summaryrefslogtreecommitdiff
path: root/libproto/mbox/mbox.c
blob: 62507657e8fa17aa1e97a84ba28975d7cb8c6f97 (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
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
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
/* GNU Mailutils -- a suite of utilities for electronic mail
   Copyright (C) 1999, 2000, 2001, 2003, 2004, 2005, 2006, 2007, 2008,
   2009, 2010 Free Software Foundation, Inc.

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

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

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

/* First draft by Alain Magloire.
 * Completely rewritten by Sergey Poznyakoff.
 */

#ifdef HAVE_CONFIG_H
# include <config.h>
#endif

#include <mbox0.h>
#include <mailutils/cstr.h>
#include <mailutils/io.h>

#define ATTRIBUTE_IS_DELETED(flag)        (flag & MU_ATTRIBUTE_DELETED)
#define ATTRIBUTE_IS_EQUAL(flag1, flag2)  (flag1 == flag2)

static int mbox_is_updated (mu_mailbox_t mailbox);
static int mbox_expunge0 (mu_mailbox_t mailbox, int remove_deleted);

/* Free all ressources associated with Unix concrete mailbox.  */
static void
mbox_destroy (mu_mailbox_t mailbox)
{
  if (mailbox->data)
    {
      size_t i;
      mbox_data_t mud = mailbox->data;
      MU_DEBUG1 (mailbox->debug, MU_DEBUG_TRACE1,
		 "mbox_destroy (%s)\n", mud->name);
      mu_monitor_wrlock (mailbox->monitor);
      for (i = 0; i < mud->umessages_count; i++)
	{
	  mbox_message_t mum = mud->umessages[i];
	  if (mum)
	    {
	      mu_message_destroy (&mum->message, mum);
	      free (mum);
	    }
	}
      if (mud->umessages)
	free (mud->umessages);
      if (mud->name)
	free (mud->name);
      free (mud);
      mailbox->data = NULL;
      mu_monitor_unlock (mailbox->monitor);
    }
}

/* Open the file.  For MU_STREAM_READ, the code tries mmap() first and fall
   back to normal file.  */
static int
mbox_open (mu_mailbox_t mailbox, int flags)
{
  mbox_data_t mud = mailbox->data;
  int status = 0;

  if (mud == NULL)
    return EINVAL;

  mailbox->flags = flags;

  /* Get a stream.  */
  if (mailbox->stream == NULL)
    {
      /* We do not try to mmap for CREAT or APPEND, it is not supported.  */
      status = (flags & MU_STREAM_CREAT)
	          || (mailbox->flags & MU_STREAM_APPEND);

      /* Try to mmap () the file first.  */
      if (status == 0)
	{
	  status = mu_mapfile_stream_create (&mailbox->stream, mud->name,
					     mailbox->flags);
	}

      /* Fall back to normal file if mmap() failed.  */
      if (status)
	status = mu_file_stream_create (&mailbox->stream, mud->name,
					mailbox->flags);

      if (status)
	return status;
    }

  mu_stream_set_buffer (mailbox->stream, mu_buffer_full, 0);

  MU_DEBUG2 (mailbox->debug, MU_DEBUG_TRACE1, "mbox_open (%s, 0x%x)\n",
	     mud->name, mailbox->flags);

  if (mailbox->locker == NULL &&
      (flags & (MU_STREAM_WRITE | MU_STREAM_APPEND | MU_STREAM_CREAT)))
    status = mu_locker_create (&mailbox->locker, mud->name, 0);
  return status;
}

static int
mbox_close (mu_mailbox_t mailbox)
{
  mbox_data_t mud = mailbox->data;
  size_t i; 

  if (mud == NULL)
    return EINVAL;

  MU_DEBUG1 (mailbox->debug, MU_DEBUG_TRACE1,
	     "mbox_close (%s)\n", mud->name);

  /* Make sure that we do not hold any file locking.  */
  mu_locker_unlock (mailbox->locker);

  /* Alain: I'm not sure on the right approach especially if the client is
     working in disconnected mode, where it can mu_mailbox_close/
     mu_mailbox_open for each request, maybe we should keep them for a while.

     Sergey: No, it actually breaks reopening the mailbox. We should make
     sure that the sequence mu_mailbox_open();mu_mailbox_close() catches all
     the changes that might have been done to the mailbox */
  
  mu_monitor_wrlock (mailbox->monitor);
  /* Before closing we need to remove all the messages
     - to reclaim the memory
     - to prepare for another scan.  */
  for (i = 0; i < mud->umessages_count; i++)
    {
      mbox_message_t mum = mud->umessages[i];
      /* Destroy attached messages.  */
      if (mum)
	{
	  mu_message_destroy (&(mum->message), mum);
	  free (mum);
	}
    }
  if (mud->umessages)
    free (mud->umessages);
  mud->umessages = NULL;
  mud->messages_count = mud->umessages_count = 0;
  mud->size = 0;
  mud->uidvalidity = 0;
  mud->uidnext = 0;
  mu_monitor_unlock (mailbox->monitor);

  return mu_stream_close (mailbox->stream);
}

static int
mbox_remove (mu_mailbox_t mailbox)
{
  mbox_data_t mud = mailbox->data;

  MU_DEBUG1 (mailbox->debug, MU_DEBUG_TRACE1,
	     "mbox_remove (%s)\n", mud->name);
  return unlink (mud->name) == 0 ? 0 : errno;
}

