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2304493774
* The ACL formatter was mis-formatting entries which had a
user/group ID but no name. Make the parser tolerant of
these, so that old archives can be correctly restored;
fix the formatter to generate correct entries.
* Fix overwrite detection by introducing a new "FAILED" return
code that indicates the current entry cannot be continued
but the archive as a whole is still sound.
* Header cleanup: Remove some unused headers, add some that
are required with new Linux systems.
497 lines
21 KiB
C
497 lines
21 KiB
C
/*-
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* Copyright (c) 2003-2007 Tim Kientzle
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef ARCHIVE_H_INCLUDED
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#define ARCHIVE_H_INCLUDED
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/*
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* This header file corresponds to:
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* Library version @VERSION@
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* Shared library version @SHLIB_MAJOR@
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*/
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#include <sys/types.h> /* Linux requires this for off_t */
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@ARCHIVE_H_INCLUDE_INTTYPES_H@
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#include <stdio.h> /* For FILE * */
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#ifndef _WIN32
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#include <unistd.h> /* For ssize_t and size_t */
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#else
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typedef long ssize_t;
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typedef unsigned int uid_t;
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typedef unsigned int gid_t;
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typedef unsigned short mode_t;
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#endif
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* If ARCHIVE_API_VERSION != archive_api_version(), then the library you
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* were linked with is using an incompatible API to the one you were
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* compiled with. This is almost certainly a fatal problem.
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*
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* ARCHIVE_API_FEATURE is incremented with each significant feature
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* addition, so you can test (at compile or run time) if a particular
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* feature is implemented. It's no big deal if ARCHIVE_API_FEATURE !=
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* archive_api_feature(), as long as both are high enough to include
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* the features you're relying on. Specific values of FEATURE are
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* documented here:
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*
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* 1 - Version tests are available.
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* 2 - archive_{read,write}_close available separately from _finish.
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* 3 - open_memory, open_memory2, open_FILE, open_fd available
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* 5 - archive_write_disk interface available
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*/
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#define ARCHIVE_API_VERSION @ARCHIVE_API_MAJOR@
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int archive_api_version(void);
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#define ARCHIVE_API_FEATURE @ARCHIVE_API_MINOR@
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int archive_api_feature(void);
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/* Textual name/version of the library. */
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#define ARCHIVE_LIBRARY_VERSION "libarchive @VERSION@"
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const char * archive_version(void);
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#define ARCHIVE_BYTES_PER_RECORD 512
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#define ARCHIVE_DEFAULT_BYTES_PER_BLOCK 10240
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/* Declare our basic types. */
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struct archive;
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struct archive_entry;
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/*
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* Error codes: Use archive_errno() and archive_error_string()
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* to retrieve details. Unless specified otherwise, all functions
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* that return 'int' use these codes.
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*/
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#define ARCHIVE_EOF 1 /* Found end of archive. */
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#define ARCHIVE_OK 0 /* Operation was successful. */
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#define ARCHIVE_RETRY (-10) /* Retry might succeed. */
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#define ARCHIVE_WARN (-20) /* Partial success. */
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/* For example, if write_header "fails", then you can't push data. */
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#define ARCHIVE_FAILED (-25) /* Current operation cannot complete. */
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#define ARCHIVE_FATAL (-30) /* No more operations are possible. */
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/*
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* As far as possible, archive_errno returns standard platform errno codes.
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* Of course, the details vary by platform, so the actual definitions
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* here are stored in "archive_platform.h". The symbols are listed here
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* for reference; as a rule, clients should not need to know the exact
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* platform-dependent error code.
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*/
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/* Unrecognized or invalid file format. */
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/* #define ARCHIVE_ERRNO_FILE_FORMAT */
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/* Illegal usage of the library. */
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/* #define ARCHIVE_ERRNO_PROGRAMMER_ERROR */
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/* Unknown or unclassified error. */
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/* #define ARCHIVE_ERRNO_MISC */
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/*
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* Callbacks are invoked to automatically read/skip/write/open/close the
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* archive. You can provide your own for complex tasks (like breaking
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* archives across multiple tapes) or use standard ones built into the
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* library.
