aboutsummaryrefslogtreecommitdiff
path: root/src/fs/gnunet-auto-share.c
blob: ee4a719e01e04043cce9d6bea3b4bff1fe8b1bea (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
/*
     This file is part of GNUnet.
     Copyright (C) 2001--2012 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/>.

     SPDX-License-Identifier: AGPL3.0-or-later
 */
/**
 * @file fs/gnunet-auto-share.c
 * @brief automatically publish files on GNUnet
 * @author Christian Grothoff
 *
 * TODO:
 * - support loading meta data / keywords from resource file
 * - add stability timer (a la buildbot)
 */
#include "platform.h"
#include "gnunet_util_lib.h"

#define MAX_DELAY GNUNET_TIME_relative_multiply (GNUNET_TIME_UNIT_HOURS, 4)

#define MIN_DELAY GNUNET_TIME_UNIT_MINUTES


/**
 * Item in our work queue (or in the set of files/directories
 * we have successfully published).
 */
struct WorkItem
{
  /**
   * PENDING Work is kept in a linked list.
   */
  struct WorkItem *prev;

  /**
   * PENDING Work is kept in a linked list.
   */
  struct WorkItem *next;

  /**
   * Filename of the work item.
   */
  char *filename;

  /**
   * Unique identity for this work item (used to detect
   * if we need to do the work again).
   */
  struct GNUNET_HashCode id;
};


/**
 * Global return value from 'main'.
 */
static int ret;

/**
 * Are we running 'verbosely'?
 */
static unsigned int verbose;

/**
 * Configuration to use.
 */
static const struct GNUNET_CONFIGURATION_Handle *cfg;

/**
 * Name of the configuration file.
 */
static char *cfg_filename;

/**
 * Disable extractor option to use for publishing.
 */
static int disable_extractor;

/**
 * Disable creation time option to use for publishing.
 */
static int do_disable_creation_time;

/**
 * Handle for the main task that does scanning and working.
 */
static struct GNUNET_SCHEDULER_Task *run_task;

/**
 * Anonymity level option to use for publishing.
 */
static unsigned int anonymity_level = 1;

/**
 * Content priority option to use for publishing.
 */
static unsigned int content_priority = 365;

/**
 * Replication level option to use for publishing.
 */
static unsigned int replication_level = 1;

/**
 * Top-level directory we monitor to auto-publish.
 */
static const char *dir_name;

/**
 * Head of linked list of files still to publish.
 */
static struct WorkItem *work_head;

/**
 * Tail of linked list of files still to publish.
 */
static struct WorkItem *work_tail;

/**
 * Map from the hash of the filename (!) to a `struct WorkItem`
 * that was finished.
 */
static struct GNUNET_CONTAINER_MultiHashMap *work_finished;

/**
 * Set to #GNUNET_YES if we are shutting down.
 */
static int do_shutdown;

/**
 * Start time of the current round; used to determine how long
 * one iteration takes (which influences how fast we schedule
 * the next one).
 */
static struct GNUNET_TIME_Absolute start_time;

/**
 * Pipe used to communicate 'gnunet-publish' completion (SIGCHLD) via signal.
 */
static struct GNUNET_DISK_PipeHandle *sigpipe;

/**
 * Handle to the 'gnunet-publish' process that we executed.
 */
static struct GNUNET_OS_Process *publish_proc;


/**
 * Compute the name of the state database file we will use.
 */
static char *
get_state_file ()
{
  char *ret;

  GNUNET_asprintf (&ret,
                   "%s%s.auto-share",
                   dir_name,
                   (DIR_SEPARATOR == dir_name[strlen (dir_name) - 1])
                   ? ""
                   : DIR_SEPARATOR_STR);
  return ret;
}


/**
 * Load the set of #work_finished items from disk.
 */
static void
load_state ()
{
  char *fn;
  struct GNUNET_BIO_ReadHandle *rh;
  uint32_t n;
  struct GNUNET_HashCode id;
  struct WorkItem *wi;
  char *emsg;

