2
* Copyright (c) 2003-2008 Tim Kientzle
5
* Redistribution and use in source and binary forms, with or without
6
* modification, are permitted provided that the following conditions
8
* 1. Redistributions of source code must retain the above copyright
9
* notice, this list of conditions and the following disclaimer.
10
* 2. Redistributions in binary form must reproduce the above copyright
11
* notice, this list of conditions and the following disclaimer in the
12
* documentation and/or other materials provided with the distribution.
14
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
15
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17
* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
18
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25
* $FreeBSD: head/lib/libarchive/archive_entry.h 201096 2009-12-28 02:41:27Z kientzle $
28
#ifndef ARCHIVE_ENTRY_H_INCLUDED
29
#define ARCHIVE_ENTRY_H_INCLUDED
32
* Note: archive_entry.h is for use outside of libarchive; the
33
* configuration headers (config.h, archive_platform.h, etc.) are
34
* purely internal. Do NOT use HAVE_XXX configuration macros to
35
* control the behavior of this header! If you must conditionalize,
36
* use predefined compiler and/or platform macros.
39
#include <sys/types.h>
40
#include <stddef.h> /* for wchar_t */
43
#if defined(_WIN32) && !defined(__CYGWIN__)
47
/* Get appropriate definitions of standard POSIX-style types. */
48
/* These should match the types used in 'struct stat' */
49
#if defined(_WIN32) && !defined(__CYGWIN__)
50
#define __LA_INT64_T __int64
51
# if defined(__BORLANDC__)
52
# define __LA_UID_T uid_t
53
# define __LA_GID_T gid_t
54
# define __LA_DEV_T dev_t
55
# define __LA_MODE_T mode_t
57
# define __LA_UID_T short
58
# define __LA_GID_T short
59
# define __LA_DEV_T unsigned int
60
# define __LA_MODE_T unsigned short
64
#define __LA_INT64_T int64_t
65
#define __LA_UID_T uid_t
66
#define __LA_GID_T gid_t
67
#define __LA_DEV_T dev_t
68
#define __LA_MODE_T mode_t
72
* XXX Is this defined for all Windows compilers? If so, in what
73
* header? It would be nice to remove the __LA_INO_T indirection and
74
* just use plain ino_t everywhere. Likewise for the other types just
77
#define __LA_INO_T ino_t
81
* On Windows, define LIBARCHIVE_STATIC if you're building or using a
82
* .lib. The default here assumes you're building a DLL. Only
83
* libarchive source should ever define __LIBARCHIVE_BUILD.
85
#if ((defined __WIN32__) || (defined _WIN32) || defined(__CYGWIN__)) && (!defined LIBARCHIVE_STATIC)
86
# ifdef __LIBARCHIVE_BUILD
88
# define __LA_DECL __attribute__((dllexport)) extern
90
# define __LA_DECL __declspec(dllexport)
94
# define __LA_DECL __attribute__((dllimport)) extern
96
# define __LA_DECL __declspec(dllimport)
100
/* Static libraries on all platforms and shared libraries on non-Windows. */
109
* Description of an archive entry.
111
* You can think of this as "struct stat" with some text fields added in.
113
* TODO: Add "comment", "charset", and possibly other entries that are
114
* supported by "pax interchange" format. However, GNU, ustar, cpio,
115
* and other variants don't support these features, so they're not an
116
* excruciatingly high priority right now.
118
* TODO: "pax interchange" format allows essentially arbitrary
119
* key/value attributes to be attached to any entry. Supporting
120
* such extensions may make this library useful for special
121
* applications (e.g., a package manager could attach special
122
* package-management attributes to each entry).
124
struct archive_entry;
127
* File-type constants. These are returned from archive_entry_filetype()
128
* and passed to archive_entry_set_filetype().
130
* These values match S_XXX defines on every platform I've checked,
131
* including Windows, AIX, Linux, Solaris, and BSD. They're
132
* (re)defined here because platforms generally don't define the ones
133
* they don't support. For example, Windows doesn't define S_IFLNK or
134
* S_IFBLK. Instead of having a mass of conditional logic and system
135
* checks to define any S_XXX values that aren't supported locally,
136
* I've just defined a new set of such constants so that
137
* libarchive-based applications can manipulate and identify archive
138
* entries properly even if the hosting platform can't store them on
141
* These values are also used directly within some portable formats,
142
* such as cpio. If you find a platform that varies from these, the
143
* correct solution is to leave these alone and translate from these
144
* portable values to platform-native values when entries are read from
145
* or written to disk.
