989 lines
26 KiB
C
989 lines
26 KiB
C
/*-
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* Copyright (c) 2009-2011 Michihiro NAKAJIMA
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* Copyright (c) 2003-2008 Tim Kientzle and Miklos Vajna
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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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#include "archive_platform.h"
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__FBSDID("$FreeBSD$");
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#ifdef HAVE_ERRNO_H
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#include <errno.h>
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#endif
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#include <stdio.h>
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#if HAVE_LZMA_H
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#include <cm_lzma.h>
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#elif HAVE_LZMADEC_H
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#include <lzmadec.h>
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#endif
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#include "archive.h"
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#include "archive_endian.h"
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#include "archive_private.h"
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#include "archive_read_private.h"
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#if HAVE_LZMA_H && HAVE_LIBLZMA
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struct private_data {
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lzma_stream stream;
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unsigned char *out_block;
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size_t out_block_size;
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int64_t total_out;
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char eof; /* True = found end of compressed data. */
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char in_stream;
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/* Following variables are used for lzip only. */
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char lzip_ver;
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uint32_t crc32;
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int64_t member_in;
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int64_t member_out;
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};
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#if LZMA_VERSION_MAJOR >= 5
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/* Effectively disable the limiter. */
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#define LZMA_MEMLIMIT UINT64_MAX
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#else
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/* NOTE: This needs to check memory size which running system has. */
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#define LZMA_MEMLIMIT (1U << 30)
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#endif
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/* Combined lzip/lzma/xz filter */
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static ssize_t xz_filter_read(struct archive_read_filter *, const void **);
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static int xz_filter_close(struct archive_read_filter *);
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static int xz_lzma_bidder_init(struct archive_read_filter *);
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#elif HAVE_LZMADEC_H && HAVE_LIBLZMADEC
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struct private_data {
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lzmadec_stream stream;
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unsigned char *out_block;
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size_t out_block_size;
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int64_t total_out;
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char eof; /* True = found end of compressed data. */
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};
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/* Lzma-only filter */
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static ssize_t lzma_filter_read(struct archive_read_filter *, const void **);
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static int lzma_filter_close(struct archive_read_filter *);
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#endif
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/*
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* Note that we can detect xz and lzma compressed files even if we
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* can't decompress them. (In fact, we like detecting them because we
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* can give better error messages.) So the bid framework here gets
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* compiled even if no lzma library is available.
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*/
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static int xz_bidder_bid(struct archive_read_filter_bidder *,
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struct archive_read_filter *);
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static int xz_bidder_init(struct archive_read_filter *);
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static int lzma_bidder_bid(struct archive_read_filter_bidder *,
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struct archive_read_filter *);
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static int lzma_bidder_init(struct archive_read_filter *);
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static int lzip_has_member(struct archive_read_filter *);
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static int lzip_bidder_bid(struct archive_read_filter_bidder *,
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struct archive_read_filter *);
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static int lzip_bidder_init(struct archive_read_filter *);
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#if ARCHIVE_VERSION_NUMBER < 4000000
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/* Deprecated; remove in libarchive 4.0 */
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int
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archive_read_support_compression_xz(struct archive *a)
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{
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return archive_read_support_filter_xz(a);
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}
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#endif
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int
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archive_read_support_filter_xz(struct archive *_a)
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{
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struct archive_read *a = (struct archive_read *)_a;
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struct archive_read_filter_bidder *bidder;
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archive_check_magic(_a, ARCHIVE_READ_MAGIC,
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ARCHIVE_STATE_NEW, "archive_read_support_filter_xz");
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if (__archive_read_get_bidder(a, &bidder) != ARCHIVE_OK)
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return (ARCHIVE_FATAL);
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bidder->data = NULL;
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bidder->name = "xz";
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bidder->bid = xz_bidder_bid;
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bidder->init = xz_bidder_init;
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bidder->options = NULL;
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bidder->free = NULL;
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#if HAVE_LZMA_H && HAVE_LIBLZMA
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return (ARCHIVE_OK);
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#else
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archive_set_error(_a, ARCHIVE_ERRNO_MISC,
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"Using external xz program for xz decompression");
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return (ARCHIVE_WARN);
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#endif
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}
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#if ARCHIVE_VERSION_NUMBER < 4000000
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int
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archive_read_support_compression_lzma(struct archive *a)
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{
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return archive_read_support_filter_lzma(a);
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}
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#endif
