contrib/libarchive-2/libarchive/archive.h.in

   1 /*-
   2  * Copyright (c) 2003-2007 Tim Kientzle
   3  * All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   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.
  13  *
  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.
  24  *
  25  * $FreeBSD: src/lib/libarchive/archive.h.in,v 1.43 2007/05/02 05:29:55 cperciva Exp $
  26  */
  27
  28 #ifndef ARCHIVE_H_INCLUDED
  29 #define ARCHIVE_H_INCLUDED
  30
  31 /*
  32  * This header file corresponds to:
  33  *   Library version @ARCHIVE_VERSION@
  34  *   Shared library version @SHLIB_MAJOR@
  35  */
  36
  37 #include <sys/types.h>  /* Linux requires this for off_t */
  38 @ARCHIVE_H_INCLUDE_INTTYPES_H@
  39 #include <stdio.h> /* For FILE * */
  40 #ifndef _WIN32
  41 #include <unistd.h>  /* For ssize_t and size_t */
  42 #else
  43 typedef long ssize_t;
  44 typedef unsigned int uid_t;
  45 typedef unsigned int gid_t;
  46 typedef unsigned short mode_t;
  47 #endif
  48
  49 #ifdef __cplusplus
  50 extern "C" {
  51 #endif
  52
  53
  54 /*
  55  * If ARCHIVE_API_VERSION != archive_api_version(), then the library you
  56  * were linked with is using an incompatible API to the one you were
  57  * compiled with.  This is almost certainly a fatal problem.
  58  *
  59  * ARCHIVE_API_FEATURE is incremented with each significant feature
  60  * addition, so you can test (at compile or run time) if a particular
  61  * feature is implemented.  It's no big deal if ARCHIVE_API_FEATURE !=
  62  * archive_api_feature(), as long as both are high enough to include
  63  * the features you're relying on.  Specific values of FEATURE are
  64  * documented here:
  65  *
  66  *    1 - Version tests are available.
  67  *    2 - archive_{read,write}_close available separately from _finish.
  68  *    3 - open_memory, open_memory2, open_FILE, open_fd available
  69  *    5 - archive_write_disk interface available
  70  */
  71 #define ARCHIVE_API_VERSION     @ARCHIVE_API_MAJOR@
  72 int             archive_api_version(void);
  73 #define ARCHIVE_API_FEATURE     @ARCHIVE_API_MINOR@
  74 int             archive_api_feature(void);
  75 /* Textual name/version of the library. */
  76 #define ARCHIVE_LIBRARY_VERSION "libarchive @ARCHIVE_VERSION@"
  77 const char *    archive_version(void);
  78
  79 #define ARCHIVE_BYTES_PER_RECORD          512
  80 #define ARCHIVE_DEFAULT_BYTES_PER_BLOCK 10240
  81
  82 /* Declare our basic types. */
  83 struct archive;
  84 struct archive_entry;
  85
  86 /*
  87  * Error codes: Use archive_errno() and archive_error_string()
  88  * to retrieve details.  Unless specified otherwise, all functions
  89  * that return 'int' use these codes.
  90  */
  91 #define ARCHIVE_EOF       1     /* Found end of archive. */
  92 #define ARCHIVE_OK        0     /* Operation was successful. */
  93 #define ARCHIVE_RETRY   (-10)   /* Retry might succeed. */
  94 #define ARCHIVE_WARN    (-20)   /* Partial success. */
  95 /* For example, if write_header "fails", then you can't push data. */
  96 #define ARCHIVE_FAILED  (-25)   /* Current operation cannot complete. */
  97 #define ARCHIVE_FATAL   (-30)   /* No more operations are possible. */
  98
  99 /*
 100  * As far as possible, archive_errno returns standard platform errno codes.
 101  * Of course, the details vary by platform, so the actual definitions
 102  * here are stored in "archive_platform.h".  The symbols are listed here
 103  * for reference; as a rule, clients should not need to know the exact
 104  * platform-dependent error code.
 105  */
 106 /* Unrecognized or invalid file format. */
 107 /* #define      ARCHIVE_ERRNO_FILE_FORMAT */
 108 /* Illegal usage of the library. */
 109 /* #define      ARCHIVE_ERRNO_PROGRAMMER_ERROR */
 110 /* Unknown or unclassified error. */
 111 /* #define      ARCHIVE_ERRNO_MISC */
 112
 113 /*
 114  * Callbacks are invoked to automatically read/skip/write/open/close the
 115  * archive. You can provide your own for complex tasks (like breaking
 116  * archives across multiple tapes) or use standard ones built into the
 117  * library.
