mboxscan.c
33.2 KB
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
/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 1999, 2000, 2001, 2003, 2005,
2007 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 */
/* Mailbox Parsing. */
/* Credits to the c-client and its Authors
* The notorius c-client VALID() macro, was written by Mark Crispin.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#ifdef WITH_PTHREAD
# ifdef HAVE_PTHREAD_H
# define _XOPEN_SOURCE 500
# include <pthread.h>
# endif
#endif
#include <stdlib.h>
#include <mbox0.h>
/* Parsing.
The approach is to detect the "From " as start of a new message, give the
position of the header and scan until "\n" then set header_end, set body
position, scan until we it another "From " and set body_end.
************************************
This is a classic case of premature optimisation being the root of all
Evil(Donald E. Knuth). But I'm under "pressure" ;-) to come with
something "faster". I think it's wastefull * to spend time to gain a few
seconds on 30Megs mailboxes ... but then again ... in computer time, 60
seconds, is eternity. If they use the event notification stuff to get
some headers/messages early ... it's like pissing in the wind(sorry don't
have the english equivalent). The worst is progress_bar it should be ...
&*($^ nuke. For the events, we have to remove the *.LCK file, release the
locks, flush the stream save the pointers etc ... hurry and wait...
I this point I'm pretty much ranting. */
/* From the C-Client, part of pine */
/* You are not expected to understand this macro, but read the next page if
* you are not faint of heart.
*
* Known formats to the VALID macro are:
* From user Wed Dec 2 05:53 1992
* BSD From user Wed Dec 2 05:53:22 1992
* SysV From user Wed Dec 2 05:53 PST 1992
* rn From user Wed Dec 2 05:53:22 PST 1992
* From user Wed Dec 2 05:53 -0700 1992
* From user Wed Dec 2 05:53:22 -0700 1992
* From user Wed Dec 2 05:53 1992 PST
* From user Wed Dec 2 05:53:22 1992 PST
* From user Wed Dec 2 05:53 1992 -0700
* Solaris From user Wed Dec 2 05:53:22 1992 -0700
*
* Plus all of the above with `` remote from xxx'' after it. Thank you very
* much, smail and Solaris, for making my life considerably more complicated.
*/
/*
* What? You want to understand the VALID macro anyway? Alright, since you
* insist. Actually, it isn't really all that difficult, provided that you
* take it step by step.
*
* Line 1 Initializes the return ti value to failure (0);
* Lines 2-3 Validates that the 1st-5th characters are ``From ''.
* Lines 4-6 Validates that there is an end of line and points x at it.
* Lines 7-14 First checks to see if the line is at least 41 characters long
.
* If so, it scans backwards to find the rightmost space. From
* that point, it scans backwards to see if the string matches
* `` remote from''. If so, it sets x to point to the space at
* the start of the string.
* Line 15 Makes sure that there are at least 27 characters in the line.
* Lines 16-21 Checks if the date/time ends with the year (there is a space
* five characters back). If there is a colon three characters
* further back, there is no timezone field, so zn is set to 0
* and ti is set in front of the year. Otherwise, there must
* either to be a space four characters back for a three-letter
* timezone, or a space six characters back followed by a + or -
* for a numeric timezone; in either case, zn and ti become the
* offset of the space immediately before it.
* Lines 22-24 Are the failure case for line 14. If there is a space four
* characters back, it is a three-letter timezone; there must be
a
* space for the year nine characters back. zn is the zone
* offset; ti is the offset of the space.
* Lines 25-28 Are the failure case for line 20. If there is a space six
* characters back, it is a numeric timezone; there must be a
* space eleven characters back and a + or - five characters back
.
* zn is the zone offset; ti is the offset of the space.
* Line 29-32 If ti is valid, make sure that the string before ti is of the
* form www mmm dd hh:mm or www mmm dd hh:mm:ss, otherwise
* invalidate ti. There must be a colon three characters back
* and a space six or nine characters back (depending upon
* whether or not the character six characters back is a colon).
* There must be a space three characters further back (in front
* of the day), one seven characters back (in front of the month)
,
* and one eleven characters back (in front of the day of week).
* ti is set to be the offset of the space before the time.
*
* Why a macro? It gets invoked a *lot* in a tight loop. On some of the
* newer pipelined machines it is faster being open-coded than it would be if
* subroutines are called.
