aboutsummaryrefslogtreecommitdiff
path: root/src/fs/gnunet-publish.c
blob: 999301c2fdae006dd627e36738521e3698959434 (plain) (blame)
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
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
/*
     This file is part of GNUnet.
     Copyright (C) 2001-2013 GNUnet e.V.

     GNUnet is free software: you can redistribute it and/or modify it
     under the terms of the GNU Affero General Public License as published
     by the Free Software Foundation, either version 3 of the License,
     or (at your option) any later version.

     GNUnet 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
     Affero General Public License for more details.
    
     You should have received a copy of the GNU Affero General Public License
     along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/
/**
 * @file fs/gnunet-publish.c
 * @brief publishing files on GNUnet
 * @author Christian Grothoff
 * @author Krista Bennett
 * @author James Blackwell
 * @author Igor Wronsky
 */
#include "platform.h"
#include "gnunet_fs_service.h"
#include "gnunet_identity_service.h"

/**
 * Global return value from #main().
 */
static int ret;

/**
 * Command line option 'verbose' set
 */
static unsigned int verbose;

/**
 * Handle to our configuration.
 */
static const struct GNUNET_CONFIGURATION_Handle *cfg;

/**
 * Handle for interaction with file-sharing service.
 */
static struct GNUNET_FS_Handle *ctx;

/**
 * Handle to FS-publishing operation.
 */
static struct GNUNET_FS_PublishContext *pc;

/**
 * Meta-data provided via command-line option.
 */
static struct GNUNET_CONTAINER_MetaData *meta;

/**
 * Keywords provided via command-line option.
 */
static struct GNUNET_FS_Uri *topKeywords;

/**
 * Options we set for published blocks.
 */
static struct GNUNET_FS_BlockOptions bo = { {0LL}, 1, 365, 1 };

/**
 * Value of URI provided on command-line (when not publishing
 * a file but just creating UBlocks to refer to an existing URI).
 */
static char *uri_string;

/**
 * Value of URI provided on command-line (when not publishing
 * a file but just creating UBlocks to refer to an existing URI);
 * parsed version of 'uri_string'.
 */
static struct GNUNET_FS_Uri *uri;

/**
 * Command-line option for namespace publishing: identifier for updates
 * to this publication.
 */
static char *next_id;

/**
 * Command-line option for namespace publishing: identifier for this
 * publication.
 */
static char *this_id;

/**
 * Command-line option identifying the pseudonym to use for the publication.
 */
static char *pseudonym;

/**
 * Command-line option for 'inserting'
 */
static int do_insert;

/**
 * Command-line option to disable meta data extraction.
 */
static int disable_extractor;

/**
 * Command-line option to merely simulate publishing operation.
 */
static int do_simulate;

/**
 * Command-line option to only perform meta data extraction, but not publish.
 */
static int extract_only;

/**
 * Command-line option to disable adding creation time.
 */
static int do_disable_creation_time;

/**
 * Handle to the directory scanner (for recursive insertions).
 */
static struct GNUNET_FS_DirScanner *ds;

/**
 * Which namespace do we publish to? NULL if we do not publish to
 * a namespace.
 */
static struct GNUNET_IDENTITY_Ego *namespace;

/**
 * Handle to identity service.
 */
static struct GNUNET_IDENTITY_Handle *identity;


/**
 * We are finished with the publishing operation, clean up all
 * FS state.
 *
 * @param cls NULL
 */
static void
do_stop_task (void *cls)
{
  struct GNUNET_FS_PublishContext *p;

  if (NULL != ds)
  {
    GNUNET_FS_directory_scan_abort (ds);
    ds = NULL;
  }
  if (NULL != identity)
  {
    GNUNET_IDENTITY_disconnect (identity);
    identity = NULL;
  }
  if (NULL != pc)
  {
    p = pc;
    pc = NULL;
    GNUNET_FS_publish_stop (p);
  }
  if (NULL != ctx)
  {
    GNUNET_FS_stop (ctx);
    ctx = NULL;
  }
  if (NULL != meta)
  {
    GNUNET_CONTAINER_meta_data_destroy (meta);
    meta = NULL;
  }
  if (NULL != uri)
  {
    GNUNET_FS_uri_destroy (uri);
    uri = NULL;
  }
}


