aboutsummaryrefslogtreecommitdiff
path: root/lib/dokuwiki/inc/TarLib.class.php
blob: ab802163b2f88ed842e9f5c7340595203e09514f (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
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
<?php
/**
 * TAR format class - Creates TAR archives
 *
 * This class is part or the MaxgComp suite and originally named
 * MaxgTar class.
 *
 * Modified for Dokuwiki
 *
 * @license GPL
 * @link    http://docs.maxg.info
 * @author  Bouchon <tarlib@bouchon.org> (Maxg)
 * @author  Christopher Smith <chris@jalakai.co.uk>
 */


/**
 * Those constants represent the compression method to use.
 * COMPRESS_GZIP is used for the GZIP compression; COMPRESS_BZIP for
 * BZIP2 and COMPRESS_NONE for no compression.
 *
 * On the other hand, COMPRESS_AUTO is a bit harder. It will first check
 * if the zlib extensions are loaded.
 * If it is, GZIP will be used. Else it will check if the bz2 extensions
 * are loaded. If it is, BZIP2 will be used. Else no compression will be
 * performed.
 *
 * You can then use getCompression() to know the compression chosen.
 *
 * If you selected a compression which can't be used (i.e extension not
 * present), it will be just disabled, and won't produce any error !
 * As a consequence, getCompression() will return COMPRESS_NONE
 *
 * ARCHIVE_DYNAMIC can be passed as the first argument of the constructor, to
 * create an archive in memory instead of a file. See also: MaxgTar(),
 * getDynamicArchive() and writeArchive()
 *
 * ARCHIVE_RENAMECOMP is a flag that can be multiplied by the compression method
 * (i.e COMPRESS_AUTO * ARCHIVE_RENAMECOMP). This will add the correct extension
 * to the archive name, which is useful with COMPRESS_AUTO, ie .bz2 if you gave
 * COMPRESS_BZIP. See also getCompression(TRUE) which does exactly the
 * same
 *
 * COMPRESS_DETECT does exactly the opposite and try to detect the
 * compression to use to read the archive depending on its extension. (i.e if
 * the archive ends with .tar.gz TarLib will try to decompress it with
 * GZIP). See also setCompression()
 *
 * FULL_ARCHIVE is a -1 constant that means "the complete archive" when
 * extracting. This is explained in Extract()
 */
define('COMPRESS_GZIP',1);
define('COMPRESS_BZIP',2);
define('COMPRESS_AUTO',3);
define('COMPRESS_NONE',0);
define('TARLIB_VERSION','1.2');
define('FULL_ARCHIVE',-1);
define('ARCHIVE_DYNAMIC',0);
define('ARCHIVE_RENAMECOMP',5);
define('COMPRESS_DETECT',-1);

class TarLib
{
  var $_comptype;
  var $_compzlevel;
  var $_fp;
  var $_memdat;
  var $_nomf;
  var $_result;
  var $_initerror;

  /**
   * constructor, initialize the class
   *
   * The constructor initialize the variables and prepare the class for the
   * archive, and return the object created. Note that you can use multiple
   * instances of the MaxgTar class, if you call this function another time and
   * store the object in an other variable.
   *
   * In fact, MaxgTar accepts the following arguments (all are optional) :
   *
   * filename can be either a file name (absolute or relative). In this
   * case, it can be used both for reading and writing. You can also open
   * remote archive if you add a protocole name at the beginning of the file
   * (ie https://host.dom/archive.tar.gz), but for reading only and if the
   * directive allow_url_fopen is enabled in PHP.INI (this can be checked with
   * TarInfo()). If you pass a file that doesn't exist, the script
   * will try to create it. If the archive already exists and contains files,
   * you can use Add() to append files.But by default this parameter
   * is ARCHIVE_DYNAMIC (write only) so the archive is created in memory and
   * can be sent to a file [writeArchive()] or to the client
   * [sendClient()]
   *
   * compression_type should be a constant that represents a type of
   * compression, or its integer value. The different values are described in
   * the constants.
   *
   * compression_level is an integer between 1 and 9 (by default) an
   * represent the GZIP or BZIP compression level.  1 produce fast compression,
   * and 9 produce smaller files. See the RFC 1952 for more infos.
   */
  function tarlib($p_filen = ARCHIVE_DYNAMIC , $p_comptype = COMPRESS_AUTO, $p_complevel = 9)
  {
    $this->_initerror = 0;
    $this->_nomf = $p_filen; $flag=0;
    if($p_comptype && $p_comptype % 5 == 0){$p_comptype /= ARCHIVE_RENAMECOMP; $flag=1;}

