oldTrashDir ); // make absolute
        int trashId;
        TQString fileId;
        if ( !createInfo( srcPath, trashId, fileId ) ) {
            kdWarning() << "Trash migration: failed to create info for " << srcPath << endl;
            allOK = false;
        } else {
            bool ok = moveToTrash( srcPath, trashId, fileId );
            if ( !ok ) {
                (void)deleteInfo( trashId, fileId );
                kdWarning() << "Trash migration: failed to create info for " << srcPath << endl;
                allOK = false;
            } else {
                kdDebug() << "Trash migration: moved " << srcPath << endl;
            }
        }
    }
    if ( allOK ) {
        // We need to remove the old one, otherwise the desktop will have two trashcans...
        kdDebug() << "Trash migration: all OK, removing old trash directory" << endl;
        synchronousDel( oldTrashDir, false, true );
    }
}

bool TrashImpl::createInfo( const TQString& origPath, int& trashId, TQString& fileId )
{
    kdDebug() << k_funcinfo << origPath << endl;
    // Check source
    const TQCString origPath_c( TQFile::encodeName( origPath ) );
    KDE_struct_stat buff_src;
    if ( KDE_lstat( origPath_c.data(), &buff_src ) == -1 ) {
        if ( errno == EACCES )
           error( TDEIO::ERR_ACCESS_DENIED, origPath );
        else
           error( TDEIO::ERR_DOES_NOT_EXIST, origPath );
        return false;
    }

    // Choose destination trash
    trashId = findTrashDirectory( origPath );
    if ( trashId < 0 ) {
        kdWarning() << "OUCH - internal error, TrashImpl::findTrashDirectory returned " << trashId << endl;
        return false; // ### error() needed?
    }
    kdDebug() << k_funcinfo << "trashing to " << trashId << endl;

    // Grab original filename
    KURL url;
    url.setPath( origPath );
    const TQString origFileName = url.fileName();

    // Make destination file in info/
    url.setPath( infoPath( trashId, origFileName ) ); // we first try with origFileName
    KURL baseDirectory;
    baseDirectory.setPath( url.directory() );
    // Here we need to use O_EXCL to avoid race conditions with other tdeioslave processes
    int fd = 0;
    do {
        kdDebug() << k_funcinfo << "trying to create " << url.path()  << endl;
        fd = ::open( TQFile::encodeName( url.path() ), O_WRONLY | O_CREAT | O_EXCL, 0600 );
        if ( fd < 0 ) {
            if ( errno == EEXIST ) {
                url.setFileName( TDEIO::RenameDlg::suggestName( baseDirectory, url.fileName() ) );
                // and try again on the next iteration
            } else {
                error( TDEIO::ERR_COULD_NOT_WRITE, url.path() );
                return false;
            }
        }
    } while ( fd < 0 );
    const TQString infoPath = url.path();
    fileId = url.fileName();
    Q_ASSERT( fileId.endsWith( ".trashinfo" ) );
    fileId.truncate( fileId.length() - 10 ); // remove .trashinfo from fileId

    FILE* file = ::fdopen( fd, "w" );
    if ( !file ) { // can't see how this would happen
        error( TDEIO::ERR_COULD_NOT_WRITE, infoPath );
        return false;
    }

    // Contents of the info file. We could use KSimpleConfig, but that would
    // mean closing and reopening fd, i.e. opening a race condition...
    TQCString info = "[Trash Info]\n";
    info += "Path=";
    // Escape filenames according to the way they are encoded on the filesystem
    // All this to basically get back to the raw 8-bit representation of the filename...
    if ( trashId == 0 ) // home trash: absolute path
        info += KURL::encode_string( origPath, m_mibEnum ).latin1();
    else
        info += KURL::encode_string( makeRelativePath( topDirectoryPath( trashId ), origPath ), m_mibEnum ).latin1();
    info += "\n";
    info += "DeletionDate=";
    info += TQDateTime::currentDateTime().toString( Qt::ISODate ).latin1();
    info += "\n";
    size_t sz = info.size() - 1; // avoid trailing 0 from QCString

    size_t written = ::fwrite(info.data(), 1, sz, file);
    if ( written != sz ) {
        ::fclose( file );
        TQFile::remove( infoPath );
        error( TDEIO::ERR_DISK_FULL, infoPath );
        return false;
    }

    ::fclose( file );

    kdDebug() << k_funcinfo << "info file created in trashId=" << trashId << " : " << fileId << endl;
    return true;
}

TQString TrashImpl::makeRelativePath( const TQString& topdir, const TQString& path )
{
    const TQString realPath = TDEStandardDirs::realFilePath( path );
    // topdir ends with '/'
    if ( realPath.startsWith( topdir ) ) {
        const TQString rel = realPath.mid( topdir.length() );
        Q_ASSERT( rel[0] != '/' );
        return rel;
    } else { // shouldn't happen...
        kdWarning() << "Couldn't make relative path for " << realPath << " (" << path << "), with topdir=" << topdir << endl;
        return realPath;
    }
}

