summaryrefslogtreecommitdiffstats
path: root/kioslave/tar/tar.cc
blob: b55fd317e78df09951b6620cd20555641c466c89 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
#include <config.h>

#include <sys/types.h>
#ifdef HAVE_SYS_STAT_H
#include <sys/stat.h>
#endif
#include <stdlib.h>
#include <unistd.h>

#include <tqfile.h>

#include <kglobal.h>
#include <kurl.h>
#include <kdebug.h>
#include <kinstance.h>
#include <ktar.h>
#include <kzip.h>
#include <kar.h>
#include <kmimemagic.h>
#include <klocale.h>
#include <kde_file.h>
#include <kio/global.h>
#include <kremoteencoding.h>

#include <errno.h> // to be removed

#include "tar.h"

using namespace KIO;

extern "C" { int KDE_EXPORT kdemain(int argc, char **argv); }

int kdemain( int argc, char **argv )
{
  KInstance instance( "kio_tar" );

  kdDebug(7109) << "Starting " << getpid() << endl;

  if (argc != 4)
  {
     fprintf(stderr, "Usage: kio_tar protocol domain-socket1 domain-socket2\n");
     exit(-1);
  }

  ArchiveProtocol slave(argv[2], argv[3]);
  slave.dispatchLoop();

  kdDebug(7109) << "Done" << endl;
  return 0;
}

ArchiveProtocol::ArchiveProtocol( const TQCString &pool, const TQCString &app ) : SlaveBase( "tar", pool, app )
{
  kdDebug( 7109 ) << "ArchiveProtocol::ArchiveProtocol" << endl;
  m_archiveFile = 0L;
}

ArchiveProtocol::~ArchiveProtocol()
{
    delete m_archiveFile;
}

bool ArchiveProtocol::checkNewFile( const KURL & url, TQString & path, KIO::Error& errorNum )
{
    TQString fullPath = url.path();
    kdDebug(7109) << "ArchiveProtocol::checkNewFile " << fullPath << endl;


    // Are we already looking at that file ?
    if ( m_archiveFile && m_archiveName == fullPath.left(m_archiveName.length()) )
    {
        // Has it changed ?
        KDE_struct_stat statbuf;
        if ( KDE_stat( TQFile::encodeName( m_archiveName ), &statbuf ) == 0 )
        {
            if ( m_mtime == statbuf.st_mtime )
            {
                path = fullPath.mid( m_archiveName.length() );
                kdDebug(7109) << "ArchiveProtocol::checkNewFile returning " << path << endl;
                return true;
            }
        }
    }
    kdDebug(7109) << "Need to open a new file" << endl;

    // Close previous file
    if ( m_archiveFile )
    {
        m_archiveFile->close();
        delete m_archiveFile;
        m_archiveFile = 0L;
    }

    // Find where the tar file is in the full path
    int pos = 0;
    TQString archiveFile;
    path = TQString::null;

    int len = fullPath.length();
    if ( len != 0 && fullPath[ len - 1 ] != '/' )
        fullPath += '/';

    kdDebug(7109) << "the full path is " << fullPath << endl;
    KDE_struct_stat statbuf;
    statbuf.st_mode = 0; // be sure to clear the directory bit
    while ( (pos=fullPath.tqfind( '/', pos+1 )) != -1 )
    {
        TQString tryPath = fullPath.left( pos );
        kdDebug(7109) << fullPath << "  trying " << tryPath << endl;
        if ( KDE_stat( TQFile::encodeName(tryPath), &statbuf ) == -1 )
        {
            // We are not in the file system anymore, either we have already enough data or we will never get any useful data anymore
            break;
        }
        if ( !S_ISDIR(statbuf.st_mode) )
        {
            archiveFile = tryPath;
            m_mtime = statbuf.st_mtime;
            path = fullPath.mid( pos + 1 );
            kdDebug(7109) << "fullPath=" << fullPath << " path=" << path << endl;
            len = path.length();
            if ( len > 1 )
            {
                if ( path[ len - 1 ] == '/' )
                    path.truncate( len - 1 );
            }
            else
                path = TQString::tqfromLatin1("/");
            kdDebug(7109) << "Found. archiveFile=" << archiveFile << " path=" << path << endl;
            break;
        }
    }
    if ( archiveFile.isEmpty() )
    {
        kdDebug(7109) << "ArchiveProtocol::checkNewFile: not found" << endl;
        if ( S_ISDIR(statbuf.st_mode) ) // Was the last stat about a directory?
        {
            // Too bad, it is a directory, not an archive.
            kdDebug(7109) << "Path is a directory, not an archive." << endl;
            errorNum = KIO::ERR_IS_DIRECTORY;
        }
        else
            errorNum = KIO::ERR_DOES_NOT_EXIST;
        return false;
    }

