forked from RsyncProject/rsync
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathexclude.c
1415 lines (1275 loc) · 40.3 KB
/
exclude.c
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
/*
* The filter include/exclude routines.
*
* Copyright (C) 1996-2001 Andrew Tridgell <tridge@samba.org>
* Copyright (C) 1996 Paul Mackerras
* Copyright (C) 2002 Martin Pool
* Copyright (C) 2003-2020 Wayne Davison
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, visit the http://fsf.org website.
*/
#include "rsync.h"
#include "ifuncs.h"
extern int am_server;
extern int am_sender;
extern int eol_nulls;
extern int io_error;
extern int local_server;
extern int prune_empty_dirs;
extern int ignore_perishable;
extern int delete_mode;
extern int delete_excluded;
extern int cvs_exclude;
extern int sanitize_paths;
extern int protocol_version;
extern int module_id;
extern char curr_dir[MAXPATHLEN];
extern unsigned int curr_dir_len;
extern unsigned int module_dirlen;
filter_rule_list filter_list = { .debug_type = "" };
filter_rule_list cvs_filter_list = { .debug_type = " [global CVS]" };
filter_rule_list daemon_filter_list = { .debug_type = " [daemon]" };
int saw_xattr_filter = 0;
/* Need room enough for ":MODS " prefix plus some room to grow. */
#define MAX_RULE_PREFIX (16)
#define SLASH_WILD3_SUFFIX "/***"
/* The dirbuf is set by push_local_filters() to the current subdirectory
* relative to curr_dir that is being processed. The path always has a
* trailing slash appended, and the variable dirbuf_len contains the length
* of this path prefix. The path is always absolute. */
static char dirbuf[MAXPATHLEN+1];
static unsigned int dirbuf_len = 0;
static int dirbuf_depth;
/* This is True when we're scanning parent dirs for per-dir merge-files. */
static BOOL parent_dirscan = False;
/* This array contains a list of all the currently active per-dir merge
* files. This makes it easier to save the appropriate values when we
* "push" down into each subdirectory. */
static filter_rule **mergelist_parents;
static int mergelist_cnt = 0;
static int mergelist_size = 0;
/* Each filter_list_struct describes a singly-linked list by keeping track
* of both the head and tail pointers. The list is slightly unusual in that
* a parent-dir's content can be appended to the end of the local list in a
* special way: the last item in the local list has its "next" pointer set
* to point to the inherited list, but the local list's tail pointer points
* at the end of the local list. Thus, if the local list is empty, the head
* will be pointing at the inherited content but the tail will be NULL. To
* help you visualize this, here are the possible list arrangements:
*
* Completely Empty Local Content Only
* ================================== ====================================
* head -> NULL head -> Local1 -> Local2 -> NULL
* tail -> NULL tail -------------^
*
* Inherited Content Only Both Local and Inherited Content
* ================================== ====================================
* head -> Parent1 -> Parent2 -> NULL head -> L1 -> L2 -> P1 -> P2 -> NULL
* tail -> NULL tail ---------^
*
* This means that anyone wanting to traverse the whole list to use it just
* needs to start at the head and use the "next" pointers until it goes
* NULL. To add new local content, we insert the item after the tail item
* and update the tail (obviously, if "tail" was NULL, we insert it at the
* head). To clear the local list, WE MUST NOT FREE THE INHERITED CONTENT
* because it is shared between the current list and our parent list(s).
* The easiest way to handle this is to simply truncate the list after the
* tail item and then free the local list from the head. When inheriting
* the list for a new local dir, we just save off the filter_list_struct
* values (so we can pop back to them later) and set the tail to NULL.