147
#define AE_IFMT 0170000
148
#define AE_IFREG 0100000
149
#define AE_IFLNK 0120000
150
#define AE_IFSOCK 0140000
151
#define AE_IFCHR 0020000
152
#define AE_IFBLK 0060000
153
#define AE_IFDIR 0040000
154
#define AE_IFIFO 0010000
157
* Basic object manipulation
160
__LA_DECL struct archive_entry *archive_entry_clear(struct archive_entry *);
161
/* The 'clone' function does a deep copy; all of the strings are copied too. */
162
__LA_DECL struct archive_entry *archive_entry_clone(struct archive_entry *);
163
__LA_DECL void archive_entry_free(struct archive_entry *);
164
__LA_DECL struct archive_entry *archive_entry_new(void);
167
* Retrieve fields from an archive_entry.
169
* There are a number of implicit conversions among these fields. For
170
* example, if a regular string field is set and you read the _w wide
171
* character field, the entry will implicitly convert narrow-to-wide
172
* using the current locale. Similarly, dev values are automatically
173
* updated when you write devmajor or devminor and vice versa.
175
* In addition, fields can be "set" or "unset." Unset string fields
176
* return NULL, non-string fields have _is_set() functions to test
177
* whether they've been set. You can "unset" a string field by
178
* assigning NULL; non-string fields have _unset() functions to
181
* Note: There is one ambiguity in the above; string fields will
182
* also return NULL when implicit character set conversions fail.
183
* This is usually what you want.
185
__LA_DECL time_t archive_entry_atime(struct archive_entry *);
186
__LA_DECL long archive_entry_atime_nsec(struct archive_entry *);
187
__LA_DECL int archive_entry_atime_is_set(struct archive_entry *);
188
__LA_DECL time_t archive_entry_birthtime(struct archive_entry *);
189
__LA_DECL long archive_entry_birthtime_nsec(struct archive_entry *);
190
__LA_DECL int archive_entry_birthtime_is_set(struct archive_entry *);
191
__LA_DECL time_t archive_entry_ctime(struct archive_entry *);
192
__LA_DECL long archive_entry_ctime_nsec(struct archive_entry *);
193
__LA_DECL int archive_entry_ctime_is_set(struct archive_entry *);
194
__LA_DECL dev_t archive_entry_dev(struct archive_entry *);
195
__LA_DECL dev_t archive_entry_devmajor(struct archive_entry *);
196
__LA_DECL dev_t archive_entry_devminor(struct archive_entry *);
197
__LA_DECL __LA_MODE_T archive_entry_filetype(struct archive_entry *);
198
__LA_DECL void archive_entry_fflags(struct archive_entry *,
199
unsigned long * /* set */,
200
unsigned long * /* clear */);
201
__LA_DECL const char *archive_entry_fflags_text(struct archive_entry *);
202
__LA_DECL __LA_GID_T archive_entry_gid(struct archive_entry *);
203
__LA_DECL const char *archive_entry_gname(struct archive_entry *);
204
__LA_DECL const wchar_t *archive_entry_gname_w(struct archive_entry *);
205
__LA_DECL const char *archive_entry_hardlink(struct archive_entry *);
206
__LA_DECL const wchar_t *archive_entry_hardlink_w(struct archive_entry *);
207
__LA_DECL __LA_INO_T archive_entry_ino(struct archive_entry *);
208
__LA_DECL __LA_INT64_T archive_entry_ino64(struct archive_entry *);
209
__LA_DECL __LA_MODE_T archive_entry_mode(struct archive_entry *);
210
__LA_DECL time_t archive_entry_mtime(struct archive_entry *);
211
__LA_DECL long archive_entry_mtime_nsec(struct archive_entry *);
212
__LA_DECL int archive_entry_mtime_is_set(struct archive_entry *);
213
__LA_DECL unsigned int archive_entry_nlink(struct archive_entry *);
214
__LA_DECL const char *archive_entry_pathname(struct archive_entry *);
215
__LA_DECL const wchar_t *archive_entry_pathname_w(struct archive_entry *);
216
__LA_DECL dev_t archive_entry_rdev(struct archive_entry *);
217
__LA_DECL dev_t archive_entry_rdevmajor(struct archive_entry *);
218
__LA_DECL dev_t archive_entry_rdevminor(struct archive_entry *);
219
__LA_DECL const char *archive_entry_sourcepath(struct archive_entry *);
220
__LA_DECL __LA_INT64_T archive_entry_size(struct archive_entry *);
221
__LA_DECL int archive_entry_size_is_set(struct archive_entry *);
222
__LA_DECL const char *archive_entry_strmode(struct archive_entry *);
223
__LA_DECL const char *archive_entry_symlink(struct archive_entry *);
224
__LA_DECL const wchar_t *archive_entry_symlink_w(struct archive_entry *);
225
__LA_DECL __LA_UID_T archive_entry_uid(struct archive_entry *);
226
__LA_DECL const char *archive_entry_uname(struct archive_entry *);
227
__LA_DECL const wchar_t *archive_entry_uname_w(struct archive_entry *);
230
* Set fields in an archive_entry.