*
* Why does it scan backwards from the end of the line, instead of doing the
* much easier forward scan? There is no deterministic way to parse the
* ``user'' field, because it may contain unquoted spaces! Yes, I tested it t
o
* see if unquoted spaces were possible. They are, and I've encountered enoug
h
* evil mail to be totally unwilling to trust that ``it will never happen''.
*/
#define VALID(s,x,ti,zn) do \
{ \
ti = 0; \
if ((*s == 'F') && (s[1] == 'r') && (s[2] == 'o') && (s[3] == 'm') && \
(s[4] == ' ')) \
{ \
for (x = s + 5; *x && *x != '\n'; x++); \
if (x) \
{ \
if (x - s >= 41) \
{ \
for (zn = -1; x[zn] != ' '; zn--); \
if ((x[zn - 1] == 'm') && (x[zn - 2] == 'o') \
&& (x[zn - 3] == 'r') && (x[zn - 4] == 'f') \
&& (x[zn - 5] == ' ') && (x[zn - 6] == 'e') \
&& (x[zn - 7] == 't') && (x[zn - 8] == 'o') \
&& (x[zn - 9] == 'm') && (x[zn - 10] == 'e') \
&& (x[zn - 11] == 'r') && (x[zn - 12] == ' ')) \
x += zn - 12; \
} \
if (x - s >= 27) \
{ \
if (x[-5] == ' ') \
{ \
if (x[-8] == ':') \
zn = 0, ti = -5; \
else if (x[-9] == ' ') \
ti = zn = -9; \
else if ((x[-11] == ' ') \
&& ((x[-10] == '+') || (x[-10] == '-'))) \
ti = zn = -11; \
} \
else if (x[-4] == ' ') \
{ \
if (x[-9] == ' ') \
zn = -4, ti = -9; \
} \
else if (x[-6] == ' ') \
{ \
if ((x[-11] == ' ') && ((x[-5] == '+') || (x[-5] == '-')))\
zn = -6, ti = -11; \
} \
if (ti && !((x[ti - 3] == ':') && \
(x[ti -= ((x[ti - 6] == ':') ? 9 : 6)] == ' ') && \
(x[ti - 3] == ' ') && (x[ti - 7] == ' ') && \
(x[ti - 11] == ' '))) \
ti = 0; \
} \
} \
} \
} \
while (0)
#define ATTRIBUTE_SET(buf,mum,c0,c1,type) \
do \
{ \
char *s; \
for (s = (buf) + 7; *s; s++) \
{ \
if (*s == c0 || *s == c1) \
{ \
(mum)->attr_flags |= (type); \
break; \
} \
} \
} while (0)
#define ISBCC(buf) ( \
(buf[0] == 'B' || buf[0] == 'b') \
&& (buf[1] == 'C' || buf[1] == 'c') \
&& (buf[2] == 'C' || buf[2] == 'c') \
&& (buf[3] == ':' || buf[3] == ' ' || buf[3] == '\t'))
#define ISCC(buf) ( \
(buf[0] == 'C' || buf[0] == 'c') \
&& (buf[1] == 'C' || buf[1] == 'c') \
&& (buf[2] == ':' || buf[2] == ' ' || buf[2] == '\t'))
#define ISCONTENT_LANGUAGE(buf) ( \
(buf[0] == 'C' || buf[0] == 'c') \
&& (buf[1] == 'O' || buf[1] == 'o') \
&& (buf[2] == 'N' || buf[2] == 'n') \
&& (buf[3] == 'T' || buf[3] == 't') \
&& (buf[4] == 'E' || buf[4] == 'e') \
&& (buf[5] == 'N' || buf[5] == 'n') \
&& (buf[6] == 'T' || buf[6] == 't') \
&& (buf[7] == '-') \
&& (buf[8] == 'L' || buf[8] == 'l') \
&& (buf[9] == 'A' || buf[9] == 'a') \
&& (buf[10] == 'N' || buf[10] == 'n') \
&& (buf[11] == 'G' || buf[11] == 'g') \
&& (buf[12] == 'U' || buf[12] == 'u') \
&& (buf[13] == 'A' || buf[13] == 'a') \
&& (buf[14] == 'G' || buf[14] == 'g') \
&& (buf[15] == 'E' || buf[15] == 'e') \
&& (buf[16] == ':' || buf[16] == ' ' || buf[16] == '\t'))
#define ISCONTENT_TRANSFER_ENCODING(buf) ( \
(buf[0] == 'C' || buf[0] == 'c') \
&& (buf[1] == 'O' || buf[1] == 'o') \
&& (buf[2] == 'N' || buf[2] == 'n') \
&& (buf[3] == 'T' || buf[3] == 't') \