*/
static void teardown_mergelist(filter_rule *ex)
{
int j;
if (!ex->u.mergelist)
return;
if (DEBUG_GTE(FILTER, 2)) {
rprintf(FINFO, "[%s] deactivating mergelist #%d%s\n",
who_am_i(), mergelist_cnt - 1,
ex->u.mergelist->debug_type);
}
free(ex->u.mergelist->debug_type);
free(ex->u.mergelist);
for (j = 0; j < mergelist_cnt; j++) {
if (mergelist_parents[j] == ex) {
mergelist_parents[j] = NULL;
break;
}
}
while (mergelist_cnt && mergelist_parents[mergelist_cnt-1] == NULL)
mergelist_cnt--;
}
static void free_filter(filter_rule *ex)
{
if (ex->rflags & FILTRULE_PERDIR_MERGE)
teardown_mergelist(ex);
free(ex->pattern);
free(ex);
}
static void free_filters(filter_rule *ent)
{
while (ent) {
filter_rule *next = ent->next;
free_filter(ent);
ent = next;
}
}
/* Build a filter structure given a filter pattern. The value in "pat"
* is not null-terminated. "rule" is either held or freed, so the
* caller should not free it. */
static void add_rule(filter_rule_list *listp, const char *pat, unsigned int pat_len,
filter_rule *rule, int xflags)
{
const char *cp;
unsigned int pre_len, suf_len, slash_cnt = 0;
char *mention_rule_suffix;
if (DEBUG_GTE(FILTER, 1) && pat_len && (pat[pat_len-1] == ' ' || pat[pat_len-1] == '\t'))
mention_rule_suffix = " -- CAUTION: trailing whitespace!";
else
mention_rule_suffix = DEBUG_GTE(FILTER, 2) ? "" : NULL;
if (mention_rule_suffix) {
rprintf(FINFO, "[%s] add_rule(%s%.*s%s)%s%s\n",
who_am_i(), get_rule_prefix(rule, pat, 0, NULL),
(int)pat_len, pat, (rule->rflags & FILTRULE_DIRECTORY) ? "/" : "",
listp->debug_type, mention_rule_suffix);
}
/* These flags also indicate that we're reading a list that
* needs to be filtered now, not post-filtered later. */
if (xflags & (XFLG_ANCHORED2ABS|XFLG_ABS_IF_SLASH)
&& (rule->rflags & FILTRULES_SIDES)
== (am_sender ? FILTRULE_RECEIVER_SIDE : FILTRULE_SENDER_SIDE)) {
/* This filter applies only to the other side. Drop it. */
free_filter(rule);
return;
}
if (pat_len > 1 && pat[pat_len-1] == '/') {
pat_len--;
rule->rflags |= FILTRULE_DIRECTORY;
}
for (cp = pat; cp < pat + pat_len; cp++) {
if (*cp == '/')
slash_cnt++;
}
if (!(rule->rflags & (FILTRULE_ABS_PATH | FILTRULE_MERGE_FILE))
&& ((xflags & (XFLG_ANCHORED2ABS|XFLG_ABS_IF_SLASH) && *pat == '/')
|| (xflags & XFLG_ABS_IF_SLASH && slash_cnt))) {
rule->rflags |= FILTRULE_ABS_PATH;
if (*pat == '/')
pre_len = dirbuf_len - module_dirlen - 1;
else
pre_len = 0;
} else
pre_len = 0;
/* The daemon wants dir-exclude rules to get an appended "/" + "***". */
if (xflags & XFLG_DIR2WILD3
&& BITS_SETnUNSET(rule->rflags, FILTRULE_DIRECTORY, FILTRULE_INCLUDE)) {
rule->rflags &= ~FILTRULE_DIRECTORY;
suf_len = sizeof SLASH_WILD3_SUFFIX - 1;
} else
suf_len = 0;
rule->pattern = new_array(char, pre_len + pat_len + suf_len + 1);
if (pre_len) {
memcpy(rule->pattern, dirbuf + module_dirlen, pre_len);
for (cp = rule->pattern; cp < rule->pattern + pre_len; cp++) {
if (*cp == '/')
slash_cnt++;
}
}
strlcpy(rule->pattern + pre_len, pat, pat_len + 1);
pat_len += pre_len;
if (suf_len) {
memcpy(rule->pattern + pat_len, SLASH_WILD3_SUFFIX, suf_len+1);
pat_len += suf_len;
slash_cnt++;
}
if (strpbrk(rule->pattern, "*[?")) {
rule->rflags |= FILTRULE_WILD;
if ((cp = strstr(rule->pattern, "**")) != NULL) {
rule->rflags |= FILTRULE_WILD2;
/* If the pattern starts with **, note that. */
if (cp == rule->pattern)
rule->rflags |= FILTRULE_WILD2_PREFIX;
/* If the pattern ends with ***, note that. */
if (pat_len >= 3
&& rule->pattern[pat_len-3] == '*'
&& rule->pattern[pat_len-2] == '*'
&& rule->pattern[pat_len-1] == '*')
rule->rflags |= FILTRULE_WILD3_SUFFIX;
}
}
if (rule->rflags & FILTRULE_PERDIR_MERGE) {
filter_rule_list *lp;
unsigned int len;
int i;
if ((cp = strrchr(rule->pattern, '/')) != NULL)
cp++;
else
cp = rule->pattern;
/* If the local merge file was already mentioned, don't
* add it again. */
