2 * Copyright (c) 2003-2007 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: src/lib/libarchive/archive.h.in,v 1.46 2007/07/06 15:36:37 kientzle Exp $
28 #ifndef ARCHIVE_H_INCLUDED
29 #define ARCHIVE_H_INCLUDED
32 * This header file corresponds to:
33 * Library version @ARCHIVE_VERSION@
34 * Shared library version @SHLIB_MAJOR@
37 #include <sys/types.h> /* Linux requires this for off_t */
38 @ARCHIVE_H_INCLUDE_INTTYPES_H@
39 #include <stdio.h> /* For FILE * */
41 #include <unistd.h> /* For ssize_t and size_t */
44 typedef unsigned int uid_t;
45 typedef unsigned int gid_t;
46 typedef unsigned short mode_t;
54 * Each of the version identifiers comes as a macro and a function.
55 * The macro identifies the installed header; the function identifies
56 * the library version (which may not be the same if you're using a
57 * dynamically-linked version of the library).
61 * Textual name/version of the library, useful for version displays.
63 #define ARCHIVE_LIBRARY_VERSION "libarchive @ARCHIVE_VERSION@"
64 const char * archive_version(void);
67 * Major version number: If ARCHIVE_API_VERSION !=
68 * archive_api_version(), then the library you were linked with is
69 * using an incompatible API to the one you were compiled with. This
70 * is almost certainly a fatal problem.
72 #define ARCHIVE_API_VERSION @ARCHIVE_API_MAJOR@
73 int archive_api_version(void);
76 * Minor version number: ARCHIVE_API_FEATURE is incremented with each
77 * significant feature addition, so you can test (at compile or run
78 * time) if a particular feature is implemented. It's no big deal if
79 * ARCHIVE_API_FEATURE != archive_api_feature(), as long as both are
80 * high enough to include the features you're relying on. Specific
81 * values of FEATURE are documented here:
83 * 1 - Version tests are available.
84 * 2 - archive_{read,write}_close available separately from _finish.
85 * 3 - open_memory, open_memory2, open_FILE, open_fd available
86 * 5 - archive_write_disk interface available
88 * Unfortunately, this count resets whenever ARCHIVE_API_VERSION changes,
89 * making it awkward to use in practice. For that reason, it is deprecated
90 * in favor of the more-accurate version stamp below. It will eventually
93 #define ARCHIVE_API_FEATURE @ARCHIVE_API_MINOR@
94 int archive_api_feature(void);
97 * The "version stamp" is a single integer that makes it easy to check
98 * the exact version: for version a.b.c, the version stamp is
99 * printf("%d%03d%03d",a,b,c). For example, version 2.12.108 has
100 * version stamp 2012108.
102 * This was introduced with libarchive 1.9.0 in the libarchive 1.x family
103 * and libarchive 2.2.4 in the libarchive 2.x family. The following
104 * may be useful if you really want to do feature detection for earlier
105 * libarchive versions:
107 * #ifndef ARCHIVE_VERSION_STAMP
108 * #define ARCHIVE_VERSION_STAMP \
109 * (ARCHIVE_API_VERSION * 1000000 + ARCHIVE_API_FEATURE * 1000)
112 #define ARCHIVE_VERSION_STAMP @ARCHIVE_VERSION_STAMP@
113 int archive_version_stamp(void);
116 #define ARCHIVE_BYTES_PER_RECORD 512
117 #define ARCHIVE_DEFAULT_BYTES_PER_BLOCK 10240
119 /* Declare our basic types. */
121 struct archive_entry;
124 * Error codes: Use archive_errno() and archive_error_string()
125 * to retrieve details. Unless specified otherwise, all functions
126 * that return 'int' use these codes.