/* Cover function that calls the real thing, mbox_scan(), with
   notification set.  */
static int
mbox_scan (mu_mailbox_t mailbox, size_t msgno, size_t *pcount)
{
  size_t i;
  mbox_data_t mud = mailbox->data;
  MU_DEBUG1 (mailbox->debug, MU_DEBUG_TRACE1, "mbox_scan (%s)\n", mud->name);
  if (! mbox_is_updated (mailbox))
    return mbox_scan0 (mailbox, msgno, pcount, 1);
  /* Since the mailbox is already updated fake the scan. */
  if (msgno > 0)
    msgno--; /* The fist message is number "1", decrement for the C array.  */
  for (i = msgno; i < mud->messages_count; i++)
    {
      size_t tmp = i;
      if (mu_observable_notify (mailbox->observable, MU_EVT_MESSAGE_ADD,
				&tmp) != 0)
	break;
      /* FIXME: Hardcoded value! Must be configurable */
      if (((i + 1) % 50) == 0)
	mu_observable_notify (mailbox->observable, MU_EVT_MAILBOX_PROGRESS,
			      NULL);
    }
  *pcount = mud->messages_count;
  return 0;
}

/* Alain: How to handle a shrink ? meaning, the &^$^@%#@^& user start two
   browsers and deleted emails in one session.  My views is that we should
   scream bloody murder and hunt them with a machette. But for now just play
   dumb, but maybe the best approach is to pack our things and leave
   .i.e exit()/abort(). 

   Sergey: Nope, we shouldn't abort. Handling it with MU_EVT_MAILBOX_CORRUPT
   is sensible enough. The caller must decide what's the best approach
   in this case. The simplest one is reopening the mailbox. Imap4d currently
   does that.

   And yet another thought: if a user reads his mail with a ... browser (!),
   he is incurable anyway. */

static int
mbox_is_updated (mu_mailbox_t mailbox)
{
  mu_off_t size = 0;
  mbox_data_t mud = mailbox->data;
  if (mu_stream_size (mailbox->stream, &size) != 0)
    return 1;
  if (size < mud->size)
    {
      mu_observable_notify (mailbox->observable, MU_EVT_MAILBOX_CORRUPT,
			    mailbox);
      /* And be verbose.  ? */
      mu_diag_output (MU_DIAG_EMERG, _("mailbox corrupted, shrank in size"));
      /* FIXME: should I crash? */
      return 0;
    }
  return (mud->size == size);
}

static int
mbox_expunge (mu_mailbox_t mailbox)
{
  return mbox_expunge0 (mailbox, 1);
}

static int
mbox_sync (mu_mailbox_t mailbox)
{
  return mbox_expunge0 (mailbox, 0);
}

static int
mbox_message_uid (mu_message_t msg, size_t *puid)
{
  mbox_message_t mum = mu_message_get_owner (msg);
  if (puid)
    *puid = mum->uid;
  return 0;
}

static int
mbox_message_qid (mu_message_t msg, mu_message_qid_t *pqid)
{
  mbox_message_t mum = mu_message_get_owner (msg);
  return mu_asprintf (pqid, "%lu", (unsigned long) mum->envel_from);
}


/* Mbox message headers */

#ifdef MU_MBOX_SET_HEADER
static int
mbox_header_fill (void *data, char **pbuf, size_t *plen)
{
  /* FIXME: This would be almost exact copy of _header_fill from
     mailbox/message.c. So there's perhaps no use defining this
     method. Instead we prefer to use the default header machinery,
     which relies on the message stream (see #else below). */
  abort ();
}

static int
_msg_header_setup (mu_message_t msg, mbox_message_t mum)
{
  mu_header_t header;
  int status = mu_header_create (&header, NULL, 0);
  if (status == 0)
    {
      mu_header_set_fill (header, mbox_header_fill, msg);
      mu_message_set_header (msg, header, mum);
    }
  return status;
}
#else
static int
_msg_stream_setup (mu_message_t msg, mbox_message_t mum)
{
  mu_stream_t stream;
  int status;
  
  status = mu_streamref_create_abridged (&stream,
					 mum->mud->mailbox->stream,
					 mum->envel_from_end,
					 mum->body_end - 1);
  if (status == 0)
    status = mu_message_set_stream (msg, stream, mum);
  return status;
}
#endif

/* Mbox message body */
static int
mbox_body_size (mu_body_t body, size_t *psize)
{
  mu_message_t msg = mu_body_get_owner (body);
  mbox_message_t mum = mu_message_get_owner (msg);
  if (mum == NULL)
    return EINVAL;
  if (psize)
    *psize = mum->body_end - mum->body;
  return 0;
}

static int
mbox_body_lines (mu_body_t body, size_t *plines)
{
  mu_message_t msg = mu_body_get_owner (body);
  mbox_message_t mum = mu_message_get_owner (msg);
  if (mum == NULL)
    return EINVAL;
  if (plines)
    *plines = mum->body_lines;
  return 0;
}

static int
_msg_body_setup (mu_message_t msg, mbox_message_t mum)
{
  mu_body_t body;
  mu_stream_t stream;
  int status;
  
  status = mu_body_create (&body, msg);
  if (status)
    return status;
  status = mu_streamref_create_abridged (&stream,
					 mum->mud->mailbox->stream,
					 mum->body,
					 mum->body_end - 1);
  if (status)
    mu_body_destroy (&body, msg);
  else
    {
      mu_body_set_stream (body, stream, msg);
      mu_body_set_size (body, mbox_body_size, msg);
      mu_body_set_lines (body, mbox_body_lines, msg);
      mu_message_set_body (msg, body, mum);
    }
  return status;
}