 118  */
 119
 120 /* Returns pointer and size of next block of data from archive. */
 121 typedef ssize_t archive_read_callback(struct archive *, void *_client_data,
 122                     const void **_buffer);
 123 /* Skips at most request bytes from archive and returns the skipped amount */
 124 #if ARCHIVE_API_VERSION < 2
 125 typedef ssize_t archive_skip_callback(struct archive *, void *_client_data,
 126                     size_t request);
 127 #else
 128 typedef off_t   archive_skip_callback(struct archive *, void *_client_data,
 129                     off_t request);
 130 #endif
 131 /* Returns size actually written, zero on EOF, -1 on error. */
 132 typedef ssize_t archive_write_callback(struct archive *, void *_client_data,
 133                     const void *_buffer, size_t _length);
 134 typedef int     archive_open_callback(struct archive *, void *_client_data);
 135 typedef int     archive_close_callback(struct archive *, void *_client_data);
 136
 137 /*
 138  * Codes for archive_compression.
 139  */
 140 #define ARCHIVE_COMPRESSION_NONE        0
 141 #define ARCHIVE_COMPRESSION_GZIP        1
 142 #define ARCHIVE_COMPRESSION_BZIP2       2
 143 #define ARCHIVE_COMPRESSION_COMPRESS    3
 144 #define ARCHIVE_COMPRESSION_PROGRAM     4
 145
 146 /*
 147  * Codes returned by archive_format.
 148  *
 149  * Top 16 bits identifies the format family (e.g., "tar"); lower
 150  * 16 bits indicate the variant.  This is updated by read_next_header.
 151  * Note that the lower 16 bits will often vary from entry to entry.
 152  * In some cases, this variation occurs as libarchive learns more about
 153  * the archive (for example, later entries might utilize extensions that
 154  * weren't necessary earlier in the archive; in this case, libarchive
 155  * will change the format code to indicate the extended format that
 156  * was used).  In other cases, it's because different tools have
 157  * modified the archive and so different parts of the archive
 158  * actually have slightly different formts.  (Both tar and cpio store
 159  * format codes in each entry, so it is quite possible for each
 160  * entry to be in a different format.)
 161  */
 162 #define ARCHIVE_FORMAT_BASE_MASK                0xff0000
 163 #define ARCHIVE_FORMAT_CPIO                     0x10000
 164 #define ARCHIVE_FORMAT_CPIO_POSIX               (ARCHIVE_FORMAT_CPIO | 1)
 165 #define ARCHIVE_FORMAT_CPIO_BIN_LE              (ARCHIVE_FORMAT_CPIO | 2)
 166 #define ARCHIVE_FORMAT_CPIO_BIN_BE              (ARCHIVE_FORMAT_CPIO | 3)
 167 #define ARCHIVE_FORMAT_CPIO_SVR4_NOCRC          (ARCHIVE_FORMAT_CPIO | 4)
 168 #define ARCHIVE_FORMAT_CPIO_SVR4_CRC            (ARCHIVE_FORMAT_CPIO | 5)
 169 #define ARCHIVE_FORMAT_SHAR                     0x20000
 170 #define ARCHIVE_FORMAT_SHAR_BASE                (ARCHIVE_FORMAT_SHAR | 1)
 171 #define ARCHIVE_FORMAT_SHAR_DUMP                (ARCHIVE_FORMAT_SHAR | 2)
 172 #define ARCHIVE_FORMAT_TAR                      0x30000
 173 #define ARCHIVE_FORMAT_TAR_USTAR                (ARCHIVE_FORMAT_TAR | 1)
 174 #define ARCHIVE_FORMAT_TAR_PAX_INTERCHANGE      (ARCHIVE_FORMAT_TAR | 2)
 175 #define ARCHIVE_FORMAT_TAR_PAX_RESTRICTED       (ARCHIVE_FORMAT_TAR | 3)
 176 #define ARCHIVE_FORMAT_TAR_GNUTAR               (ARCHIVE_FORMAT_TAR | 4)
 177 #define ARCHIVE_FORMAT_ISO9660                  0x40000
 178 #define ARCHIVE_FORMAT_ISO9660_ROCKRIDGE        (ARCHIVE_FORMAT_ISO9660 | 1)
 179 #define ARCHIVE_FORMAT_ZIP                      0x50000
 180 #define ARCHIVE_FORMAT_EMPTY                    0x60000
 181 #define ARCHIVE_FORMAT_AR                       0x70000
 182 #define ARCHIVE_FORMAT_AR_GNU                   (ARCHIVE_FORMAT_AR | 1)
 183 #define ARCHIVE_FORMAT_AR_BSD                   (ARCHIVE_FORMAT_AR | 2)
 184
 185 /*-
 186  * Basic outline for reading an archive:
 187  *   1) Ask archive_read_new for an archive reader object.