  emsg = NULL;
  fn = get_state_file ();
  rh = GNUNET_BIO_read_open_file (fn);
  GNUNET_free (fn);
  if (NULL == rh)
    return;
  fn = NULL;
  if (GNUNET_OK != GNUNET_BIO_read_int32 (rh, "number of files",
                                          (int32_t *) &n))
    goto error;
  while (n-- > 0)
  {
    struct GNUNET_BIO_ReadSpec rs[] = {
      GNUNET_BIO_read_spec_string("filename", &fn, 1024),
      GNUNET_BIO_read_spec_object("id", &id, sizeof(struct GNUNET_HashCode)),
      GNUNET_BIO_read_spec_end(),
    };
    if (GNUNET_OK != GNUNET_BIO_read_spec_commit (rh, rs))
      goto error;
    wi = GNUNET_new (struct WorkItem);
    wi->id = id;
    wi->filename = fn;
    GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
                "Loaded serialization ID for `%s' is `%s'\n",
                wi->filename,
                GNUNET_h2s (&id));
    fn = NULL;
    GNUNET_CRYPTO_hash (wi->filename, strlen (wi->filename), &id);
    GNUNET_break (GNUNET_OK ==
                  GNUNET_CONTAINER_multihashmap_put (
                    work_finished,
                    &id,
                    wi,
                    GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
  }
  if (GNUNET_OK == GNUNET_BIO_read_close (rh, &emsg))
    return;
  rh = NULL;
error:
  GNUNET_free (fn);
  if (NULL != rh)
    (void) GNUNET_BIO_read_close (rh, &emsg);
  GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
              _ ("Failed to load state: %s\n"),
              emsg);
  GNUNET_free (emsg);
}


/**
 * Write work item from the #work_finished map to the given write handle.
 *
 * @param cls the `struct GNUNET_BIO_WriteHandle *`
 * @param key key of the item in the map (unused)
 * @param value the `struct WorkItem` to write
 * @return #GNUNET_OK to continue to iterate (if write worked)
 */
static int
write_item (void *cls, const struct GNUNET_HashCode *key, void *value)
{
  struct GNUNET_BIO_WriteHandle *wh = cls;
  struct WorkItem *wi = value;

  GNUNET_log (GNUNET_ERROR_TYPE_DEBUG,
              "Saving serialization ID of file `%s' with value `%s'\n",
              wi->filename,
              GNUNET_h2s (&wi->id));
  struct GNUNET_BIO_WriteSpec ws[] = {
    GNUNET_BIO_write_spec_string ("auto-share-write-item-filename",
                                  wi->filename),
    GNUNET_BIO_write_spec_object ("id", &wi->id, sizeof(struct GNUNET_HashCode)),
    GNUNET_BIO_write_spec_end (),
  };
  if (GNUNET_OK != GNUNET_BIO_write_spec_commit (wh, ws))
    return GNUNET_SYSERR; /* write error, abort iteration */
  return GNUNET_OK;
}


/**
 * Save the set of #work_finished items on disk.
 */
static void
save_state ()
{
  uint32_t n;
  struct GNUNET_BIO_WriteHandle *wh;
  char *fn;

  n = GNUNET_CONTAINER_multihashmap_size (work_finished);
  fn = get_state_file ();
  wh = GNUNET_BIO_write_open_file (fn);
  if (NULL == wh)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                _ ("Failed to save state to file %s\n"),
                fn);
    GNUNET_free (fn);
    return;
  }
  if (GNUNET_OK != GNUNET_BIO_write_int32 (wh, "size of state", n))
  {
    (void) GNUNET_BIO_write_close (wh, NULL);
    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                _ ("Failed to save state to file %s\n"),
                fn);
    GNUNET_free (fn);
    return;
  }
  (void) GNUNET_CONTAINER_multihashmap_iterate (work_finished, &write_item, wh);
  if (GNUNET_OK != GNUNET_BIO_write_close (wh, NULL))
    GNUNET_log (GNUNET_ERROR_TYPE_WARNING,
                _ ("Failed to save state to file %s\n"),
                fn);
  GNUNET_free (fn);
}


/**
 * Task run on shutdown.  Serializes our current state to disk.
 *
 * @param cls closure, unused
 */
static void
do_stop_task (void *cls)
{
  do_shutdown = GNUNET_YES;
  if (NULL != publish_proc)
  {
    GNUNET_OS_process_kill (publish_proc, SIGKILL);
    return;
  }
  if (NULL != run_task)
  {
    GNUNET_SCHEDULER_cancel (run_task);
    run_task = NULL;
  }
}


/**
 * Decide what the next task is (working or scanning) and schedule it.
 */
static void
schedule_next_task (void);