    if($p_complevel > 0 && $p_complevel <= 9) $this->_compzlevel = $p_complevel;
    else $p_complevel = 9;

    if($p_comptype == COMPRESS_DETECT)
    {
      if(strtolower(substr($p_filen,-3)) == '.gz') $p_comptype = COMPRESS_GZIP;
      elseif(strtolower(substr($p_filen,-4)) == '.bz2') $p_comptype = COMPRESS_BZIP;
      else $p_comptype = COMPRESS_NONE;
    }

    switch($p_comptype)
    {
      case COMPRESS_GZIP:
        if(!extension_loaded('zlib')) $this->_initerror = -1;
        $this->_comptype = COMPRESS_GZIP;
      break;

      case COMPRESS_BZIP:
        if(!extension_loaded('bz2')) $this->_inierror = -2;
        $this->_comptype = COMPRESS_BZIP;
      break;

      case COMPRESS_AUTO:
        if(extension_loaded('zlib'))
          $this->_comptype = COMPRESS_GZIP;
        elseif(extension_loaded('bz2'))
          $this->_comptype = COMPRESS_BZIP;
        else
          $this->_comptype = COMPRESS_NONE;
      break;

      default:
        $this->_comptype = COMPRESS_NONE;
    }

    if($this->_init_error < 0) $this->_comptype = COMPRESS_NONE;

    if($flag) $this->_nomf.= '.'.$this->getCompression(1);
    $this->_result = true;
  }

  /**
   * Recycle a TAR object.
   *
   * This function does exactly the same as TarLib (constructor), except it
   * returns a status code.
   */
  function setArchive($p_name='', $p_comp = COMPRESS_AUTO, $p_level=9)
  {
    $this->_CompTar();
    $this->TarLib($p_name, $p_comp, $p_level);
    return $this->_result;
  }

  /**
   * Get the compression used to generate the archive
   *
   * This is a very useful function when you're using dynamical archives.
   * Besides, if you let the script chose which compression to use, you'll have
   * a problem when you'll want to send it to the client if you don't know
   * which compression was used.
   *
   * There are two ways to call this function : if you call it without argument
   * or with FALSE, it will return the compression constants, explained on the
   * MaxgTar Constants.  If you call it with GetExtension on TRUE it will
   * return the extension without starting dot (ie "tar" or "tar.bz2" or
   * "tar.gz")
   *
   * NOTE: This can be done with the flag ARCHIVE_RENAMECOMP, see the
   * MaxgTar Constants
   */
  function getCompression($ext = false)
  {
    $exts = Array('tar','tar.gz','tar.bz2');
    if($ext) return $exts[$this->_comptype];
    return $this->_comptype;
  }

  /**
   * Change the compression mode.
   *
   * This function will change the compression methode to read or write
   * the archive. See the MaxgTar Constants to see which constants you can use.
   * It may look strange, but it returns the GZIP compression level.
   */
  function setCompression($p_comp = COMPRESS_AUTO)
  {
    $this->setArchive($this->_nomf, $p_comp, $this->_compzlevel);
    return $this->_compzlevel;
  }

  /**
   * Returns the compressed dynamic archive.
   *
   * When you're working with dynamic archives, use this function to grab
   * the final compressed archive in a string ready to be put in a SQL table or
   * in a file.
   */
  function getDynamicArchive()
  {
    return $this->_encode($this->_memdat);
  }