/* Mbox message envelope */

static int
mbox_envelope_date (mu_envelope_t envelope, char *buf, size_t len,
		    size_t *pnwrite)
{
  mu_message_t msg = mu_envelope_get_owner (envelope);
  mbox_message_t mum = mu_message_get_owner (msg);
  size_t n = 0;
  int status;
  char buffer[512];
  char *s;

  if (mum == NULL)
    return EINVAL;

  status = mu_stream_seek (mum->mud->mailbox->stream,
			   mum->envel_from, MU_SEEK_SET,
			   NULL);
  if (status)
    return status;
  status = mu_stream_readline (mum->mud->mailbox->stream,
			       buffer, sizeof(buffer),
			       &n);
  if (status)
    return status;
  mu_rtrim_cset (buffer, "\r\n");
  
  /* Format:  "From [sender] [date]" */
  /* strlen ("From ") == 5 */
  if (n > 5 && (s = strchr (buffer + 5, ' ')) != NULL)
    {
      if (buf && len > 0)
	{
	  len--; /* Leave space for the null.  */
	  strncpy (buf, s + 1, len)[len] = '\0';
	  len = strlen (buf);
	}
      else
	len = strlen (s + 1);
    }
  else
    len = 0;

  if (pnwrite)
    *pnwrite = len;
  return 0;
}

static int
mbox_envelope_sender (mu_envelope_t envelope, char *buf, size_t len,
		      size_t *pnwrite)
{
  mu_message_t msg = mu_envelope_get_owner (envelope);
  mbox_message_t mum = mu_message_get_owner (msg);
  size_t n = 0;
  int status;
  char buffer[512];
  char *s;

  if (mum == NULL)
    return EINVAL;

  status = mu_stream_seek (mum->mud->mailbox->stream,
			   mum->envel_from, MU_SEEK_SET,
			   NULL);
  if (status)
    return status;
  status = mu_stream_readline (mum->mud->mailbox->stream, buffer,
			       sizeof(buffer), &n);
  if (status)
    return status;

  /* Format:  "From [sender] [date]" */
  /* strlen ("From ") == 5 */
  if (n > 5 && (s = strchr (buffer + 5, ' ')) != NULL)
    {
      /* Put a NULL to isolate the sender string, make a C string.  */
      *s = '\0';
      if (buf && len > 0)
	{
	  len--; /* leave space for the null */
	  strncpy (buf, buffer + 5, len)[len] = '\0';
	  len = strlen (buf);
	}
      else
	len = strlen (buffer + 5);
    }
  else
    len = 0;

  if (pnwrite)
    *pnwrite = len;
  return 0;
}

int
_msg_envelope_setup (mu_message_t msg, mbox_message_t mum)
{
  mu_envelope_t envelope;
  int status = mu_envelope_create (&envelope, msg);
  if (status == 0)
    {
      mu_envelope_set_sender (envelope, mbox_envelope_sender, msg);
      mu_envelope_set_date (envelope, mbox_envelope_date, msg);
      mu_message_set_envelope (msg, envelope, mum);
    }
  return status;
}

/* Mbox message attributes */

static int
mbox_get_attr_flags (mu_attribute_t attr, int *pflags)
{
  mu_message_t msg = mu_attribute_get_owner (attr);
  mbox_message_t mum = mu_message_get_owner (msg);

  if (mum == NULL)
    return EINVAL;
  if (pflags)
    *pflags = mum->attr_flags;
  return 0;
}

static int
mbox_set_attr_flags (mu_attribute_t attr, int flags)
{
  mu_message_t msg = mu_attribute_get_owner (attr);
  mbox_message_t mum = mu_message_get_owner (msg);

  if (mum == NULL)
    return EINVAL;
  mum->attr_flags |= flags;
  return 0;
}

static int
mbox_unset_attr_flags (mu_attribute_t attr, int flags)
{
  mu_message_t msg = mu_attribute_get_owner (attr);
  mbox_message_t mum = mu_message_get_owner (msg);

  if (mum == NULL)
    return EINVAL;
  mum->attr_flags &= ~flags;
  return 0;
}

int
_msg_attribute_setup (mu_message_t msg, mbox_message_t mum)
{
  mu_attribute_t attribute;
  int status = mu_attribute_create (&attribute, msg);
  if (status == 0)
    {
      mu_attribute_set_get_flags (attribute, mbox_get_attr_flags, msg);
      mu_attribute_set_set_flags (attribute, mbox_set_attr_flags, msg);
      mu_attribute_set_unset_flags (attribute, mbox_unset_attr_flags, msg);
      mu_message_set_attribute (msg, attribute, mum);
    }
  return status;
}

/* Initialize a message */
static int
_msg_setup (mu_message_t msg, mbox_message_t mum)
{
  int status;
  
#ifdef MU_MBOX_SET_HEADER
  /* Set the header.  */
  status = _msg_header_setup (msg, mum);
#else
  status = _msg_stream_setup (msg, mum);
#endif
  if (status)
    return status;
  
  status = _msg_attribute_setup (msg, mum);
  if (status)
    return status;

  status = _msg_body_setup (msg, mum);
  if (status)
    return status;

  return _msg_envelope_setup (msg, mum);
}

/* Create new mu_message_t from mbox_message_t */
static int
new_message (mu_mailbox_t mailbox, mbox_message_t mum, mu_message_t *pmsg)
{
  int status;
  mu_message_t msg;

  /* Get an empty message struct.  */
  status = mu_message_create (&msg, mum);
  if (status != 0)
    return status;

  status = _msg_setup (msg, mum);
  if (status)
    {
      mu_message_destroy (&msg, mum);
      return status;
    }