/**
 * Called by FS client to give information about the progress of an
 * operation.
 *
 * @param cls closure
 * @param info details about the event, specifying the event type
 *        and various bits about the event
 * @return client-context (for the next progress call
 *         for this operation; should be set to NULL for
 *         SUSPEND and STOPPED events).  The value returned
 *         will be passed to future callbacks in the respective
 *         field in the GNUNET_FS_ProgressInfo struct.
 */
static void *
progress_cb (void *cls,
             const struct GNUNET_FS_ProgressInfo *info)
{
  const char *s;
  char *suri;

  switch (info->status)
  {
  case GNUNET_FS_STATUS_PUBLISH_START:
    break;
  case GNUNET_FS_STATUS_PUBLISH_PROGRESS:
    if (verbose)
    {
      s = GNUNET_STRINGS_relative_time_to_string (info->value.publish.eta,
						  GNUNET_YES);
      FPRINTF (stdout,
               _("Publishing `%s' at %llu/%llu (%s remaining)\n"),
               info->value.publish.filename,
               (unsigned long long) info->value.publish.completed,
               (unsigned long long) info->value.publish.size, s);
    }
    break;
  case GNUNET_FS_STATUS_PUBLISH_PROGRESS_DIRECTORY:
    if (verbose)
    {
      s = GNUNET_STRINGS_relative_time_to_string (info->value.publish.specifics.progress_directory.eta,
						  GNUNET_YES);
      FPRINTF (stdout,
               _("Publishing `%s' at %llu/%llu (%s remaining)\n"),
               info->value.publish.filename,
               (unsigned long long) info->value.publish.specifics.progress_directory.completed,
               (unsigned long long) info->value.publish.specifics.progress_directory.total, s);
    }
    break;
  case GNUNET_FS_STATUS_PUBLISH_ERROR:
    FPRINTF (stderr,
             _("Error publishing: %s.\n"),
             info->value.publish.specifics.error.message);
    ret = 1;
    GNUNET_SCHEDULER_shutdown ();
    break;
  case GNUNET_FS_STATUS_PUBLISH_COMPLETED:
    FPRINTF (stdout,
             _("Publishing `%s' done.\n"),
             info->value.publish.filename);
    suri = GNUNET_FS_uri_to_string (info->value.publish.specifics.
                                    completed.chk_uri);
    FPRINTF (stdout,
             _("URI is `%s'.\n"),
             suri);
    GNUNET_free (suri);
    if (NULL != info->value.publish.specifics.completed.sks_uri)
    {
      suri = GNUNET_FS_uri_to_string (info->value.publish.specifics.
                                      completed.sks_uri);
      FPRINTF (stdout,
               _("Namespace URI is `%s'.\n"),
               suri);
      GNUNET_free (suri);
    }
    if (NULL == info->value.publish.pctx)
    {
      ret = 0;
      GNUNET_SCHEDULER_shutdown ();
    }
    break;
  case GNUNET_FS_STATUS_PUBLISH_STOPPED:
    GNUNET_break (NULL == pc);
    return NULL;
  case GNUNET_FS_STATUS_UNINDEX_START:
    FPRINTF (stderr,
             "%s",
             _("Starting cleanup after abort\n"));
    return NULL;
  case GNUNET_FS_STATUS_UNINDEX_PROGRESS:
    return NULL;
  case GNUNET_FS_STATUS_UNINDEX_COMPLETED:
    FPRINTF (stderr,
             "%s",
             _("Cleanup after abort completed.\n"));
    GNUNET_FS_unindex_stop (info->value.unindex.uc);
    return NULL;
  case GNUNET_FS_STATUS_UNINDEX_ERROR:
    FPRINTF (stderr,
             "%s",
             _("Cleanup after abort failed.\n"));
    GNUNET_FS_unindex_stop (info->value.unindex.uc);
    return NULL;
  case GNUNET_FS_STATUS_UNINDEX_STOPPED:
    return NULL;
  default:
    FPRINTF (stderr,
             _("Unexpected status: %d\n"),
             info->status);
    return NULL;
  }
  return "";                    /* non-null */
}


