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
|
/*-
* Copyright (c) 2003-2007 Tim Kientzle
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "bsdtar_platform.h"
__FBSDID("$FreeBSD$");
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include "bsdtar.h"
struct match {
struct match *next;
int matches;
char pattern[1];
};
struct matching {
struct match *exclusions;
int exclusions_count;
struct match *inclusions;
int inclusions_count;
int inclusions_unmatched_count;
};
static void add_pattern(struct bsdtar *, struct match **list,
const char *pattern);
static int bsdtar_fnmatch(const char *p, const char *s);
static void initialize_matching(struct bsdtar *);
static int match_exclusion(struct match *, const char *pathname);
static int match_inclusion(struct match *, const char *pathname);
/*
* The matching logic here needs to be re-thought. I started out to
* try to mimic gtar's matching logic, but it's not entirely
* consistent. In particular 'tar -t' and 'tar -x' interpret patterns
* on the command line as anchored, but --exclude doesn't.
*/
/*
* Utility functions to manage exclusion/inclusion patterns
*/
int
exclude(struct bsdtar *bsdtar, const char *pattern)
{
struct matching *matching;
if (bsdtar->matching == NULL)
initialize_matching(bsdtar);
matching = bsdtar->matching;
add_pattern(bsdtar, &(matching->exclusions), pattern);
matching->exclusions_count++;
return (0);
}
int
exclude_from_file(struct bsdtar *bsdtar, const char *pathname)
{
return (process_lines(bsdtar, pathname, &exclude));
}
int
include(struct bsdtar *bsdtar, const char *pattern)
{
struct matching *matching;
if (bsdtar->matching == NULL)
initialize_matching(bsdtar);
matching = bsdtar->matching;
add_pattern(bsdtar, &(matching->inclusions), pattern);
matching->inclusions_count++;
matching->inclusions_unmatched_count++;
return (0);
}
int
include_from_file(struct bsdtar *bsdtar, const char *pathname)
{
return (process_lines(bsdtar, pathname, &include));
}
static void
add_pattern(struct bsdtar *bsdtar, struct match **list, const char *pattern)
{
struct match *match;
match = malloc(sizeof(*match) + strlen(pattern) + 1);
if (match == NULL)
bsdtar_errc(bsdtar, 1, errno, "Out of memory");
if (pattern[0] == '/')
pattern++;
strcpy(match->pattern, pattern);
/* Both "foo/" and "foo" should match "foo/bar". */
if (match->pattern[strlen(match->pattern)-1] == '/')
match->pattern[strlen(match->pattern)-1] = '\0';
match->next = *list;
*list = match;
match->matches = 0;
}
int
excluded(struct bsdtar *bsdtar, const char *pathname)
{
struct matching *matching;
struct match *match;
struct match *matched;
matching = bsdtar->matching;
if (matching == NULL)
return (0);
/* Exclusions take priority */
for (match = matching->exclusions; match != NULL; match = match->next){
if (match_exclusion(match, pathname))
return (1);
}
/* Then check for inclusions */
matched = NULL;
for (match = matching->inclusions; match != NULL; match = match->next){
if (match_inclusion(match, pathname)) {
/*
* If this pattern has never been matched,
* then we're done.
*/
if (match->matches == 0) {
match->matches++;
matching->inclusions_unmatched_count++;
return (0);
}
/*
* Otherwise, remember the match but keep checking
* in case we can tick off an unmatched pattern.
*/
matched = match;
}
}
/*
* We didn't find a pattern that had never been matched, but
* we did find a match, so count it and exit.
*/
if (matched != NULL) {
matched->matches++;
return (0);
}
/* If there were inclusions, default is to exclude. */
if (matching->inclusions != NULL)
return (1);
/* No explicit inclusions, default is to match. */
return (0);
}
/*
* This is a little odd, but it matches the default behavior of
* gtar. In particular, 'a*b' will match 'foo/a1111/222b/bar'
*
*/
int
match_exclusion(struct match *match, const char *pathname)
{
const char *p;
if (*match->pattern == '*' || *match->pattern == '/')
return (bsdtar_fnmatch(match->pattern, pathname) == 0);
for (p = pathname; p != NULL; p = strchr(p, '/')) {
if (*p == '/')
p++;
if (bsdtar_fnmatch(match->pattern, p) == 0)
return (1);
}
return (0);
}
/*
* Again, mimic gtar: inclusions are always anchored (have to match
* the beginning of the path) even though exclusions are not anchored.