TQString TrashImpl::infoPath( int trashId, const TQString& fileId ) const
{
    TQString trashPath = trashDirectoryPath( trashId );
    trashPath += "/info/";
    trashPath += fileId;
    trashPath += ".trashinfo";
    return trashPath;
}

TQString TrashImpl::filesPath( int trashId, const TQString& fileId ) const
{
    TQString trashPath = trashDirectoryPath( trashId );
    trashPath += "/files/";
    trashPath += fileId;
    return trashPath;
}

bool TrashImpl::deleteInfo( int trashId, const TQString& fileId )
{
    bool ok = TQFile::remove( infoPath( trashId, fileId ) );
    if ( ok )
        fileRemoved();
    return ok;
}

bool TrashImpl::moveToTrash( const TQString& origPath, int trashId, const TQString& fileId )
{
    kdDebug() << k_funcinfo << endl;
    if ( !adaptTrashSize( origPath, trashId ) )
        return false;

    const TQString dest = filesPath( trashId, fileId );
    if ( !move( origPath, dest ) ) {
        // Maybe the move failed due to no permissions to delete source.
        // In that case, delete dest to keep things consistent, since TDEIO doesn't do it.
        if ( TQFileInfo( dest ).isFile() )
            TQFile::remove( dest );
        else
            synchronousDel( dest, false, true );
        return false;
    }
    fileAdded();
    return true;
}

bool TrashImpl::moveFromTrash( const TQString& dest, int trashId, const TQString& fileId, const TQString& relativePath )
{
    TQString src = filesPath( trashId, fileId );
    if ( !relativePath.isEmpty() ) {
        src += '/';
        src += relativePath;
    }
    if ( !move( src, dest ) )
        return false;
    return true;
}

bool TrashImpl::move( const TQString& src, const TQString& dest )
{
    if ( directRename( src, dest ) ) {
        // This notification is done by TDEIO::moveAs when using the code below
        // But if we do a direct rename we need to do the notification ourselves
        KDirNotify_stub allDirNotify( "*", "KDirNotify*" );
        KURL urlDest; urlDest.setPath( dest );
        urlDest.setPath( urlDest.directory() );
        allDirNotify.FilesAdded( urlDest );
        return true;
    }
    if ( m_lastErrorCode != TDEIO::ERR_UNSUPPORTED_ACTION )
        return false;

    KURL urlSrc, urlDest;
    urlSrc.setPath( src );
    urlDest.setPath( dest );
    kdDebug() << k_funcinfo << urlSrc << " -> " << urlDest << endl;
    TDEIO::CopyJob* job = TDEIO::moveAs( urlSrc, urlDest, false );
#ifdef TDEIO_COPYJOB_HAS_SETINTERACTIVE
    job->setInteractive( false );
#endif
    connect( job, TQT_SIGNAL( result(TDEIO::Job *) ),
             this, TQT_SLOT( jobFinished(TDEIO::Job *) ) );
    tqApp->eventLoop()->enterLoop();

    return m_lastErrorCode == 0;
}

void TrashImpl::jobFinished(TDEIO::Job* job)
{
    kdDebug() << k_funcinfo << " error=" << job->error() << endl;
    error( job->error(), job->errorText() );
    tqApp->eventLoop()->exitLoop();
}

bool TrashImpl::copyToTrash( const TQString& origPath, int trashId, const TQString& fileId )
{
    kdDebug() << k_funcinfo << endl;
    if ( !adaptTrashSize( origPath, trashId ) )
        return false;

    const TQString dest = filesPath( trashId, fileId );
    if ( !copy( origPath, dest ) )
        return false;
    fileAdded();
    return true;
}

bool TrashImpl::copyFromTrash( const TQString& dest, int trashId, const TQString& fileId, const TQString& relativePath )
{
    TQString src = filesPath( trashId, fileId );
    if ( !relativePath.isEmpty() ) {
        src += '/';
        src += relativePath;
    }
    return copy( src, dest );
}

bool TrashImpl::copy( const TQString& src, const TQString& dest )
{
    // tdeio_file's copy() method is quite complex (in order to be fast), let's just call it...
    m_lastErrorCode = 0;
    KURL urlSrc;
    urlSrc.setPath( src );
    KURL urlDest;
    urlDest.setPath( dest );
    kdDebug() << k_funcinfo << "copying " << src << " to " << dest << endl;
    TDEIO::CopyJob* job = TDEIO::copyAs( urlSrc, urlDest, false );
#ifdef TDEIO_COPYJOB_HAS_SETINTERACTIVE
    job->setInteractive( false );
#endif
    connect( job, TQT_SIGNAL( result( TDEIO::Job* ) ),
             this, TQT_SLOT( jobFinished( TDEIO::Job* ) ) );
    tqApp->eventLoop()->enterLoop();