&& (buf[4] == 'E' || buf[4] == 'e') \
&& (buf[5] == 'N' || buf[5] == 'n') \
&& (buf[6] == 'T' || buf[6] == 't') \
&& (buf[7] == '-') \
&& (buf[8] == 'T' || buf[8] == 't') \
&& (buf[9] == 'R' || buf[9] == 'r') \
&& (buf[10] == 'A' || buf[10] == 'a') \
&& (buf[11] == 'N' || buf[11] == 'n') \
&& (buf[12] == 'S' || buf[12] == 's') \
&& (buf[13] == 'F' || buf[13] == 'f') \
&& (buf[14] == 'E' || buf[14] == 'e') \
&& (buf[15] == 'R' || buf[15] == 'r') \
&& (buf[16] == '-') \
&& (buf[17] == 'E' || buf[17] == 'e') \
&& (buf[18] == 'N' || buf[18] == 'n') \
&& (buf[19] == 'C' || buf[19] == 'c') \
&& (buf[20] == 'O' || buf[20] == 'o') \
&& (buf[21] == 'D' || buf[21] == 'd') \
&& (buf[22] == 'I' || buf[22] == 'i') \
&& (buf[23] == 'N' || buf[23] == 'n') \
&& (buf[24] == 'G' || buf[24] == 'g') \
&& (buf[25] == ':' || buf[25] == ' ' || buf[25] == '\t'))
#define ISCONTENT_TYPE(buf) ( \
(buf[0] == 'C' || buf[0] == 'c') \
&& (buf[1] == 'O' || buf[1] == 'o') \
&& (buf[2] == 'N' || buf[2] == 'n') \
&& (buf[3] == 'T' || buf[3] == 't') \
&& (buf[4] == 'E' || buf[4] == 'e') \
&& (buf[5] == 'N' || buf[5] == 'n') \
&& (buf[6] == 'T' || buf[6] == 't') \
&& (buf[7] == '-') \
&& (buf[8] == 'T' || buf[8] == 't') \
&& (buf[9] == 'Y' || buf[9] == 'y') \
&& (buf[10] == 'P' || buf[10] == 'p') \
&& (buf[11] == 'E' || buf[11] == 'e') \
&& (buf[12] == ':' || buf[12] == ' ' || buf[12] == '\t'))
#define ISDATE(buf) ( \
(buf[0] == 'D' || buf[0] == 'd') \
&& (buf[1] == 'A' || buf[1] == 'a') \
&& (buf[2] == 'T' || buf[2] == 't') \
&& (buf[3] == 'E' || buf[3] == 'e') \
&& (buf[4] == ':' || buf[4] == ' ' || buf[4] == '\t'))
#define ISFROM(buf) ( \
(buf[0] == 'F' || buf[0] == 'f') \
&& (buf[1] == 'R' || buf[1] == 'r') \
&& (buf[2] == 'O' || buf[2] == 'o') \
&& (buf[3] == 'M' || buf[3] == 'm') \
&& (buf[4] == ':' || buf[4] == ' ' || buf[4] == '\t'))
#define ISIN_REPLY_TO(buf) ( \
(buf[0] == 'I' || buf[0] == 'i') \
&& (buf[1] == 'N' || buf[1] == 'n') \
&& (buf[2] == '-' || buf[2] == '-') \
&& (buf[3] == 'R' || buf[3] == 'r') \
&& (buf[4] == 'E' || buf[4] == 'e') \
&& (buf[5] == 'P' || buf[5] == 'p') \
&& (buf[6] == 'L' || buf[6] == 'l') \
&& (buf[7] == 'Y' || buf[7] == 'y') \
&& (buf[8] == '-') \
&& (buf[9] == 'T' || buf[9] == 't') \
&& (buf[10] == 'O' || buf[10] == 'o') \
&& (buf[11] == ':' || buf[11] == ' ' || buf[11] == '\t'))
#define ISMESSAGE_ID(buf) ( \
(buf[0] == 'M' || buf[0] == 'm') \
&& (buf[1] == 'E' || buf[1] == 'e') \
&& (buf[2] == 'S' || buf[2] == 's') \
&& (buf[3] == 'S' || buf[3] == 's') \
&& (buf[4] == 'A' || buf[4] == 'a') \
&& (buf[5] == 'G' || buf[5] == 'g') \
&& (buf[6] == 'E' || buf[6] == 'e') \
&& (buf[7] == '-') \
&& (buf[8] == 'I' || buf[8] == 'i') \
&& (buf[9] == 'D' || buf[9] == 'd') \
&& (buf[10] == ':' || buf[10] == ' ' || buf[10] == '\t'))
#define ISREFERENCE(buf) ( \
(buf[0] == 'R' || buf[0] == 'r') \
&& (buf[1] == 'E' || buf[1] == 'e') \
&& (buf[2] == 'F' || buf[2] == 'f') \