128 #define ARCHIVE_EOF 1 /* Found end of archive. */
129 #define ARCHIVE_OK 0 /* Operation was successful. */
130 #define ARCHIVE_RETRY (-10) /* Retry might succeed. */
131 #define ARCHIVE_WARN (-20) /* Partial success. */
132 /* For example, if write_header "fails", then you can't push data. */
133 #define ARCHIVE_FAILED (-25) /* Current operation cannot complete. */
134 #define ARCHIVE_FATAL (-30) /* No more operations are possible. */
137 * As far as possible, archive_errno returns standard platform errno codes.
138 * Of course, the details vary by platform, so the actual definitions
139 * here are stored in "archive_platform.h". The symbols are listed here
140 * for reference; as a rule, clients should not need to know the exact
141 * platform-dependent error code.
143 /* Unrecognized or invalid file format. */
144 /* #define ARCHIVE_ERRNO_FILE_FORMAT */
145 /* Illegal usage of the library. */
146 /* #define ARCHIVE_ERRNO_PROGRAMMER_ERROR */
147 /* Unknown or unclassified error. */
148 /* #define ARCHIVE_ERRNO_MISC */
151 * Callbacks are invoked to automatically read/skip/write/open/close the
152 * archive. You can provide your own for complex tasks (like breaking
153 * archives across multiple tapes) or use standard ones built into the
157 /* Returns pointer and size of next block of data from archive. */
158 typedef ssize_t archive_read_callback(struct archive *, void *_client_data,
159 const void **_buffer);
160 /* Skips at most request bytes from archive and returns the skipped amount */
161 #if ARCHIVE_API_VERSION < 2
162 typedef ssize_t archive_skip_callback(struct archive *, void *_client_data,
165 typedef off_t archive_skip_callback(struct archive *, void *_client_data,
168 /* Returns size actually written, zero on EOF, -1 on error. */
169 typedef ssize_t archive_write_callback(struct archive *, void *_client_data,
170 const void *_buffer, size_t _length);
171 typedef int archive_open_callback(struct archive *, void *_client_data);
172 typedef int archive_close_callback(struct archive *, void *_client_data);
175 * Codes for archive_compression.
177 #define ARCHIVE_COMPRESSION_NONE 0
178 #define ARCHIVE_COMPRESSION_GZIP 1
179 #define ARCHIVE_COMPRESSION_BZIP2 2
180 #define ARCHIVE_COMPRESSION_COMPRESS 3
181 #define ARCHIVE_COMPRESSION_PROGRAM 4
184 * Codes returned by archive_format.
186 * Top 16 bits identifies the format family (e.g., "tar"); lower
187 * 16 bits indicate the variant. This is updated by read_next_header.
188 * Note that the lower 16 bits will often vary from entry to entry.
189 * In some cases, this variation occurs as libarchive learns more about
190 * the archive (for example, later entries might utilize extensions that
191 * weren't necessary earlier in the archive; in this case, libarchive
192 * will change the format code to indicate the extended format that
193 * was used). In other cases, it's because different tools have
194 * modified the archive and so different parts of the archive
195 * actually have slightly different formts. (Both tar and cpio store
196 * format codes in each entry, so it is quite possible for each
197 * entry to be in a different format.)