    // Open new file
    if ( url.protocol() == "tar" ) {
        kdDebug(7109) << "Opening KTar on " << archiveFile << endl;
        m_archiveFile = new KTar( archiveFile );
    } else if ( url.protocol() == "ar" ) {
        kdDebug(7109) << "Opening KAr on " << archiveFile << endl;
        m_archiveFile = new KAr( archiveFile );
    } else if ( url.protocol() == "zip" ) {
        kdDebug(7109) << "Opening KZip on " << archiveFile << endl;
        m_archiveFile = new KZip( archiveFile );
    } else {
        kdWarning(7109) << "Protocol " << url.protocol() << " not supported by this IOSlave" << endl;
        errorNum = KIO::ERR_UNSUPPORTED_PROTOCOL;
        return false;
    }

    if ( !m_archiveFile->open( IO_ReadOnly ) )
    {
        kdDebug(7109) << "Opening " << archiveFile << "failed." << endl;
        delete m_archiveFile;
        m_archiveFile = 0L;
        errorNum = KIO::ERR_CANNOT_OPEN_FOR_READING;
        return false;
    }

    m_archiveName = archiveFile;
    return true;
}


void ArchiveProtocol::createUDSEntry( const KArchiveEntry * archiveEntry, UDSEntry & entry )
{
    UDSAtom atom;
    entry.clear();
    atom.m_uds = UDS_NAME;
    atom.m_str = remoteEncoding()->decode(archiveEntry->name().local8Bit());
    entry.append(atom);

    atom.m_uds = UDS_FILE_TYPE;
    atom.m_long = archiveEntry->permissions() & S_IFMT; // keep file type only
    entry.append( atom );

    atom.m_uds = UDS_SIZE;
    atom.m_long = archiveEntry->isFile() ? ((KArchiveFile *)archiveEntry)->size() : 0L ;
    entry.append( atom );

    atom.m_uds = UDS_MODIFICATION_TIME;
    atom.m_long = archiveEntry->date();
    entry.append( atom );

    atom.m_uds = UDS_ACCESS;
    atom.m_long = archiveEntry->permissions() & 07777; // keep permissions only
    entry.append( atom );

    atom.m_uds = UDS_USER;
    atom.m_str = remoteEncoding()->decode(archiveEntry->user().local8Bit());
    entry.append( atom );

    atom.m_uds = UDS_GROUP;
    atom.m_str = remoteEncoding()->decode(archiveEntry->group().local8Bit());
    entry.append( atom );

    atom.m_uds = UDS_LINK_DEST;
    atom.m_str = remoteEncoding()->decode(archiveEntry->symlink().local8Bit());
    entry.append( atom );
}

void ArchiveProtocol::listDir( const KURL & url )
{
    kdDebug( 7109 ) << "ArchiveProtocol::listDir " << url << endl;