    return m_lastErrorCode == 0;
}

bool TrashImpl::directRename( const TQString& src, const TQString& dest )
{
    kdDebug() << k_funcinfo << src << " -> " << dest << endl;
    if ( ::rename( TQFile::encodeName( src ), TQFile::encodeName( dest ) ) != 0 ) {
        if (errno == EXDEV) {
            error( TDEIO::ERR_UNSUPPORTED_ACTION, TQString::fromLatin1("rename") );
        } else {
            if (( errno == EACCES ) || (errno == EPERM)) {
                error( TDEIO::ERR_ACCESS_DENIED, dest );
            } else if (errno == EROFS) { // The file is on a read-only filesystem
                error( TDEIO::ERR_CANNOT_DELETE, src );
            } else {
                error( TDEIO::ERR_CANNOT_RENAME, src );
            }
        }
        return false;
    }
    return true;
}

#if 0
bool TrashImpl::mkdir( int trashId, const TQString& fileId, int permissions )
{
    const TQString path = filesPath( trashId, fileId );
    if ( ::mkdir( TQFile::encodeName( path ), permissions ) != 0 ) {
        if ( errno == EACCES ) {
            error( TDEIO::ERR_ACCESS_DENIED, path );
            return false;
        } else if ( errno == ENOSPC ) {
            error( TDEIO::ERR_DISK_FULL, path );
            return false;
        } else {
            error( TDEIO::ERR_COULD_NOT_MKDIR, path );
            return false;
        }
    } else {
        if ( permissions != -1 )
            ::chmod( TQFile::encodeName( path ), permissions );
    }
    return true;
}
#endif

bool TrashImpl::del( int trashId, const TQString& fileId )
{
    TQString info = infoPath(trashId, fileId);
    TQString file = filesPath(trashId, fileId);

    TQCString info_c = TQFile::encodeName(info);

    KDE_struct_stat buff;
    if ( KDE_lstat( info_c.data(), &buff ) == -1 ) {
        if ( errno == EACCES )
            error( TDEIO::ERR_ACCESS_DENIED, file );
        else
            error( TDEIO::ERR_DOES_NOT_EXIST, file );
        return false;
    }

    if ( !synchronousDel( file, true, TQFileInfo(file).isDir() ) )
        return false;

    TQFile::remove( info );
    fileRemoved();
    return true;
}

bool TrashImpl::synchronousDel( const TQString& path, bool setLastErrorCode, bool isDir )
{
    const int oldErrorCode = m_lastErrorCode;
    const TQString oldErrorMsg = m_lastErrorMessage;
    KURL url;
    url.setPath( path );

    // First ensure that all dirs have u+w permissions,
    // otherwise we won't be able to delete files in them (#130780).
    if ( isDir ) {
        kdDebug() << k_funcinfo << "chmod'ing " << url << endl;
        KFileItem fileItem( url, "inode/directory", KFileItem::Unknown );
        KFileItemList fileItemList;
        fileItemList.append( &fileItem );
        TDEIO::ChmodJob* chmodJob = TDEIO::chmod( fileItemList, 0200, 0200, TQString::null, TQString::null, true /*recursive*/, false /*showProgressInfo*/ );
        connect( chmodJob, TQT_SIGNAL( result(TDEIO::Job *) ),
                 this, TQT_SLOT( jobFinished(TDEIO::Job *) ) );
        tqApp->eventLoop()->enterLoop();
    }

    kdDebug() << k_funcinfo << "deleting " << url << endl;
    TDEIO::DeleteJob *job = TDEIO::del( url, false, false );
    connect( job, TQT_SIGNAL( result(TDEIO::Job *) ),
             this, TQT_SLOT( jobFinished(TDEIO::Job *) ) );
    tqApp->eventLoop()->enterLoop();
    bool ok = m_lastErrorCode == 0;
    if ( !setLastErrorCode ) {
        m_lastErrorCode = oldErrorCode;
        m_lastErrorMessage = oldErrorMsg;
    }
    return ok;
}

bool TrashImpl::emptyTrash()
{
    kdDebug() << k_funcinfo << endl;
    // The naive implementation "delete info and files in every trash directory"
    // breaks when deleted directories contain files owned by other users.
    // We need to ensure that the .trashinfo file is only removed when the
    // corresponding files could indeed be removed.

    const TrashedFileInfoList fileInfoList = list();

    TrashedFileInfoList::const_iterator it = fileInfoList.begin();
    const TrashedFileInfoList::const_iterator end = fileInfoList.end();
    for ( ; it != end ; ++it ) {
        const TrashedFileInfo& info = *it;
        const TQString filesPath = info.physicalPath;
        if ( synchronousDel( filesPath, true, true ) ) {
            TQFile::remove( infoPath( info.trashId, info.fileId ) );
        } // else error code is set
    }
    fileRemoved();

    return m_lastErrorCode == 0;
}

TrashImpl::TrashedFileInfoList TrashImpl::list()
{
    // Here we scan for trash directories unconditionally. This allows
    // noticing plugged-in [e.g. removeable] devices, or new mounts etc.
    scanTrashDirectories();