232
* Note that string 'set' functions do not copy the string, only the pointer.
233
* In contrast, 'copy' functions do copy the object pointed to.
235
* Note: As of libarchive 2.4, 'set' functions do copy the string and
236
* are therefore exact synonyms for the 'copy' versions. The 'copy'
237
* names will be retired in libarchive 3.0.
240
__LA_DECL void archive_entry_set_atime(struct archive_entry *, time_t, long);
241
__LA_DECL void archive_entry_unset_atime(struct archive_entry *);
242
#if defined(_WIN32) && !defined(__CYGWIN__)
243
__LA_DECL void archive_entry_copy_bhfi(struct archive_entry *,
244
BY_HANDLE_FILE_INFORMATION *);
246
__LA_DECL void archive_entry_set_birthtime(struct archive_entry *, time_t, long);
247
__LA_DECL void archive_entry_unset_birthtime(struct archive_entry *);
248
__LA_DECL void archive_entry_set_ctime(struct archive_entry *, time_t, long);
249
__LA_DECL void archive_entry_unset_ctime(struct archive_entry *);
250
__LA_DECL void archive_entry_set_dev(struct archive_entry *, dev_t);
251
__LA_DECL void archive_entry_set_devmajor(struct archive_entry *, dev_t);
252
__LA_DECL void archive_entry_set_devminor(struct archive_entry *, dev_t);
253
__LA_DECL void archive_entry_set_filetype(struct archive_entry *, unsigned int);
254
__LA_DECL void archive_entry_set_fflags(struct archive_entry *,
255
unsigned long /* set */, unsigned long /* clear */);
256
/* Returns pointer to start of first invalid token, or NULL if none. */
257
/* Note that all recognized tokens are processed, regardless. */
258
__LA_DECL const char *archive_entry_copy_fflags_text(struct archive_entry *,
260
__LA_DECL const wchar_t *archive_entry_copy_fflags_text_w(struct archive_entry *,
262
__LA_DECL void archive_entry_set_gid(struct archive_entry *, __LA_GID_T);
263
__LA_DECL void archive_entry_set_gname(struct archive_entry *, const char *);
264
__LA_DECL void archive_entry_copy_gname(struct archive_entry *, const char *);
265
__LA_DECL void archive_entry_copy_gname_w(struct archive_entry *, const wchar_t *);
266
__LA_DECL int archive_entry_update_gname_utf8(struct archive_entry *, const char *);
267
__LA_DECL void archive_entry_set_hardlink(struct archive_entry *, const char *);
268
__LA_DECL void archive_entry_copy_hardlink(struct archive_entry *, const char *);
269
__LA_DECL void archive_entry_copy_hardlink_w(struct archive_entry *, const wchar_t *);
270
__LA_DECL int archive_entry_update_hardlink_utf8(struct archive_entry *, const char *);
271
#if ARCHIVE_VERSION_NUMBER >= 3000000
272
/* Starting with libarchive 3.0, this will be synonym for ino64. */
273
__LA_DECL void archive_entry_set_ino(struct archive_entry *, __LA_INT64_T);
275
__LA_DECL void archive_entry_set_ino(struct archive_entry *, unsigned long);
277
__LA_DECL void archive_entry_set_ino64(struct archive_entry *, __LA_INT64_T);
278
__LA_DECL void archive_entry_set_link(struct archive_entry *, const char *);
279
__LA_DECL void archive_entry_copy_link(struct archive_entry *, const char *);
280
__LA_DECL void archive_entry_copy_link_w(struct archive_entry *, const wchar_t *);
281
__LA_DECL int archive_entry_update_link_utf8(struct archive_entry *, const char *);
282
__LA_DECL void archive_entry_set_mode(struct archive_entry *, __LA_MODE_T);
283