    TQString path;
    KIO::Error errorNum;
    if ( !checkNewFile( url, path, errorNum ) )
    {
        if ( errorNum == KIO::ERR_CANNOT_OPEN_FOR_READING )
        {
            // If we cannot open, it might be a problem with the archive header (e.g. unsupported format)
            // Therefore give a more specific error message
            error( KIO::ERR_SLAVE_DEFINED,
                   i18n( "Could not open the file, probably due to an unsupported file format.\n%1")
                           .arg( url.prettyURL() ) );
            return;
        }
        else if ( errorNum != ERR_IS_DIRECTORY )
        {
            // We have any other error
            error( errorNum, url.prettyURL() );
            return;
        }
        // It's a real dir -> redirect
        KURL redir;
        redir.setPath( url.path() );
        kdDebug( 7109 ) << "Ok, redirection to " << redir.url() << endl;
        redirection( redir );
        finished();
        // And let go of the tar file - for people who want to unmount a cdrom after that
        delete m_archiveFile;
        m_archiveFile = 0L;
        return;
    }

    if ( path.isEmpty() )
    {
        KURL redir( url.protocol() + TQString::tqfromLatin1( ":/") );
        kdDebug( 7109 ) << "url.path()==" << url.path() << endl;
        redir.setPath( url.path() + TQString::tqfromLatin1("/") );
        kdDebug( 7109 ) << "ArchiveProtocol::listDir: redirection " << redir.url() << endl;
        redirection( redir );
        finished();
        return;
    }

    path = TQString::fromLocal8Bit(remoteEncoding()->encode(path));

    kdDebug( 7109 ) << "checkNewFile done" << endl;
    const KArchiveDirectory* root = m_archiveFile->directory();
    const KArchiveDirectory* dir;
    if (!path.isEmpty() && path != "/")
    {
        kdDebug(7109) << TQString(TQString("Looking for entry %1").arg(path)) << endl;
        const KArchiveEntry* e = root->entry( path );
        if ( !e )
        {
            error( KIO::ERR_DOES_NOT_EXIST, url.prettyURL() );
            return;
        }
        if ( ! e->isDirectory() )
        {
            error( KIO::ERR_IS_FILE, url.prettyURL() );
            return;
        }
        dir = (KArchiveDirectory*)e;
    } else {
        dir = root;
    }

    TQStringList l = dir->entries();
    totalSize( l.count() );

    UDSEntry entry;
    TQStringList::Iterator it = l.begin();
    for( ; it != l.end(); ++it )
    {
        kdDebug(7109) << (*it) << endl;
        const KArchiveEntry* archiveEntry = dir->entry( (*it) );

        createUDSEntry( archiveEntry, entry );

        listEntry( entry, false );
    }

    listEntry( entry, true ); // ready

    finished();

    kdDebug( 7109 ) << "ArchiveProtocol::listDir done" << endl;
}

void ArchiveProtocol::stat( const KURL & url )
{
    TQString path;
    UDSEntry entry;
    KIO::Error errorNum;
    if ( !checkNewFile( url, path, errorNum ) )
    {
        // We may be looking at a real directory - this happens
        // when pressing up after being in the root of an archive
        if ( errorNum == KIO::ERR_CANNOT_OPEN_FOR_READING )
        {
            // If we cannot open, it might be a problem with the archive header (e.g. unsupported format)
            // Therefore give a more specific error message
            error( KIO::ERR_SLAVE_DEFINED,
                   i18n( "Could not open the file, probably due to an unsupported file format.\n%1")
                           .arg( url.prettyURL() ) );
            return;
        }
        else if ( errorNum != ERR_IS_DIRECTORY )
        {
            // We have any other error
            error( errorNum, url.prettyURL() );
            return;
        }
        // Real directory. Return just enough information for KRun to work
        UDSAtom atom;
        atom.m_uds = KIO::UDS_NAME;
        atom.m_str = url.fileName();
        entry.append( atom );
        kdDebug( 7109 ) << "ArchiveProtocol::stat returning name=" << url.fileName() << endl;

        KDE_struct_stat buff;
        if ( KDE_stat( TQFile::encodeName( url.path() ), &buff ) == -1 )
        {
            // Should not happen, as the file was already stated by checkNewFile
            error( KIO::ERR_COULD_NOT_STAT, url.prettyURL() );
            return;
        }

        atom.m_uds = KIO::UDS_FILE_TYPE;
        atom.m_long = buff.st_mode & S_IFMT;
        entry.append( atom );

        statEntry( entry );

        finished();