    TrashedFileInfoList lst;
    // For each known trash directory...
    TrashDirMap::const_iterator it = m_trashDirectories.begin();
    for ( ; it != m_trashDirectories.end() ; ++it ) {
        const int trashId = it.key();
        TQString infoPath = it.data();
        infoPath += "/info";
        // Code taken from tdeio_file
        TQStrList entryNames = listDir( infoPath );
        //char path_buffer[PATH_MAX];
        //getcwd(path_buffer, PATH_MAX - 1);
        //if ( chdir( infoPathEnc ) )
        //    continue;
        TQStrListIterator entryIt( entryNames );
        for (; entryIt.current(); ++entryIt) {
            TQString fileName = TQFile::decodeName( *entryIt );
            if ( fileName == "." || fileName == ".." )
                continue;
            if ( !fileName.endsWith( ".trashinfo" ) ) {
                kdWarning() << "Invalid info file found in " << infoPath << " : " << fileName << endl;
                continue;
            }
            fileName.truncate( fileName.length() - 10 );

            TrashedFileInfo info;
            if ( infoForFile( trashId, fileName, info ) )
                lst << info;
        }
    }
    return lst;
}

// Returns the entries in a given directory - including "." and ".."
TQStrList TrashImpl::listDir( const TQString& physicalPath )
{
    const TQCString physicalPathEnc = TQFile::encodeName( physicalPath );
    kdDebug() << k_funcinfo << "listing " << physicalPath << endl;
    TQStrList entryNames;
    DIR *dp = opendir( physicalPathEnc );
    if ( dp == 0 )
        return entryNames;
    KDE_struct_dirent *ep;
    while ( ( ep = KDE_readdir( dp ) ) != 0L )
        entryNames.append( ep->d_name );
    closedir( dp );
    return entryNames;
}

bool TrashImpl::infoForFile( int trashId, const TQString& fileId, TrashedFileInfo& info )
{
    kdDebug() << k_funcinfo << trashId << " " << fileId << endl;
    info.trashId = trashId; // easy :)
    info.fileId = fileId; // equally easy
    info.physicalPath = filesPath( trashId, fileId );
    return readInfoFile( infoPath( trashId, fileId ), info, trashId );
}

bool TrashImpl::readInfoFile( const TQString& infoPath, TrashedFileInfo& info, int trashId )
{
    KSimpleConfig cfg( infoPath, true );
    if ( !cfg.hasGroup( "Trash Info" ) ) {
        error( TDEIO::ERR_CANNOT_OPEN_FOR_READING, infoPath );
        return false;
    }
    cfg.setGroup( "Trash Info" );
    info.origPath = KURL::decode_string( cfg.readEntry( "Path" ), m_mibEnum );
    if ( info.origPath.isEmpty() )
        return false; // path is mandatory...
    if ( trashId == 0 )
        Q_ASSERT( info.origPath[0] == '/' );
    else {
        const TQString topdir = topDirectoryPath( trashId ); // includes trailing slash
        info.origPath.prepend( topdir );
    }
    TQString line = cfg.readEntry( "DeletionDate" );
    if ( !line.isEmpty() ) {
        info.deletionDate = TQT_TQDATETIME_OBJECT(TQDateTime::fromString( line, Qt::ISODate ));
    }
    return true;
}

TQString TrashImpl::physicalPath( int trashId, const TQString& fileId, const TQString& relativePath )
{
    TQString filePath = filesPath( trashId, fileId );
    if ( !relativePath.isEmpty() ) {
        filePath += "/";
        filePath += relativePath;
    }
    return filePath;
}

void TrashImpl::error( int e, const TQString& s )
{
    if ( e )
        kdDebug() << k_funcinfo << e << " " << s << endl;
    m_lastErrorCode = e;
    m_lastErrorMessage = s;
}

bool TrashImpl::isEmpty() const
{
    // For each known trash directory...
    if ( !m_trashDirectoriesScanned )
        scanTrashDirectories();
    TrashDirMap::const_iterator it = m_trashDirectories.begin();
    for ( ; it != m_trashDirectories.end() ; ++it ) {
        TQString infoPath = it.data();
        infoPath += "/info";