  /**
   * Write a dynamical archive into a file
   *
   * This function attempts to write a dynamicaly-genrated archive into
   * TargetFile on the webserver.  It returns a TarErrorStr() status
   * code.
   *
   * To know the extension to add to the file if you're using AUTO_DETECT
   * compression, you can use getCompression().
   */
  function writeArchive($p_archive) {
    if(!$this->_memdat) return -7;
    $fp = @fopen($p_archive, 'wb');
    if(!$fp) return -6;

    fwrite($fp, $this->_memdat);
    fclose($fp);

    return true;
  }

  /**
   * Send a TAR archive to the client browser.
   *
   * This function will send an archive to the client, and return a status
   * code, but can behave differently depending on the arguments you give. All
   * arguments are optional.
   *
   * ClientName is used to specify the archive name to give to the browser. If
   * you don't give one, it will send the constructor filename or return an
   * error code in case of dynamical archive.
   *
   * FileName is optional and used to send a specific archive. Leave it blank
   * to send dynamical archives or the current working archive.
   *
   * If SendHeaders is enabled (by default), the library will send the HTTP
   * headers itself before it sends the contents. This headers are :
   * Content-Type, Content-Disposition, Content-Length and Accept-Range.
   *
   * Please note that this function DOES NOT stops the script so don't forget
   * to exit() to avoid your script sending other data and corrupt the archive.
   * Another note : for AUTO_DETECT dynamical archives you can know the
   * extension to add to the name with getCompression()
   */
  function sendClient($name = '', $archive = '', $headers = true)
  {
    if(!$name && !$this->_nomf) return -9;
    if(!$archive && !$this->_memdat) return -10;
    if(!$name) $name = basename($this->_nomf);

    if($archive){ if(!file_exists($archive)) return -11; }
    else $decoded = $this->getDynamicArchive();

    if($headers)
    {
      header('Content-Type: application/x-gtar');
      header('Content-Disposition: attachment; filename='.basename($name));
      header('Accept-Ranges: bytes');
      header('Content-Length: '.($archive ? filesize($archive) : strlen($decoded)));
    }

    if($archive)
    {
      $fp = @fopen($archive,'rb');
      if(!$fp) return -4;

      while(!feof($fp)) echo fread($fp,2048);
    }
    else
    {
      echo $decoded;
    }

    return true;
  }

  /**
   * Extract part or totality of the archive.
   *
   * This function can extract files from an archive, and returns then a
   * status codes that can be converted with TarErrorStr() into a
   * human readable message.
   *
   * Only the first argument is required, What and it can be either the
   * constant FULL_ARCHIVE or an indexed array containing each file you want to
   * extract.
   *
   * To contains the target folder to extract the archive. It is optional and
   * the default value is '.' which means the current folder. If the target
   * folder doesn't exist, the script attempts to create it and give it
   * permissions 0777 by default.
   *
   * RemovePath is very usefull when you want to extract files from a subfoler
   * in the archive to a root folder. For instance, if you have a file in the
   * archive called some/sub/folder/test.txt and you want to extract it to the
   * script folder, you can call Extract with To = '.' and RemovePath =
   * 'some/sub/folder/'
   *
   * FileMode is optional and its default value is 0755. It is in fact the UNIX
   * permission in octal mode (prefixed with a 0) that will be given on each
   * extracted file.
   */
  function Extract($p_what = FULL_ARCHIVE, $p_to = '.', $p_remdir='', $p_mode = 0755)
  {
    if(!$this->_OpenRead()) return -4;
//  if(!@is_dir($p_to)) if(!@mkdir($p_to, 0777)) return -8;   --CS
    if(!@is_dir($p_to)) if(!$this->_dirApp($p_to)) return -8;   //--CS (route through correct dir fn)

    $ok = $this->_extractList($p_to, $p_what, $p_remdir, $p_mode);
    $this->_CompTar();