/**
 * Print metadata entries (except binary
 * metadata and the filename).
 *
 * @param cls closure
 * @param plugin_name name of the plugin that generated the meta data
 * @param type type of the meta data
 * @param format format of data
 * @param data_mime_type mime type of @a data
 * @param data value of the meta data
 * @param data_size number of bytes in @a data
 * @return always 0
 */
static int
meta_printer (void *cls,
              const char *plugin_name,
              enum EXTRACTOR_MetaType type,
              enum EXTRACTOR_MetaFormat format,
              const char *data_mime_type,
              const char *data, size_t data_size)
{
  if ((EXTRACTOR_METAFORMAT_UTF8 != format) &&
      (EXTRACTOR_METAFORMAT_C_STRING != format))
    return 0;
  if (EXTRACTOR_METATYPE_GNUNET_ORIGINAL_FILENAME == type)
    return 0;
#if HAVE_LIBEXTRACTOR
  FPRINTF (stdout,
           "\t%s - %s\n",
           EXTRACTOR_metatype_to_string (type),
           data);
#else
  FPRINTF (stdout,
           "\t%d - %s\n",
           type,
           data);
#endif
  return 0;
}


/**
 * Iterator printing keywords
 *
 * @param cls closure
 * @param keyword the keyword
 * @param is_mandatory is the keyword mandatory (in a search)
 * @return #GNUNET_OK to continue to iterate, #GNUNET_SYSERR to abort
 */
static int
keyword_printer (void *cls,
                 const char *keyword,
                 int is_mandatory)
{
  FPRINTF (stdout, "\t%s\n", keyword);
  return GNUNET_OK;
}


/**
 * Function called on all entries before the publication.  This is
 * where we perform modifications to the default based on command-line
 * options.
 *
 * @param cls closure
 * @param fi the entry in the publish-structure
 * @param length length of the file or directory
 * @param m metadata for the file or directory (can be modified)
 * @param uri pointer to the keywords that will be used for this entry (can be modified)
 * @param bo block options
 * @param do_index should we index?
 * @param client_info pointer to client context set upon creation (can be modified)
 * @return #GNUNET_OK to continue, #GNUNET_NO to remove
 *         this entry from the directory, #GNUNET_SYSERR
 *         to abort the iteration
 */
static int
publish_inspector (void *cls,
                   struct GNUNET_FS_FileInformation *fi,
                   uint64_t length,
                   struct GNUNET_CONTAINER_MetaData *m,
                   struct GNUNET_FS_Uri **uri,
                   struct GNUNET_FS_BlockOptions *bo,
                   int *do_index,
                   void **client_info)
{
  char *fn;
  char *fs;
  struct GNUNET_FS_Uri *new_uri;

  if (cls == fi)
    return GNUNET_OK;
  if ( (disable_extractor) &&
       (NULL != *uri) )
  {
    GNUNET_FS_uri_destroy (*uri);
    *uri = NULL;
  }
  if (NULL != topKeywords)
  {
    if (NULL != *uri)
    {
      new_uri = GNUNET_FS_uri_ksk_merge (topKeywords, *uri);
      GNUNET_FS_uri_destroy (*uri);
      *uri = new_uri;
      GNUNET_FS_uri_destroy (topKeywords);
    }
    else
    {
      *uri = topKeywords;
    }
    topKeywords = NULL;
  }
  if (NULL != meta)
  {
    GNUNET_CONTAINER_meta_data_merge (m, meta);
    GNUNET_CONTAINER_meta_data_destroy (meta);
    meta = NULL;
  }
  if (!do_disable_creation_time)
    GNUNET_CONTAINER_meta_data_add_publication_date (m);
  if (extract_only)
  {
    fn = GNUNET_CONTAINER_meta_data_get_by_type (m,
                                                 EXTRACTOR_METATYPE_GNUNET_ORIGINAL_FILENAME);
    fs = GNUNET_STRINGS_byte_size_fancy (length);
    FPRINTF (stdout,
             _("Meta data for file `%s' (%s)\n"),
             fn,
             fs);
    GNUNET_CONTAINER_meta_data_iterate (m, &meta_printer, NULL);
    FPRINTF (stdout,
             _("Keywords for file `%s' (%s)\n"),
             fn,
             fs);
    GNUNET_free (fn);
    GNUNET_free (fs);
    if (NULL != *uri)
      GNUNET_FS_uri_ksk_get_keywords (*uri, &keyword_printer, NULL);
    FPRINTF (stdout,
             "%s",
             "\n");
  }
  if (GNUNET_YES == GNUNET_FS_meta_data_test_for_directory (m))
    GNUNET_FS_file_information_inspect (fi,
                                        &publish_inspector, fi);
  return GNUNET_OK;
}