&& (buf[3] == 'E' || buf[3] == 'e') \
&& (buf[4] == 'R' || buf[4] == 'r') \
&& (buf[5] == 'E' || buf[5] == 'e') \
&& (buf[6] == 'n' || buf[6] == 'n') \
&& (buf[7] == 'C' || buf[7] == 'c') \
&& (buf[8] == 'E' || buf[8] == 'e') \
&& (buf[9] == ':' || buf[9] == ' ' || buf[9] == '\t'))
#define ISREPLY_TO(buf) ( \
(buf[0] == 'R' || buf[0] == 'r') \
&& (buf[1] == 'E' || buf[1] == 'e') \
&& (buf[2] == 'P' || buf[2] == 'p') \
&& (buf[3] == 'L' || buf[3] == 'l') \
&& (buf[4] == 'Y' || buf[4] == 'y') \
&& (buf[5] == '-') \
&& (buf[6] == 'T' || buf[6] == 't') \
&& (buf[7] == 'O' || buf[7] == 'o') \
&& (buf[8] == ':' || buf[8] == ' ' || buf[8] == '\t'))
#define ISSENDER(buf) ( \
(buf[0] == 'S' || buf[0] == 's') \
&& (buf[1] == 'E' || buf[1] == 'e') \
&& (buf[2] == 'N' || buf[2] == 'n') \
&& (buf[3] == 'D' || buf[3] == 'd') \
&& (buf[4] == 'E' || buf[4] == 'e') \
&& (buf[5] == 'R' || buf[5] == 'r') \
&& (buf[6] == ':' || buf[6] == ' ' || buf[6] == '\t'))
#define ISSTATUS(buf) ( \
(buf[0] == 'S' || buf[0] == 's') \
&& (buf[1] == 'T' || buf[1] == 't') \
&& (buf[2] == 'A' || buf[2] == 'a') \
&& (buf[3] == 'T' || buf[3] == 't') \
&& (buf[4] == 'U' || buf[4] == 'u') \
&& (buf[5] == 'S' || buf[5] == 's') \
&& (buf[6] == ':' || buf[6] == ' ' || buf[6] == '\t'))
#define ISSUBJECT(buf) ( \
(buf[0] == 'S' || buf[0] == 's') \
&& (buf[1] == 'U' || buf[1] == 'u') \
&& (buf[2] == 'B' || buf[2] == 'b') \
&& (buf[3] == 'J' || buf[3] == 'j') \
&& (buf[4] == 'E' || buf[4] == 'e') \
&& (buf[5] == 'C' || buf[5] == 'c') \
&& (buf[6] == 'T' || buf[6] == 't') \
&& (buf[7] == ':' || buf[7] == ' ' || buf[7] == '\t'))
#define ISTO(buf) ( \
(buf[0] == 'T' || buf[0] == 't') \
&& (buf[1] == 'O' || buf[1] == 'o') \
&& (buf[2] == ':' || buf[2] == ' ' || buf[2] == '\t'))
#define ISX_IMAPBASE(buf) ( \
(buf[0] == 'X' || buf[0] == 'x') \
&& (buf[1] == '-') \
&& (buf[2] == 'I' || buf[2] == 'i') \
&& (buf[3] == 'M' || buf[3] == 'm') \
&& (buf[4] == 'A' || buf[4] == 'a') \
&& (buf[5] == 'P' || buf[5] == 'p') \
&& (buf[6] == 'B' || buf[6] == 'b') \
&& (buf[7] == 'A' || buf[7] == 'a') \
&& (buf[8] == 'S' || buf[8] == 's') \
&& (buf[9] == 'E' || buf[9] == 'e') \
&& (buf[10] == ':' || buf[10] == ' ' || buf[10] == '\t'))
#define ISX_UIDL(buf) ( \
(buf[0] == 'X' || buf[0] == 'x') \
&& (buf[1] == '-') \
&& (buf[2] == 'U' || buf[2] == 'u') \
&& (buf[3] == 'I' || buf[3] == 'i') \
&& (buf[4] == 'D' || buf[4] == 'd') \
&& (buf[5] == 'L' || buf[5] == 'l') \
&& (buf[6] == ':' || buf[6] == ' ' || buf[6] == '\t'))
#define ISX_UID(buf) ( \
(buf[0] == 'X' || buf[0] == 'x') \
&& (buf[1] == '-') \
&& (buf[2] == 'U' || buf[2] == 'u') \
&& (buf[3] == 'I' || buf[3] == 'i') \
&& (buf[4] == 'D' || buf[4] == 'd') \
&& (buf[5] == ':' || buf[5] == ' ' || buf[5] == '\t'))
/* Skip prepend spaces. */
#define SKIPSPACE(p) while (*p == ' ') p++
#define ATOI(a,i) \
do { \
SKIPSPACE(a); \
for (i = 0; *a >= '0' && *a <= '9'; a++) \
i = 10 * i + (*a - '0'); \
} while (0)