    return $ok;
  }

  /**
   * Create a new package with the given files
   *
   * This function will attempt to create a new archive with global headers
   * then add the given files into.  If the archive is a real file, the
   * contents are written directly into the file, if it is a dynamic archive
   * contents are only stored in memory. This function should not be used to
   * add files to an existing archive, you should use Add() instead.
   *
   * The FileList actually supports three different modes :
   *
   * - You can pass a string containing filenames separated by pipes '|'.
   *   In this case the file are read from the webserver filesystem and the
   *   root folder is the folder where the script using the MaxgTar is called.
   *
   * - You can also give a unidimensional indexed array containing the
   *   filenames. The behaviour for the content reading is the same that a
   *   '|'ed string.
   *
   * - The more useful usage is to pass bidimensional arrays, where the
   *   first element contains the filename and the second contains the file
   *   contents. You can even add empty folders to the package if the filename
   *   has a leading '/'. Once again, have a look at the exemples to understand
   *   better.
   *
   * Note you can also give arrays with both dynamic contents and static files.
   *
   * The optional parameter RemovePath can be used to delete a part of the tree
   * of the filename you're adding, for instance if you're adding in the root
   * of a package a file that is stored somewhere in the server tree.
   *
   * On the contrary the parameter AddPath can be used to add a prefix folder
   * to the file you store. Note also that the RemovePath is applied before the
   * AddPath is added, so it HAS a sense to use both parameters together.
   */
  function Create($p_filelist,$p_add='',$p_rem='')
  {
    if(!$fl = $this->_fetchFilelist($p_filelist)) return -5;
    if(!$this->_OpenWrite()) return -6;

    $ok = $this->_addFileList($fl,$p_add,$p_rem);

    if($ok) $this->_writeFooter();
    else{ $this->_CompTar(); @unlink($this->_nomf); }

    return $ok;
  }

  /**
   * Add files to an existing package.
   *
   * This function does exactly the same than Create() exept it
   * will append the given files at the end of the archive.  Please not the is
   * safe to call Add() on a newly created archive whereas the
   * contrary will fail !
   *
   * This function returns a status code, you can use TarErrorStr() on
   * it to get the human-readable description of the error.
   */
  function Add($p_filelist, $p_add = '', $p_rem = '') { if (($this->_nomf
!= ARCHIVE_DYNAMIC && @is_file($this->_nomf)) || ($this->_nomf ==
ARCHIVE_DYNAMIC && !$this->_memdat)) return $this->Create($p_filelist,
$p_add, $p_rem);

    if(!$fl = $this->_fetchFilelist($p_filelist)) return -5;
    return $this->_append($fl, $p_add, $p_rem);
  }

  /**
   * Read the contents of a TAR archive
   *
   * This function attempts to get the list of the files stored in the
   * archive, and return either an error code or an indexed array of
   * associative array containing for each file the following informations :
   *
   * checksum    Tar Checksum of the file
   * filename    The full name of the stored file (up to 100 c.)
   * mode        UNIX permissions in DECIMAL, not octal
   * uid         The Owner ID
   * gid         The Group ID
   * size        Uncompressed filesize
   * mtime       Timestamp of last modification
   * typeflag    Empty for files, set for folders
   * link        For the links, did you guess it ?
   * uname       Owner name
   * gname       Group name
   */
  function ListContents()
  {
    if(!$this->_nomf) return -3;
    if(!$this->_OpenRead()) return -4;

    $result = Array();

    while ($dat = $this->_read(512))
    {
      $dat = $this->_readHeader($dat);
      if(!is_array($dat)) continue;

      $this->_seek(ceil($dat['size']/512)*512,1);
      $result[] = $dat;
    }

    return  $result;
  }

  /**
   * Convert a status code into a human readable message
   *
   * Some MaxgTar functions like Create(), Add() ... return numerical
   * status code.  You can pass them to this function to grab their english
   * equivalent.
   */
  function TarErrorStr($i)
  {
    $ecodes = Array(
         1 => true,
         0 => "Undocumented error",
        -1 => "Can't use COMPRESS_GZIP compression : ZLIB extensions are not loaded !",
        -2 => "Can't use COMPRESS_BZIP compression : BZ2 extensions are not loaded !",
        -3 => "You must set a archive file to read the contents !",
        -4 => "Can't open the archive file for read !",
        -5 => "Invalide file list !",
        -6 => "Can't open the archive in write mode !",
        -7 => "There is no ARCHIVE_DYNAMIC to write !",
        -8 => "Can't create the directory to extract files !",
        -9 => "Please pass a archive name to send if you made created an ARCHIVE_DYNAMIC !",
       -10 => "You didn't pass an archive filename and there is no stored ARCHIVE_DYNAMIC !",
       -11 => "Given archive doesn't exist !"
    );

    return isset($ecodes[$i]) ? $ecodes[$i] : $ecodes[0];
  }

  /**
   * Display informations about the MaxgTar Class.
   *
   * This function will display vaious informations about the server
   * MaxgTar is running on.
   *
   * The optional parameter DispHeaders is used to generate a full page with
   * HTML headers (TRUE by default) or just the table with the informations
   * (FALSE).  Note that the HTML page generated is verified compatible XHTML
   * 1.0, but not HTML 4.0 compatible.
   */
  function TarInfo($headers = true)
  {
    if($headers)
    {
    ?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
    "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html>