        DIR *dp = opendir( TQFile::encodeName( infoPath ) );
        if ( dp )
        {
            struct dirent *ep;
            ep = readdir( dp );
            ep = readdir( dp ); // ignore '.' and '..' dirent
            ep = readdir( dp ); // look for third file
            closedir( dp );
            if ( ep != 0 ) {
                //kdDebug() << ep->d_name << " in " << infoPath << " -> not empty" << endl;
                return false; // not empty
            }
        }
    }
    return true;
}

void TrashImpl::fileAdded()
{
    m_config.setGroup( "Status" );
    m_config.writeEntry( "Empty", false );
    m_config.sync();
    // The apps showing the trash (e.g. kdesktop) will be notified
    // of this change when KDirNotify::FilesAdded("trash:/") is emitted,
    // which will be done by the job soon after this.
}

void TrashImpl::fileRemoved()
{
    if ( isEmpty() ) {
        m_config.setGroup( "Status" );
        m_config.writeEntry( "Empty", true );
        m_config.sync();
    }
    // The apps showing the trash (e.g. kdesktop) will be notified
    // of this change when KDirNotify::FilesRemoved(...) is emitted,
    // which will be done by the job soon after this.
}

int TrashImpl::findTrashDirectory( const TQString& origPath )
{
    kdDebug() << k_funcinfo << origPath << endl;
    // First check if same device as $HOME, then we use the home trash right away.
    KDE_struct_stat buff;
    if ( KDE_lstat( TQFile::encodeName( origPath ), &buff ) == 0
         && buff.st_dev == m_homeDevice )
        return 0;

    TQString mountPoint = TDEIO::findPathMountPoint( origPath );
    const TQString trashDir = trashForMountPoint( mountPoint, true );
    kdDebug() << "mountPoint=" << mountPoint << " trashDir=" << trashDir << endl;
    if ( trashDir.isEmpty() )
        return 0; // no trash available on partition
    int id = idForTrashDirectory( trashDir );
    if ( id > -1 ) {
        kdDebug() << " known with id " << id << endl;
        return id;
    }
    // new trash dir found, register it
    // but we need stability in the trash IDs, so that restoring or asking
    // for properties works even tdeio_trash gets killed because idle.
#if 0
    kdDebug() << k_funcinfo << "found " << trashDir << endl;
    m_trashDirectories.insert( ++m_lastId, trashDir );
    if ( !mountPoint.endsWith( "/" ) )
        mountPoint += '/';
    m_topDirectories.insert( m_lastId, mountPoint );
    return m_lastId;
#endif
    scanTrashDirectories();
    return idForTrashDirectory( trashDir );
}

void TrashImpl::scanTrashDirectories() const
{
    const KMountPoint::List lst = KMountPoint::currentMountPoints();
    for ( KMountPoint::List::ConstIterator it = lst.begin() ; it != lst.end() ; ++it ) {
        const TQCString str = (*it)->mountType().latin1();
        // Skip pseudo-filesystems, there's no chance we'll find a .Trash on them :)
        // ## Maybe we should also skip readonly filesystems
        if ( str != "proc" && str != "devfs" && str != "usbdevfs" &&
             str != "sysfs" && str != "devpts" && str != "subfs" /* #96259 */ &&
             str != "autofs" /* #101116 */ ) {
            TQString topdir = (*it)->mountPoint();
            TQString trashDir = trashForMountPoint( topdir, false );
            if ( !trashDir.isEmpty() ) {
                // OK, trashDir is a valid trash directory. Ensure it's registered.
                int trashId = idForTrashDirectory( trashDir );
                if ( trashId == -1 ) {
                    // new trash dir found, register it
                    m_trashDirectories.insert( ++m_lastId, trashDir );
                    kdDebug() << k_funcinfo << "found " << trashDir << " gave it id " << m_lastId << endl;
                    if ( !topdir.endsWith( "/" ) )
                        topdir += '/';
                    m_topDirectories.insert( m_lastId, topdir );
                }
            }
        }
    }
    m_trashDirectoriesScanned = true;
}

TrashImpl::TrashDirMap TrashImpl::trashDirectories() const
{
    if ( !m_trashDirectoriesScanned )
        scanTrashDirectories();
    return m_trashDirectories;
}

TrashImpl::TrashDirMap TrashImpl::topDirectories() const
{
    if ( !m_trashDirectoriesScanned )
        scanTrashDirectories();
    return m_topDirectories;
}

TQString TrashImpl::trashForMountPoint( const TQString& topdir, bool createIfNeeded ) const
{
    // (1) Administrator-created $topdir/.Trash directory