/**
 * Task triggered whenever we receive a SIGCHLD (child
 * process died).
 *
 * @param cls the `struct WorkItem` we were working on
 */
static void
maint_child_death (void *cls)
{
  struct WorkItem *wi = cls;
  struct GNUNET_HashCode key;
  enum GNUNET_OS_ProcessStatusType type;
  unsigned long code;
  int ret;
  char c;
  const struct GNUNET_DISK_FileHandle *pr;
  const struct GNUNET_SCHEDULER_TaskContext *tc;

  run_task = NULL;
  pr = GNUNET_DISK_pipe_handle (sigpipe, GNUNET_DISK_PIPE_END_READ);
  tc = GNUNET_SCHEDULER_get_task_context ();
  if (0 == (tc->reason & GNUNET_SCHEDULER_REASON_READ_READY))
  {
    /* shutdown scheduled us, someone else will kill child,
       we should just try again */
    run_task = GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL,
                                               pr,
                                               &maint_child_death,
                                               wi);
    return;
  }
  /* consume the signal */
  GNUNET_break (0 < GNUNET_DISK_file_read (pr, &c, sizeof(c)));

  ret = GNUNET_OS_process_status (publish_proc, &type, &code);
  GNUNET_assert (GNUNET_SYSERR != ret);
  if (GNUNET_NO == ret)
  {
    /* process still running? Then where did the SIGCHLD come from?
       Well, let's declare it spurious (kernel bug?) and keep rolling.
     */
    GNUNET_break (0);
    run_task = GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL,
                                               pr,
                                               &maint_child_death,
                                               wi);
    return;
  }
  GNUNET_assert (GNUNET_OK == ret);

  GNUNET_OS_process_destroy (publish_proc);
  publish_proc = NULL;

  if (GNUNET_YES == do_shutdown)
  {
    GNUNET_free (wi->filename);
    GNUNET_free (wi);
    return;
  }
  if ((GNUNET_OS_PROCESS_EXITED == type) && (0 == code))
  {
    GNUNET_log (GNUNET_ERROR_TYPE_INFO,
                _ ("Publication of `%s' done\n"),
                wi->filename);
    GNUNET_CRYPTO_hash (wi->filename, strlen (wi->filename), &key);
    GNUNET_break (GNUNET_OK ==
                  GNUNET_CONTAINER_multihashmap_put (
                    work_finished,
                    &key,
                    wi,
                    GNUNET_CONTAINER_MULTIHASHMAPOPTION_UNIQUE_ONLY));
  }
  else
  {
    GNUNET_CONTAINER_DLL_insert_tail (work_head, work_tail, wi);
  }
  save_state ();
  schedule_next_task ();
}


/**
 * Signal handler called for SIGCHLD.  Triggers the
 * respective handler by writing to the trigger pipe.
 */
static void
sighandler_child_death ()
{
  static char c;
  int old_errno = errno; /* back-up errno */

  GNUNET_break (
    1 ==
    GNUNET_DISK_file_write (GNUNET_DISK_pipe_handle (sigpipe,
                                                     GNUNET_DISK_PIPE_END_WRITE),
                            &c,
                            sizeof(c)));
  errno = old_errno; /* restore errno */
}


/**
 * Function called to process work items.
 *
 * @param cls closure, NULL
 */
static void
work (void *cls)
{
  static char *argv[14];
  static char anon_level[20];
  static char content_prio[20];
  static char repl_level[20];
  struct WorkItem *wi;
  const struct GNUNET_DISK_FileHandle *pr;
  int argc;

  run_task = NULL;
  wi = work_head;
  GNUNET_CONTAINER_DLL_remove (work_head, work_tail, wi);
  argc = 0;
  argv[argc++] = "gnunet-publish";
  if (verbose)
    argv[argc++] = "-V";
  if (disable_extractor)
    argv[argc++] = "-D";
  if (do_disable_creation_time)
    argv[argc++] = "-d";
  argv[argc++] = "-c";
  argv[argc++] = cfg_filename;
  GNUNET_snprintf (anon_level, sizeof(anon_level), "%u", anonymity_level);
  argv[argc++] = "-a";
  argv[argc++] = anon_level;
  GNUNET_snprintf (content_prio, sizeof(content_prio), "%u", content_priority);
  argv[argc++] = "-p";
  argv[argc++] = content_prio;
  GNUNET_snprintf (repl_level, sizeof(repl_level), "%u", replication_level);
  argv[argc++] = "-r";
  argv[argc++] = repl_level;
  argv[argc++] = wi->filename;
  argv[argc] = NULL;
  GNUNET_log (GNUNET_ERROR_TYPE_INFO, _ ("Publishing `%s'\n"), wi->filename);
  GNUNET_assert (NULL == publish_proc);
  publish_proc = GNUNET_OS_start_process_vap (GNUNET_YES,
                                              0,
                                              NULL,
                                              NULL,
                                              NULL,
                                              "gnunet-publish",
                                              argv);
  if (NULL == publish_proc)
  {
    GNUNET_log (GNUNET_ERROR_TYPE_ERROR,
                _ ("Failed to run `%s'\n"),
                "gnunet-publish");
    GNUNET_CONTAINER_DLL_insert (work_head, work_tail, wi);
    run_task =
      GNUNET_SCHEDULER_add_delayed (GNUNET_TIME_UNIT_MINUTES, &work, NULL);
    return;
  }
  pr = GNUNET_DISK_pipe_handle (sigpipe, GNUNET_DISK_PIPE_END_READ);
  run_task = GNUNET_SCHEDULER_add_read_file (GNUNET_TIME_UNIT_FOREVER_REL,
                                             pr,
                                             &maint_child_death,
                                             wi);
}