<head>
  <title>MaxgComp TAR</title>
  <style type="text/css">
   body{margin: 20px;}
   body,td{font-size:10pt;font-family: arial;}
  </style>
  <meta name="Author" content="The Maxg Network, http://maxg.info" />
  <meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1" />
</head>

<body bgcolor="#EFEFEF">
<?php
    }
?>
<table border="0" align="center" width="500" cellspacing="4" cellpadding="5" style="border:1px dotted black;">
<tr>
  <td align="center" bgcolor="#DFDFEF" colspan="3" style="font-size:15pt;font-color:#330000;border:1px solid black;">MaxgComp TAR</td>
</tr>
<tr>
  <td colspan="2" bgcolor="#EFEFFE" style="border:1px solid black;">This software was created by the Maxg Network, <a href="http://maxg.info" target="_blank" style="text-decoration:none;color:#333366;">http://maxg.info</a>
   <br />It is distributed under the GNU <a href="http://www.gnu.org/copyleft/lesser.html" target="_blank" style="text-decoration:none;color:#333366;">Lesser General Public License</a>
   <br />You can find the documentation of this class <a href="http://docs.maxg.info" target="_blank" style="text-decoration:none;color:#333366;">here</a></td>
   <td width="60" bgcolor="#EFEFFE" style="border:1px solid black;" align="center"><img src="http://img.maxg.info/menu/tar.gif" border="0" alt="MaxgComp TAR" /></td>
</tr>
<tr>
  <td width="50%" align="center" style="border:1px solid black;" bgcolor="#DFDFEF">MaxgComp TAR version</td>
  <td colspan="2" align="center" bgcolor="#EFEFFE" style="border:1px solid black;"><?=TARLIB_VERSION?></td>
</tr>
<tr>
  <td width="50%" align="center" style="border:1px solid black;" bgcolor="#DFDFEF">ZLIB extensions</td>
  <td colspan="2" align="center" bgcolor="#EFEFFE" style="border:1px solid black;"><?=(extension_loaded('zlib') ? '<b>Yes</b>' : '<i>No</i>')?></td>
</tr>
<tr>
  <td width="50%" align="center" style="border:1px solid black;" bgcolor="#DFDFEF">BZ2 extensions</td>
  <td colspan="2" align="center" bgcolor="#EFEFFE" style="border:1px solid black;"><?=(extension_loaded('bz2') ? '<b>Yes</b>' : '<i>No</i>')?></td>
</tr>
<tr>
  <td width="50%" align="center" style="border:1px solid black;" bgcolor="#DFDFEF">Allow URL fopen</td>
  <td colspan="2" align="center" bgcolor="#EFEFFE" style="border:1px solid black;"><?=(ini_get('allow_url_fopen') ? '<b>Yes</b>' : '<i>No</i>')?></td>
</tr>
<tr>
  <td width="50%" align="center" style="border:1px solid black;" bgcolor="#DFDFEF">Time limit</td>
  <td colspan="2" align="center" bgcolor="#EFEFFE" style="border:1px solid black;"><?=ini_get('max_execution_time')?></td>
</tr>
<tr>
  <td width="50%" align="center" style="border:1px solid black;" bgcolor="#DFDFEF">PHP Version</td>
  <td colspan="2" align="center" bgcolor="#EFEFFE" style="border:1px solid black;"><?=phpversion()?></td>
</tr>
<tr>
  <td colspan="3" align="center" bgcolor="#EFEFFE" style="border:1px solid black;">
    <i>Special thanks to &laquo; Vincent Blavet &raquo; for his PEAR::Archive_Tar class</i>
  </td>
</tr>
</table>
<?php
    if($headers) echo '</body></html>';
  }