/**
 * Function called upon completion of the publishing
 * of the UBLOCK for the SKS URI.  As this is the last
 * step, stop our interaction with FS (clean up).
 *
 * @param cls NULL (closure)
 * @param sks_uri URI for the block that was published
 * @param emsg error message, NULL on success
 */
static void
uri_sks_continuation (void *cls,
                      const struct GNUNET_FS_Uri *sks_uri,
                      const char *emsg)
{
  if (NULL != emsg)
  {
    FPRINTF (stderr,
             "%s\n",
             emsg);
    ret = 1;
  }
  GNUNET_SCHEDULER_shutdown ();
}


/**
 * Function called upon completion of the publishing
 * of the UBLOCK for the KSK URI.  Continue with
 * publishing the SKS URI (if applicable) or clean up.
 *
 * @param cls NULL (closure)
 * @param ksk_uri URI for the block that was published
 * @param emsg error message, NULL on success
 */
static void
uri_ksk_continuation (void *cls,
                      const struct GNUNET_FS_Uri *ksk_uri,
                      const char *emsg)
{
  const struct GNUNET_CRYPTO_EcdsaPrivateKey *priv;

  if (NULL != emsg)
  {
    FPRINTF (stderr,
             "%s\n",
             emsg);
    ret = 1;
  }
  if (NULL != namespace)
  {
    priv = GNUNET_IDENTITY_ego_get_private_key (namespace);
    GNUNET_FS_publish_sks (ctx,
                           priv,
                           this_id,
                           next_id,
                           meta,
                           uri,
                           &bo,
			   GNUNET_FS_PUBLISH_OPTION_NONE,
			   &uri_sks_continuation, NULL);
    return;
  }
  GNUNET_SCHEDULER_shutdown ();
}


/**
 * Iterate over the results from the directory scan and extract
 * the desired information for the publishing operation.
 *
 * @param item root with the data from the directroy scan
 * @return handle with the information for the publishing operation
 */
static struct GNUNET_FS_FileInformation *
get_file_information (struct GNUNET_FS_ShareTreeItem *item)
{
  struct GNUNET_FS_FileInformation *fi;
  struct GNUNET_FS_FileInformation *fic;
  struct GNUNET_FS_ShareTreeItem *child;

  if (GNUNET_YES == item->is_directory)
  {
    if (NULL == item->meta)
      item->meta = GNUNET_CONTAINER_meta_data_create ();
    GNUNET_CONTAINER_meta_data_delete (item->meta,
				       EXTRACTOR_METATYPE_MIMETYPE,
				       NULL, 0);
    GNUNET_FS_meta_data_make_directory (item->meta);
    if (NULL == item->ksk_uri)
    {
      const char *mime = GNUNET_FS_DIRECTORY_MIME;
      item->ksk_uri = GNUNET_FS_uri_ksk_create_from_args (1, &mime);
    }
    else
      GNUNET_FS_uri_ksk_add_keyword (item->ksk_uri, GNUNET_FS_DIRECTORY_MIME,
				     GNUNET_NO);
    fi = GNUNET_FS_file_information_create_empty_directory (ctx, NULL,
							    item->ksk_uri,
							    item->meta,
							    &bo, item->filename);
    for (child = item->children_head; child; child = child->next)
    {
      fic = get_file_information (child);
      GNUNET_break (GNUNET_OK == GNUNET_FS_file_information_add (fi, fic));
    }
  }
  else
  {
    fi = GNUNET_FS_file_information_create_from_file (ctx, NULL,
						      item->filename,
						      item->ksk_uri, item->meta,
						      !do_insert,
						      &bo);
  }
  return fi;
}


