/*- * Copyright (c) 2003-2004 Tim Kientzle * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer * in this position and unchanged. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * $FreeBSD$ */ #ifndef ARCHIVE_H_INCLUDED #define ARCHIVE_H_INCLUDED /* * If ARCHIVE_API_VERSION != archive_api_version(), then the library you * were linked with is using an incompatible API. This is almost * certainly a fatal problem. * * ARCHIVE_API_FEATURE is incremented with each significant feature * addition, so you can test (at compile or run time) if a particular * feature is implemented. It's no big deal if ARCHIVE_API_FEATURE != * archive_api_feature(), as long as both are high enough to include * the features you're relying on. Specific values of FEATURE are * documented here: * * 1 - Version tests are available. * 2 - archive_{read,write}_close available separately from _finish. */ #define ARCHIVE_API_VERSION @ARCHIVE_API_VERSION@ int archive_api_version(void); #define ARCHIVE_API_FEATURE @ARCHIVE_API_FEATURE@ int archive_api_feature(void); /* Textual name/version of the library. */ const char * archive_version(void); #include /* Linux requires this for off_t */ #include /* For int64_t */ #include /* For ssize_t and size_t */ #define ARCHIVE_BYTES_PER_RECORD 512 #define ARCHIVE_DEFAULT_BYTES_PER_BLOCK 10240 /* Declare our basic types. */ struct archive; struct archive_entry; /* * Error codes: Use archive_errno() and archive_error_string() * to retrieve details. Unless specified otherwise, all functions * that return 'int' use these codes. */ #define ARCHIVE_EOF 1 /* Found end of archive. */ #define ARCHIVE_OK 0 /* Operation was successful. */ #define ARCHIVE_RETRY (-10) /* Retry might succeed. */ #define ARCHIVE_WARN (-20) /* Partial sucess. */ #define ARCHIVE_FATAL (-30) /* No more operations are possible. */ /* * As far as possible, archive_errno returns standard platform errno codes. * Of course, the details vary by platform, so the actual definitions * here are stored in "archive_platform.h". The symbols are listed here * for reference; as a rule, clients should not need to know the exact * platform-dependent error code. */ /* Unrecognized or invalid file format. */ /* #define ARCHIVE_ERRNO_FILE_FORMAT */ /* Illegal usage of the library. */ /* #define ARCHIVE_ERRNO_PROGRAMMER_ERROR */ /* Unknown or unclassified error. */ /* #define ARCHIVE_ERRNO_MISC */ /* * Callbacks are invoked to automatically read/write/open/close the archive. * You can provide your own for complex tasks (like breaking archives * across multiple tapes) or use standard ones built into the library. */ /* Returns pointer and size of next block of data from archive. */ typedef ssize_t archive_read_callback(struct archive *, void *_client_data, const void **_buffer); /* Returns size actually written, zero on EOF, -1 on error. */ typedef ssize_t archive_write_callback(struct archive *, void *_client_data, void *_buffer, size_t _length); typedef int archive_open_callback(struct archive *, void *_client_data); typedef int archive_close_callback(struct archive *, void *_client_data); /* * Codes for archive_compression. */ #define ARCHIVE_COMPRESSION_NONE 0 #define ARCHIVE_COMPRESSION_GZIP 1 #define ARCHIVE_COMPRESSION_BZIP2 2 #define ARCHIVE_COMPRESSION_COMPRESS 3 /* * Codes returned by archive_format. * * Top 16 bits identifies the format family (e.g., "tar"); lower * 16 bits indicate the variant. This is updated by read_next_header. * Note that the lower 16 bits will often vary from entry to entry. */ #define ARCHIVE_FORMAT_BASE_MASK 0xff0000U #define ARCHIVE_FORMAT_CPIO 0x10000 #define ARCHIVE_FORMAT_CPIO_POSIX (ARCHIVE_FORMAT_CPIO | 1) #define ARCHIVE_FORMAT_SHAR 0x20000 #define ARCHIVE_FORMAT_SHAR_BASE (ARCHIVE_FORMAT_SHAR | 1) #define ARCHIVE_FORMAT_SHAR_DUMP (ARCHIVE_FORMAT_SHAR | 2) #define ARCHIVE_FORMAT_TAR 0x30000 #define ARCHIVE_FORMAT_TAR_USTAR (ARCHIVE_FORMAT_TAR | 1) #define ARCHIVE_FORMAT_TAR_PAX_INTERCHANGE (ARCHIVE_FORMAT_TAR | 2) #define ARCHIVE_FORMAT_TAR_PAX_RESTRICTED (ARCHIVE_FORMAT_TAR | 3) #define ARCHIVE_FORMAT_TAR_GNUTAR (ARCHIVE_FORMAT_TAR | 4) /*- * Basic outline for reading an archive: * 1) Ask archive_read_new for an archive reader object. * 2) Update any global properties as appropriate. * In particular, you'll certainly want to call appropriate * archive_read_support_XXX functions. * 3) Call archive_read_open_XXX to open the archive * 4) Repeatedly call archive_read_next_header to get information about * successive archive entries. Call archive_read_data to extract * data for entries of interest. * 5) Call archive_read_finish to end processing. */ struct archive *archive_read_new(void); /* * The archive_read_support_XXX calls enable auto-detect for this * archive handle. They also link in the necessary support code. * For example, if you don't want bzlib linked in, don't invoke * support_compression_bzip2(). The "all" functions provide the * obvious shorthand. */ int archive_read_support_compression_all(struct archive *); int archive_read_support_compression_bzip2(struct archive *); int archive_read_support_compression_compress(struct archive *); int archive_read_support_compression_gzip(struct archive *); int archive_read_support_compression_none(struct archive *); int archive_read_support_format_all(struct archive *); int archive_read_support_format_cpio(struct archive *); int archive_read_support_format_gnutar(struct archive *); int archive_read_support_format_tar(struct archive *); /* Open the archive using callbacks for archive I/O. */ int archive_read_open(struct archive *, void *_client_data, archive_open_callback *, archive_read_callback *, archive_close_callback *); /* * The archive_read_open_file function is a convenience function built * on archive_read_open that uses a canned callback suitable for * common situations. Note that a NULL filename indicates stdin. */ int archive_read_open_file(struct archive *, const char *_file, size_t _block_size); int archive_read_open_fd(struct archive *, int _fd, size_t _block_size); /* Parses and returns next entry header. */ int archive_read_next_header(struct archive *, struct archive_entry **); /* * Retrieve the byte offset in UNCOMPRESSED data where last-read * header started. */ int64_t archive_read_header_position(struct archive *); /* Read data from the body of an entry. Similar to read(2). */ ssize_t archive_read_data(struct archive *, void *, size_t); /* * A zero-copy version of archive_read_data that also exposes the file offset * of each returned block. Note that the client has no way to specify * the desired size of the block. The API does gaurantee that offsets will * be strictly increasing and that returned blocks will not overlap. */ int archive_read_data_block(struct archive *a, const void **buff, size_t *size, off_t *offset); /*- * Some convenience functions that are built on archive_read_data: * 'skip': skips entire entry * 'into_buffer': writes data into memory buffer that you provide * 'into_fd': writes data to specified filedes */ int archive_read_data_skip(struct archive *); int archive_read_data_into_buffer(struct archive *, void *buffer, ssize_t len); int archive_read_data_into_fd(struct archive *, int fd); /*- * Convenience function to recreate the current entry (whose header * has just been read) on disk. * * This does quite a bit more than just copy data to disk. It also: * - Creates intermediate directories as required. * - Manages directory permissions: non-writable directories will * be initially created with write permission enabled; when the * archive is closed, dir permissions are edited to the values specified * in the archive. * - Checks hardlinks: hardlinks will not be extracted unless the * linked-to file was also extracted within the same session. (TODO) */ /* The "flags" argument selects optional behavior, 'OR' the flags you want. */ /* TODO: The 'Default' comments here are not quite correct; clean this up. */ #define ARCHIVE_EXTRACT_OWNER (1) /* Default: owner/group not restored */ #define ARCHIVE_EXTRACT_PERM (2) /* Default: restore perm only for reg file*/ #define ARCHIVE_EXTRACT_TIME (4) /* Default: mod time not restored */ #define ARCHIVE_EXTRACT_NO_OVERWRITE (8) /* Default: Replace files on disk */ #define ARCHIVE_EXTRACT_UNLINK (16) /* Default: don't unlink existing files */ #define ARCHIVE_EXTRACT_ACL (32) /* Default: don't restore ACLs */ #define ARCHIVE_EXTRACT_FFLAGS (64) /* Default: don't restore fflags */ int archive_read_extract(struct archive *, struct archive_entry *, int flags); void archive_read_extract_set_progress_callback(struct archive *, void (*_progress_func)(void *), void *_user_data); /* Close the file and release most resources. */ int archive_read_close(struct archive *); /* Release all resources and destroy the object. */ /* Note that archive_read_finish will call archive_read_close for you. */ void archive_read_finish(struct archive *); /*- * To create an archive: * 1) Ask archive_write_new for a archive writer object. * 2) Set any global properties. In particular, you should register * open/write/close callbacks. * 3) Call archive_write_open to open the file * 4) For each entry: * - construct an appropriate struct archive_entry structure * - archive_write_header to write the header * - archive_write_data to write the entry data * 5) archive_write_close to close the output * 6) archive_write_finish to cleanup the writer and release resources */ struct archive *archive_write_new(void); int archive_write_set_bytes_per_block(struct archive *, int bytes_per_block); /* XXX This is badly misnamed; suggestions appreciated. XXX */ int archive_write_set_bytes_in_last_block(struct archive *, int bytes_in_last_block); int archive_write_set_compression_bzip2(struct archive *); int archive_write_set_compression_gzip(struct archive *); int archive_write_set_compression_none(struct archive *); /* A convenience function to set the format based on the code or name. */ int archive_write_set_format(struct archive *, int format_code); int archive_write_set_format_by_name(struct archive *, const char *name); /* To minimize link pollution, use one or more of the following. */ int archive_write_set_format_cpio(struct archive *); /* TODO: int archive_write_set_format_old_tar(struct archive *); */ int archive_write_set_format_pax(struct archive *); int archive_write_set_format_pax_restricted(struct archive *); int archive_write_set_format_shar(struct archive *); int archive_write_set_format_shar_dump(struct archive *); int archive_write_set_format_ustar(struct archive *); int archive_write_open(struct archive *, void *, archive_open_callback *, archive_write_callback *, archive_close_callback *); int archive_write_open_fd(struct archive *, int _fd); int archive_write_open_file(struct archive *, const char *_file); /* * Note that the library will truncate writes beyond the size provided * to archive_write_header or pad if the provided data is short. */ int archive_write_header(struct archive *, struct archive_entry *); int archive_write_data(struct archive *, const void *, size_t); int archive_write_close(struct archive *); void archive_write_finish(struct archive *); /* * 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_set_error(struct archive *, int _err, const char *fmt, ...); #endif /* !ARCHIVE_H_INCLUDED */