  /* Set the UID.  */
  mu_message_set_uid (msg, mbox_message_uid, mum);
  mu_message_set_qid (msg, mbox_message_qid, mum);
  
  /* Attach the message to the mailbox mbox data.  */
  mum->message = msg;
  mu_message_set_mailbox (msg, mailbox, mum);

  *pmsg = msg;
  
  return 0;
}  

static int
mbox_get_message (mu_mailbox_t mailbox, size_t msgno, mu_message_t *pmsg)
{
  int status;
  mbox_data_t mud = mailbox->data;
  mbox_message_t mum;

  /* Sanity checks.  */
  if (pmsg == NULL)
    return MU_ERR_OUT_PTR_NULL;
  if (mud == NULL)
    return EINVAL;

  /* If we did not start a scanning yet do it now.  */
  if (mud->messages_count == 0)
    {
      status = mbox_scan0 (mailbox, 1, NULL, 0);
      if (status != 0)
	return status;
    }

  /* Second sanity: check the message number.  */
  if (!(mud->messages_count > 0
	&& msgno > 0
	&& msgno <= mud->messages_count))
    return EINVAL;

  mum = mud->umessages[msgno - 1];

  /* Check if we already have it.  */
  if (mum->message)
    {
      if (pmsg)
	*pmsg = mum->message;
      return 0;
    }

  MU_DEBUG2 (mailbox->debug, MU_DEBUG_TRACE1, "mbox_get_message (%s, %lu)\n",
	     mud->name, (unsigned long) msgno);

  return new_message (mailbox, mum, pmsg);
}

static int
qid2off (mu_message_qid_t qid, mu_off_t *pret)
{
  mu_off_t ret = 0;
  for (;*qid; qid++)
    {
      if (!('0' <= *qid && *qid <= '9'))
	return 1;
      ret = ret * 10 + *qid - '0';
    }
  *pret = ret;
  return 0;
}
      
static int
mbox_quick_get_message (mu_mailbox_t mailbox, mu_message_qid_t qid,
			mu_message_t *pmsg)
{
  int status;
  mbox_data_t mud = mailbox->data;
  mbox_message_t mum;
  mu_off_t offset;
  
  if (mailbox == NULL || qid2off (qid, &offset)
      || !(mailbox->flags & MU_STREAM_QACCESS))
    return EINVAL;

  if (mud->messages_count == 0)
    {
      status = mbox_scan1 (mailbox, offset, 0);
      if (status != 0)
	return status;
      if (mud->messages_count == 0)
	return MU_ERR_NOENT;
    }

  /* Quick access mode retrieves only one message */
  mum = mud->umessages[0]; 

  /* Check if we already have it and verify if it is the right one. */
  if (mum->message)
    {
      char *vqid;
      status = mu_message_get_qid (mum->message, &vqid);
      if (status)
	return status;
      status = strcmp (qid, vqid);
      free (vqid);
      if (status)
	return MU_ERR_EXISTS;
      if (pmsg)
	*pmsg = mum->message;
      return 0;
    }

  return new_message (mailbox, mum, pmsg);
}

static int
mbox_get_size (mu_mailbox_t mailbox, mu_off_t *psize)
{
  mu_off_t size;
  int status;

  /* Maybe was not open yet ??  */
  status  = mu_stream_size (mailbox->stream, &size);
  if (status != 0)
    return status;
  if (psize)
    *psize = size;
  return 0;
}

static int
mbox_messages_count (mu_mailbox_t mailbox, size_t *pcount)
{
  mbox_data_t mud = mailbox->data;

  if (mud == NULL)
    return EINVAL;

  if (! mbox_is_updated (mailbox))
    return mbox_scan0 (mailbox,  mud->messages_count, pcount, 0);

  if (pcount)
    *pcount = mud->messages_count;

  return 0;
}

/* A "recent" message is the one not marked with MU_ATTRIBUTE_SEEN
   ('O' in the Status header), i.e. a message that is first seen
   by the current session (see attributes.h) */
static int
mbox_messages_recent (mu_mailbox_t mailbox, size_t *pcount)
{
  mbox_data_t mud = mailbox->data;
  mbox_message_t mum;
  size_t j, recent;

  /* If we did not start a scanning yet do it now.  */
  if (mud->messages_count == 0)
    {
      int status = mbox_scan0 (mailbox, 1, NULL, 0);
      if (status != 0)
	return status;
    }
  for (recent = j = 0; j < mud->messages_count; j++)
    {
      mum = mud->umessages[j];
      if (mum && MU_ATTRIBUTE_IS_UNSEEN(mum->attr_flags))
	recent++;
    }
  *pcount = recent;
  return 0;
}

/* An "unseen" message is the one that has not been read yet */
static int
mbox_message_unseen (mu_mailbox_t mailbox, size_t *pmsgno)
{
  mbox_data_t mud = mailbox->data;
  mbox_message_t mum;
  size_t j, unseen;