/**
 * Recursively scan the given file/directory structure to determine
 * a unique ID that represents the current state of the hierarchy.
 *
 * @param cls where to store the unique ID we are computing
 * @param filename file to scan
 * @return #GNUNET_OK (always)
 */
static int
determine_id (void *cls, const char *filename)
{
  struct GNUNET_HashCode *id = cls;
  struct stat sbuf;
  struct GNUNET_HashCode fx[2];
  struct GNUNET_HashCode ft;

  if (0 != stat (filename, &sbuf))
  {
    GNUNET_log_strerror_file (GNUNET_ERROR_TYPE_WARNING, "stat", filename);
    return GNUNET_OK;
  }
  GNUNET_CRYPTO_hash (filename, strlen (filename), &fx[0]);
  if (! S_ISDIR (sbuf.st_mode))
  {
    uint64_t fattr[2];

    fattr[0] = GNUNET_htonll (sbuf.st_size);
    fattr[0] = GNUNET_htonll (sbuf.st_mtime);

    GNUNET_CRYPTO_hash (fattr, sizeof(fattr), &fx[1]);
  }
  else
  {
    memset (&fx[1], 1, sizeof(struct GNUNET_HashCode));
    GNUNET_DISK_directory_scan (filename, &determine_id, &fx[1]);
  }
  /* use hash here to make hierarchical structure distinct from
     all files on the same level */
  GNUNET_CRYPTO_hash (fx, sizeof(fx), &ft);
  /* use XOR here so that order of the files in the directory
     does not matter! */
  GNUNET_CRYPTO_hash_xor (&ft, id, id);
  return GNUNET_OK;
}


/**
 * Function called with a filename (or directory name) to publish
 * (if it has changed since the last time we published it).  This function
 * is called for the top-level files only.
 *
 * @param cls closure, NULL
 * @param filename complete filename (absolute path)
 * @return #GNUNET_OK to continue to iterate, #GNUNET_SYSERR during shutdown
 */
static int
add_file (void *cls, const char *filename)
{
  struct WorkItem *wi;
  struct GNUNET_HashCode key;
  struct GNUNET_HashCode id;

  if (GNUNET_YES == do_shutdown)
    return GNUNET_SYSERR;
  if ((NULL != strstr (filename, "/.auto-share")) ||
      (NULL != strstr (filename, "\\.auto-share")))
    return GNUNET_OK; /* skip internal file */
  GNUNET_CRYPTO_hash (filename, strlen (filename), &key);
  wi = GNUNET_CONTAINER_multihashmap_get (work_finished, &key);
  memset (&id, 0, sizeof(struct GNUNET_HashCode));
  determine_id (&id, filename);
  if (NULL != wi)
  {
    if (0 == memcmp (&id, &wi->id, sizeof(struct GNUNET_HashCode)))
      return GNUNET_OK;   /* skip: we did this one already */
    /* contents changed, need to re-do the directory... */
    GNUNET_assert (
      GNUNET_YES ==
      GNUNET_CONTAINER_multihashmap_remove (work_finished, &key, wi));
  }
  else
  {
    wi = GNUNET_new (struct WorkItem);
    wi->filename = GNUNET_strdup (filename);
  }
  wi->id = id;
  GNUNET_CONTAINER_DLL_insert (work_head, work_tail, wi);
  if (GNUNET_YES == do_shutdown)
    return GNUNET_SYSERR;
  return GNUNET_OK;
}


/**
 * Periodically run task to update our view of the directory to share.
 *
 * @param cls NULL
 */
static void
scan (void *cls)
{
  run_task = NULL;
  start_time = GNUNET_TIME_absolute_get ();
  (void) GNUNET_DISK_directory_scan (dir_name, &add_file, NULL);
  schedule_next_task ();
}