__LA_DECL void archive_entry_set_mtime(struct archive_entry *, time_t, long);
284
__LA_DECL void archive_entry_unset_mtime(struct archive_entry *);
285
__LA_DECL void archive_entry_set_nlink(struct archive_entry *, unsigned int);
286
__LA_DECL void archive_entry_set_pathname(struct archive_entry *, const char *);
287
__LA_DECL void archive_entry_copy_pathname(struct archive_entry *, const char *);
288
__LA_DECL void archive_entry_copy_pathname_w(struct archive_entry *, const wchar_t *);
289
__LA_DECL int archive_entry_update_pathname_utf8(struct archive_entry *, const char *);
290
__LA_DECL void archive_entry_set_perm(struct archive_entry *, __LA_MODE_T);
291
__LA_DECL void archive_entry_set_rdev(struct archive_entry *, dev_t);
292
__LA_DECL void archive_entry_set_rdevmajor(struct archive_entry *, dev_t);
293
__LA_DECL void archive_entry_set_rdevminor(struct archive_entry *, dev_t);
294
__LA_DECL void archive_entry_set_size(struct archive_entry *, __LA_INT64_T);
295
__LA_DECL void archive_entry_unset_size(struct archive_entry *);
296
__LA_DECL void archive_entry_copy_sourcepath(struct archive_entry *, const char *);
297
__LA_DECL void archive_entry_set_symlink(struct archive_entry *, const char *);
298
__LA_DECL void archive_entry_copy_symlink(struct archive_entry *, const char *);
299
__LA_DECL void archive_entry_copy_symlink_w(struct archive_entry *, const wchar_t *);
300
__LA_DECL int archive_entry_update_symlink_utf8(struct archive_entry *, const char *);
301
__LA_DECL void archive_entry_set_uid(struct archive_entry *, __LA_UID_T);
302
__LA_DECL void archive_entry_set_uname(struct archive_entry *, const char *);
303
__LA_DECL void archive_entry_copy_uname(struct archive_entry *, const char *);
304
__LA_DECL void archive_entry_copy_uname_w(struct archive_entry *, const wchar_t *);
305
__LA_DECL int archive_entry_update_uname_utf8(struct archive_entry *, const char *);
307
* Routines to bulk copy fields to/from a platform-native "struct
308
* stat." Libarchive used to just store a struct stat inside of each
309
* archive_entry object, but this created issues when trying to
310
* manipulate archives on systems different than the ones they were
313
* TODO: On Linux, provide both stat32 and stat64 versions of these functions.
315
__LA_DECL const struct stat *archive_entry_stat(struct archive_entry *);
316
__LA_DECL void archive_entry_copy_stat(struct archive_entry *, const struct stat *);
320
* ACL routines. This used to simply store and return text-format ACL
321
* strings, but that proved insufficient for a number of reasons:
322
* = clients need control over uname/uid and gname/gid mappings
323
* = there are many different ACL text formats
324
* = would like to be able to read/convert archives containing ACLs
325
* on platforms that lack ACL libraries
327
* This last point, in particular, forces me to implement a reasonably
328
* complete set of ACL support routines.
330
* TODO: Extend this to support NFSv4/NTFS permissions. That should
331
* allow full ACL support on Mac OS, in particular, which uses
332
* POSIX.1e-style interfaces to manipulate NFSv4/NTFS permissions.
336
* Permission bits mimic POSIX.1e. Note that I've not followed POSIX.1e's
337
* "permset"/"perm" abstract type nonsense. A permset is just a simple
338
* bitmap, following long-standing Unix tradition.