  /* If we did not start a scanning yet do it now.  */
  if (mud->messages_count == 0)
    {
      int status = mbox_scan0 (mailbox, 1, NULL, 0);
      if (status != 0)
	return status;
    }
  for (unseen = j = 0; j < mud->messages_count; j++)
    {
      mum = mud->umessages[j];
      if (mum && MU_ATTRIBUTE_IS_UNREAD(mum->attr_flags))
	{
	  unseen = j + 1;
	  break;
	}
    }
  *pmsgno = unseen;
  return 0;
}

static int
mbox_uidvalidity (mu_mailbox_t mailbox, unsigned long *puidvalidity)
{
  mbox_data_t mud = mailbox->data;
  int status = mbox_messages_count (mailbox, NULL);
  if (status != 0)
    return status;
  /* If we did not start a scanning yet do it now.  */
  if (mud->messages_count == 0)
    {
      status = mbox_scan0 (mailbox, 1, NULL, 0);
      if (status != 0)
	return status;
    }
  if (puidvalidity)
    *puidvalidity = mud->uidvalidity;
  return 0;
}

static int
mbox_uidnext (mu_mailbox_t mailbox, size_t *puidnext)
{
  mbox_data_t mud = mailbox->data;
  int status = mbox_messages_count (mailbox, NULL);
  if (status != 0)
    return status;
  /* If we did not start a scanning yet do it now.  */
  if (mud->messages_count == 0)
    {
      status = mbox_scan0 (mailbox, 1, NULL, 0);
      if (status != 0)
	return status;
    }
  if (puidnext)
    *puidnext = mud->uidnext;
  return 0;
}

#ifdef WITH_PTHREAD
void
mbox_cleanup (void *arg)
{
  mu_mailbox_t mailbox = arg;
  mu_monitor_unlock (mailbox->monitor);
  mu_locker_unlock (mailbox->locker);
}
#endif


/* Support functions for appending a message to a stream or mbox */

#define MBOX_FIRSTMSG 0x01
#define MBOX_EXPUNGE  0x02

int
restore_sender (mu_message_t msg, char **pret)
{
  mu_header_t hdr;
  const char *s = NULL;
  char *from = NULL;
  
  if (mu_message_get_header (msg, &hdr) == 0)
    mu_header_sget_value (hdr, MU_HEADER_FROM, &s);

  if (s)
    {
      int status;
      mu_address_t addr;
      
      status = mu_address_create (&addr, s);
      if (status == 0)
	mu_address_aget_email (addr, 1, &from);
      mu_address_destroy (&addr);
    }

  if (!from)
    {
      from = strdup (PACKAGE);
      if (!from) 
	return ENOMEM;
    }
  *pret = from;
  return 0;
}

int
restore_date (mu_message_t msg, char **pret)
{
  mu_header_t hdr;
  const char *s;
  char *date = NULL;
  time_t t;
  
  if (mu_message_get_header (msg, &hdr) == 0)
    mu_header_sget_value (hdr, MU_HEADER_DATE, &s);

  if (s && mu_parse_date (s, &t, NULL))
    {
      char datebuf[MU_ENVELOPE_DATE_LENGTH+1];
      
      /* FIXME: 1. Preserve TZ info */
      mu_strftime (datebuf, sizeof datebuf, MU_ENVELOPE_DATE_FORMAT,
		   localtime (&t));
      date = strdup (datebuf);
    }
  else
    {
      time (&t);
      date = strdup (ctime (&t));
    }
  if (!date)
    return ENOMEM;
  *pret = date;
  return 0;
}

static int
write_array (mu_stream_t stream, int count, const char **array)
{
  int i;
  for (i = 0; i < count; i++)
    {
      int status = mu_stream_write (stream, array[i], strlen (array[i]), NULL);
      if (status)
	return status;
    }
  return 0;
}

static int
msg_envelope_to_stream (mu_stream_t out, mu_message_t msg)
{
  mu_envelope_t env;
  int status;
  char *sender = NULL;
  char *datestr = NULL;
  const char *envarr[5];
  
  status = mu_message_get_envelope (msg, &env);
  if (status)
    return status;
  
  status = mu_envelope_aget_sender (env, &sender);
  switch (status)
    {
    case 0:
      break;

    case MU_ERR_NOENT:
      status = restore_sender (msg, &sender);
      if (status == 0)
	break;
    default:
      return status;
    }

  status = mu_envelope_aget_date (env, &datestr);
  switch (status)
    {
    case 0:
      break;

    case MU_ERR_NOENT:
      status = restore_date (msg, &datestr);
      if (status == 0)
	break;
      free (sender);
    default:
      return status;
    }

  mu_rtrim_cset (datestr, "\r\n");

  envarr[0] = "From ";
  envarr[1] = sender;
  envarr[2] = " ";
  envarr[3] = datestr;
  envarr[4] = "\n";

  status = write_array (out, 5, envarr);
  free (sender);
  free (datestr);
  return status;
}

/* Headers */
static int
msg_header_to_stream (mu_stream_t ostr, mu_message_t msg)
{
  int status;
  mu_header_t header;
  mu_iterator_t itr;
  const char *harr[4];

  status = mu_message_get_header (msg, &header);
  if (status)
    return status;
  status = mu_header_get_iterator (header, &itr);
  if (status)
    return status;

  harr[1] = ": ";
  harr[3] = "\n";
  for (mu_iterator_first (itr);
       status == 0 && !mu_iterator_is_done (itr); mu_iterator_next (itr))
    {
      mu_iterator_current_kv (itr, (const void **)&harr[0], (void **)&harr[2]);
      if (mu_c_strcasecmp (harr[0], MU_HEADER_STATUS) == 0
	  || mu_c_strcasecmp (harr[0], MU_HEADER_X_IMAPBASE) == 0
	  || mu_c_strcasecmp (harr[0], MU_HEADER_X_UID) == 0)
	continue;
      status = write_array (ostr, 4, harr);
    }
  mu_iterator_destroy (&itr);
  return status;
  