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*/
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/* Returns pointer and size of next block of data from archive. */
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typedef ssize_t archive_read_callback(struct archive *, void *_client_data,
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const void **_buffer);
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/* Skips at most request bytes from archive and returns the skipped amount */
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#if ARCHIVE_API_VERSION < 2
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typedef ssize_t archive_skip_callback(struct archive *, void *_client_data,
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size_t request);
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#else
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typedef off_t archive_skip_callback(struct archive *, void *_client_data,
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off_t request);
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#endif
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/* Returns size actually written, zero on EOF, -1 on error. */
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typedef ssize_t archive_write_callback(struct archive *, void *_client_data,
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const void *_buffer, size_t _length);
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typedef int archive_open_callback(struct archive *, void *_client_data);
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typedef int archive_close_callback(struct archive *, void *_client_data);
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/*
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* Codes for archive_compression.
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*/
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#define ARCHIVE_COMPRESSION_NONE 0
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#define ARCHIVE_COMPRESSION_GZIP 1
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#define ARCHIVE_COMPRESSION_BZIP2 2
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#define ARCHIVE_COMPRESSION_COMPRESS 3
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/*
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* Codes returned by archive_format.
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*
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* Top 16 bits identifies the format family (e.g., "tar"); lower
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* 16 bits indicate the variant. This is updated by read_next_header.
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* Note that the lower 16 bits will often vary from entry to entry.
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* In some cases, this variation occurs as libarchive learns more about
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* the archive (for example, later entries might utilize extensions that
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* weren't necessary earlier in the archive; in this case, libarchive
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* will change the format code to indicate the extended format that
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* was used). In other cases, it's because different tools have
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* modified the archive and so different parts of the archive
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* actually have slightly different formts. (Both tar and cpio store
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* format codes in each entry, so it is quite possible for each
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* entry to be in a different format.)
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*/
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#define ARCHIVE_FORMAT_BASE_MASK 0xff0000
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#define ARCHIVE_FORMAT_CPIO 0x10000
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#define ARCHIVE_FORMAT_CPIO_POSIX (ARCHIVE_FORMAT_CPIO | 1)
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#define ARCHIVE_FORMAT_CPIO_BIN_LE (ARCHIVE_FORMAT_CPIO | 2)
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#define ARCHIVE_FORMAT_CPIO_BIN_BE (ARCHIVE_FORMAT_CPIO | 3)
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#define ARCHIVE_FORMAT_CPIO_SVR4_NOCRC (ARCHIVE_FORMAT_CPIO | 4)
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#define ARCHIVE_FORMAT_CPIO_SVR4_CRC (ARCHIVE_FORMAT_CPIO | 5)
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#define ARCHIVE_FORMAT_SHAR 0x20000
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#define ARCHIVE_FORMAT_SHAR_BASE (ARCHIVE_FORMAT_SHAR | 1)
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#define ARCHIVE_FORMAT_SHAR_DUMP (ARCHIVE_FORMAT_SHAR | 2)
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#define ARCHIVE_FORMAT_TAR 0x30000
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#define ARCHIVE_FORMAT_TAR_USTAR (ARCHIVE_FORMAT_TAR | 1)
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#define ARCHIVE_FORMAT_TAR_PAX_INTERCHANGE (ARCHIVE_FORMAT_TAR | 2)
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#define ARCHIVE_FORMAT_TAR_PAX_RESTRICTED (ARCHIVE_FORMAT_TAR | 3)
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#define ARCHIVE_FORMAT_TAR_GNUTAR (ARCHIVE_FORMAT_TAR | 4)
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#define ARCHIVE_FORMAT_ISO9660 0x40000
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#define ARCHIVE_FORMAT_ISO9660_ROCKRIDGE (ARCHIVE_FORMAT_ISO9660 | 1)
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#define ARCHIVE_FORMAT_ZIP 0x50000
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#define ARCHIVE_FORMAT_EMPTY 0x60000
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/*-
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* Basic outline for reading an archive:
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* 1) Ask archive_read_new for an archive reader object.
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* 2) Update any global properties as appropriate.
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* In particular, you'll certainly want to call appropriate
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* archive_read_support_XXX functions.
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* 3) Call archive_read_open_XXX to open the archive
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* 4) Repeatedly call archive_read_next_header to get information about
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* successive archive entries. Call archive_read_data to extract
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* data for entries of interest.
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* 5) Call archive_read_finish to end processing.
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*/
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struct archive *archive_read_new(void);
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/*
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* The archive_read_support_XXX calls enable auto-detect for this
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* archive handle. They also link in the necessary support code.
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* For example, if you don't want bzlib linked in, don't invoke
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* support_compression_bzip2(). The "all" functions provide the
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* obvious shorthand.