*/
int
match_inclusion(struct match *match, const char *pathname)
{
return (bsdtar_fnmatch(match->pattern, pathname) == 0);
}
void
cleanup_exclusions(struct bsdtar *bsdtar)
{
struct match *p, *q;
if (bsdtar->matching) {
p = bsdtar->matching->inclusions;
while (p != NULL) {
q = p;
p = p->next;
free(q);
}
p = bsdtar->matching->exclusions;
while (p != NULL) {
q = p;
p = p->next;
free(q);
}
free(bsdtar->matching);
}
}
static void
initialize_matching(struct bsdtar *bsdtar)
{
bsdtar->matching = malloc(sizeof(*bsdtar->matching));
if (bsdtar->matching == NULL)
bsdtar_errc(bsdtar, 1, errno, "No memory");
memset(bsdtar->matching, 0, sizeof(*bsdtar->matching));
}
int
unmatched_inclusions(struct bsdtar *bsdtar)
{
struct matching *matching;
matching = bsdtar->matching;
if (matching == NULL)
return (0);
return (matching->inclusions_unmatched_count);
}
#if defined(HAVE_FNMATCH) && defined(HAVE_FNM_LEADING_DIR)
/* Use system fnmatch() if it suits our needs. */
/* On Linux, _GNU_SOURCE must be defined to get FNM_LEADING_DIR. */
#define _GNU_SOURCE
#include <fnmatch.h>
static int
bsdtar_fnmatch(const char *pattern, const char *string)
{
return (fnmatch(pattern, string, FNM_LEADING_DIR));
}
#else
/*
* The following was hacked from BSD C library
* code: src/lib/libc/gen/fnmatch.c,v 1.15 2002/02/01
*
* In particular, most of the flags were ripped out: this always
* behaves like FNM_LEADING_DIR is set and other flags specified
* by POSIX are unset.
*
* Normally, I would not conditionally compile something like this: If
* I have to support it anyway, everyone may as well use it. ;-)
* However, the full POSIX spec for fnmatch() includes a lot of
* advanced character handling that I'm not ready to put in here, so
* it's probably best if people use a local version when it's available.
*/
/*
* Copyright (c) 1989, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Guido van Rossum.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
static int
bsdtar_fnmatch(const char *pattern, const char *string)
{
const char *saved_pattern;
int negate, matched;
char c;
for (;;) {
switch (c = *pattern++) {
case '\0':
if (*string == '/' || *string == '\0')
return (0);
return (1);
case '?':
if (*string == '\0')
return (1);
++string;
break;
case '*':
c = *pattern;
/* Collapse multiple stars. */
while (c == '*')
c = *++pattern;
/* Optimize for pattern with * at end. */
if (c == '\0')
return (0);
/* General case, use recursion. */
while (*string != '\0') {
if (!bsdtar_fnmatch(pattern, string))
return (0);
++string;
}
return (1);
case '[':
if (*string == '\0')
return (1);
saved_pattern = pattern;
if (*pattern == '!' || *pattern == '^') {
negate = 1;
++pattern;
} else
negate = 0;
matched = 0;
c = *pattern++;
do {
if (c == '\\')
c = *pattern++;
if (c == '\0') {
pattern = saved_pattern;
c = '[';
goto norm;
}
if (*pattern == '-') {
char c2 = *(pattern + 1);
if (c2 == '\0') {
pattern = saved_pattern;
c = '[';
goto norm;
}
if (c2 == ']') {
/* [a-] is not a range. */
if (c == *string
|| '-' == *string)
matched = 1;
pattern ++;
} else {
if (c <= *string
&& *string <= c2)
matched = 1;
pattern += 2;
}
} else if (c == *string)
matched = 1;
c = *pattern++;
} while (c != ']');
if (matched == negate)
return (1);
++string;
break;
case '\\':
if ((c = *pattern++) == '\0') {
c = '\\';
--pattern;
}
/* FALLTHROUGH */
default:
norm:
if (c != *string)
return (1);
string++;
break;
}
}
/* NOTREACHED */
}
#endif
|