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int
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archive_read_support_filter_lzma(struct archive *_a)
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{
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struct archive_read *a = (struct archive_read *)_a;
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struct archive_read_filter_bidder *bidder;
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archive_check_magic(_a, ARCHIVE_READ_MAGIC,
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ARCHIVE_STATE_NEW, "archive_read_support_filter_lzma");
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if (__archive_read_get_bidder(a, &bidder) != ARCHIVE_OK)
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return (ARCHIVE_FATAL);
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bidder->data = NULL;
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bidder->name = "lzma";
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bidder->bid = lzma_bidder_bid;
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bidder->init = lzma_bidder_init;
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bidder->options = NULL;
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bidder->free = NULL;
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#if HAVE_LZMA_H && HAVE_LIBLZMA
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return (ARCHIVE_OK);
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#elif HAVE_LZMADEC_H && HAVE_LIBLZMADEC
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return (ARCHIVE_OK);
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#else
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archive_set_error(_a, ARCHIVE_ERRNO_MISC,
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"Using external lzma program for lzma decompression");
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return (ARCHIVE_WARN);
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#endif
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}
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#if ARCHIVE_VERSION_NUMBER < 4000000
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int
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archive_read_support_compression_lzip(struct archive *a)
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{
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return archive_read_support_filter_lzip(a);
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}
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#endif
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int
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archive_read_support_filter_lzip(struct archive *_a)
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{
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struct archive_read *a = (struct archive_read *)_a;
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struct archive_read_filter_bidder *bidder;
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archive_check_magic(_a, ARCHIVE_READ_MAGIC,
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ARCHIVE_STATE_NEW, "archive_read_support_filter_lzip");
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if (__archive_read_get_bidder(a, &bidder) != ARCHIVE_OK)
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return (ARCHIVE_FATAL);
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bidder->data = NULL;
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bidder->name = "lzip";
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bidder->bid = lzip_bidder_bid;
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bidder->init = lzip_bidder_init;
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bidder->options = NULL;
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bidder->free = NULL;
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#if HAVE_LZMA_H && HAVE_LIBLZMA
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return (ARCHIVE_OK);
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#else
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archive_set_error(_a, ARCHIVE_ERRNO_MISC,
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"Using external lzip program for lzip decompression");
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return (ARCHIVE_WARN);
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#endif
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}
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/*
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* Test whether we can handle this data.
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*/
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static int
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xz_bidder_bid(struct archive_read_filter_bidder *self,
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struct archive_read_filter *filter)
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{
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const unsigned char *buffer;
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ssize_t avail;
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(void)self; /* UNUSED */
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buffer = __archive_read_filter_ahead(filter, 6, &avail);
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if (buffer == NULL)
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return (0);
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/*
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* Verify Header Magic Bytes : FD 37 7A 58 5A 00
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*/
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if (memcmp(buffer, "\xFD\x37\x7A\x58\x5A\x00", 6) != 0)
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return (0);
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return (48);
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}
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/*
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* Test whether we can handle this data.
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*
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* <sigh> LZMA has a rather poor file signature. Zeros do not
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* make good signature bytes as a rule, and the only non-zero byte
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* here is an ASCII character. For example, an uncompressed tar
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* archive whose first file is ']' would satisfy this check. It may
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* be necessary to exclude LZMA from compression_all() because of
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* this. Clients of libarchive would then have to explicitly enable
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* LZMA checking instead of (or in addition to) compression_all() when
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* they have other evidence (file name, command-line option) to go on.
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*/
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static int
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lzma_bidder_bid(struct archive_read_filter_bidder *self,
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struct archive_read_filter *filter)
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{
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const unsigned char *buffer;
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ssize_t avail;
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uint32_t dicsize;
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uint64_t uncompressed_size;
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int bits_checked;
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(void)self; /* UNUSED */
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buffer = __archive_read_filter_ahead(filter, 14, &avail);
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if (buffer == NULL)
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return (0);
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/* First byte of raw LZMA stream is commonly 0x5d.
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* The first byte is a special number, which consists of
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* three parameters of LZMA compression, a number of literal
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* context bits(which is from 0 to 8, default is 3), a number
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* of literal pos bits(which is from 0 to 4, default is 0),
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* a number of pos bits(which is from 0 to 4, default is 2).
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* The first byte is made by
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* (pos bits * 5 + literal pos bit) * 9 + * literal contest bit,
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* and so the default value in this field is
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* (2 * 5 + 0) * 9 + 3 = 0x5d.