    const TQString rootTrashDir = topdir + "/.Trash";
    const TQCString rootTrashDir_c = TQFile::encodeName( rootTrashDir );
    // Can't use TQFileInfo here since we need to test for the sticky bit
    uid_t uid = getuid();
    KDE_struct_stat buff;
    const uint requiredBits = S_ISVTX; // Sticky bit required
    if ( KDE_lstat( rootTrashDir_c, &buff ) == 0 ) {
        if ( (S_ISDIR(buff.st_mode)) // must be a dir
             && (!S_ISLNK(buff.st_mode)) // not a symlink
             && ((buff.st_mode & requiredBits) == requiredBits)
             && (::access(rootTrashDir_c, W_OK))
            ) {
            const TQString trashDir = rootTrashDir + "/" + TQString::number( uid );
            const TQCString trashDir_c = TQFile::encodeName( trashDir );
            if ( KDE_lstat( trashDir_c, &buff ) == 0 ) {
                if ( (buff.st_uid == uid) // must be owned by user
                     && (S_ISDIR(buff.st_mode)) // must be a dir
                     && (!S_ISLNK(buff.st_mode)) // not a symlink
                     && (buff.st_mode & 0777) == 0700 ) { // rwx for user
                    return trashDir;
                }
                kdDebug() << "Directory " << trashDir << " exists but didn't pass the security checks, can't use it" << endl;
            }
            else if ( createIfNeeded && initTrashDirectory( trashDir_c ) ) {
                return trashDir;
            }
        } else {
            kdDebug() << "Root trash dir " << rootTrashDir << " exists but didn't pass the security checks, can't use it" << endl;
        }
    }

    // (2) $topdir/.Trash-$uid
    const TQString trashDir = topdir + "/.Trash-" + TQString::number( uid );
    const TQCString trashDir_c = TQFile::encodeName( trashDir );
    if ( KDE_lstat( trashDir_c, &buff ) == 0 )
    {
        if ( (buff.st_uid == uid) // must be owned by user
             && (S_ISDIR(buff.st_mode)) // must be a dir
             && (!S_ISLNK(buff.st_mode)) // not a symlink
             && ((buff.st_mode & 0777) == 0700) ) { // rwx for user, ------ for group and others

            if ( checkTrashSubdirs( trashDir_c ) )
            return trashDir;
        }
        kdDebug() << "Directory " << trashDir << " exists but didn't pass the security checks, can't use it" << endl;
        // Exists, but not useable
        return TQString::null;
    }
    if ( createIfNeeded && initTrashDirectory( trashDir_c ) ) {
        return trashDir;
    }
    return TQString::null;
}

int TrashImpl::idForTrashDirectory( const TQString& trashDir ) const
{
    // If this is too slow we can always use a reverse map...
    TrashDirMap::ConstIterator it = m_trashDirectories.begin();
    for ( ; it != m_trashDirectories.end() ; ++it ) {
        if ( it.data() == trashDir ) {
            return it.key();
        }
    }
    return -1;
}

bool TrashImpl::initTrashDirectory( const TQCString& trashDir_c ) const
{
    if ( ::mkdir( trashDir_c, 0700 ) != 0 )
        return false;
    // This trash dir will be useable only if the directory is owned by user.
    // In theory this is the case, but not on e.g. USB keys...
    uid_t uid = getuid();
    KDE_struct_stat buff;
    if ( KDE_lstat( trashDir_c, &buff ) != 0 )
        return false; // huh?
    if ( (buff.st_uid == uid) // must be owned by user
         && ((buff.st_mode & 0777) == 0700) ) { // rwx for user, --- for group and others

        return checkTrashSubdirs( trashDir_c );

    } else {
        kdDebug() << trashDir_c << " just created, by it doesn't have the right permissions, must be a FAT partition. Removing it again." << endl;
        // Not good, e.g. USB key. Delete again.
        // I'm paranoid, it would be better to find a solution that allows
        // to trash directly onto the USB key, but I don't see how that would
        // pass the security checks. It would also make the USB key appears as
        // empty when it's in fact full...
        ::rmdir( trashDir_c );
        return false;
    }
    return true;
}

bool TrashImpl::checkTrashSubdirs( const TQCString& trashDir_c ) const
{
    // testDir currently works with a TQString - ## optimize
    TQString trashDir = TQFile::decodeName( trashDir_c );
    const TQString info = trashDir + "/info";
    if ( testDir( info ) != 0 )
        return false;
    const TQString files = trashDir + "/files";
    if ( testDir( files ) != 0 )
        return false;
    return true;
}

TQString TrashImpl::trashDirectoryPath( int trashId ) const
{
    // Never scanned for trash dirs? (This can happen after killing tdeio_trash
    // and reusing a directory listing from the earlier instance.)
    if ( !m_trashDirectoriesScanned )
        scanTrashDirectories();
    Q_ASSERT( m_trashDirectories.contains( trashId ) );
    return m_trashDirectories[trashId];
}

TQString TrashImpl::topDirectoryPath( int trashId ) const
{
    if ( !m_trashDirectoriesScanned )
        scanTrashDirectories();
    assert( trashId != 0 );
    Q_ASSERT( m_topDirectories.contains( trashId ) );
    return m_topDirectories[trashId];
}