199 #define ARCHIVE_FORMAT_BASE_MASK 0xff0000
200 #define ARCHIVE_FORMAT_CPIO 0x10000
201 #define ARCHIVE_FORMAT_CPIO_POSIX (ARCHIVE_FORMAT_CPIO | 1)
202 #define ARCHIVE_FORMAT_CPIO_BIN_LE (ARCHIVE_FORMAT_CPIO | 2)
203 #define ARCHIVE_FORMAT_CPIO_BIN_BE (ARCHIVE_FORMAT_CPIO | 3)
204 #define ARCHIVE_FORMAT_CPIO_SVR4_NOCRC (ARCHIVE_FORMAT_CPIO | 4)
205 #define ARCHIVE_FORMAT_CPIO_SVR4_CRC (ARCHIVE_FORMAT_CPIO | 5)
206 #define ARCHIVE_FORMAT_SHAR 0x20000
207 #define ARCHIVE_FORMAT_SHAR_BASE (ARCHIVE_FORMAT_SHAR | 1)
208 #define ARCHIVE_FORMAT_SHAR_DUMP (ARCHIVE_FORMAT_SHAR | 2)
209 #define ARCHIVE_FORMAT_TAR 0x30000
210 #define ARCHIVE_FORMAT_TAR_USTAR (ARCHIVE_FORMAT_TAR | 1)
211 #define ARCHIVE_FORMAT_TAR_PAX_INTERCHANGE (ARCHIVE_FORMAT_TAR | 2)
212 #define ARCHIVE_FORMAT_TAR_PAX_RESTRICTED (ARCHIVE_FORMAT_TAR | 3)
213 #define ARCHIVE_FORMAT_TAR_GNUTAR (ARCHIVE_FORMAT_TAR | 4)
214 #define ARCHIVE_FORMAT_ISO9660 0x40000
215 #define ARCHIVE_FORMAT_ISO9660_ROCKRIDGE (ARCHIVE_FORMAT_ISO9660 | 1)
216 #define ARCHIVE_FORMAT_ZIP 0x50000
217 #define ARCHIVE_FORMAT_EMPTY 0x60000
218 #define ARCHIVE_FORMAT_AR 0x70000
219 #define ARCHIVE_FORMAT_AR_GNU (ARCHIVE_FORMAT_AR | 1)
220 #define ARCHIVE_FORMAT_AR_BSD (ARCHIVE_FORMAT_AR | 2)
221 #define ARCHIVE_FORMAT_MTREE 0x80000
222 #define ARCHIVE_FORMAT_MTREE_V1 (ARCHIVE_FORMAT_MTREE | 1)
223 #define ARCHIVE_FORMAT_MTREE_V2 (ARCHIVE_FORMAT_MTREE | 2)
226 * Basic outline for reading an archive:
227 * 1) Ask archive_read_new for an archive reader object.
228 * 2) Update any global properties as appropriate.
229 * In particular, you'll certainly want to call appropriate
230 * archive_read_support_XXX functions.
231 * 3) Call archive_read_open_XXX to open the archive
232 * 4) Repeatedly call archive_read_next_header to get information about
233 * successive archive entries. Call archive_read_data to extract
234 * data for entries of interest.
235 * 5) Call archive_read_finish to end processing.
237 struct archive *archive_read_new(void);
240 * The archive_read_support_XXX calls enable auto-detect for this
241 * archive handle. They also link in the necessary support code.
242 * For example, if you don't want bzlib linked in, don't invoke
243 * support_compression_bzip2(). The "all" functions provide the
246 int archive_read_support_compression_all(struct archive *);
247 int archive_read_support_compression_bzip2(struct archive *);
248 int archive_read_support_compression_compress(struct archive *);
249 int archive_read_support_compression_gzip(struct archive *);
250 int archive_read_support_compression_none(struct archive *);
251 int archive_read_support_compression_program(struct archive *,
252 const char *command);
254 int archive_read_support_format_all(struct archive *);
255 int archive_read_support_format_ar(struct archive *);
256 int archive_read_support_format_cpio(struct archive *);
257 int archive_read_support_format_empty(struct archive *);
258 int archive_read_support_format_gnutar(struct archive *);
259 int archive_read_support_format_iso9660(struct archive *);
260 int archive_read_support_format_mtree(struct archive *);
261 int archive_read_support_format_tar(struct archive *);
262 int archive_read_support_format_zip(struct archive *);
265 /* Open the archive using callbacks for archive I/O. */
266 int archive_read_open(struct archive *, void *_client_data,
267 archive_open_callback *, archive_read_callback *,
268 archive_close_callback *);
269 int archive_read_open2(struct archive *, void *_client_data,
270 archive_open_callback *, archive_read_callback *,
271 archive_skip_callback *, archive_close_callback *);
274 * A variety of shortcuts that invoke archive_read_open() with
275 * canned callbacks suitable for common situations. The ones that
276 * accept a block size handle tape blocking correctly.