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* lzma of LZMA SDK has options to change those parameters.
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* It means a range of this field is from 0 to 224. And lzma of
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* XZ Utils with option -e records 0x5e in this field. */
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/* NOTE: If this checking of the first byte increases false
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* recognition, we should allow only 0x5d and 0x5e for the first
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* byte of LZMA stream. */
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bits_checked = 0;
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if (buffer[0] > (4 * 5 + 4) * 9 + 8)
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return (0);
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/* Most likely value in the first byte of LZMA stream. */
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if (buffer[0] == 0x5d || buffer[0] == 0x5e)
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bits_checked += 8;
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/* Sixth through fourteenth bytes are uncompressed size,
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* stored in little-endian order. `-1' means uncompressed
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* size is unknown and lzma of XZ Utils always records `-1'
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* in this field. */
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uncompressed_size = archive_le64dec(buffer+5);
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if (uncompressed_size == (uint64_t)ARCHIVE_LITERAL_LL(-1))
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bits_checked += 64;
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/* Second through fifth bytes are dictionary size, stored in
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* little-endian order. The minimum dictionary size is
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* 1 << 12(4KiB) which the lzma of LZMA SDK uses with option
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* -d12 and the maxinam dictionary size is 1 << 27(128MiB)
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* which the one uses with option -d27.
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* NOTE: A comment of LZMA SDK source code says this dictionary
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* range is from 1 << 12 to 1 << 30. */
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dicsize = archive_le32dec(buffer+1);
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switch (dicsize) {
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case 0x00001000:/* lzma of LZMA SDK option -d12. */
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case 0x00002000:/* lzma of LZMA SDK option -d13. */
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case 0x00004000:/* lzma of LZMA SDK option -d14. */
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case 0x00008000:/* lzma of LZMA SDK option -d15. */
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case 0x00010000:/* lzma of XZ Utils option -0 and -1.
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* lzma of LZMA SDK option -d16. */
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case 0x00020000:/* lzma of LZMA SDK option -d17. */
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case 0x00040000:/* lzma of LZMA SDK option -d18. */
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case 0x00080000:/* lzma of XZ Utils option -2.
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* lzma of LZMA SDK option -d19. */
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case 0x00100000:/* lzma of XZ Utils option -3.
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* lzma of LZMA SDK option -d20. */
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case 0x00200000:/* lzma of XZ Utils option -4.
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* lzma of LZMA SDK option -d21. */
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case 0x00400000:/* lzma of XZ Utils option -5.
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* lzma of LZMA SDK option -d22. */
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case 0x00800000:/* lzma of XZ Utils option -6.
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* lzma of LZMA SDK option -d23. */
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case 0x01000000:/* lzma of XZ Utils option -7.
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* lzma of LZMA SDK option -d24. */
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case 0x02000000:/* lzma of XZ Utils option -8.
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* lzma of LZMA SDK option -d25. */
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case 0x04000000:/* lzma of XZ Utils option -9.
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* lzma of LZMA SDK option -d26. */
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case 0x08000000:/* lzma of LZMA SDK option -d27. */
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bits_checked += 32;
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break;
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default:
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/* If a memory usage for encoding was not enough on
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* the platform where LZMA stream was made, lzma of
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* XZ Utils automatically decreased the dictionary
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* size to enough memory for encoding by 1Mi bytes
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* (1 << 20).*/
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if (dicsize <= 0x03F00000 && dicsize >= 0x00300000 &&
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(dicsize & ((1 << 20)-1)) == 0 &&
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bits_checked == 8 + 64) {
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bits_checked += 32;
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break;
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}
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/* Otherwise dictionary size is unlikely. But it is
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* possible that someone makes lzma stream with
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* liblzma/LZMA SDK in one's dictionary size. */
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return (0);
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}
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/* TODO: The above test is still very weak. It would be
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* good to do better. */
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return (bits_checked);
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}
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static int
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lzip_has_member(struct archive_read_filter *filter)
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{
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const unsigned char *buffer;
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ssize_t avail;
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int bits_checked;
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int log2dic;
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buffer = __archive_read_filter_ahead(filter, 6, &avail);
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if (buffer == NULL)
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return (0);
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/*
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* Verify Header Magic Bytes : 4C 5A 49 50 (`LZIP')
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*/
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bits_checked = 0;
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if (memcmp(buffer, "LZIP", 4) != 0)
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return (0);
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bits_checked += 32;
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/* A version number must be 0 or 1 */
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if (buffer[4] != 0 && buffer[4] != 1)
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return (0);
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bits_checked += 8;
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/* Dictionary size. */
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log2dic = buffer[5] & 0x1f;
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if (log2dic < 12 || log2dic > 27)
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return (0);
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bits_checked += 8;
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return (bits_checked);
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}
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static int
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lzip_bidder_bid(struct archive_read_filter_bidder *self,
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struct archive_read_filter *filter)
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{
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(void)self; /* UNUSED */
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return (lzip_has_member(filter));
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}
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#if HAVE_LZMA_H && HAVE_LIBLZMA
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/*
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* liblzma 4.999.7 and later support both lzma and xz streams.