for (i = 0; i < mergelist_cnt; i++) {
filter_rule *ex = mergelist_parents[i];
const char *s;
if (!ex)
continue;
s = strrchr(ex->pattern, '/');
if (s)
s++;
else
s = ex->pattern;
len = strlen(s);
if (len == pat_len - (cp - rule->pattern) && memcmp(s, cp, len) == 0) {
free_filter(rule);
return;
}
}
lp = new_array0(filter_rule_list, 1);
if (asprintf(&lp->debug_type, " [per-dir %s]", cp) < 0)
out_of_memory("add_rule");
rule->u.mergelist = lp;
if (mergelist_cnt == mergelist_size) {
mergelist_size += 5;
mergelist_parents = realloc_array(mergelist_parents, filter_rule *, mergelist_size);
}
if (DEBUG_GTE(FILTER, 2)) {
rprintf(FINFO, "[%s] activating mergelist #%d%s\n",
who_am_i(), mergelist_cnt, lp->debug_type);
}
mergelist_parents[mergelist_cnt++] = rule;
} else
rule->u.slash_cnt = slash_cnt;
if (!listp->tail) {
rule->next = listp->head;
listp->head = listp->tail = rule;
} else {
rule->next = listp->tail->next;
listp->tail->next = rule;
listp->tail = rule;
}
}
/* This frees any non-inherited items, leaving just inherited items on the list. */
static void pop_filter_list(filter_rule_list *listp)
{
filter_rule *inherited;
if (!listp->tail)
return;
inherited = listp->tail->next;
/* Truncate any inherited items from the local list. */
listp->tail->next = NULL;
/* Now free everything that is left. */
free_filters(listp->head);
listp->head = inherited;
listp->tail = NULL;
}
/* This returns an expanded (absolute) filename for the merge-file name if
* the name has any slashes in it OR if the parent_dirscan var is True;
* otherwise it returns the original merge_file name. If the len_ptr value
* is non-NULL the merge_file name is limited by the referenced length
* value and will be updated with the length of the resulting name. We
* always return a name that is null terminated, even if the merge_file
* name was not. */
static char *parse_merge_name(const char *merge_file, unsigned int *len_ptr,
unsigned int prefix_skip)
{
static char buf[MAXPATHLEN];
char *fn, tmpbuf[MAXPATHLEN];
unsigned int fn_len;
if (!parent_dirscan && *merge_file != '/') {
/* Return the name unchanged it doesn't have any slashes. */
if (len_ptr) {
const char *p = merge_file + *len_ptr;
while (--p > merge_file && *p != '/') {}
if (p == merge_file) {
strlcpy(buf, merge_file, *len_ptr + 1);
return buf;
}
} else if (strchr(merge_file, '/') == NULL)
return (char *)merge_file;
}
fn = *merge_file == '/' ? buf : tmpbuf;
if (sanitize_paths) {
const char *r = prefix_skip ? "/" : NULL;
/* null-terminate the name if it isn't already */
if (len_ptr && merge_file[*len_ptr]) {
char *to = fn == buf ? tmpbuf : buf;
strlcpy(to, merge_file, *len_ptr + 1);
merge_file = to;
}
if (!sanitize_path(fn, merge_file, r, dirbuf_depth, SP_DEFAULT)) {
rprintf(FERROR, "merge-file name overflows: %s\n",
merge_file);
return NULL;
}
fn_len = strlen(fn);
} else {
strlcpy(fn, merge_file, len_ptr ? *len_ptr + 1 : MAXPATHLEN);
fn_len = clean_fname(fn, CFN_COLLAPSE_DOT_DOT_DIRS);
}
/* If the name isn't in buf yet, it wasn't absolute. */
if (fn != buf) {
int d_len = dirbuf_len - prefix_skip;
if (d_len + fn_len >= MAXPATHLEN) {
rprintf(FERROR, "merge-file name overflows: %s\n", fn);
return NULL;
}
memcpy(buf, dirbuf + prefix_skip, d_len);
memcpy(buf + d_len, fn, fn_len + 1);
fn_len = clean_fname(buf, CFN_COLLAPSE_DOT_DOT_DIRS);
}
if (len_ptr)
*len_ptr = fn_len;
return buf;
}
/* Sets the dirbuf and dirbuf_len values. */
void set_filter_dir(const char *dir, unsigned int dirlen)
{
unsigned int len;
if (*dir != '/') {
memcpy(dirbuf, curr_dir, curr_dir_len);
dirbuf[curr_dir_len] = '/';
len = curr_dir_len + 1;
if (len + dirlen >= MAXPATHLEN)
dirlen = 0;
} else
len = 0;
memcpy(dirbuf + len, dir, dirlen);
dirbuf[dirlen + len] = '\0';
dirbuf_len = clean_fname(dirbuf, CFN_COLLAPSE_DOT_DOT_DIRS);
if (dirbuf_len > 1 && dirbuf[dirbuf_len-1] == '.'