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*/
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int archive_read_support_compression_all(struct archive *);
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int archive_read_support_compression_bzip2(struct archive *);
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int archive_read_support_compression_compress(struct archive *);
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int archive_read_support_compression_gzip(struct archive *);
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int archive_read_support_compression_none(struct archive *);
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int archive_read_support_format_all(struct archive *);
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int archive_read_support_format_cpio(struct archive *);
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int archive_read_support_format_empty(struct archive *);
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int archive_read_support_format_gnutar(struct archive *);
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int archive_read_support_format_iso9660(struct archive *);
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int archive_read_support_format_tar(struct archive *);
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int archive_read_support_format_zip(struct archive *);
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/* Open the archive using callbacks for archive I/O. */
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int archive_read_open(struct archive *, void *_client_data,
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archive_open_callback *, archive_read_callback *,
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archive_close_callback *);
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int archive_read_open2(struct archive *, void *_client_data,
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archive_open_callback *, archive_read_callback *,
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archive_skip_callback *, archive_close_callback *);
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/*
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* A variety of shortcuts that invoke archive_read_open() with
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* canned callbacks suitable for common situations. The ones that
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* accept a block size handle tape blocking correctly.
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*/
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/* Use this if you know the filename. Note: NULL indicates stdin. */
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int archive_read_open_filename(struct archive *,
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const char *_filename, size_t _block_size);
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/* archive_read_open_file() is a deprecated synonym for ..._open_filename(). */
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int archive_read_open_file(struct archive *,
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const char *_filename, size_t _block_size);
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/* Read an archive that's stored in memory. */
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int archive_read_open_memory(struct archive *,
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void * buff, size_t size);
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/* A more involved version that is only used for internal testing. */
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int archive_read_open_memory2(struct archive *a, void *buff,
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size_t size, size_t read_size);
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/* Read an archive that's already open, using the file descriptor. */
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int archive_read_open_fd(struct archive *, int _fd,
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size_t _block_size);
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/* Read an archive that's already open, using a FILE *. */
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/* Note: DO NOT use this with tape drives. */
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int archive_read_open_FILE(struct archive *, FILE *_file);
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/* Parses and returns next entry header. */
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int archive_read_next_header(struct archive *,
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struct archive_entry **);
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/*
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* Retrieve the byte offset in UNCOMPRESSED data where last-read
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* header started.
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*/
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int64_t archive_read_header_position(struct archive *);
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/* Read data from the body of an entry. Similar to read(2). */
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ssize_t archive_read_data(struct archive *, void *, size_t);
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/*
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* A zero-copy version of archive_read_data that also exposes the file offset
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* of each returned block. Note that the client has no way to specify
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* the desired size of the block. The API does guarantee that offsets will
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* be strictly increasing and that returned blocks will not overlap.
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*/
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int archive_read_data_block(struct archive *a,
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const void **buff, size_t *size, off_t *offset);
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/*-
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* Some convenience functions that are built on archive_read_data:
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* 'skip': skips entire entry
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* 'into_buffer': writes data into memory buffer that you provide
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* 'into_fd': writes data to specified filedes
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*/
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int archive_read_data_skip(struct archive *);
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int archive_read_data_into_buffer(struct archive *, void *buffer,
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ssize_t len);
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int archive_read_data_into_fd(struct archive *, int fd);
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/*-
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* Convenience function to recreate the current entry (whose header
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* has just been read) on disk.
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*
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* This does quite a bit more than just copy data to disk. It also:
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* - Creates intermediate directories as required.
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* - Manages directory permissions: non-writable directories will
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* be initially created with write permission enabled; when the
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* archive is closed, dir permissions are edited to the values specified
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* in the archive.