// Helper method. Creates a URL with the format trash:/trashid-fileid or
// trash:/trashid-fileid/relativePath/To/File for a file inside a trashed directory.
KURL TrashImpl::makeURL( int trashId, const TQString& fileId, const TQString& relativePath )
{
    KURL url;
    url.setProtocol( "trash" );
    TQString path = "/";
    path += TQString::number( trashId );
    path += '-';
    path += fileId;
    if ( !relativePath.isEmpty() ) {
        path += '/';
        path += relativePath;
    }
    url.setPath( path );
    return url;
}

// Helper method. Parses a trash URL with the URL scheme defined in makeURL.
// The trash:/ URL itself isn't parsed here, must be caught by the caller before hand.
bool TrashImpl::parseURL( const KURL& url, int& trashId, TQString& fileId, TQString& relativePath )
{
    if ( url.protocol() != "trash" )
        return false;
    const TQString path = url.path();
    int start = 0;
    if ( path[0] == '/' ) // always true I hope
        start = 1;
    int slashPos = path.find( '-', 0 ); // don't match leading slash
    if ( slashPos <= 0 )
        return false;
    bool ok = false;
    trashId = path.mid( start, slashPos - start ).toInt( &ok );
    Q_ASSERT( ok );
    if ( !ok )
        return false;
    start = slashPos + 1;
    slashPos = path.find( '/', start );
    if ( slashPos <= 0 ) {
        fileId = path.mid( start );
        relativePath = TQString::null;
        return true;
    }
    fileId = path.mid( start, slashPos - start );
    relativePath = path.mid( slashPos + 1 );
    return true;
}

bool TrashImpl::adaptTrashSize( const TQString& origPath, int trashId )
{
    TDEConfig config( "trashrc" );

    const TQString trashPath = trashDirectoryPath( trashId );
    config.setGroup( trashPath );

    bool useTimeLimit = config.readBoolEntry( "UseTimeLimit", false );
    bool useSizeLimit = config.readBoolEntry( "UseSizeLimit", true );
		int  sizeLimitType = config.readNumEntry( "SizeLimitType", TrashConstant::SIZE_LIMIT_PERCENT );
    double percent = config.readDoubleNumEntry( "Percent", 10 );
		double fixedSize = config.readDoubleNumEntry( "FixedSize", 500 );
		int fixedSizeUnit = config.readNumEntry( "FixedSizeUnit", TrashConstant::SIZE_ID_MB );
    int actionType = config.readNumEntry( "LimitReachedAction", TrashConstant::ACTION_WARNING );

    if ( useTimeLimit ) { // delete all files in trash older than X days
        const int maxDays = config.readNumEntry( "Days", 32000 );
        const TQDateTime currentDate = TQDateTime::currentDateTime();

        const TrashedFileInfoList trashedFiles = list();
        for ( uint i = 0; i < trashedFiles.count(); ++i ) {
            struct TrashedFileInfo info = trashedFiles[ i ];
            if ( info.trashId != trashId )
                continue;

            if ( info.deletionDate.daysTo( currentDate ) > maxDays )
              del( info.trashId, info.fileId );
        }
    }

    if ( useSizeLimit ) { // check if size limit exceeded
        // calculate size of the files to be put into the trash
        unsigned long additionalSize = DiscSpaceUtil::sizeOfPath( origPath );
        TQString trashPathName = trashPath + "/files/";
        DiscSpaceUtil util( trashPathName );
        unsigned long requiredTrashSpace = util.sizeOfPath(trashPathName) + additionalSize;
        unsigned long trashLimit = 0;
        if ( sizeLimitType == TrashConstant::SIZE_LIMIT_PERCENT)
        {
        	trashLimit = (unsigned long)(1024 * percent * util.size() / 100.0);
        }
        else if ( sizeLimitType == TrashConstant::SIZE_LIMIT_FIXED)
        {
        	double trashLimitTemp = fixedSize;
        	while (fixedSizeUnit > TrashConstant::SIZE_ID_B)
					{
						trashLimitTemp *= 1024;
						--fixedSizeUnit;
					}
	        trashLimit = (unsigned long)trashLimitTemp;
        }
        if ( additionalSize > trashLimit ) {
					m_lastErrorCode = TDEIO::ERR_SLAVE_DEFINED;
					m_lastErrorMessage = i18n( "The file '%1' is bigger than the '%2' trash bin size.\n"
					                           "It cannot be trashed." ).arg(origPath).arg(util.mountPoint());
					return false;
        } else if ( requiredTrashSpace > trashLimit ) {
            if ( actionType == TrashConstant::ACTION_WARNING ) { // warn the user only
                m_lastErrorCode = TDEIO::ERR_SLAVE_DEFINED;
                m_lastErrorMessage = i18n( "There is not enough space left in trash folder '%1'.\n"
                                           "The file cannot be trashed. Clean the trash manually and try again.")
                                           .arg(util.mountPoint());
                return false;
            } else {
                TQDir dir( trashPath + "/files" );
                const TQFileInfoList *infos = 0;
                if ( actionType == TrashConstant::ACTION_DELETE_OLDEST )  // delete oldest files first
                    infos = dir.entryInfoList( TQDir::Files | TQDir::Dirs, TQDir::Time | TQDir::Reversed );
                else if ( actionType == TrashConstant::ACTION_DELETE_BIGGEST ) // delete biggest files first
                    infos = dir.entryInfoList( TQDir::Files | TQDir::Dirs, TQDir::Size );
                else {
                    tqWarning( "<TrashImpl::adaptTrashSize> Should never happen!" );
                    return false;
                }