&& dirbuf[dirbuf_len-2] == '/')
dirbuf_len -= 2;
if (dirbuf_len != 1)
dirbuf[dirbuf_len++] = '/';
dirbuf[dirbuf_len] = '\0';
if (sanitize_paths)
dirbuf_depth = count_dir_elements(dirbuf + module_dirlen);
}
/* This routine takes a per-dir merge-file entry and finishes its setup.
* If the name has a path portion then we check to see if it refers to a
* parent directory of the first transfer dir. If it does, we scan all the
* dirs from that point through the parent dir of the transfer dir looking
* for the per-dir merge-file in each one. */
static BOOL setup_merge_file(int mergelist_num, filter_rule *ex,
filter_rule_list *lp)
{
char buf[MAXPATHLEN];
char *x, *y, *pat = ex->pattern;
unsigned int len;
if (!(x = parse_merge_name(pat, NULL, 0)) || *x != '/')
return 0;
if (DEBUG_GTE(FILTER, 2)) {
rprintf(FINFO, "[%s] performing parent_dirscan for mergelist #%d%s\n",
who_am_i(), mergelist_num, lp->debug_type);
}
y = strrchr(x, '/');
*y = '\0';
ex->pattern = strdup(y+1);
if (!*x)
x = "/";
if (*x == '/')
strlcpy(buf, x, MAXPATHLEN);
else
pathjoin(buf, MAXPATHLEN, dirbuf, x);
len = clean_fname(buf, CFN_COLLAPSE_DOT_DOT_DIRS);
if (len != 1 && len < MAXPATHLEN-1) {
buf[len++] = '/';
buf[len] = '\0';
}
/* This ensures that the specified dir is a parent of the transfer. */
for (x = buf, y = dirbuf; *x && *x == *y; x++, y++) {}
if (*x)
y += strlen(y); /* nope -- skip the scan */
parent_dirscan = True;
while (*y) {
char save[MAXPATHLEN];
strlcpy(save, y, MAXPATHLEN);
*y = '\0';
dirbuf_len = y - dirbuf;
strlcpy(x, ex->pattern, MAXPATHLEN - (x - buf));
parse_filter_file(lp, buf, ex, XFLG_ANCHORED2ABS);
if (ex->rflags & FILTRULE_NO_INHERIT) {
/* Free the undesired rules to clean up any per-dir
* mergelists they defined. Otherwise pop_local_filters
* may crash trying to restore nonexistent state for
* those mergelists. */
free_filters(lp->head);
lp->head = NULL;
}
lp->tail = NULL;
strlcpy(y, save, MAXPATHLEN);
while ((*x++ = *y++) != '/') {}
}
parent_dirscan = False;
if (DEBUG_GTE(FILTER, 2)) {
rprintf(FINFO, "[%s] completed parent_dirscan for mergelist #%d%s\n",
who_am_i(), mergelist_num, lp->debug_type);
}
free(pat);
return 1;
}
struct local_filter_state {
int mergelist_cnt;
filter_rule_list mergelists[1];
};
/* Each time rsync changes to a new directory it call this function to
* handle all the per-dir merge-files. The "dir" value is the current path
* relative to curr_dir (which might not be null-terminated). We copy it
* into dirbuf so that we can easily append a file name on the end. */
void *push_local_filters(const char *dir, unsigned int dirlen)
{
struct local_filter_state *push;
int i;
set_filter_dir(dir, dirlen);
if (DEBUG_GTE(FILTER, 2)) {
rprintf(FINFO, "[%s] pushing local filters for %s\n",
who_am_i(), dirbuf);
}
if (!mergelist_cnt) {
/* No old state to save and no new merge files to push. */
return NULL;
}
push = (struct local_filter_state *)new_array(char,
sizeof (struct local_filter_state)
+ (mergelist_cnt-1) * sizeof (filter_rule_list));
push->mergelist_cnt = mergelist_cnt;
for (i = 0; i < mergelist_cnt; i++) {
filter_rule *ex = mergelist_parents[i];
if (!ex)
continue;
memcpy(&push->mergelists[i], ex->u.mergelist, sizeof (filter_rule_list));
}
/* Note: parse_filter_file() might increase mergelist_cnt, so keep