278 /* Use this if you know the filename. Note: NULL indicates stdin. */
279 int archive_read_open_filename(struct archive *,
280 const char *_filename, size_t _block_size);
281 /* archive_read_open_file() is a deprecated synonym for ..._open_filename(). */
282 int archive_read_open_file(struct archive *,
283 const char *_filename, size_t _block_size);
284 /* Read an archive that's stored in memory. */
285 int archive_read_open_memory(struct archive *,
286 void * buff, size_t size);
287 /* A more involved version that is only used for internal testing. */
288 int archive_read_open_memory2(struct archive *a, void *buff,
289 size_t size, size_t read_size);
290 /* Read an archive that's already open, using the file descriptor. */
291 int archive_read_open_fd(struct archive *, int _fd,
293 /* Read an archive that's already open, using a FILE *. */
294 /* Note: DO NOT use this with tape drives. */
295 int archive_read_open_FILE(struct archive *, FILE *_file);
297 /* Parses and returns next entry header. */
298 int archive_read_next_header(struct archive *,
299 struct archive_entry **);
302 * Retrieve the byte offset in UNCOMPRESSED data where last-read
305 int64_t archive_read_header_position(struct archive *);
307 /* Read data from the body of an entry. Similar to read(2). */
308 ssize_t archive_read_data(struct archive *, void *, size_t);
310 * A zero-copy version of archive_read_data that also exposes the file offset
311 * of each returned block. Note that the client has no way to specify
312 * the desired size of the block. The API does guarantee that offsets will
313 * be strictly increasing and that returned blocks will not overlap.
315 int archive_read_data_block(struct archive *a,
316 const void **buff, size_t *size, off_t *offset);
319 * Some convenience functions that are built on archive_read_data:
320 * 'skip': skips entire entry
321 * 'into_buffer': writes data into memory buffer that you provide
322 * 'into_fd': writes data to specified filedes
324 int archive_read_data_skip(struct archive *);
325 int archive_read_data_into_buffer(struct archive *, void *buffer,
327 int archive_read_data_into_fd(struct archive *, int fd);
330 * Convenience function to recreate the current entry (whose header
331 * has just been read) on disk.
333 * This does quite a bit more than just copy data to disk. It also:
334 * - Creates intermediate directories as required.
335 * - Manages directory permissions: non-writable directories will
336 * be initially created with write permission enabled; when the
337 * archive is closed, dir permissions are edited to the values specified
339 * - Checks hardlinks: hardlinks will not be extracted unless the
340 * linked-to file was also extracted within the same session. (TODO)
343 /* The "flags" argument selects optional behavior, 'OR' the flags you want. */
345 /* Default: Do not try to set owner/group. */
346 #define ARCHIVE_EXTRACT_OWNER (1)
347 /* Default: Do obey umask, do not restore SUID/SGID/SVTX bits. */
348 #define ARCHIVE_EXTRACT_PERM (2)
349 /* Default: Do not restore mtime/atime. */
350 #define ARCHIVE_EXTRACT_TIME (4)
351 /* Default: Replace existing files. */
352 #define ARCHIVE_EXTRACT_NO_OVERWRITE (8)
353 /* Default: Try create first, unlink only if create fails with EEXIST. */
354 #define ARCHIVE_EXTRACT_UNLINK (16)
355 /* Default: Do not restore ACLs. */
356 #define ARCHIVE_EXTRACT_ACL (32)
357 /* Default: Do not restore fflags. */
358 #define ARCHIVE_EXTRACT_FFLAGS (64)
359 /* Default: Do not restore xattrs. */
360 #define ARCHIVE_EXTRACT_XATTR (128)
361 /* Default: Do not try to guard against extracts redirected by symlinks. */
362 /* Note: With ARCHIVE_EXTRACT_UNLINK, will remove any intermediate symlink. */
363 #define ARCHIVE_EXTRACT_SECURE_SYMLINKS (256)
364 /* Default: Do not reject entries with '..' as path elements. */
365 #define ARCHIVE_EXTRACT_SECURE_NODOTDOT (512)
366 /* Default: Create parent directories as needed. */
367 #define ARCHIVE_EXTRACT_NO_AUTODIR (1024)
368 /* Default: Overwrite files, even if one on disk is newer. */
369 #define ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER (2048)
371 int archive_read_extract(struct archive *, struct archive_entry *,
373 void archive_read_extract_set_progress_callback(struct archive *,
374 void (*_progress_func)(void *), void *_user_data);
376 /* Record the dev/ino of a file that will not be written. This is
377 * generally set to the dev/ino of the archive being read. */
378 void archive_read_extract_set_skip_file(struct archive *,
381 /* Close the file and release most resources. */
382 int archive_read_close(struct archive *);
383 /* Release all resources and destroy the object. */
384 /* Note that archive_read_finish will call archive_read_close for you. */
385 #if ARCHIVE_API_VERSION > 1
386 int archive_read_finish(struct archive *);
388 /* Temporarily allow library to compile with either 1.x or 2.0 API. */
389 /* Erroneously declared to return void in libarchive 1.x */
390 void archive_read_finish(struct archive *);
394 * To create an archive:
395 * 1) Ask archive_write_new for a archive writer object.