/**
 * Decide what the next task is (working or scanning) and schedule it.
 */
static void
schedule_next_task ()
{
  struct GNUNET_TIME_Relative delay;

  if (GNUNET_YES == do_shutdown)
    return;
  GNUNET_assert (NULL == run_task);
  if (NULL == work_head)
  {
    /* delay by at most 4h, at least 1s, and otherwise in between depending
       on how long it took to scan */
    delay = GNUNET_TIME_absolute_get_duration (start_time);
    delay = GNUNET_TIME_relative_saturating_multiply (delay, 100);
    delay = GNUNET_TIME_relative_min (delay, MAX_DELAY);
    delay = GNUNET_TIME_relative_max (delay, MIN_DELAY);
    run_task = GNUNET_SCHEDULER_add_delayed (delay, &scan, NULL);
  }
  else
  {
    run_task = GNUNET_SCHEDULER_add_now (&work, NULL);
  }
}


/**
 * 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 == args[0]) || (NULL != args[1]) ||
      (GNUNET_YES != GNUNET_DISK_directory_test (args[0], GNUNET_YES)))
  {
    printf (_ (
              "You must specify one and only one directory name for automatic publication.\n"));
    ret = -1;
    return;
  }
  cfg_filename = GNUNET_strdup (cfgfile);
  cfg = c;
  dir_name = args[0];
  work_finished = GNUNET_CONTAINER_multihashmap_create (1024, GNUNET_NO);
  load_state ();
  run_task = GNUNET_SCHEDULER_add_with_priority (GNUNET_SCHEDULER_PRIORITY_IDLE,
                                                 &scan,
                                                 NULL);
  GNUNET_SCHEDULER_add_shutdown (&do_stop_task, NULL);
}


/**
 * Free memory associated with the work item from the work_finished map.
 *
 * @param cls NULL (unused)
 * @param key key of the item in the map (unused)
 * @param value the `struct WorkItem` to free
 * @return #GNUNET_OK to continue to iterate
 */
static int
free_item (void *cls, const struct GNUNET_HashCode *key, void *value)
{
  struct WorkItem *wi = value;

  GNUNET_free (wi->filename);
  GNUNET_free (wi);
  return GNUNET_OK;
}


/**
 * The main function to automatically 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"),
                               &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_uint ('p',
                               "priority",
                               "PRIORITY",
                               gettext_noop (
                                 "specify the priority of the content"),
                               &content_priority),

    GNUNET_GETOPT_option_uint ('r',
                               "replication",
                               "LEVEL",
                               gettext_noop (
                                 "set the desired replication LEVEL"),
                               &replication_level),

    GNUNET_GETOPT_option_verbose (&verbose),

    GNUNET_GETOPT_OPTION_END
  };
  struct WorkItem *wi;
  int ok;
  struct GNUNET_SIGNAL_Context *shc_chld;

  if (GNUNET_OK != GNUNET_STRINGS_get_utf8_args (argc, argv, &argc, &argv))
    return 2;
  sigpipe = GNUNET_DISK_pipe (GNUNET_NO, GNUNET_NO, GNUNET_NO, GNUNET_NO);
  GNUNET_assert (NULL != sigpipe);
  shc_chld =
    GNUNET_SIGNAL_handler_install (GNUNET_SIGCHLD, &sighandler_child_death);
  ok =
    (GNUNET_OK ==
     GNUNET_PROGRAM_run (
       argc,
       argv,
       "gnunet-auto-share [OPTIONS] FILENAME",
       gettext_noop ("Automatically publish files from a directory on GNUnet"),
       options,
       &run,
       NULL))
    ? ret
    : 1;
  if (NULL != work_finished)
  {
    (void) GNUNET_CONTAINER_multihashmap_iterate (work_finished,
                                                  &free_item,
                                                  NULL);
    GNUNET_CONTAINER_multihashmap_destroy (work_finished);
  }
  while (NULL != (wi = work_head))
  {
    GNUNET_CONTAINER_DLL_remove (work_head, work_tail, wi);
    GNUNET_free (wi->filename);
    GNUNET_free (wi);
  }
  GNUNET_SIGNAL_handler_uninstall (shc_chld);
  shc_chld = NULL;
  GNUNET_DISK_pipe_close (sigpipe);
  sigpipe = NULL;
  GNUNET_free (cfg_filename);
  cfg_filename = NULL;
  GNUNET_free_nz ((void *) argv);
  return ok;
}


/* end of gnunet-auto-share.c */