}

/* Attributes */
static int
msg_attr_to_stream (mu_stream_t ostr, mu_message_t msg)
{
  mu_attribute_t attr;
  char abuf[MU_STATUS_BUF_SIZE + 1];
  const char *harr[4];
  int status;
  
  status = mu_message_get_attribute (msg, &attr);
  if (status)
    return status;
  status = mu_attribute_to_string (attr, abuf, sizeof (abuf), NULL);
  if (status)
    return status;

  harr[0] = MU_HEADER_STATUS;
  harr[1] = ": ";
  harr[2] = abuf;
  harr[3] = "\n";
  return write_array (ostr, 4, harr);
}

/* X-UID header */

static int
uid_to_stream (mu_stream_t ostr, mu_message_t msg, mbox_data_t mud, int flags)
{
  size_t uid = 0;
  
  if (flags & MBOX_EXPUNGE)
    {
      int status = mu_message_get_uid (msg, &uid);
      if (status)
	return status;
    }
  else
    uid = mud->uidnext++;
  
  mu_stream_printf (ostr, "%s: %u\n", MU_HEADER_X_UID, (unsigned) uid);
  if (mu_stream_err (ostr))
    return mu_stream_last_error (ostr);
  return 0;
}

/* Append MSG to stream OSTR in its current position */
static int
append_message_to_stream (mu_stream_t ostr, mu_message_t msg,
			  mbox_data_t mud, int flags)
{
  int status;
  mu_stream_t istr;
  
  status = msg_envelope_to_stream (ostr, msg);
  if (status)
    return status;

  if (flags & MBOX_EXPUNGE)
    {
      mu_body_t body;

      status = msg_header_to_stream (ostr, msg);
      if (status)
	return status;

      if (flags & MBOX_FIRSTMSG)
	{
	  /* FIXME: Perhaps printf should return error code,
	     like the rest of stream functions. */
	  mu_stream_printf (ostr, "%s: %lu %u\n",
			    MU_HEADER_X_IMAPBASE,
			    (unsigned long) mud->uidvalidity,
			    (unsigned) mud->uidnext);
	  if (mu_stream_err (ostr))
	    return mu_stream_last_error (ostr);
	}

      status = msg_attr_to_stream (ostr, msg);
      if (status)
	return status;

      status = uid_to_stream (ostr, msg, mud, flags);
      if (status)
	return status;

      status = mu_stream_write (ostr, "\n", 1, NULL);
      if (status)
	return status;
      
      status = mu_message_get_body (msg, &body);
      if (status)
	return status;
      status = mu_body_get_streamref (body, &istr);
      if (status)
	return status;
    }
  else
    {
      status = mu_message_get_streamref (msg, &istr);
      if (status)
	return status;
    }
  status = mu_stream_copy (ostr, istr, 0, NULL);
  mu_stream_destroy (&istr);
  if (status == 0)
    status = mu_stream_write (ostr, "\n", 1, NULL);
  return status;
}

static int
mbox_append_message (mu_mailbox_t mailbox, mu_message_t msg)
{
  int status = 0;
  mbox_data_t mud = mailbox->data;
  mu_off_t size;
  
  if (msg == NULL || mud == NULL)
    return EINVAL;

  MU_DEBUG1 (mailbox->debug, MU_DEBUG_TRACE1, "mbox_append_message (%s)\n",
	     mud->name);

  if (mailbox->locker &&
      (status = mu_locker_lock (mailbox->locker)) != 0)
    {
      MU_DEBUG1 (mailbox->debug, MU_DEBUG_TRACE1,
		 "mbox_append_message: %s\n", mu_strerror(status));
      return status;
    }

  status = mu_stream_seek (mailbox->stream, 0, MU_SEEK_END, &size);
  if (status)
    return status;
  status = append_message_to_stream (mailbox->stream, msg, mud, 0);
  if (mailbox->locker)
    mu_locker_unlock (mailbox->locker);

  if (status)
    {
      int rc = mu_stream_truncate (mailbox->stream, size);
      if (rc)
	mu_error (_("cannot truncate stream after failed append: %s"),
		  mu_stream_strerror (mailbox->stream, rc));
      return status;
    }
  
  if (mailbox->observable)
    {
      char *buf = NULL;
      mu_asprintf (&buf, "%lu", (unsigned long) size);
      mu_observable_notify (mailbox->observable, MU_EVT_MESSAGE_APPEND, buf);
      free (buf);
    }
  
  return 0;
}


static void
mbox_reset (mu_mailbox_t mailbox, size_t dirty, int remove_deleted)
{
  mbox_data_t mud = mailbox->data;
  size_t i;
  size_t dlast;

  mu_monitor_wrlock (mailbox->monitor);
  for (i = dirty, dlast = mud->messages_count - 1; i <= dlast; i++)
    {
      /* Clear all the references */
      mbox_message_t mum = mud->umessages[i];
      if (remove_deleted && ATTRIBUTE_IS_DELETED (mum->attr_flags))
	{
	  if ((i + 1) <= dlast)
	    {
	      /* Move all the pointers up.  So the message pointer
		 part of mum will be at the right position.  */
	      memmove (mud->umessages + i, mud->umessages + i + 1,
		       (dlast - i) * sizeof (mum));
	      memset (mum, 0, sizeof (*mum));
	      /* We are not free()ing the useless mum, but instead
		 we put it back in the pool, to be reused.  */
	      mud->umessages[dlast] = mum;
	      dlast--;
	      /* Set mum to the new value after the memmove so it
		 gets cleared to.  */
	      mum = mud->umessages[i];
	    }
	  else
	    memset (mum, 0, sizeof (*mum));
	}
      mum->envel_from = mum->envel_from_end = 0;
      mum->body = mum->body_end = 0;
      mum->header_lines = mum->body_lines = 0;
    }
  mu_monitor_unlock (mailbox->monitor);
  /* This resets the messages_count, the last argument 0 means
     not to send event notification.  */
  mbox_scan0 (mailbox, dirty, NULL, 0);
}

static int
mbox_expunge_unlocked (mu_mailbox_t mailbox, size_t dirty, int remove_deleted,
		       mu_stream_t tempstr)
{
  mbox_data_t mud = mailbox->data;
  int status;
  size_t i;
  size_t save_imapbase = 0;  /* uidvalidity is save in the first message.  */
  mu_off_t start_off;
  mu_off_t size;