        // And let go of the tar file - for people who want to unmount a cdrom after that
        delete m_archiveFile;
        m_archiveFile = 0L;
        return;
    }

    const KArchiveDirectory* root = m_archiveFile->directory();
    const KArchiveEntry* archiveEntry;
    if ( path.isEmpty() )
    {
        path = TQString::tqfromLatin1( "/" );
        archiveEntry = root;
    } else {
        path = TQString::fromLocal8Bit(remoteEncoding()->encode(path));
        archiveEntry = root->entry( path );
    }
    if ( !archiveEntry )
    {
        error( KIO::ERR_DOES_NOT_EXIST, url.prettyURL() );
        return;
    }

    createUDSEntry( archiveEntry, entry );
    statEntry( entry );

    finished();
}

void ArchiveProtocol::get( const KURL & url )
{
    kdDebug( 7109 ) << "ArchiveProtocol::get " << url << endl;

    TQString path;
    KIO::Error errorNum;
    if ( !checkNewFile( url, path, errorNum ) )
    {
        if ( errorNum == KIO::ERR_CANNOT_OPEN_FOR_READING )
        {
            // If we cannot open, it might be a problem with the archive header (e.g. unsupported format)
            // Therefore give a more specific error message
            error( KIO::ERR_SLAVE_DEFINED,
                   i18n( "Could not open the file, probably due to an unsupported file format.\n%1")
                           .arg( url.prettyURL() ) );
            return;
        }
        else
        {
            // We have any other error
            error( errorNum, url.prettyURL() );
            return;
        }
    }

    path = TQString::fromLocal8Bit(remoteEncoding()->encode(path));

    const KArchiveDirectory* root = m_archiveFile->directory();
    const KArchiveEntry* archiveEntry = root->entry( path );

    if ( !archiveEntry )
    {
        error( KIO::ERR_DOES_NOT_EXIST, url.prettyURL() );
        return;
    }
    if ( archiveEntry->isDirectory() )
    {
        error( KIO::ERR_IS_DIRECTORY, url.prettyURL() );
        return;
    }
    const KArchiveFile* archiveFileEntry = static_cast<const KArchiveFile *>(archiveEntry);
    if ( !archiveEntry->symlink().isEmpty() )
    {
      kdDebug(7109) << "Redirection to " << archiveEntry->symlink() << endl;
      KURL realURL;
      if (archiveEntry->symlink().startsWith("/")) { // absolute path
          realURL.setPath(archiveEntry->symlink() ); // goes out of tar:/, back into file:
      } else {
          realURL = KURL( url, archiveEntry->symlink() );
      }
      kdDebug(7109) << "realURL= " << realURL << endl;
      redirection( realURL );
      finished();
      return;
    }

    //kdDebug(7109) << "Preparing to get the archive data" << endl;
    
    /*
     * The easy way would be to get the data by calling archiveFileEntry->data()
     * However this has drawbacks:
     * - the complete file must be read into the memory
     * - errors are skipped, resulting in an empty file
     */

    TQIODevice* io = 0;
    // Getting the device is hard, as archiveFileEntry->device() is not virtual!
    if ( url.protocol() == "tar" )
    {
        io = archiveFileEntry->device();
    }
    else if ( url.protocol() == "ar" )
    {
        io = archiveFileEntry->device();
    }
    else if ( url.protocol() == "zip" )
    {
        io = ((KZipFileEntry*) archiveFileEntry)->device();
    }
    else
    {
        // Wrong protocol? Why was this not catched by checkNewFile?
        kdWarning(7109) << "Protocol " << url.protocol() << " not supported by this IOSlave; " << k_funcinfo << endl;
        error( KIO::ERR_UNSUPPORTED_PROTOCOL, url.protocol() );
        return;
    }

    if (!io)
    {
        error( KIO::ERR_SLAVE_DEFINED,
            i18n( "The archive file could not be opened, perhaps because the format is unsupported.\n%1" )
                    .arg( url.prettyURL() ) );
        return;
    }
    
    if ( !io->open( IO_ReadOnly ) )
    {
        error( KIO::ERR_CANNOT_OPEN_FOR_READING, url.prettyURL() );
        return;
    }
    
    totalSize( archiveFileEntry->size() );