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*/
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static int
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xz_bidder_init(struct archive_read_filter *self)
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{
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self->code = ARCHIVE_FILTER_XZ;
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self->name = "xz";
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return (xz_lzma_bidder_init(self));
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}
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static int
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lzma_bidder_init(struct archive_read_filter *self)
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{
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self->code = ARCHIVE_FILTER_LZMA;
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self->name = "lzma";
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return (xz_lzma_bidder_init(self));
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}
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static int
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lzip_bidder_init(struct archive_read_filter *self)
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{
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self->code = ARCHIVE_FILTER_LZIP;
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self->name = "lzip";
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return (xz_lzma_bidder_init(self));
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}
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/*
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* Set an error code and choose an error message
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*/
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static void
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set_error(struct archive_read_filter *self, int ret)
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{
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switch (ret) {
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case LZMA_STREAM_END: /* Found end of stream. */
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case LZMA_OK: /* Decompressor made some progress. */
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break;
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case LZMA_MEM_ERROR:
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archive_set_error(&self->archive->archive, ENOMEM,
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"Lzma library error: Cannot allocate memory");
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break;
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case LZMA_MEMLIMIT_ERROR:
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archive_set_error(&self->archive->archive, ENOMEM,
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"Lzma library error: Out of memory");
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break;
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case LZMA_FORMAT_ERROR:
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archive_set_error(&self->archive->archive,
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ARCHIVE_ERRNO_MISC,
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"Lzma library error: format not recognized");
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break;
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case LZMA_OPTIONS_ERROR:
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archive_set_error(&self->archive->archive,
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ARCHIVE_ERRNO_MISC,
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"Lzma library error: Invalid options");
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break;
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case LZMA_DATA_ERROR:
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archive_set_error(&self->archive->archive,
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ARCHIVE_ERRNO_MISC,
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"Lzma library error: Corrupted input data");
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break;
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case LZMA_BUF_ERROR:
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archive_set_error(&self->archive->archive,
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ARCHIVE_ERRNO_MISC,
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"Lzma library error: No progress is possible");
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break;
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default:
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/* Return an error. */
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archive_set_error(&self->archive->archive,
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ARCHIVE_ERRNO_MISC,
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"Lzma decompression failed: Unknown error");
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break;
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}
|
|
}
|
|
|
|
/*
|
|
* Setup the callbacks.
|
|
*/
|
|
static int
|
|
xz_lzma_bidder_init(struct archive_read_filter *self)
|
|
{
|
|
static const size_t out_block_size = 64 * 1024;
|
|
void *out_block;
|
|
struct private_data *state;
|
|
int ret;
|
|
|
|
state = (struct private_data *)calloc(sizeof(*state), 1);
|
|
out_block = (unsigned char *)malloc(out_block_size);
|
|
if (state == NULL || out_block == NULL) {
|
|
archive_set_error(&self->archive->archive, ENOMEM,
|
|
"Can't allocate data for xz decompression");
|
|
free(out_block);
|
|
free(state);
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
|
|
self->data = state;
|
|
state->out_block_size = out_block_size;
|
|
state->out_block = out_block;
|
|
self->read = xz_filter_read;
|
|
self->skip = NULL; /* not supported */
|
|
self->close = xz_filter_close;
|
|
|
|
state->stream.avail_in = 0;
|
|
|
|
state->stream.next_out = state->out_block;
|
|
state->stream.avail_out = state->out_block_size;
|
|
|
|
state->crc32 = 0;
|
|
if (self->code == ARCHIVE_FILTER_LZIP) {
|
|
/*
|
|
* We have to read a lzip header and use it to initialize
|
|
* compression library, thus we cannot initialize the
|
|
* library for lzip here.