/* Notifications ADD_MESG. */
#define DISPATCH_ADD_MSG(mbox,mud) \
do \
{ \
int bailing = 0; \
mu_monitor_unlock (mbox->monitor); \
if (mbox->observable) \
{ \
size_t tmp = mud->messages_count + 1; \
bailing = mu_observable_notify (mbox->observable, MU_EVT_MESSAGE_ADD, \
&tmp); \
} \
if (bailing != 0) \
{ \
if (pcount) \
*pcount = (mud)->messages_count; \
mu_locker_unlock (mbox->locker); \
return EINTR; \
} \
mu_monitor_wrlock (mbox->monitor); \
} while (0);
/* Notification MBX_PROGRESS
We do not want to fire up the progress notification every line, it will be
too expensive, so we do it arbitrarely every 10 000 Lines.
FIXME: maybe this should be configurable. */
/* This is more tricky we can not leave the mum struct incomplete. So we
only tell them about the complete messages. */
#define DISPATCH_PROGRESS(mbox,mud) \
do \
{ \
int bailing = 0; \
mu_monitor_unlock (mbox->monitor); \
mud->messages_count--; \
if (mbox->observable) \
bailing = mu_observable_notify (mbox->observable, \
MU_EVT_MAILBOX_PROGRESS, NULL); \
if (bailing != 0) \
{ \
if (pcount) \
*pcount = (mud)->messages_count; \
mu_locker_unlock (mbox->locker); \
return EINTR; \
} \
mud->messages_count++; \
mu_monitor_wrlock (mbox->monitor); \
} while (0)
/* Allocate slots for the new messages. */
/* size_t num = 2 * ((mud)->messages_count) + 10; */
#define ALLOCATE_MSGS(mbox,mud) \
do \
{ \
if ((mud)->messages_count >= (mud)->umessages_count) \
{ \
mbox_message_t *m; \
size_t num = ((mud)->umessages_count) + 1; \
m = realloc ((mud)->umessages, num * sizeof (*m)); \
if (m == NULL) \
{ \
mu_locker_unlock (mbox->locker); \
mu_monitor_unlock (mbox->monitor); \
return ENOMEM; \
} \
(mud)->umessages = m; \
(mud)->umessages[num - 1] = calloc (1, sizeof (*(mum))); \
if ((mud)->umessages[num - 1] == NULL) \
{ \
mu_locker_unlock (mbox->locker); \
mu_monitor_unlock (mbox->monitor); \
return ENOMEM; \
} \
(mud)->umessages_count = num; \
} \
} while (0)
int
mbox_scan0 (mu_mailbox_t mailbox, size_t msgno, size_t *pcount, int do_notif)
{
#define MSGLINELEN 1024
char buf[MSGLINELEN];
int inheader;
int inbody;
mu_off_t total = 0;
mbox_data_t mud = mailbox->data;
mbox_message_t mum = NULL;
int status = 0;
size_t lines;
int newline;
size_t n = 0;
mu_stream_t stream;
size_t min_uid = 0;
int zn, isfrom = 0;
char *temp;
/* Sanity. */
if (mud == NULL)
return EINVAL;
/* Grab the lock. */
mu_monitor_wrlock (mailbox->monitor);
#ifdef WITH_PTHREAD
/* read() is cancellation point since we're doing a potentially
long operation. Lets make sure we clean the state. */
pthread_cleanup_push (mbox_cleanup, (void *)mailbox);
#endif
/* Save the timestamp and size. */
status = mu_stream_size (mailbox->stream, &(mud->size));
if (status != 0)
{
mu_monitor_unlock (mailbox->monitor);
return status;
}
if ((status = mu_locker_lock (mailbox->locker)))
{
mu_monitor_unlock (mailbox->monitor);
return status;
}
/* Seek to the starting point. */
if (mud->umessages && msgno > 0 && mud->messages_count > 0