* this loop separate from the above loop. */
for (i = 0; i < mergelist_cnt; i++) {
filter_rule *ex = mergelist_parents[i];
filter_rule_list *lp;
if (!ex)
continue;
lp = ex->u.mergelist;
if (DEBUG_GTE(FILTER, 2)) {
rprintf(FINFO, "[%s] pushing mergelist #%d%s\n",
who_am_i(), i, lp->debug_type);
}
lp->tail = NULL; /* Switch any local rules to inherited. */
if (ex->rflags & FILTRULE_NO_INHERIT)
lp->head = NULL;
if (ex->rflags & FILTRULE_FINISH_SETUP) {
ex->rflags &= ~FILTRULE_FINISH_SETUP;
if (setup_merge_file(i, ex, lp))
set_filter_dir(dir, dirlen);
}
if (strlcpy(dirbuf + dirbuf_len, ex->pattern,
MAXPATHLEN - dirbuf_len) < MAXPATHLEN - dirbuf_len) {
parse_filter_file(lp, dirbuf, ex,
XFLG_ANCHORED2ABS);
} else {
io_error |= IOERR_GENERAL;
rprintf(FERROR,
"cannot add local filter rules in long-named directory: %s\n",
full_fname(dirbuf));
}
dirbuf[dirbuf_len] = '\0';
}
return (void*)push;
}
void pop_local_filters(void *mem)
{
struct local_filter_state *pop = (struct local_filter_state *)mem;
int i;
int old_mergelist_cnt = pop ? pop->mergelist_cnt : 0;
if (DEBUG_GTE(FILTER, 2))
rprintf(FINFO, "[%s] popping local filters\n", who_am_i());
for (i = mergelist_cnt; i-- > 0; ) {
filter_rule *ex = mergelist_parents[i];
filter_rule_list *lp;
if (!ex)
continue;
lp = ex->u.mergelist;
if (DEBUG_GTE(FILTER, 2)) {
rprintf(FINFO, "[%s] popping mergelist #%d%s\n",
who_am_i(), i, lp->debug_type);
}
pop_filter_list(lp);
if (i >= old_mergelist_cnt && lp->head) {
/* This mergelist does not exist in the state to be restored, but it
* still has inherited rules. This can sometimes happen if a per-dir
* merge file calls setup_merge_file() in push_local_filters() and that
* leaves some inherited rules that aren't in the pushed list state. */
if (DEBUG_GTE(FILTER, 2)) {
rprintf(FINFO, "[%s] freeing parent_dirscan filters of mergelist #%d%s\n",
who_am_i(), i, ex->u.mergelist->debug_type);
}
pop_filter_list(lp);
}
}
if (!pop)
return; /* No state to restore. */
for (i = 0; i < old_mergelist_cnt; i++) {
filter_rule *ex = mergelist_parents[i];
if (!ex)
continue;
memcpy(ex->u.mergelist, &pop->mergelists[i], sizeof (filter_rule_list));
}
free(pop);
}
void change_local_filter_dir(const char *dname, int dlen, int dir_depth)
{
static int cur_depth = -1;
static void *filt_array[MAXPATHLEN/2+1];
if (!dname) {
for ( ; cur_depth >= 0; cur_depth--) {
if (filt_array[cur_depth]) {
pop_local_filters(filt_array[cur_depth]);
filt_array[cur_depth] = NULL;
}
}
return;
}
assert(dir_depth < MAXPATHLEN/2+1);
for ( ; cur_depth >= dir_depth; cur_depth--) {
if (filt_array[cur_depth]) {
pop_local_filters(filt_array[cur_depth]);
filt_array[cur_depth] = NULL;
}
}
cur_depth = dir_depth;
filt_array[cur_depth] = push_local_filters(dname, dlen);
}
static int rule_matches(const char *fname, filter_rule *ex, int name_flags)
{
int slash_handling, str_cnt = 0, anchored_match = 0;
int ret_match = ex->rflags & FILTRULE_NEGATE ? 0 : 1;
char *p, *pattern = ex->pattern;
const char *strings[16]; /* more than enough */
const char *name = fname + (*fname == '/');
if (!*name)
return 0;
if (!(name_flags & NAME_IS_XATTR) ^ !(ex->rflags & FILTRULE_XATTR))
return 0;
if (!ex->u.slash_cnt && !(ex->rflags & FILTRULE_WILD2)) {