                TQFileInfoListIterator it( *infos );
                TQFileInfo *info;
                bool deleteFurther = true;
                while ( ((info = it.current()) != 0) && deleteFurther ) {
                    if ( info->fileName() != "." && info->fileName() != ".." ) {
                        del( trashId, info->fileName() ); // delete trashed file
                        if ( (util.sizeOfPath(trashPathName) + additionalSize) < trashLimit ) // check whether we have enough space now
                            deleteFurther = false;
                    }
                    ++it;
                }
            }
        }
    }

    return true;
}

void TrashImpl::resizeTrash(int trashId)
{
	TDEConfig config("trashrc");
	const TQString trashPath = trashDirectoryPath(trashId);
	config.setGroup(trashPath);

	bool useTimeLimit = config.readBoolEntry("UseTimeLimit", false);
	bool useSizeLimit = config.readBoolEntry("UseSizeLimit", true);
	int  sizeLimitType = config.readNumEntry("SizeLimitType", TrashConstant::SIZE_LIMIT_PERCENT);
	double percent = config.readDoubleNumEntry("Percent", 10);
	double fixedSize = config.readDoubleNumEntry("FixedSize", 500);
	int fixedSizeUnit = config.readNumEntry("FixedSizeUnit", TrashConstant::SIZE_ID_MB);
	int actionType = config.readNumEntry("LimitReachedAction", 0);

	if (useTimeLimit)
	{
		// delete all files in trash older than X days
		const int maxDays = config.readNumEntry("Days", 32000);
		const TQDateTime currentDate = TQDateTime::currentDateTime();
		const TrashedFileInfoList trashedFiles = list();
		for (uint i = 0; i < trashedFiles.count(); ++i)
		{
			struct TrashedFileInfo info = trashedFiles[ i ];
			if (info.trashId != trashId)
			{
				continue;
			}
			if (info.deletionDate.daysTo(currentDate) > maxDays)
			{
				del(info.trashId, info.fileId);
			}
		}
	}

	if (useSizeLimit)
	{
		// check if size limit exceeded
		TQString trashPathName = trashPath + "/files/";
		DiscSpaceUtil util(trashPathName);
		unsigned long currTrashSize = util.sizeOfPath(trashPathName);
		unsigned long trashLimit = 0;
		if (sizeLimitType == TrashConstant::SIZE_LIMIT_PERCENT)
		{
			trashLimit = (unsigned long)(1024 * percent * util.size() / 100.0);
		}
		else if (sizeLimitType == TrashConstant::SIZE_LIMIT_FIXED)
		{
			double trashLimitTemp = fixedSize;
			while (fixedSizeUnit > TrashConstant::SIZE_ID_B)
			{
				trashLimitTemp *= 1024;
				--fixedSizeUnit;
			}
			trashLimit = (unsigned long)trashLimitTemp;
		}
		if (currTrashSize > trashLimit)
		{
			if (actionType == TrashConstant::ACTION_WARNING)
			{
				// warn the user only
        KMessageBox::error(0, i18n("The current size of trash folder '%1' is bigger than the allowed size.\n"
																	 "Clean the trash manually.").arg(util.mountPoint()));
				return;
			}
			else
			{
				TQDir dir(trashPath + "/files");
				const TQFileInfoList *infos = 0;
				if (actionType == TrashConstant::ACTION_DELETE_OLDEST)
				{
					// delete oldest files first
					infos = dir.entryInfoList(TQDir::Files | TQDir::Dirs, TQDir::Time | TQDir::Reversed);
				}
				else if (actionType == TrashConstant::ACTION_DELETE_BIGGEST)
				{
					// delete biggest files first
					infos = dir.entryInfoList(TQDir::Files | TQDir::Dirs, TQDir::Size);
				}
				else
				{
					tqWarning("<TrashImpl::resizeTrash> Should never happen!");
					return;
				}

				TQFileInfoListIterator it(*infos);
				TQFileInfo *info;
				bool deleteFurther = true;
				while (((info = it.current()) != 0) && deleteFurther)
				{
					if (info->fileName() != "." && info->fileName() != "..")
					{
						del(trashId, info->fileName()); // delete trashed file
						if ((util.sizeOfPath(trashPathName)) < trashLimit)
						{
							// check whether we have enough space now
							deleteFurther = false;
						}
					}
					++it;
				}
			}
		}
	}
}

#include "trashimpl.moc"