/**
 * We've finished scanning the directory and optimized the meta data.
 * Begin the publication process.
 *
 * @param directory_scan_result result from the directory scan, freed in this function
 */
static void
directory_trim_complete (struct GNUNET_FS_ShareTreeItem *directory_scan_result)
{
  struct GNUNET_FS_FileInformation *fi;
  const struct GNUNET_CRYPTO_EcdsaPrivateKey *priv;

  fi = get_file_information (directory_scan_result);
  GNUNET_FS_share_tree_free (directory_scan_result);
  if (NULL == fi)
  {
    FPRINTF (stderr,
             "%s",
             _("Could not publish\n"));
    ret = 1;
    GNUNET_SCHEDULER_shutdown ();
    return;
  }
  GNUNET_FS_file_information_inspect (fi, &publish_inspector, NULL);
  if (extract_only)
  {
    GNUNET_FS_file_information_destroy (fi, NULL, NULL);
    GNUNET_SCHEDULER_shutdown ();
    return;
  }
  if (NULL == namespace)
    priv = NULL;
  else
    priv = GNUNET_IDENTITY_ego_get_private_key (namespace);
  pc = GNUNET_FS_publish_start (ctx, fi,
				priv, this_id, next_id,
                                (do_simulate) ?
                                GNUNET_FS_PUBLISH_OPTION_SIMULATE_ONLY :
                                GNUNET_FS_PUBLISH_OPTION_NONE);
  if (NULL == pc)
  {
    FPRINTF (stderr,
             "%s",
             _("Could not start publishing.\n"));
    ret = 1;
    GNUNET_SCHEDULER_shutdown ();
    return;
  }
}


/**
 * Function called by the directory scanner as we build the tree
 * that we will need to publish later.
 *
 * @param cls closure
 * @param filename which file we are making progress on
 * @param is_directory #GNUNET_YES if this is a directory,
 *                     #GNUNET_NO if this is a file
 *                     #GNUNET_SYSERR if it is neither (or unknown)
 * @param reason kind of progress we are making
 */
static void
directory_scan_cb (void *cls,
		   const char *filename,
		   int is_directory,
		   enum GNUNET_FS_DirScannerProgressUpdateReason reason)
{
  struct GNUNET_FS_ShareTreeItem *directory_scan_result;

  switch (reason)
  {
  case GNUNET_FS_DIRSCANNER_FILE_START:
    if (verbose > 1)
    {
      if (is_directory == GNUNET_YES)
	FPRINTF (stdout,
                 _("Scanning directory `%s'.\n"),
                 filename);
      else
	FPRINTF (stdout,
                 _("Scanning file `%s'.\n"),
                 filename);
    }
    break;
  case GNUNET_FS_DIRSCANNER_FILE_IGNORED:
    FPRINTF (stderr,
	     _("There was trouble processing file `%s', skipping it.\n"),
	     filename);
    break;
  case GNUNET_FS_DIRSCANNER_ALL_COUNTED:
    if (verbose)
      FPRINTF (stdout,
               "%s",
               _("Preprocessing complete.\n"));
    break;
  case GNUNET_FS_DIRSCANNER_EXTRACT_FINISHED:
    if (verbose > 2)
      FPRINTF (stdout,
               _("Extracting meta data from file `%s' complete.\n"),
               filename);
    break;
  case GNUNET_FS_DIRSCANNER_FINISHED:
    if (verbose > 1)
      FPRINTF (stdout,
               "%s",
               _("Meta data extraction has finished.\n"));
    directory_scan_result = GNUNET_FS_directory_scan_get_result (ds);
    ds = NULL;
    GNUNET_FS_share_tree_trim (directory_scan_result);
    directory_trim_complete (directory_scan_result);
    break;
  case GNUNET_FS_DIRSCANNER_INTERNAL_ERROR:
    FPRINTF (stdout,
             "%s",
             _("Internal error scanning directory.\n"));
    ret = 1;
    GNUNET_SCHEDULER_shutdown ();
    break;
  default:
    GNUNET_assert (0);
    break;
  }
  fflush (stdout);
}