340
#define ARCHIVE_ENTRY_ACL_EXECUTE 1
341
#define ARCHIVE_ENTRY_ACL_WRITE 2
342
#define ARCHIVE_ENTRY_ACL_READ 4
344
/* We need to be able to specify either or both of these. */
345
#define ARCHIVE_ENTRY_ACL_TYPE_ACCESS 256
346
#define ARCHIVE_ENTRY_ACL_TYPE_DEFAULT 512
348
/* Tag values mimic POSIX.1e */
349
#define ARCHIVE_ENTRY_ACL_USER 10001 /* Specified user. */
350
#define ARCHIVE_ENTRY_ACL_USER_OBJ 10002 /* User who owns the file. */
351
#define ARCHIVE_ENTRY_ACL_GROUP 10003 /* Specified group. */
352
#define ARCHIVE_ENTRY_ACL_GROUP_OBJ 10004 /* Group who owns the file. */
353
#define ARCHIVE_ENTRY_ACL_MASK 10005 /* Modify group access. */
354
#define ARCHIVE_ENTRY_ACL_OTHER 10006 /* Public. */
357
* Set the ACL by clearing it and adding entries one at a time.
358
* Unlike the POSIX.1e ACL routines, you must specify the type
359
* (access/default) for each entry. Internally, the ACL data is just
360
* a soup of entries. API calls here allow you to retrieve just the
361
* entries of interest. This design (which goes against the spirit of
362
* POSIX.1e) is useful for handling archive formats that combine
363
* default and access information in a single ACL list.
365
__LA_DECL void archive_entry_acl_clear(struct archive_entry *);
366
__LA_DECL void archive_entry_acl_add_entry(struct archive_entry *,
367
int /* type */, int /* permset */, int /* tag */,
368
int /* qual */, const char * /* name */);
369
__LA_DECL void archive_entry_acl_add_entry_w(struct archive_entry *,
370
int /* type */, int /* permset */, int /* tag */,
371
int /* qual */, const wchar_t * /* name */);
374
* To retrieve the ACL, first "reset", then repeatedly ask for the
375
* "next" entry. The want_type parameter allows you to request only
376
* access entries or only default entries.
378
__LA_DECL int archive_entry_acl_reset(struct archive_entry *, int /* want_type */);
379
__LA_DECL int archive_entry_acl_next(struct archive_entry *, int /* want_type */,
380
int * /* type */, int * /* permset */, int * /* tag */,
381
int * /* qual */, const char ** /* name */);
382
__LA_DECL int archive_entry_acl_next_w(struct archive_entry *, int /* want_type */,
383
int * /* type */, int * /* permset */, int * /* tag */,
384
int * /* qual */, const wchar_t ** /* name */);
387
* Construct a text-format ACL. The flags argument is a bitmask that
388
* can include any of the following:
390
* ARCHIVE_ENTRY_ACL_TYPE_ACCESS - Include access entries.
391
* ARCHIVE_ENTRY_ACL_TYPE_DEFAULT - Include default entries.
392
* ARCHIVE_ENTRY_ACL_STYLE_EXTRA_ID - Include extra numeric ID field in
393
* each ACL entry. (As used by 'star'.)
394
* ARCHIVE_ENTRY_ACL_STYLE_MARK_DEFAULT - Include "default:" before each
397
#define ARCHIVE_ENTRY_ACL_STYLE_EXTRA_ID 1024
398
#define ARCHIVE_ENTRY_ACL_STYLE_MARK_DEFAULT 2048
399
__LA_DECL const wchar_t *archive_entry_acl_text_w(struct archive_entry *,
402
/* Return a count of entries matching 'want_type' */
403
__LA_DECL int archive_entry_acl_count(struct archive_entry *, int /* want_type */);
406
* Private ACL parser. This is private because it handles some
407
* very weird formats that clients should not be messing with.
408
* Clients should only deal with their platform-native formats.
409
* Because of the need to support many formats cleanly, new arguments
410
* are likely to get added on a regular basis. Clients who try to use
411
* this interface are likely to be surprised when it changes.
415
* TODO: Move this declaration out of the public header and into
416
* a private header. Warnings above are silly.