  function _seek($p_flen, $tell=0)
  {
    if($this->_nomf === ARCHIVE_DYNAMIC)
      $this->_memdat=substr($this->_memdat,0,($tell ? strlen($this->_memdat) : 0) + $p_flen);
    elseif($this->_comptype == COMPRESS_GZIP)
      @gzseek($this->_fp, ($tell ? @gztell($this->_fp) : 0)+$p_flen);
    elseif($this->_comptype == COMPRESS_BZIP)
      @fseek($this->_fp, ($tell ? @ftell($this->_fp) : 0)+$p_flen);
    else
      @fseek($this->_fp, ($tell ? @ftell($this->_fp) : 0)+$p_flen);
  }

  function _OpenRead()
  {
    if($this->_comptype == COMPRESS_GZIP)
      $this->_fp = @gzopen($this->_nomf, 'rb');
    elseif($this->_comptype == COMPRESS_BZIP)
      $this->_fp = @bzopen($this->_nomf, 'rb');
    else
      $this->_fp = @fopen($this->_nomf, 'rb');

    return ($this->_fp ? true : false);
  }

  function _OpenWrite($add = 'w')
  {
    if($this->_nomf === ARCHIVE_DYNAMIC) return true;

    if($this->_comptype == COMPRESS_GZIP)
      $this->_fp = @gzopen($this->_nomf, $add.'b'.$this->_compzlevel);
    elseif($this->_comptype == COMPRESS_BZIP)
      $this->_fp = @bzopen($this->_nomf, $add.'b');
    else
      $this->_fp = @fopen($this->_nomf, $add.'b');

    return ($this->_fp ? true : false);
  }

  function _CompTar()
  {
    if($this->_nomf === ARCHIVE_DYNAMIC || !$this->_fp) return;

    if($this->_comptype == COMPRESS_GZIP) @gzclose($this->_fp);
    elseif($this->_comptype == COMPRESS_BZIP) @bzclose($this->_fp);
    else @fclose($this->_fp);
  }

  function _read($p_len)
  {
    if($this->_comptype == COMPRESS_GZIP)
      return @gzread($this->_fp,$p_len);
    elseif($this->_comptype == COMPRESS_BZIP)
      return @bzread($this->_fp,$p_len);
    else
      return @fread($this->_fp,$p_len);
  }

  function _write($p_data)
  {
    if($this->_nomf === ARCHIVE_DYNAMIC) $this->_memdat .= $p_data;
    elseif($this->_comptype == COMPRESS_GZIP)
      return @gzwrite($this->_fp,$p_data);

    elseif($this->_comptype == COMPRESS_BZIP)
      return @bzwrite($this->_fp,$p_data);

    else
      return @fwrite($this->_fp,$p_data);
  }

  function _encode($p_dat)
  {
    if($this->_comptype == COMPRESS_GZIP)
      return gzencode($p_dat, $this->_compzlevel);
    elseif($this->_comptype == COMPRESS_BZIP)
      return bzcompress($p_dat, $this->_compzlevel);
    else return $p_dat;
  }

  function _readHeader($p_dat)
  {
    if (!$p_dat || strlen($p_dat) != 512) return false;

    for ($i=0, $chks=0; $i<148; $i++)
      $chks += ord($p_dat[$i]);

    for ($i=156,$chks+=256; $i<512; $i++)
      $chks += ord($p_dat[$i]);

    $headers = @unpack("a100filename/a8mode/a8uid/a8gid/a12size/a12mtime/a8checksum/a1typeflag/a100link/a6magic/a2version/a32uname/a32gname/a8devmajor/a8devminor", $p_dat);
    if(!$headers) return false;

    $return['checksum'] = OctDec(trim($headers['checksum']));
    if ($return['checksum'] != $chks) return false;