/**
 * Continuation proceeding with initialization after identity subsystem
 * has been initialized.
 *
 * @param args0 filename to publish
 */
static void
identity_continuation (const char *args0)
{
  char *ex;
  char *emsg;

  if ( (NULL != pseudonym) &&
       (NULL == namespace) )
  {
    FPRINTF (stderr,
             _("Selected pseudonym `%s' unknown\n"),
             pseudonym);
    ret = 1;
    GNUNET_SCHEDULER_shutdown ();
    return;
  }
  if (NULL != uri_string)
  {
    emsg = NULL;
    if (NULL == (uri = GNUNET_FS_uri_parse (uri_string, &emsg)))
    {
      FPRINTF (stderr,
               _("Failed to parse URI: %s\n"),
               emsg);
      GNUNET_free (emsg);
      ret = 1;
      GNUNET_SCHEDULER_shutdown ();
      return;
    }
    GNUNET_FS_publish_ksk (ctx, topKeywords,
                           meta, uri,
                           &bo,
                           GNUNET_FS_PUBLISH_OPTION_NONE,
                           &uri_ksk_continuation,
                           NULL);
    return;
  }
  if (GNUNET_OK !=
      GNUNET_CONFIGURATION_get_value_string (cfg, "FS", "EXTRACTORS", &ex))
    ex = NULL;
  if (0 != ACCESS (args0, R_OK))
  {
    FPRINTF (stderr,
	     _("Failed to access `%s': %s\n"),
	     args0,
	     STRERROR (errno));
    GNUNET_free_non_null (ex);
    return;
  }
  ds = GNUNET_FS_directory_scan_start (args0,
				       disable_extractor,
				       ex,
				       &directory_scan_cb, NULL);
  if (NULL == ds)
  {
    FPRINTF (stderr,
	     "%s",
             _("Failed to start meta directory scanner.  Is gnunet-helper-publish-fs installed?\n"));
    GNUNET_free_non_null (ex);
    return;
  }
  GNUNET_free_non_null (ex);
}


/**
 * Function called by identity service with known pseudonyms.
 *
 * @param cls closure with 'const char *' of filename to publish
 * @param ego ego handle
 * @param ctx context for application to store data for this ego
 *                 (during the lifetime of this process, initially NULL)
 * @param name name assigned by the user for this ego,
 *                   NULL if the user just deleted the ego and it
 *                   must thus no longer be used
 */
static void
identity_cb (void *cls,
	     struct GNUNET_IDENTITY_Ego *ego,
	     void **ctx,
	     const char *name)
{
  const char *args0 = cls;

  if (NULL == ego)
  {
    identity_continuation (args0);
    return;
  }
  if (NULL == name)
    return;
  if (0 == strcmp (name, pseudonym))
    namespace = ego;
}


/**
 * Main function that will be run by the scheduler.
 *
 * @param cls closure
 * @param args remaining command-line arguments
 * @param cfgfile name of the configuration file used (for saving, can be NULL!)
 * @param c configuration
 */
static void
run (void *cls,
     char *const *args,
     const char *cfgfile,
     const struct GNUNET_CONFIGURATION_Handle *c)
{
  /* check arguments */
  if ((NULL != uri_string) && (extract_only))
  {
    printf (_("Cannot extract metadata from a URI!\n"));
    ret = -1;
    return;
  }
  if (((NULL == uri_string) || (extract_only)) &&
      ((NULL == args[0]) || (NULL != args[1])))
  {
    printf (_("You must specify one and only one filename for insertion.\n"));
    ret = -1;
    return;
  }
  if ((NULL != uri_string) && (NULL != args[0]))
  {
    printf (_("You must NOT specify an URI and a filename.\n"));
    ret = -1;
    return;
  }
  if (NULL != pseudonym)
  {
    if (NULL == this_id)
    {
      FPRINTF (stderr, _("Option `%s' is required when using option `%s'.\n"),
               "-t", "-P");
      ret = -1;
      return;
    }
  }
  else
  {                             /* ordinary insertion checks */
    if (NULL != next_id)
    {
      FPRINTF (stderr,
               _("Option `%s' makes no sense without option `%s'.\n"),
               "-N", "-P");
      ret = -1;
      return;
    }
    if (NULL != this_id)
    {
      FPRINTF (stderr,
               _("Option `%s' makes no sense without option `%s'.\n"),
               "-t", "-P");
      ret = -1;
      return;
    }
  }
  cfg = c;
  ctx =
      GNUNET_FS_start (cfg, "gnunet-publish", &progress_cb, NULL,
                       GNUNET_FS_FLAGS_NONE, GNUNET_FS_OPTIONS_END);
  if (NULL == ctx)
  {
    FPRINTF (stderr,
             _("Could not initialize `%s' subsystem.\n"),
             "FS");
    ret = 1;
    return;
  }
  GNUNET_SCHEDULER_add_shutdown (&do_stop_task,
				 NULL);
  if (NULL != pseudonym)
    identity = GNUNET_IDENTITY_connect (cfg,
					&identity_cb,
                                        args[0]);
  else
    identity_continuation (args[0]);
}