 188  *   2) Update any global properties as appropriate.
 189  *      In particular, you'll certainly want to call appropriate
 190  *      archive_read_support_XXX functions.
 191  *   3) Call archive_read_open_XXX to open the archive
 192  *   4) Repeatedly call archive_read_next_header to get information about
 193  *      successive archive entries.  Call archive_read_data to extract
 194  *      data for entries of interest.
 195  *   5) Call archive_read_finish to end processing.
 196  */
 197 struct archive  *archive_read_new(void);
 198
 199 /*
 200  * The archive_read_support_XXX calls enable auto-detect for this
 201  * archive handle.  They also link in the necessary support code.
 202  * For example, if you don't want bzlib linked in, don't invoke
 203  * support_compression_bzip2().  The "all" functions provide the
 204  * obvious shorthand.
 205  */
 206 int              archive_read_support_compression_all(struct archive *);
 207 int              archive_read_support_compression_bzip2(struct archive *);
 208 int              archive_read_support_compression_compress(struct archive *);
 209 int              archive_read_support_compression_gzip(struct archive *);
 210 int              archive_read_support_compression_none(struct archive *);
 211 int              archive_read_support_compression_program(struct archive *,
 212                      const char *command);
 213
 214 int              archive_read_support_format_all(struct archive *);
 215 int              archive_read_support_format_ar(struct archive *);
 216 int              archive_read_support_format_cpio(struct archive *);
 217 int              archive_read_support_format_empty(struct archive *);
 218 int              archive_read_support_format_gnutar(struct archive *);
 219 int              archive_read_support_format_iso9660(struct archive *);
 220 int              archive_read_support_format_tar(struct archive *);
 221 int              archive_read_support_format_zip(struct archive *);
 222
 223
 224 /* Open the archive using callbacks for archive I/O. */
 225 int              archive_read_open(struct archive *, void *_client_data,
 226                      archive_open_callback *, archive_read_callback *,
 227                      archive_close_callback *);
 228 int              archive_read_open2(struct archive *, void *_client_data,
 229                      archive_open_callback *, archive_read_callback *,
 230                      archive_skip_callback *, archive_close_callback *);
 231
 232 /*
 233  * A variety of shortcuts that invoke archive_read_open() with
 234  * canned callbacks suitable for common situations.  The ones that
 235  * accept a block size handle tape blocking correctly.
 236  */
 237 /* Use this if you know the filename.  Note: NULL indicates stdin. */
 238 int              archive_read_open_filename(struct archive *,
 239                      const char *_filename, size_t _block_size);
 240 /* archive_read_open_file() is a deprecated synonym for ..._open_filename(). */
 241 int              archive_read_open_file(struct archive *,
 242                      const char *_filename, size_t _block_size);
 243 /* Read an archive that's stored in memory. */
 244 int              archive_read_open_memory(struct archive *,
 245                      void * buff, size_t size);
 246 /* A more involved version that is only used for internal testing. */
 247 int             archive_read_open_memory2(struct archive *a, void *buff,
 248                      size_t size, size_t read_size);
 249 /* Read an archive that's already open, using the file descriptor. */
 250 int              archive_read_open_fd(struct archive *, int _fd,
 251                      size_t _block_size);
 252 /* Read an archive that's already open, using a FILE *. */
 253 /* Note: DO NOT use this with tape drives. */
 254 int              archive_read_open_FILE(struct archive *, FILE *_file);
 255
 256 /* Parses and returns next entry header. */
 257 int              archive_read_next_header(struct archive *,
 258                      struct archive_entry **);
 259
 260 /*
 261  * Retrieve the byte offset in UNCOMPRESSED data where last-read
 262  * header started.