    $return['filename'] = trim($headers['filename']);
    $return['mode'] = OctDec(trim($headers['mode']));
    $return['uid'] = OctDec(trim($headers['uid']));
    $return['gid'] = OctDec(trim($headers['gid']));
    $return['size'] = OctDec(trim($headers['size']));
    $return['mtime'] = OctDec(trim($headers['mtime']));
    $return['typeflag'] = $headers['typeflag'];
    $return['link'] = trim($headers['link']);
    $return['uname'] = trim($headers['uname']);
    $return['gname'] = trim($headers['gname']);

    return $return;
  }

  function _fetchFilelist($p_filelist)
  {
    if(!$p_filelist || (is_array($p_filelist) && !@count($p_filelist))) return false;

    if(is_string($p_filelist))
    {
        $p_filelist = explode('|',$p_filelist);
        if(!is_array($p_filelist)) $p_filelist = Array($p_filelist);
    }

    return $p_filelist;
  }

  function _addFileList($p_fl, $p_addir, $p_remdir)
  {
    foreach($p_fl as $file)
    {
      if(($file == $this->_nomf && $this->_nomf != ARCHIVE_DYNAMIC) || !$file || (!file_exists($file) && !is_array($file)))
        continue;

      if (!$this->_addFile($file, $p_addir, $p_remdir))
        continue;

      if (@is_dir($file))
      {
        $d = @opendir($file);

        if(!$d) continue;
        readdir($d); readdir($d);

        while($f = readdir($d))
        {
          if($file != ".") $tmplist[0] = "$file/$f";
          else $tmplist[0] = $d;

          $this->_addFileList($tmplist, $p_addir, $p_remdir);
        }

        closedir($d); unset($tmplist,$f);
      }
    }
    return true;
  }

  function _addFile($p_fn, $p_addir = '', $p_remdir = '')
  {
    if(is_array($p_fn)) list($p_fn, $data) = $p_fn;
    $sname = $p_fn;

    if($p_remdir)
    {
        if(substr($p_remdir,-1) != '/') $p_remdir .= "/";

        if(substr($sname, 0, strlen($p_remdir)) == $p_remdir)
          $sname = substr($sname, strlen($p_remdir));
    }

    if($p_addir) $sname = $p_addir.(substr($p_addir,-1) == '/' ? '' : "/").$sname;

    if(strlen($sname) > 99) return;

    if(@is_dir($p_fn))
    {
      if(!$this->_writeFileHeader($p_fn, $sname)) return false;
    }
    else
    {
     if(!$data)
     {
      $fp = fopen($p_fn, 'rb');
      if(!$fp) return false;
     }

     if(!$this->_writeFileHeader($p_fn, $sname, ($data ? strlen($data) : false))) return false;

     if(!$data)
     {
      while(!feof($fp))
      {
        $packed = pack("a512", fread($fp,512));
        $this->_write($packed);
      }
      fclose($fp);
     }
     else
     {
      for($s = 0; $s < strlen($data); $s += 512)
        $this->_write(pack("a512",substr($data,$s,512)));
     }
    }

    return true;
  }

  function _writeFileHeader($p_file, $p_sname, $p_data=false)
  {
   if(!$p_data)
   {
    if (!$p_sname) $p_sname = $p_file;
    $p_sname = $this->_pathTrans($p_sname);

    $h_info = stat($p_file);
    $h[0] = sprintf("%6s ", DecOct($h_info[4]));
    $h[] = sprintf("%6s ", DecOct($h_info[5]));
    $h[] = sprintf("%6s ", DecOct(fileperms($p_file)));
    clearstatcache();
    $h[] = sprintf("%11s ", DecOct(filesize($p_file)));
    $h[] = sprintf("%11s", DecOct(filemtime($p_file)));

    $dir = @is_dir($p_file) ? '5' : '';
   }
   else
   {
    $dir = '';
    $p_data = sprintf("%11s ", DecOct($p_data));
    $time = sprintf("%11s ", DecOct(time()));
    $h = Array("     0 ","     0 "," 40777 ",$p_data,$time);
   }

    $data_first = pack("a100a8a8a8a12A12", $p_sname, $h[2], $h[0], $h[1], $h[3], $h[4]);
    $data_last = pack("a1a100a6a2a32a32a8a8a155a12", $dir, '', '', '', '', '', '', '', '', "");

     for ($i=0,$chks=0; $i<148; $i++)
       $chks += ord($data_first[$i]);

     for ($i=156, $chks+=256, $j=0; $i<512; $i++, $j++)
       $chks += ord($data_last[$j]);

     $this->_write($data_first);