  /* Set the marker position.  */
  start_off = mud->umessages[dirty]->envel_from;

  for (i = dirty; i < mud->messages_count; i++)
    {
      mbox_message_t mum = mud->umessages[i];
      
      if (remove_deleted && ATTRIBUTE_IS_DELETED (mum->attr_flags))
	{
	  mu_message_destroy (&mum->message, mum);
	  /* We save the uidvalidity in the first message, if it is being
	     deleted we need to move the uidvalidity to the first available
	     (non-deleted) message.  */
	  if (i == save_imapbase)
	    {
	      save_imapbase = i + 1;
	      if (save_imapbase < mud->messages_count)
		mud->umessages[save_imapbase]->attr_flags
		  |= MU_ATTRIBUTE_MODIFIED;
	    }
	  continue;
	}

      if ((mum->attr_flags & MU_ATTRIBUTE_MODIFIED) ||
	  (mum->message && mu_message_is_modified (mum->message)))
	{
	  /* Use relatively expensive append_message_to_stream only if
	     the message is marked dirty.  */
	  
	  int flags = MBOX_EXPUNGE |
	                ((i == save_imapbase) ? MBOX_FIRSTMSG : 0);
					     
	  /* The message was not instantiated, probably the dirty flag was
	     set by mbox_scan(), create one here.  */
	  if (mum->message == 0)
	    {
	      mu_message_t msg;
	      status = mbox_get_message (mailbox, i + 1, &msg);
	      if (status != 0)
		{
		  mu_error (_("%s:%d: error expunging: %s"),	        
			    __FILE__, __LINE__, mu_strerror (status));	
		  return status;
		}
	    }
	  status = append_message_to_stream (tempstr, mum->message, mud,
					     flags);
	  if (status != 0)
	    {
	      mu_error (_("%s:%d: error expunging: %s"),	        
			__FILE__, __LINE__, mu_strerror (status));	
	      return status;
	    }
	  /* Clear the dirty bits.  */
	  mum->attr_flags &= ~MU_ATTRIBUTE_MODIFIED;
	  mu_message_clear_modified (mum->message);
	}
      else
	{
	  /* Otherwise, copy bits from mailbox->stream as is. */
	  
	  status = mu_stream_seek (mailbox->stream, mum->envel_from,
				   MU_SEEK_SET, NULL);
	  if (status)
	    {
	      mu_error (_("%s:%d: seek error: %s"),
			__FILE__, __LINE__,
		        mu_stream_strerror (mailbox->stream, status));
	      return status;
	    }
	  status = mu_stream_copy (tempstr, mailbox->stream,
				   mum->body_end - mum->envel_from, NULL);
	  if (status)
	    {
	      mu_error (_("%s:%d: error copying: %s"),
			__FILE__, __LINE__,
		        mu_strerror (status));
	      return status;
	    }
	}
    }

  /* Caution: before moving data back to the mailbox see
     - if we've receive new mails.  Some programs may not respect the lock,
     - or the lock was held for too long.
     - The mailbox may not have been properly updated before expunging.  */
  if (mu_stream_size (mailbox->stream, &size) == 0)
    {
      if (size > mud->size)
	{
	  mu_off_t len = size - mud->size;

	  status = mu_stream_seek (mailbox->stream, mud->size, MU_SEEK_SET,
				   NULL);
	  if (status)
	    {
	      mu_error (_("%s:%d: seek error: %s"),
			__FILE__, __LINE__,
			mu_stream_strerror (mailbox->stream, status));
	      return status;
	    }
  
	  status = mu_stream_copy (tempstr, mailbox->stream, len, NULL);
	  if (status)
	    {
	      mu_error (_("%s:%d: error writing to temporary stream: %s"),
			__FILE__, __LINE__,
			mu_strerror (status));
	      return status;
	    }
	}
      else if (size < mud->size)
	{
	  /* Corrupted mailbox. */
	  mu_error (_("%s:%d: mailbox shrunk while expunging"),
		    __FILE__, __LINE__);
	  return MU_ERR_FAILURE; /* FIXME: need an error code for that */
	}
    }