/**
 * The main function to publish content to GNUnet.
 *
 * @param argc number of arguments from the command line
 * @param argv command line arguments
 * @return 0 ok, 1 on error
 */
int
main (int argc, char *const *argv)
{
  struct GNUNET_GETOPT_CommandLineOption options[] = {
    GNUNET_GETOPT_option_uint ('a',
                               "anonymity",
                               "LEVEL",
                               gettext_noop ("set the desired LEVEL of sender-anonymity"),
                               &bo.anonymity_level),
    GNUNET_GETOPT_option_flag ('d',
                               "disable-creation-time",
                               gettext_noop ("disable adding the creation time to the "
                                             "metadata of the uploaded file"),
                               &do_disable_creation_time),
    GNUNET_GETOPT_option_flag ('D',
                               "disable-extractor",
                               gettext_noop ("do not use libextractor to add keywords or metadata"),
                               &disable_extractor),
    GNUNET_GETOPT_option_flag ('e',
                               "extract",
                               gettext_noop ("print list of extracted keywords that would "
                                             "be used, but do not perform upload"),
                               &extract_only),
    GNUNET_FS_GETOPT_KEYWORDS ('k',
                               "key",
                               "KEYWORD",
                               gettext_noop ("add an additional keyword for the top-level "
                                             "file or directory (this option can be specified multiple times)"),
                               &topKeywords),
    GNUNET_FS_GETOPT_METADATA ('m',
                               "meta",
                               "TYPE:VALUE",
                               gettext_noop ("set the meta-data for the given TYPE to the given VALUE"),
                               &meta),

    GNUNET_GETOPT_option_flag ('n',
                                  "noindex",
                                  gettext_noop ("do not index, perform full insertion (stores "
                                                "entire file in encrypted form in GNUnet database)"),
                                  &do_insert),

    GNUNET_GETOPT_option_string ('N',
                                 "next",
                                 "ID",
                                 gettext_noop ("specify ID of an updated version to be "
                                               "published in the future (for namespace insertions only)"),
                                 &next_id),

    GNUNET_GETOPT_option_uint ('p',
                                   "priority",
                                   "PRIORITY",
                                   gettext_noop ("specify the priority of the content"),
                                   &bo.content_priority),

    GNUNET_GETOPT_option_string ('P',
                                 "pseudonym",
                                 "NAME",
                                 gettext_noop ("publish the files under the pseudonym "
                                               "NAME (place file into namespace)"),
                                 &pseudonym),
    GNUNET_GETOPT_option_uint ('r',
                               "replication",
                               "LEVEL",
                               gettext_noop ("set the desired replication LEVEL"),
                               &bo.replication_level),
    GNUNET_GETOPT_option_flag ('s',
                               "simulate-only",
                               gettext_noop ("only simulate the process but do not do "
                                             "any actual publishing (useful to compute URIs)"),
                               &do_simulate),
    GNUNET_GETOPT_option_string ('t',
                                 "this",
                                 "ID",
                                 gettext_noop ("set the ID of this version of the publication "
                                               "(for namespace insertions only)"),
                                 &this_id),

    GNUNET_GETOPT_option_string ('u',
                                 "uri",
                                 "URI",
                                 gettext_noop ("URI to be published (can be used instead of passing a "
                                               "file to add keywords to the file with the respective URI)"),
                                 &uri_string),

    GNUNET_GETOPT_option_verbose (&verbose),

    GNUNET_GETOPT_OPTION_END
  };
  bo.expiration_time =
      GNUNET_TIME_year_to_time (GNUNET_TIME_get_current_year () + 2);

  if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
    return 2;
  ret = (GNUNET_OK ==
	 GNUNET_PROGRAM_run (argc, argv, "gnunet-publish [OPTIONS] FILENAME",
			     gettext_noop
			     ("Publish a file or directory on GNUnet"),
			     options, &run, NULL)) ? ret : 1;
  GNUNET_free ((void*) argv);
  return ret;
}

/* end of gnunet-publish.c */