     $chks = pack("a8",sprintf("%6s ", DecOct($chks)));
     $this->_write($chks.$data_last);

     return true;
  }

  function _append($p_filelist, $p_addir="", $p_remdir="")
  {
    if(!$this->_fp) if(!$this->_OpenWrite('a')) return -6;

    if($this->_nomf == ARCHIVE_DYNAMIC)
    {
      $s = strlen($this->_memdat);
      $this->_memdat = substr($this->_memdat,0,-512);
    }
    else
    {
      $s = filesize($this->_nomf);
      $this->_seek($s-512);
    }

    $ok = $this->_addFileList($p_filelist, $p_addir, $p_remdir);
    $this->_writeFooter();

    return $ok;
  }

  function _pathTrans($p_dir)
  {
    if ($p_dir)
    {
      $subf = explode("/", $p_dir); $r='';

      for ($i=count($subf)-1; $i>=0; $i--)
      {
        if ($subf[$i] == ".") {}
        else if ($subf[$i] == "..") $i--;
        else if (!$subf[$i] && $i!=count($subf)-1 && $i) {}
        else $r = $subf[$i].($i!=(count($subf)-1) ? "/".$r : "");
      }
    }
    return $r;
  }

  function _writeFooter()
  {
    $this->_write(pack("a512", ""));
  }

  function _extractList($p_to, $p_files, $p_remdir, $p_mode = 0755)
  {
    if (!$p_to || ($p_to[0]!="/"&&substr($p_to,0,3)!="../"&&substr($p_to,1,3)!=":\\"&&substr($p_to,1,2)!=":/")) /*" // <- PHP Coder bug */
      $p_to = "./$p_to";

    if ($p_remdir && substr($p_remdir,-1)!='/') $p_remdir .= '/';
    $p_remdirs = strlen($p_remdir);
    while($dat = $this->_read(512))
    {
      $headers = $this->_readHeader($dat);
      if(!$headers['filename']) continue;

      if($p_files == -1 || $p_files[0] == -1) $extract = true;
      else
      {
        $extract = false;

        foreach($p_files as $f)
        {
          if(substr($f,-1) == "/") {
            if((strlen($headers['filename']) > strlen($f)) && (substr($headers['filename'],0,strlen($f))==$f)) {
              $extract = true; break;
            }
          }
          elseif($f == $headers['filename']) {
            $extract = true; break;
          }
        }
      }

      if ($extract)
      {
        $det[] = $headers;
        if ($p_remdir && substr($headers['filename'],0,$p_remdirs)==$p_remdir)
          $headers['filename'] = substr($headers['filename'],$p_remdirs);

        if($headers['filename'].'/' == $p_remdir && $headers['typeflag']=='5') continue;

        if ($p_to != "./" && $p_to != "/")
        {
          while($p_to{-1}=="/") $p_to = substr($p_to,0,-1);

          if($headers['filename']{0} == "/")
            $headers['filename'] = $p_to.$headers['filename'];
          else
            $headers['filename'] = $p_to."/".$headers['filename'];
        }

        $ok = $this->_dirApp($headers['typeflag']=="5" ? $headers['filename'] : dirname($headers['filename']));
        if($ok < 0) return $ok;

        if (!$headers['typeflag'])
        {
          if (!$fp = @fopen($headers['filename'], "wb")) return -6;
          $n = floor($headers['size']/512);

          for ($i=0; $i<$n; $i++) fwrite($fp, $this->_read(512),512);
          if (($headers['size'] % 512) != 0) fwrite($fp, $this->_read(512), $headers['size'] % 512);

          fclose($fp);
          touch($headers['filename'], $headers['mtime']);
          chmod($headers['filename'], $p_mode);
        }
       else
       {
         $this->_seek(ceil($headers['size']/512)*512,1);
       }
      }else $this->_seek(ceil($headers['size']/512)*512,1);
    }
    return $det;
  }

function _dirApp($d)
  {
//  map to dokuwiki function (its more robust)
    return io_mkdir_p($d);
/*
    $d = explode('/', $d);
    $base = '';

    foreach($d as $f)
    {
      if(!is_dir($base.$f))
      {
        $ok = @mkdir($base.$f, 0777);
        if(!$ok) return false;
      }
      $base .= "$f/";
    }
*/
  }

}