396 * 2) Set any global properties. In particular, you should set
397 * the compression and format to use.
398 * 3) Call archive_write_open to open the file (most people
399 * will use archive_write_open_file or archive_write_open_fd,
400 * which provide convenient canned I/O callbacks for you).
402 * - construct an appropriate struct archive_entry structure
403 * - archive_write_header to write the header
404 * - archive_write_data to write the entry data
405 * 5) archive_write_close to close the output
406 * 6) archive_write_finish to cleanup the writer and release resources
408 struct archive *archive_write_new(void);
409 int archive_write_set_bytes_per_block(struct archive *,
410 int bytes_per_block);
411 int archive_write_get_bytes_per_block(struct archive *);
412 /* XXX This is badly misnamed; suggestions appreciated. XXX */
413 int archive_write_set_bytes_in_last_block(struct archive *,
414 int bytes_in_last_block);
415 int archive_write_get_bytes_in_last_block(struct archive *);
417 /* The dev/ino of a file that won't be archived. This is used
418 * to avoid recursively adding an archive to itself. */
419 int archive_write_set_skip_file(struct archive *, dev_t, ino_t);
421 int archive_write_set_compression_bzip2(struct archive *);
422 int archive_write_set_compression_gzip(struct archive *);
423 int archive_write_set_compression_none(struct archive *);
424 int archive_write_set_compression_program(struct archive *,
426 /* A convenience function to set the format based on the code or name. */
427 int archive_write_set_format(struct archive *, int format_code);
428 int archive_write_set_format_by_name(struct archive *,
430 /* To minimize link pollution, use one or more of the following. */
431 int archive_write_set_format_ar_bsd(struct archive *);
432 int archive_write_set_format_ar_svr4(struct archive *);
433 int archive_write_set_format_cpio(struct archive *);
434 int archive_write_set_format_cpio_newc(struct archive *);
435 /* TODO: int archive_write_set_format_old_tar(struct archive *); */
436 int archive_write_set_format_pax(struct archive *);
437 int archive_write_set_format_pax_restricted(struct archive *);
438 int archive_write_set_format_shar(struct archive *);
439 int archive_write_set_format_shar_dump(struct archive *);
440 int archive_write_set_format_ustar(struct archive *);
441 int archive_write_open(struct archive *, void *,
442 archive_open_callback *, archive_write_callback *,
443 archive_close_callback *);
444 int archive_write_open_fd(struct archive *, int _fd);
445 int archive_write_open_filename(struct archive *, const char *_file);
446 /* A deprecated synonym for archive_write_open_filename() */
447 int archive_write_open_file(struct archive *, const char *_file);
448 int archive_write_open_FILE(struct archive *, FILE *);
449 /* _buffSize is the size of the buffer, _used refers to a variable that
450 * will be updated after each write into the buffer. */
451 int archive_write_open_memory(struct archive *,
452 void *_buffer, size_t _buffSize, size_t *_used);
455 * Note that the library will truncate writes beyond the size provided
456 * to archive_write_header or pad if the provided data is short.