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* - Checks hardlinks: hardlinks will not be extracted unless the
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* linked-to file was also extracted within the same session. (TODO)
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*/
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/* The "flags" argument selects optional behavior, 'OR' the flags you want. */
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/* Default: Do not try to set owner/group. */
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#define ARCHIVE_EXTRACT_OWNER (1)
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/* Default: Do obey umask, do not restore SUID/SGID/SVTX bits. */
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#define ARCHIVE_EXTRACT_PERM (2)
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/* Default: Do not restore mtime/atime. */
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#define ARCHIVE_EXTRACT_TIME (4)
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/* Default: Replace existing files. */
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#define ARCHIVE_EXTRACT_NO_OVERWRITE (8)
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/* Default: Try create first, unlink only if create fails with EEXIST. */
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#define ARCHIVE_EXTRACT_UNLINK (16)
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/* Default: Do not restore ACLs. */
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#define ARCHIVE_EXTRACT_ACL (32)
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/* Default: Do not restore fflags. */
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#define ARCHIVE_EXTRACT_FFLAGS (64)
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/* Default: Do not restore xattrs. */
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#define ARCHIVE_EXTRACT_XATTR (128)
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/* Default: Do not try to guard against extracts redirected by symlinks. */
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/* Note: With ARCHIVE_EXTRACT_UNLINK, will remove any intermediate symlink. */
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#define ARCHIVE_EXTRACT_SECURE_SYMLINKS (256)
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/* Default: Do not reject entries with '..' as path elements. */
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#define ARCHIVE_EXTRACT_SECURE_NODOTDOT (512)
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int archive_read_extract(struct archive *, struct archive_entry *,
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int flags);
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void archive_read_extract_set_progress_callback(struct archive *,
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void (*_progress_func)(void *), void *_user_data);
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/* Record the dev/ino of a file that will not be written. This is
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* generally set to the dev/ino of the archive being read. */
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void archive_read_extract_set_skip_file(struct archive *,
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dev_t, ino_t);
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/* Close the file and release most resources. */
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int archive_read_close(struct archive *);
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/* Release all resources and destroy the object. */
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/* Note that archive_read_finish will call archive_read_close for you. */
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#if ARCHIVE_API_VERSION > 1
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int archive_read_finish(struct archive *);
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#else
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/* Temporarily allow library to compile with either 1.x or 2.0 API. */
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/* Erroneously declared to return void in libarchive 1.x */
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void archive_read_finish(struct archive *);
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#endif
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/*-
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* To create an archive:
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* 1) Ask archive_write_new for a archive writer object.
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* 2) Set any global properties. In particular, you should set
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* the compression and format to use.
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* 3) Call archive_write_open to open the file (most people
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* will use archive_write_open_file or archive_write_open_fd,
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* which provide convenient canned I/O callbacks for you).
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* 4) For each entry:
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* - construct an appropriate struct archive_entry structure
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* - archive_write_header to write the header
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* - archive_write_data to write the entry data
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* 5) archive_write_close to close the output
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* 6) archive_write_finish to cleanup the writer and release resources
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*/
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struct archive *archive_write_new(void);
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int archive_write_set_bytes_per_block(struct archive *,
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int bytes_per_block);
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int archive_write_get_bytes_per_block(struct archive *);
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/* XXX This is badly misnamed; suggestions appreciated. XXX */
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int archive_write_set_bytes_in_last_block(struct archive *,
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int bytes_in_last_block);
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int archive_write_get_bytes_in_last_block(struct archive *);
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/* The dev/ino of a file that won't be archived. This is used
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* to avoid recursively adding an archive to itself. */
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int archive_write_set_skip_file(struct archive *, dev_t, ino_t);
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int archive_write_set_compression_bzip2(struct archive *);
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int archive_write_set_compression_gzip(struct archive *);
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int archive_write_set_compression_none(struct archive *);
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/* A convenience function to set the format based on the code or name. */
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int archive_write_set_format(struct archive *, int format_code);
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int archive_write_set_format_by_name(struct archive *,
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const char *name);
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/* To minimize link pollution, use one or more of the following. */
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int archive_write_set_format_cpio(struct archive *);
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/* TODO: int archive_write_set_format_old_tar(struct archive *); */
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int archive_write_set_format_pax(struct archive *);
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int archive_write_set_format_pax_restricted(struct archive *);
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int archive_write_set_format_shar(struct archive *);
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int archive_write_set_format_shar_dump(struct archive *);
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int archive_write_set_format_ustar(struct archive *);
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int archive_write_open(struct archive *, void *,
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archive_open_callback *, archive_write_callback *,
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archive_close_callback *);
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int archive_write_open_fd(struct archive *, int _fd);
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int archive_write_open_filename(struct archive *, const char *_file);
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/* A deprecated synonym for archive_write_open_filename() */
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int archive_write_open_file(struct archive *, const char *_file);
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int archive_write_open_FILE(struct archive *, FILE *);
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/* _buffSize is the size of the buffer, _used refers to a variable that
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* will be updated after each write into the buffer. */
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int archive_write_open_memory(struct archive *,
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void *_buffer, size_t _buffSize, size_t *_used);
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/*
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* Note that the library will truncate writes beyond the size provided
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* to archive_write_header or pad if the provided data is short.