/* If the pattern does not have any slashes AND it does
* not have a "**" (which could match a slash), then we
* just match the name portion of the path. */
if ((p = strrchr(name,'/')) != NULL)
name = p+1;
} else if (ex->rflags & FILTRULE_ABS_PATH && *fname != '/'
&& curr_dir_len > module_dirlen + 1) {
/* If we're matching against an absolute-path pattern,
* we need to prepend our full path info. */
strings[str_cnt++] = curr_dir + module_dirlen + 1;
strings[str_cnt++] = "/";
} else if (ex->rflags & FILTRULE_WILD2_PREFIX && *fname != '/') {
/* Allow "**"+"/" to match at the start of the string. */
strings[str_cnt++] = "/";
}
strings[str_cnt++] = name;
if (name_flags & NAME_IS_DIR) {
/* Allow a trailing "/"+"***" to match the directory. */
if (ex->rflags & FILTRULE_WILD3_SUFFIX)
strings[str_cnt++] = "/";
} else if (ex->rflags & FILTRULE_DIRECTORY)
return !ret_match;
strings[str_cnt] = NULL;
if (*pattern == '/') {
anchored_match = 1;
pattern++;
}
if (!anchored_match && ex->u.slash_cnt
&& !(ex->rflags & FILTRULE_WILD2)) {
/* A non-anchored match with an infix slash and no "**"
* needs to match the last slash_cnt+1 name elements. */
slash_handling = ex->u.slash_cnt + 1;
} else if (!anchored_match && !(ex->rflags & FILTRULE_WILD2_PREFIX)
&& ex->rflags & FILTRULE_WILD2) {
/* A non-anchored match with an infix or trailing "**" (but not
* a prefixed "**") needs to try matching after every slash. */
slash_handling = -1;
} else {
/* The pattern matches only at the start of the path or name. */
slash_handling = 0;
}
if (ex->rflags & FILTRULE_WILD) {
if (wildmatch_array(pattern, strings, slash_handling))
return ret_match;
} else if (str_cnt > 1) {
if (litmatch_array(pattern, strings, slash_handling))
return ret_match;
} else if (anchored_match) {
if (strcmp(name, pattern) == 0)
return ret_match;
} else {
int l1 = strlen(name);
int l2 = strlen(pattern);
if (l2 <= l1 &&
strcmp(name+(l1-l2),pattern) == 0 &&
(l1==l2 || name[l1-(l2+1)] == '/')) {
return ret_match;
}
}
return !ret_match;
}
static void report_filter_result(enum logcode code, char const *name,
filter_rule const *ent,
int name_flags, const char *type)
{
/* If a trailing slash is present to match only directories,
* then it is stripped out by add_rule(). So as a special
* case we add it back in here. */
if (DEBUG_GTE(FILTER, 1)) {
static char *actions[2][2]
= { {"show", "hid"}, {"risk", "protect"} };
const char *w = who_am_i();
const char *t = name_flags & NAME_IS_XATTR ? "xattr"
: name_flags & NAME_IS_DIR ? "directory"
: "file";
rprintf(code, "[%s] %sing %s %s because of pattern %s%s%s\n",
w, actions[*w!='s'][!(ent->rflags & FILTRULE_INCLUDE)],
t, name, ent->pattern,
ent->rflags & FILTRULE_DIRECTORY ? "/" : "", type);
}
}
/* This function is used to check if a file should be included/excluded
* from the list of files based on its name and type etc. The value of
* filter_level is set to either SERVER_FILTERS or ALL_FILTERS. */
int name_is_excluded(const char *fname, int name_flags, int filter_level)
{
if (daemon_filter_list.head && check_filter(&daemon_filter_list, FLOG, fname, name_flags) < 0) {
if (!(name_flags & NAME_IS_XATTR))
errno = ENOENT;
return 1;
}
if (filter_level != ALL_FILTERS)
return 0;