 263  */
 264 int64_t          archive_read_header_position(struct archive *);
 265
 266 /* Read data from the body of an entry.  Similar to read(2). */
 267 ssize_t          archive_read_data(struct archive *, void *, size_t);
 268 /*
 269  * A zero-copy version of archive_read_data that also exposes the file offset
 270  * of each returned block.  Note that the client has no way to specify
 271  * the desired size of the block.  The API does guarantee that offsets will
 272  * be strictly increasing and that returned blocks will not overlap.
 273  */
 274 int              archive_read_data_block(struct archive *a,
 275                     const void **buff, size_t *size, off_t *offset);
 276
 277 /*-
 278  * Some convenience functions that are built on archive_read_data:
 279  *  'skip': skips entire entry
 280  *  'into_buffer': writes data into memory buffer that you provide
 281  *  'into_fd': writes data to specified filedes
 282  */
 283 int              archive_read_data_skip(struct archive *);
 284 int              archive_read_data_into_buffer(struct archive *, void *buffer,
 285                      ssize_t len);
 286 int              archive_read_data_into_fd(struct archive *, int fd);
 287
 288 /*-
 289  * Convenience function to recreate the current entry (whose header
 290  * has just been read) on disk.
 291  *
 292  * This does quite a bit more than just copy data to disk. It also:
 293  *  - Creates intermediate directories as required.
 294  *  - Manages directory permissions:  non-writable directories will
 295  *    be initially created with write permission enabled; when the
 296  *    archive is closed, dir permissions are edited to the values specified
 297  *    in the archive.
 298  *  - Checks hardlinks:  hardlinks will not be extracted unless the
 299  *    linked-to file was also extracted within the same session. (TODO)
 300  */
 301
 302 /* The "flags" argument selects optional behavior, 'OR' the flags you want. */
 303
 304 /* Default: Do not try to set owner/group. */
 305 #define ARCHIVE_EXTRACT_OWNER   (1)
 306 /* Default: Do obey umask, do not restore SUID/SGID/SVTX bits. */
 307 #define ARCHIVE_EXTRACT_PERM    (2)
 308 /* Default: Do not restore mtime/atime. */
 309 #define ARCHIVE_EXTRACT_TIME    (4)
 310 /* Default: Replace existing files. */
 311 #define ARCHIVE_EXTRACT_NO_OVERWRITE (8)
 312 /* Default: Try create first, unlink only if create fails with EEXIST. */
 313 #define ARCHIVE_EXTRACT_UNLINK  (16)
 314 /* Default: Do not restore ACLs. */
 315 #define ARCHIVE_EXTRACT_ACL     (32)
 316 /* Default: Do not restore fflags. */
 317 #define ARCHIVE_EXTRACT_FFLAGS  (64)
 318 /* Default: Do not restore xattrs. */
 319 #define ARCHIVE_EXTRACT_XATTR   (128)
 320 /* Default: Do not try to guard against extracts redirected by symlinks. */
 321 /* Note: With ARCHIVE_EXTRACT_UNLINK, will remove any intermediate symlink. */
 322 #define ARCHIVE_EXTRACT_SECURE_SYMLINKS (256)
 323 /* Default: Do not reject entries with '..' as path elements. */
 324 #define ARCHIVE_EXTRACT_SECURE_NODOTDOT (512)
 325 /* Default: Create parent directories as needed. */
 326 #define ARCHIVE_EXTRACT_NO_AUTODIR (1024)
 327 /* Default: Overwrite files, even if one on disk is newer. */
 328 #define ARCHIVE_EXTRACT_NO_OVERWRITE_NEWER (2048)
 329
 330 int              archive_read_extract(struct archive *, struct archive_entry *,
 331                      int flags);
 332 void             archive_read_extract_set_progress_callback(struct archive *,
 333                      void (*_progress_func)(void *), void *_user_data);
 334
 335 /* Record the dev/ino of a file that will not be written.  This is
 336  * generally set to the dev/ino of the archive being read. */
 337 void            archive_read_extract_set_skip_file(struct archive *,
 338                      dev_t, ino_t);
 339
 340 /* Close the file and release most resources. */
 341 int              archive_read_close(struct archive *);
 342 /* Release all resources and destroy the object. */
 343 /* Note that archive_read_finish will call archive_read_close for you. */
 344 #if ARCHIVE_API_VERSION > 1
 345 int              archive_read_finish(struct archive *);
 346 #else
 347 /* Temporarily allow library to compile with either 1.x or 2.0 API. */
 348 /* Erroneously declared to return void in libarchive 1.x */
 349 void             archive_read_finish(struct archive *);
 350 #endif
 351
 352 /*-
 353  * To create an archive:
 354  *   1) Ask archive_write_new for a archive writer object.