&& msgno <= mud->messages_count)
{
mum = mud->umessages[msgno - 1];
if (mum)
total = mum->header_from;
mud->messages_count = msgno - 1;
}
else
mud->messages_count = 0;
newline = 1;
errno = lines = inheader = inbody = 0;
stream = mailbox->stream;
while ((status = mu_stream_readline (mailbox->stream, buf, sizeof (buf),
total, &n)) == 0 && n != 0)
{
int nl;
total += n;
nl = (*buf == '\n') ? 1 : 0;
VALID(buf, temp, isfrom, zn);
isfrom = (isfrom) ? 1 : 0;
/* Which part of the message are we in ? */
inheader = isfrom | ((!nl) & inheader);
inbody = (!isfrom) & (!inheader);
if (buf[n - 1] == '\n')
lines++;
if (inheader)
{
/* New message. */
if (isfrom)
{
/* Signal the end of the body. */
if (mum && !mum->body_end)
{
mum->body_end = total - n - newline;
mum->body_lines = --lines - newline;
if (mum->uid <= min_uid)
{
mum->uid = ++min_uid;
/* Note that modification for when expunging. */
mum->attr_flags |= MU_ATTRIBUTE_MODIFIED;
}
else
min_uid = mum->uid;
if (do_notif)
DISPATCH_ADD_MSG (mailbox, mud);
}
/* Allocate_msgs will initialize mum. */
ALLOCATE_MSGS(mailbox, mud);
mud->messages_count++;
mum = mud->umessages[mud->messages_count - 1];
mum->mud = mud;
mum->header_from = total - n;
mum->header_from_end = total;
mum->body_end = mum->body = 0;
mum->attr_flags = 0;
lines = 0;
}
else if (ISSTATUS(buf))
{
ATTRIBUTE_SET(buf, mum, 'r', 'R', MU_ATTRIBUTE_READ);
ATTRIBUTE_SET(buf, mum, 'o', 'O', MU_ATTRIBUTE_SEEN);
ATTRIBUTE_SET(buf, mum, 'a', 'A', MU_ATTRIBUTE_ANSWERED);
ATTRIBUTE_SET(buf, mum, 'd', 'D', MU_ATTRIBUTE_DELETED);
}
}
/* Body. */
if (inbody)
{
/* Set the body position. */
if (mum && !mum->body)
{
mum->body = total - n + nl;
mum->header_lines = lines;
lines = 0;
}
}
newline = nl;
/* Every 100 mesgs update the lock, it should be every minute. */
if ((mud->messages_count % 100) == 0)
mu_locker_touchlock (mailbox->locker);
/* Ping them every 1000 lines. Should be tunable. */
if (do_notif)
if (((lines +1) % 1000) == 0)
DISPATCH_PROGRESS(mailbox, mud);
} /* while */
if (mum)
{
mum->body_end = total - newline;
mum->body_lines = lines - newline;
if (mum->uid <= min_uid)
{
mum->uid = ++min_uid;
/* Note that modification for when expunging. */
mum->attr_flags |= MU_ATTRIBUTE_MODIFIED;
}
else
min_uid = mum->uid;
if (do_notif)
DISPATCH_ADD_MSG (mailbox, mud);
}
if (pcount)
*pcount = mud->messages_count;
mu_locker_unlock (mailbox->locker);
mu_monitor_unlock (mailbox->monitor);
/* Reset the uidvalidity. */
if (mud->messages_count > 0)
{
mum = mud->umessages[0];
if (mud->uidvalidity == 0)
{
mud->uidvalidity = (unsigned long)time (NULL);
mud->uidnext = mud->messages_count + 1;
/* Tell that we have been modified for expunging. */
mum->attr_flags |= MU_ATTRIBUTE_MODIFIED;
}
}
if (mud->messages_count > 0 && min_uid >= mud->uidnext)
{
mum = mud->umessages[0];
mud->uidnext = min_uid + 1;
mum->attr_flags |= MU_ATTRIBUTE_MODIFIED;
}
#ifdef WITH_PTHREAD
pthread_cleanup_pop (0);
#endif
return status;
}