if (filter_list.head && check_filter(&filter_list, FINFO, fname, name_flags) < 0)
return 1;
return 0;
}
/* Return -1 if file "name" is defined to be excluded by the specified
* exclude list, 1 if it is included, and 0 if it was not matched. */
int check_filter(filter_rule_list *listp, enum logcode code,
const char *name, int name_flags)
{
filter_rule *ent;
for (ent = listp->head; ent; ent = ent->next) {
if (ignore_perishable && ent->rflags & FILTRULE_PERISHABLE)
continue;
if (ent->rflags & FILTRULE_PERDIR_MERGE) {
int rc = check_filter(ent->u.mergelist, code, name, name_flags);
if (rc)
return rc;
continue;
}
if (ent->rflags & FILTRULE_CVS_IGNORE) {
int rc = check_filter(&cvs_filter_list, code, name, name_flags);
if (rc)
return rc;
continue;
}
if (rule_matches(name, ent, name_flags)) {
report_filter_result(code, name, ent, name_flags, listp->debug_type);
return ent->rflags & FILTRULE_INCLUDE ? 1 : -1;
}
}
return 0;
}
#define RULE_STRCMP(s,r) rule_strcmp((s), (r), sizeof (r) - 1)
static const uchar *rule_strcmp(const uchar *str, const char *rule, int rule_len)
{
if (strncmp((char*)str, rule, rule_len) != 0)
return NULL;
if (isspace(str[rule_len]) || str[rule_len] == '_' || !str[rule_len])
return str + rule_len - 1;
if (str[rule_len] == ',')
return str + rule_len;
return NULL;
}
#define FILTRULES_FROM_CONTAINER (FILTRULE_ABS_PATH | FILTRULE_INCLUDE \
| FILTRULE_DIRECTORY | FILTRULE_NEGATE \
| FILTRULE_PERISHABLE)
/* Gets the next include/exclude rule from *rulestr_ptr and advances
* *rulestr_ptr to point beyond it. Stores the pattern's start (within
* *rulestr_ptr) and length in *pat_ptr and *pat_len_ptr, and returns a newly
* allocated filter_rule containing the rest of the information. Returns
* NULL if there are no more rules in the input.
*
* The template provides defaults for the new rule to inherit, and the
* template rflags and the xflags additionally affect parsing. */
static filter_rule *parse_rule_tok(const char **rulestr_ptr,
const filter_rule *template, int xflags,
const char **pat_ptr, unsigned int *pat_len_ptr)
{
const uchar *s = (const uchar *)*rulestr_ptr;
filter_rule *rule;
unsigned int len;
if (template->rflags & FILTRULE_WORD_SPLIT) {
/* Skip over any initial whitespace. */
while (isspace(*s))
s++;
/* Update to point to real start of rule. */
*rulestr_ptr = (const char *)s;
}
if (!*s)
return NULL;
rule = new0(filter_rule);
/* Inherit from the template. Don't inherit FILTRULES_SIDES; we check
* that later. */
rule->rflags = template->rflags & FILTRULES_FROM_CONTAINER;
/* Figure out what kind of a filter rule "s" is pointing at. Note
* that if FILTRULE_NO_PREFIXES is set, the rule is either an include
* or an exclude based on the inheritance of the FILTRULE_INCLUDE
* flag (above). XFLG_OLD_PREFIXES indicates a compatibility mode
* for old include/exclude patterns where just "+ " and "- " are
* allowed as optional prefixes. */
if (template->rflags & FILTRULE_NO_PREFIXES) {
if (*s == '!' && template->rflags & FILTRULE_CVS_IGNORE)
rule->rflags |= FILTRULE_CLEAR_LIST; /* Tentative! */
} else if (xflags & XFLG_OLD_PREFIXES) {
if (*s == '-' && s[1] == ' ') {
rule->rflags &= ~FILTRULE_INCLUDE;
s += 2;
} else if (*s == '+' && s[1] == ' ') {
rule->rflags |= FILTRULE_INCLUDE;
s += 2;
} else if (*s == '!')