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*/
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int archive_write_header(struct archive *,
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struct archive_entry *);
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#if ARCHIVE_API_VERSION > 1
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ssize_t archive_write_data(struct archive *, const void *, size_t);
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#else
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/* Temporarily allow library to compile with either 1.x or 2.0 API. */
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/* This was erroneously declared to return "int" in libarchive 1.x. */
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int archive_write_data(struct archive *, const void *, size_t);
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#endif
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ssize_t archive_write_data_block(struct archive *, const void *, size_t, off_t);
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int archive_write_finish_entry(struct archive *);
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int archive_write_close(struct archive *);
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#if ARCHIVE_API_VERSION > 1
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int archive_write_finish(struct archive *);
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#else
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/* Temporarily allow library to compile with either 1.x or 2.0 API. */
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/* Return value was incorrect in libarchive 1.x. */
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void archive_write_finish(struct archive *);
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#endif
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/*-
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* To create objects on disk:
|
|
* 1) Ask archive_write_disk_new for a new archive_write_disk object.
|
|
* 2) Set any global properties. In particular, you should set
|
|
* the compression and format to use.
|
|
* 3) For each entry:
|
|
* - construct an appropriate struct archive_entry structure
|
|
* - archive_write_header to create the file/dir/etc on disk
|
|
* - archive_write_data to write the entry data
|
|
* 4) archive_write_finish to cleanup the writer and release resources
|
|
*
|
|
* In particular, you can use this in conjunction with archive_read()
|
|
* to pull entries out of an archive and create them on disk.
|
|
*/
|
|
struct archive *archive_write_disk_new(void);
|
|
/* This file will not be overwritten. */
|
|
int archive_write_disk_set_skip_file(struct archive *,
|
|
dev_t, ino_t);
|
|
/* Set flags to control how the next item gets created. */
|
|
int archive_write_disk_set_options(struct archive *,
|
|
int flags);
|
|
/*
|
|
* The lookup functions are given uname/uid (or gname/gid) pairs and
|
|
* return a uid (gid) suitable for this system. These are used for
|
|
* restoring ownership and for setting ACLs. The default functions
|
|
* are naive, they just return the uid/gid. These are small, so reasonable
|
|
* for applications that don't need to preserve ownership; they
|
|
* are probably also appropriate for applications that are doing
|
|
* same-system backup and restore.
|
|
*/
|
|
/*
|
|
* The "standard" lookup functions use common system calls to lookup
|
|
* the uname/gname, falling back to the uid/gid if the names can't be
|
|
* found. They cache lookups and are reasonably fast, but can be very
|
|
* large, so they are not used unless you ask for them. In
|
|
* particular, these match the specifications of POSIX "pax" and old
|
|
* POSIX "tar".
|
|
*/
|
|
int archive_write_disk_set_standard_lookup(struct archive *);
|
|
/*
|
|
* If neither the default (naive) nor the standard (big) functions suit
|
|
* your needs, you can write your own and register them. Be sure to
|
|
* include a cleanup function if you have allocated private data.
|
|
*/
|
|
int archive_write_disk_set_group_lookup(struct archive *,
|
|
void *private_data,
|
|
gid_t (*loookup)(void *, const char *gname, gid_t gid),
|
|
void (*cleanup)(void *));
|
|
int archive_write_disk_set_user_lookup(struct archive *,
|
|
void *private_data,
|
|
uid_t (*)(void *, const char *uname, uid_t uid),
|
|
void (*cleanup)(void *));
|
|
|
|
/*
|
|
* Accessor functions to read/set various information in
|
|
* the struct archive object:
|
|
*/
|
|
/* Bytes written after compression or read before decompression. */
|
|
int64_t archive_position_compressed(struct archive *);
|
|
/* Bytes written to compressor or read from decompressor. */
|
|
int64_t archive_position_uncompressed(struct archive *);
|
|
|
|
const char *archive_compression_name(struct archive *);
|
|
int archive_compression(struct archive *);
|
|
int archive_errno(struct archive *);
|
|
const char *archive_error_string(struct archive *);
|
|
const char *archive_format_name(struct archive *);
|
|
int archive_format(struct archive *);
|
|
void archive_clear_error(struct archive *);
|
|
void archive_set_error(struct archive *, int _err, const char *fmt, ...);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* !ARCHIVE_H_INCLUDED */
|