418
__LA_DECL int __archive_entry_acl_parse_w(struct archive_entry *,
419
const wchar_t *, int /* type */);
422
* extended attributes
425
__LA_DECL void archive_entry_xattr_clear(struct archive_entry *);
426
__LA_DECL void archive_entry_xattr_add_entry(struct archive_entry *,
427
const char * /* name */, const void * /* value */,
431
* To retrieve the xattr list, first "reset", then repeatedly ask for the
435
__LA_DECL int archive_entry_xattr_count(struct archive_entry *);
436
__LA_DECL int archive_entry_xattr_reset(struct archive_entry *);
437
__LA_DECL int archive_entry_xattr_next(struct archive_entry *,
438
const char ** /* name */, const void ** /* value */, size_t *);
441
* Utility to match up hardlinks.
443
* The 'struct archive_entry_linkresolver' is a cache of archive entries
444
* for files with multiple links. Here's how to use it:
445
* 1. Create a lookup object with archive_entry_linkresolver_new()
446
* 2. Tell it the archive format you're using.
447
* 3. Hand each archive_entry to archive_entry_linkify().
448
* That function will return 0, 1, or 2 entries that should
450
* 4. Call archive_entry_linkify(resolver, NULL) until
451
* no more entries are returned.
452
* 5. Call archive_entry_link_resolver_free(resolver) to free resources.
454
* The entries returned have their hardlink and size fields updated
455
* appropriately. If an entry is passed in that does not refer to
456
* a file with multiple links, it is returned unchanged. The intention
457
* is that you should be able to simply filter all entries through
460
* To make things more efficient, be sure that each entry has a valid
461
* nlinks value. The hardlink cache uses this to track when all links
462
* have been found. If the nlinks value is zero, it will keep every
463
* name in the cache indefinitely, which can use a lot of memory.
465
* Note that archive_entry_size() is reset to zero if the file
466
* body should not be written to the archive. Pay attention!
468
struct archive_entry_linkresolver;
471
* There are three different strategies for marking hardlinks.
472
* The descriptions below name them after the best-known
473
* formats that rely on each strategy:
475
* "Old cpio" is the simplest, it always returns any entry unmodified.
476
* As far as I know, only cpio formats use this. Old cpio archives
477
* store every link with the full body; the onus is on the dearchiver
478
* to detect and properly link the files as they are restored.
479
* "tar" is also pretty simple; it caches a copy the first time it sees
480
* any link. Subsequent appearances are modified to be hardlink
481
* references to the first one without any body. Used by all tar
482
* formats, although the newest tar formats permit the "old cpio" strategy
483
* as well. This strategy is very simple for the dearchiver,
484
* and reasonably straightforward for the archiver.
485
* "new cpio" is trickier. It stores the body only with the last
486
* occurrence. The complication is that we might not
487
* see every link to a particular file in a single session, so
488
* there's no easy way to know when we've seen the last occurrence.
489
* The solution here is to queue one link until we see the next.
490
* At the end of the session, you can enumerate any remaining
491
* entries by calling archive_entry_linkify(NULL) and store those
492
* bodies. If you have a file with three links l1, l2, and l3,
493
* you'll get the following behavior if you see all three links:
494
* linkify(l1) => NULL (the resolver stores l1 internally)
495
* linkify(l2) => l1 (resolver stores l2, you write l1)
496
* linkify(l3) => l2, l3 (all links seen, you can write both).
497
* If you only see l1 and l2, you'll get this behavior:
498
* linkify(l1) => NULL
500
* linkify(NULL) => l2 (at end, you retrieve remaining links)
501
* As the name suggests, this strategy is used by newer cpio variants.
502
* It's noticably more complex for the archiver, slightly more complex
503
* for the dearchiver than the tar strategy, but makes it straightforward
504
* to restore a file using any link by simply continuing to scan until
505
* you see a link that is stored with a body. In contrast, the tar
506
* strategy requires you to rescan the archive from the beginning to
507
* correctly extract an arbitrary link.
510
__LA_DECL struct archive_entry_linkresolver *archive_entry_linkresolver_new(void);
511
__LA_DECL void archive_entry_linkresolver_set_strategy(
512
struct archive_entry_linkresolver *, int /* format_code */);
513
__LA_DECL void archive_entry_linkresolver_free(struct archive_entry_linkresolver *);
514
__LA_DECL void archive_entry_linkify(struct archive_entry_linkresolver *,
515
struct archive_entry **, struct archive_entry **);
521
/* This is meaningless outside of this header. */
524
#endif /* !ARCHIVE_ENTRY_H_INCLUDED */
added
removed
src/libarchive/libarchive/archive_entry.h