458 int archive_write_header(struct archive *,
459 struct archive_entry *);
460 #if ARCHIVE_API_VERSION > 1
461 ssize_t archive_write_data(struct archive *, const void *, size_t);
463 /* Temporarily allow library to compile with either 1.x or 2.0 API. */
464 /* This was erroneously declared to return "int" in libarchive 1.x. */
465 int archive_write_data(struct archive *, const void *, size_t);
467 ssize_t archive_write_data_block(struct archive *, const void *, size_t, off_t);
468 int archive_write_finish_entry(struct archive *);
469 int archive_write_close(struct archive *);
470 #if ARCHIVE_API_VERSION > 1
471 int archive_write_finish(struct archive *);
473 /* Temporarily allow library to compile with either 1.x or 2.0 API. */
474 /* Return value was incorrect in libarchive 1.x. */
475 void archive_write_finish(struct archive *);
479 * To create objects on disk:
480 * 1) Ask archive_write_disk_new for a new archive_write_disk object.
481 * 2) Set any global properties. In particular, you should set
482 * the compression and format to use.
484 * - construct an appropriate struct archive_entry structure
485 * - archive_write_header to create the file/dir/etc on disk
486 * - archive_write_data to write the entry data
487 * 4) archive_write_finish to cleanup the writer and release resources
489 * In particular, you can use this in conjunction with archive_read()
490 * to pull entries out of an archive and create them on disk.
492 struct archive *archive_write_disk_new(void);
493 /* This file will not be overwritten. */
494 int archive_write_disk_set_skip_file(struct archive *,
496 /* Set flags to control how the next item gets created. */
497 int archive_write_disk_set_options(struct archive *,
500 * The lookup functions are given uname/uid (or gname/gid) pairs and
501 * return a uid (gid) suitable for this system. These are used for
502 * restoring ownership and for setting ACLs. The default functions
503 * are naive, they just return the uid/gid. These are small, so reasonable
504 * for applications that don't need to preserve ownership; they
505 * are probably also appropriate for applications that are doing
506 * same-system backup and restore.
509 * The "standard" lookup functions use common system calls to lookup
510 * the uname/gname, falling back to the uid/gid if the names can't be
511 * found. They cache lookups and are reasonably fast, but can be very
512 * large, so they are not used unless you ask for them. In
513 * particular, these match the specifications of POSIX "pax" and old
516 int archive_write_disk_set_standard_lookup(struct archive *);
518 * If neither the default (naive) nor the standard (big) functions suit
519 * your needs, you can write your own and register them. Be sure to
520 * include a cleanup function if you have allocated private data.
522 int archive_write_disk_set_group_lookup(struct archive *,
524 gid_t (*loookup)(void *, const char *gname, gid_t gid),
525 void (*cleanup)(void *));
526 int archive_write_disk_set_user_lookup(struct archive *,
528 uid_t (*)(void *, const char *uname, uid_t uid),
529 void (*cleanup)(void *));
532 * Accessor functions to read/set various information in
533 * the struct archive object:
535 /* Bytes written after compression or read before decompression. */
536 int64_t archive_position_compressed(struct archive *);
537 /* Bytes written to compressor or read from decompressor. */
538 int64_t archive_position_uncompressed(struct archive *);
540 const char *archive_compression_name(struct archive *);
541 int archive_compression(struct archive *);
542 int archive_errno(struct archive *);
543 const char *archive_error_string(struct archive *);
544 const char *archive_format_name(struct archive *);
545 int archive_format(struct archive *);
546 void archive_clear_error(struct archive *);
547 void archive_set_error(struct archive *, int _err, const char *fmt, ...);
548 void archive_copy_error(struct archive *dest, struct archive *src);
554 #endif /* !ARCHIVE_H_INCLUDED */