  
  /* Copy data from tempstr back to the mailbox. */
  status = mu_stream_seek (mailbox->stream, start_off, MU_SEEK_SET, NULL);
  if (status)
    {
      mu_error (_("%s:%d: seek error: %s"),
		__FILE__, __LINE__,
		mu_stream_strerror (mailbox->stream, status));
      return status;
    }
  
  status = mu_stream_size (tempstr, &size);
  if (status)
    {
      mu_error (_("%s:%d: cannot get size of the temp stream: %s"),
		__FILE__, __LINE__,
		mu_stream_strerror (tempstr, status));
      return status;
    }
  
  status = mu_stream_seek (tempstr, 0, MU_SEEK_SET, NULL);
  if (status)
    {
      mu_error (_("%s:%d: seek error: %s"),
		__FILE__, __LINE__,
		mu_stream_strerror (mailbox->stream, status));
      return status;
    }

  status = mu_stream_copy (mailbox->stream, tempstr, size, NULL);
  if (status)
    {
      mu_error (_("%s:%d: copying from the temporary stream: %s"),
		__FILE__, __LINE__,
		mu_strerror (status));
      return status;
    }
  
  status = mu_stream_truncate (mailbox->stream, start_off + size);
  if (status)
    {
      mu_error (_("%s:%d: error truncating stream: %s"),
		__FILE__, __LINE__,
		mu_strerror (status));
    }
  return status;
}

static int
mbox_expunge0 (mu_mailbox_t mailbox, int remove_deleted)
{
  mbox_data_t mud = mailbox->data;
  size_t dirty;
  int status;
  mu_stream_t tempstr;
  
  if (mud == NULL)
    return EINVAL;

  MU_DEBUG1 (mailbox->debug, MU_DEBUG_TRACE1,
	     "mbox_expunge (%s)\n", mud->name);

  /* Noop.  */
  if (mud->messages_count == 0)
    return 0;

  /* Find first dirty (modified) message. */
  for (dirty = 0; dirty < mud->messages_count; dirty++)
    {
      mbox_message_t mum = mud->umessages[dirty];
      /* Message may have been tampered, break here.  */
      if ((mum->attr_flags & MU_ATTRIBUTE_MODIFIED) ||
	  (mum->attr_flags & MU_ATTRIBUTE_DELETED) ||
	  (mum->message && mu_message_is_modified (mum->message)))
	break;
    }

  /* Did something change ?  */
  if (dirty == mud->messages_count)
    return 0; /* Nothing changed.  */

  /* Lock the mailbox */
  if (mailbox->locker &&
      (status = mu_locker_lock (mailbox->locker)) != 0)
    return status;

  status = mu_temp_file_stream_create (&tempstr, NULL);
  if (status == 0)
    {
      sigset_t signalset;
#ifdef WITH_PTHREAD
      int state;
      pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, &state);
#endif
      sigemptyset (&signalset);
      sigaddset (&signalset, SIGTERM);
      sigaddset (&signalset, SIGHUP);
      sigaddset (&signalset, SIGTSTP);
      sigaddset (&signalset, SIGINT);
      sigaddset (&signalset, SIGWINCH);
      sigprocmask (SIG_BLOCK, &signalset, 0);
      
      status = mbox_expunge_unlocked (mailbox, dirty, remove_deleted,
				      tempstr);

#ifdef WITH_PTHREAD
      pthread_setcancelstate (state, &state);
#endif
      sigprocmask (SIG_UNBLOCK, &signalset, 0);
      
      mu_stream_destroy (&tempstr);
      
      if (status == 0)
	mbox_reset (mailbox, dirty, remove_deleted);
    }
  if (mailbox->locker)
    mu_locker_unlock (mailbox->locker);
  return status;
}


/* Allocate the mbox_data_t struct(concrete mailbox), but don't do any
   parsing on the name or even test for existence.  However we do strip any
   leading "mbox:" part of the name, this is suppose to be the
   protocol/scheme name.  */
int
_mailbox_mbox_init (mu_mailbox_t mailbox)
{
  int status;
  mbox_data_t mud;

  if (mailbox == NULL)
    return EINVAL;

  /* Allocate specific mbox data.  */
  mud = mailbox->data = calloc (1, sizeof (*mud));
  if (mailbox->data == NULL)
    return ENOMEM;

  /* Back pointer.  */
  mud->mailbox = mailbox;

  /* Copy the name:
     We do not do any further interpretation after the scheme "mbox:"
     Because for example on distributed system like QnX4 a file name is
     //390/etc/passwd.  So the best approach is to let the OS handle it
     for example if we receive: "mbox:///var/mail/alain" the mailbox name
     will be "///var/mail/alain", we let open() do the right thing.
     So it will let things like this "mbox://390/var/mail/alain" where
     the "//" _is_ part of the filename, pass correctely.  */
  status = mu_url_aget_path (mailbox->url, &mud->name);
  if (status)
    {
      free (mud);
      mailbox->data = NULL;
      return status;
    }

  /* Overloading the defaults.  */
  mailbox->_destroy = mbox_destroy;

  mailbox->_open = mbox_open;
  mailbox->_close = mbox_close;
  mailbox->_remove = mbox_remove;
  
  /* Overloading of the entire mailbox object methods.  */
  mailbox->_get_message = mbox_get_message;
  mailbox->_append_message = mbox_append_message;
  mailbox->_messages_count = mbox_messages_count;
  mailbox->_messages_recent = mbox_messages_recent;
  mailbox->_message_unseen = mbox_message_unseen;
  mailbox->_expunge = mbox_expunge;
  mailbox->_sync = mbox_sync;
  mailbox->_uidvalidity = mbox_uidvalidity;
  mailbox->_uidnext = mbox_uidnext;
  mailbox->_quick_get_message = mbox_quick_get_message;

  mailbox->_scan = mbox_scan;
  mailbox->_is_updated = mbox_is_updated;

  mailbox->_get_size = mbox_get_size;

  /* Set our properties.  */
  {
    mu_property_t property = NULL;
    mu_mailbox_get_property (mailbox, &property);
    mu_property_set_value (property, "TYPE", "MBOX", 1);
  }

  MU_DEBUG1 (mailbox->debug, MU_DEBUG_TRACE1, "mbox_init (%s)\n", mud->name);
  return 0; /* okdoke */
}

Return to:

Send suggestions and report system problems to the System administrator.