rule->rflags |= FILTRULE_CLEAR_LIST; /* Tentative! */
} else {
char ch = 0;
BOOL prefix_specifies_side = False;
switch (*s) {
case 'c':
if ((s = RULE_STRCMP(s, "clear")) != NULL)
ch = '!';
break;
case 'd':
if ((s = RULE_STRCMP(s, "dir-merge")) != NULL)
ch = ':';
break;
case 'e':
if ((s = RULE_STRCMP(s, "exclude")) != NULL)
ch = '-';
break;
case 'h':
if ((s = RULE_STRCMP(s, "hide")) != NULL)
ch = 'H';
break;
case 'i':
if ((s = RULE_STRCMP(s, "include")) != NULL)
ch = '+';
break;
case 'm':
if ((s = RULE_STRCMP(s, "merge")) != NULL)
ch = '.';
break;
case 'p':
if ((s = RULE_STRCMP(s, "protect")) != NULL)
ch = 'P';
break;
case 'r':
if ((s = RULE_STRCMP(s, "risk")) != NULL)
ch = 'R';
break;
case 's':
if ((s = RULE_STRCMP(s, "show")) != NULL)
ch = 'S';
break;
default:
ch = *s;
if (s[1] == ',')
s++;
break;
}
switch (ch) {
case ':':
rule->rflags |= FILTRULE_PERDIR_MERGE
| FILTRULE_FINISH_SETUP;
/* FALL THROUGH */
case '.':
rule->rflags |= FILTRULE_MERGE_FILE;
break;
case '+':
rule->rflags |= FILTRULE_INCLUDE;
break;
case '-':
break;
case 'S':
rule->rflags |= FILTRULE_INCLUDE;
/* FALL THROUGH */
case 'H':
rule->rflags |= FILTRULE_SENDER_SIDE;
prefix_specifies_side = True;
break;
case 'R':
rule->rflags |= FILTRULE_INCLUDE;
/* FALL THROUGH */
case 'P':
rule->rflags |= FILTRULE_RECEIVER_SIDE;
prefix_specifies_side = True;
break;
case '!':
rule->rflags |= FILTRULE_CLEAR_LIST;
break;
default:
rprintf(FERROR, "Unknown filter rule: `%s'\n", *rulestr_ptr);
exit_cleanup(RERR_SYNTAX);
}
while (ch != '!' && *++s && *s != ' ' && *s != '_') {
if (template->rflags & FILTRULE_WORD_SPLIT && isspace(*s)) {
s--;
break;
}
switch (*s) {
default:
invalid:
rprintf(FERROR,
"invalid modifier '%c' at position %d in filter rule: %s\n",
*s, (int)(s - (const uchar *)*rulestr_ptr), *rulestr_ptr);
exit_cleanup(RERR_SYNTAX);
case '-':
if (!BITS_SETnUNSET(rule->rflags, FILTRULE_MERGE_FILE, FILTRULE_NO_PREFIXES))
goto invalid;
rule->rflags |= FILTRULE_NO_PREFIXES;
break;
case '+':
if (!BITS_SETnUNSET(rule->rflags, FILTRULE_MERGE_FILE, FILTRULE_NO_PREFIXES))
goto invalid;
rule->rflags |= FILTRULE_NO_PREFIXES
| FILTRULE_INCLUDE;
break;
case '/':
rule->rflags |= FILTRULE_ABS_PATH;
break;
case '!':
/* Negation really goes with the pattern, so it
* isn't useful as a merge-file default. */
if (rule->rflags & FILTRULE_MERGE_FILE)
goto invalid;
rule->rflags |= FILTRULE_NEGATE;
break;
case 'C':
if (rule->rflags & FILTRULE_NO_PREFIXES || prefix_specifies_side)
goto invalid;
rule->rflags |= FILTRULE_NO_PREFIXES
| FILTRULE_WORD_SPLIT
| FILTRULE_NO_INHERIT
| FILTRULE_CVS_IGNORE;
break;
case 'e':
if (!(rule->rflags & FILTRULE_MERGE_FILE))
goto invalid;
rule->rflags |= FILTRULE_EXCLUDE_SELF;
break;
case 'n':
if (!(rule->rflags & FILTRULE_MERGE_FILE))
goto invalid;
rule->rflags |= FILTRULE_NO_INHERIT;
break;
case 'p':
rule->rflags |= FILTRULE_PERISHABLE;
break;
case 'r':
if (prefix_specifies_side)
goto invalid;
rule->rflags |= FILTRULE_RECEIVER_SIDE;
break;
case 's':
if (prefix_specifies_side)
goto invalid;
rule->rflags |= FILTRULE_SENDER_SIDE;
break;
case 'w':
if (!(rule->rflags & FILTRULE_MERGE_FILE))
goto invalid;
rule->rflags |= FILTRULE_WORD_SPLIT;
break;
case 'x':
rule->rflags |= FILTRULE_XATTR;
saw_xattr_filter = 1;
break;
}
}
if (*s)