 355  *   2) Set any global properties.  In particular, you should set
 356  *      the compression and format to use.
 357  *   3) Call archive_write_open to open the file (most people
 358  *       will use archive_write_open_file or archive_write_open_fd,
 359  *       which provide convenient canned I/O callbacks for you).
 360  *   4) For each entry:
 361  *      - construct an appropriate struct archive_entry structure
 362  *      - archive_write_header to write the header
 363  *      - archive_write_data to write the entry data
 364  *   5) archive_write_close to close the output
 365  *   6) archive_write_finish to cleanup the writer and release resources
 366  */
 367 struct archive  *archive_write_new(void);
 368 int              archive_write_set_bytes_per_block(struct archive *,
 369                      int bytes_per_block);
 370 int              archive_write_get_bytes_per_block(struct archive *);
 371 /* XXX This is badly misnamed; suggestions appreciated. XXX */
 372 int              archive_write_set_bytes_in_last_block(struct archive *,
 373                      int bytes_in_last_block);
 374 int              archive_write_get_bytes_in_last_block(struct archive *);
 375
 376 /* The dev/ino of a file that won't be archived.  This is used
 377  * to avoid recursively adding an archive to itself. */
 378 int              archive_write_set_skip_file(struct archive *, dev_t, ino_t);
 379
 380 int              archive_write_set_compression_bzip2(struct archive *);
 381 int              archive_write_set_compression_gzip(struct archive *);
 382 int              archive_write_set_compression_none(struct archive *);
 383 int              archive_write_set_compression_program(struct archive *,
 384                      const char *cmd);
 385 /* A convenience function to set the format based on the code or name. */
 386 int              archive_write_set_format(struct archive *, int format_code);
 387 int              archive_write_set_format_by_name(struct archive *,
 388                      const char *name);
 389 /* To minimize link pollution, use one or more of the following. */
 390 int              archive_write_set_format_ar_bsd(struct archive *);
 391 int              archive_write_set_format_ar_svr4(struct archive *);
 392 int              archive_write_set_format_cpio(struct archive *);
 393 /* TODO: int archive_write_set_format_old_tar(struct archive *); */
 394 int              archive_write_set_format_pax(struct archive *);
 395 int              archive_write_set_format_pax_restricted(struct archive *);
 396 int              archive_write_set_format_shar(struct archive *);
 397 int              archive_write_set_format_shar_dump(struct archive *);
 398 int              archive_write_set_format_ustar(struct archive *);
 399 int              archive_write_open(struct archive *, void *,
 400                      archive_open_callback *, archive_write_callback *,
 401                      archive_close_callback *);
 402 int              archive_write_open_fd(struct archive *, int _fd);
 403 int              archive_write_open_filename(struct archive *, const char *_file);
 404 /* A deprecated synonym for archive_write_open_filename() */
 405 int              archive_write_open_file(struct archive *, const char *_file);
 406 int              archive_write_open_FILE(struct archive *, FILE *);
 407 /* _buffSize is the size of the buffer, _used refers to a variable that
 408  * will be updated after each write into the buffer. */
 409 int              archive_write_open_memory(struct archive *,
 410                         void *_buffer, size_t _buffSize, size_t *_used);
 411
 412 /*
 413  * Note that the library will truncate writes beyond the size provided
 414  * to archive_write_header or pad if the provided data is short.