    // Size of a TQIODevice read. It must be large enough so that the mime type check will not fail
    const int maxSize = 0x100000; // 1MB
    
    int bufferSize = kMin( maxSize, archiveFileEntry->size() );
    TQByteArray buffer ( bufferSize );
    if ( buffer.isEmpty() && bufferSize > 0 )
    {
        // Something went wrong
        error( KIO::ERR_OUT_OF_MEMORY, url.prettyURL() );
        return;
    }

    bool firstRead = true;

    // How much file do we still have to process?
    int fileSize = archiveFileEntry->size();
    KIO::filesize_t processed = 0;

    while ( !io->atEnd() && fileSize > 0 )
    {
        if ( !firstRead )
        {
            bufferSize = kMin( maxSize, fileSize );
            buffer.tqresize( bufferSize, TQGArray::SpeedOptim );
        }
        const TQ_LONG read = io->readBlock( buffer.data(), buffer.size() ); // Avoid to use bufferSize here, in case something went wrong.
        if ( read != bufferSize )
        {
            kdWarning(7109) << "Read " << read << " bytes but expected " << bufferSize << endl;
            error( KIO::ERR_COULD_NOT_READ, url.prettyURL() );
            return;
        }
        if ( firstRead )
        {
            // We use the magic one the first data read
            // (As magic detection is about fixed positions, we can be sure that it is enough data.)
            KMimeMagicResult * result = KMimeMagic::self()->findBufferFileType( buffer, path );
            kdDebug(7109) << "Emitting mimetype " << result->mimeType() << endl;
            mimeType( result->mimeType() );
            firstRead = false;
        }
        data( buffer );
        processed += read;
        processedSize( processed );
        fileSize -= bufferSize;
    }
    io->close();
    delete io;

    data( TQByteArray() );

    finished();
}

/*
  In case someone wonders how the old filter stuff looked like :    :)
void TARProtocol::slotData(void *_p, int _len)
{
  switch (m_cmd) {
    case CMD_PUT:
      assert(m_pFilter);
      m_pFilter->send(_p, _len);
      break;
    default:
      abort();
      break;
    }
}

void TARProtocol::slotDataEnd()
{
  switch (m_cmd) {
    case CMD_PUT:
      assert(m_pFilter && m_pJob);
      m_pFilter->finish();
      m_pJob->dataEnd();
      m_cmd = CMD_NONE;
      break;
    default:
      abort();
      break;
    }
}

void TARProtocol::jobData(void *_p, int _len)
{
  switch (m_cmd) {
  case CMD_GET:
    assert(m_pFilter);
    m_pFilter->send(_p, _len);
    break;
  case CMD_COPY:
    assert(m_pFilter);
    m_pFilter->send(_p, _len);
    break;
  default:
    abort();
  }
}

void TARProtocol::jobDataEnd()
{
  switch (m_cmd) {
  case CMD_GET:
    assert(m_pFilter);
    m_pFilter->finish();
    dataEnd();
    break;
  case CMD_COPY:
    assert(m_pFilter);
    m_pFilter->finish();
    m_pJob->dataEnd();
    break;
  default:
    abort();
  }
}

void TARProtocol::filterData(void *_p, int _len)
{
debug("void TARProtocol::filterData");
  switch (m_cmd) {
  case CMD_GET:
    data(_p, _len);
    break;
  case CMD_PUT:
    assert (m_pJob);
    m_pJob->data(_p, _len);
    break;
  case CMD_COPY:
    assert(m_pJob);
    m_pJob->data(_p, _len);
    break;
  default:
    abort();
  }
}
*/

// kate: space-indent on; indent-width 4; replace-tabs on;