 415  */
 416 int              archive_write_header(struct archive *,
 417                      struct archive_entry *);
 418 #if ARCHIVE_API_VERSION > 1
 419 ssize_t          archive_write_data(struct archive *, const void *, size_t);
 420 #else
 421 /* Temporarily allow library to compile with either 1.x or 2.0 API. */
 422 /* This was erroneously declared to return "int" in libarchive 1.x. */
 423 int              archive_write_data(struct archive *, const void *, size_t);
 424 #endif
 425 ssize_t          archive_write_data_block(struct archive *, const void *, size_t, off_t);
 426 int              archive_write_finish_entry(struct archive *);
 427 int              archive_write_close(struct archive *);
 428 #if ARCHIVE_API_VERSION > 1
 429 int              archive_write_finish(struct archive *);
 430 #else
 431 /* Temporarily allow library to compile with either 1.x or 2.0 API. */
 432 /* Return value was incorrect in libarchive 1.x. */
 433 void             archive_write_finish(struct archive *);
 434 #endif
 435
 436 /*-
 437  * To create objects on disk:
 438  *   1) Ask archive_write_disk_new for a new archive_write_disk object.
 439  *   2) Set any global properties.  In particular, you should set
 440  *      the compression and format to use.
 441  *   3) For each entry:
 442  *      - construct an appropriate struct archive_entry structure
 443  *      - archive_write_header to create the file/dir/etc on disk
 444  *      - archive_write_data to write the entry data
 445  *   4) archive_write_finish to cleanup the writer and release resources
 446  *
 447  * In particular, you can use this in conjunction with archive_read()
 448  * to pull entries out of an archive and create them on disk.
 449  */
 450 struct archive  *archive_write_disk_new(void);
 451 /* This file will not be overwritten. */
 452 int              archive_write_disk_set_skip_file(struct archive *,
 453                      dev_t, ino_t);
 454 /* Set flags to control how the next item gets created. */
 455 int              archive_write_disk_set_options(struct archive *,
 456                      int flags);
 457 /*
 458  * The lookup functions are given uname/uid (or gname/gid) pairs and
 459  * return a uid (gid) suitable for this system.  These are used for
 460  * restoring ownership and for setting ACLs.  The default functions
 461  * are naive, they just return the uid/gid.  These are small, so reasonable
 462  * for applications that don't need to preserve ownership; they
 463  * are probably also appropriate for applications that are doing
 464  * same-system backup and restore.
 465  */
 466 /*
 467  * The "standard" lookup functions use common system calls to lookup
 468  * the uname/gname, falling back to the uid/gid if the names can't be
 469  * found.  They cache lookups and are reasonably fast, but can be very
 470  * large, so they are not used unless you ask for them.  In
 471  * particular, these match the specifications of POSIX "pax" and old
 472  * POSIX "tar".
 473  */
 474 int              archive_write_disk_set_standard_lookup(struct archive *);
 475 /*
 476  * If neither the default (naive) nor the standard (big) functions suit
 477  * your needs, you can write your own and register them.  Be sure to
 478  * include a cleanup function if you have allocated private data.
 479  */
 480 int              archive_write_disk_set_group_lookup(struct archive *,
 481                      void *private_data,
 482                      gid_t (*loookup)(void *, const char *gname, gid_t gid),
 483                      void (*cleanup)(void *));
 484 int              archive_write_disk_set_user_lookup(struct archive *,
 485                      void *private_data,
 486                      uid_t (*)(void *, const char *uname, uid_t uid),
 487                      void (*cleanup)(void *));
 488
 489 /*
 490  * Accessor functions to read/set various information in
 491  * the struct archive object:
 492  */
 493 /* Bytes written after compression or read before decompression. */
 494 int64_t          archive_position_compressed(struct archive *);
 495 /* Bytes written to compressor or read from decompressor. */
 496 int64_t          archive_position_uncompressed(struct archive *);
 497
 498 const char      *archive_compression_name(struct archive *);
 499 int              archive_compression(struct archive *);
 500 int              archive_errno(struct archive *);
 501 const char      *archive_error_string(struct archive *);
 502 const char      *archive_format_name(struct archive *);
 503 int              archive_format(struct archive *);
 504 void             archive_clear_error(struct archive *);
 505 void             archive_set_error(struct archive *, int _err, const char *fmt, ...);
 506 void             archive_copy_error(struct archive *dest, struct archive *src);
 507
 508 #ifdef __cplusplus
 509 }
 510 #endif
 511
 512 #endif /* !ARCHIVE_H_INCLUDED */