|
|
*/
|
|
state->in_stream = 0;
|
|
return (ARCHIVE_OK);
|
|
} else
|
|
state->in_stream = 1;
|
|
|
|
/* Initialize compression library. */
|
|
if (self->code == ARCHIVE_FILTER_XZ)
|
|
ret = lzma_stream_decoder(&(state->stream),
|
|
LZMA_MEMLIMIT,/* memlimit */
|
|
LZMA_CONCATENATED);
|
|
else
|
|
ret = lzma_alone_decoder(&(state->stream),
|
|
LZMA_MEMLIMIT);/* memlimit */
|
|
|
|
if (ret == LZMA_OK)
|
|
return (ARCHIVE_OK);
|
|
|
|
/* Library setup failed: Choose an error message and clean up. */
|
|
set_error(self, ret);
|
|
|
|
free(state->out_block);
|
|
free(state);
|
|
self->data = NULL;
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
|
|
static int
|
|
lzip_init(struct archive_read_filter *self)
|
|
{
|
|
struct private_data *state;
|
|
const unsigned char *h;
|
|
lzma_filter filters[2];
|
|
unsigned char props[5];
|
|
ssize_t avail_in;
|
|
uint32_t dicsize;
|
|
int log2dic, ret;
|
|
|
|
state = (struct private_data *)self->data;
|
|
h = __archive_read_filter_ahead(self->upstream, 6, &avail_in);
|
|
if (h == NULL)
|
|
return (ARCHIVE_FATAL);
|
|
|
|
/* Get a version number. */
|
|
state->lzip_ver = h[4];
|
|
|
|
/*
|
|
* Setup lzma property.
|
|
*/
|
|
props[0] = 0x5d;
|
|
|
|
/* Get dictionary size. */
|
|
log2dic = h[5] & 0x1f;
|
|
if (log2dic < 12 || log2dic > 27)
|
|
return (ARCHIVE_FATAL);
|
|
dicsize = 1U << log2dic;
|
|
if (log2dic > 12)
|
|
dicsize -= (dicsize / 16) * (h[5] >> 5);
|
|
archive_le32enc(props+1, dicsize);
|
|
|
|
/* Consume lzip header. */
|
|
__archive_read_filter_consume(self->upstream, 6);
|
|
state->member_in = 6;
|
|
|
|
filters[0].id = LZMA_FILTER_LZMA1;
|
|
filters[0].options = NULL;
|
|
filters[1].id = LZMA_VLI_UNKNOWN;
|
|
filters[1].options = NULL;
|
|
|
|
ret = lzma_properties_decode(&filters[0], NULL, props, sizeof(props));
|
|
if (ret != LZMA_OK) {
|
|
set_error(self, ret);
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
ret = lzma_raw_decoder(&(state->stream), filters);
|
|
#if LZMA_VERSION < 50010000
|
|
free(filters[0].options);
|
|
#endif
|
|
if (ret != LZMA_OK) {
|
|
set_error(self, ret);
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
static int
|
|
lzip_tail(struct archive_read_filter *self)
|
|
{
|
|
struct private_data *state;
|
|
const unsigned char *f;
|
|
ssize_t avail_in;
|
|
int tail;
|
|
|
|
state = (struct private_data *)self->data;
|
|
if (state->lzip_ver == 0)
|
|
tail = 12;
|
|
else
|
|
tail = 20;
|
|
f = __archive_read_filter_ahead(self->upstream, tail, &avail_in);
|
|
if (f == NULL && avail_in < 0)
|
|
return (ARCHIVE_FATAL);
|
|
if (f == NULL || avail_in < tail) {
|
|
archive_set_error(&self->archive->archive, ARCHIVE_ERRNO_MISC,
|
|
"Lzip: Remaining data is less bytes");
|
|
return (ARCHIVE_FAILED);
|
|
}
|
|
|
|
/* Check the crc32 value of the uncompressed data of the current
|
|
* member */
|
|
if (state->crc32 != archive_le32dec(f)) {
|
|
archive_set_error(&self->archive->archive, ARCHIVE_ERRNO_MISC,
|
|
"Lzip: CRC32 error");
|
|
return (ARCHIVE_FAILED);
|
|
}
|
|
|
|
/* Check the uncompressed size of the current member */
|
|
if ((uint64_t)state->member_out != archive_le64dec(f + 4)) {
|
|
archive_set_error(&self->archive->archive, ARCHIVE_ERRNO_MISC,
|
|
"Lzip: Uncompressed size error");
|
|
return (ARCHIVE_FAILED);
|
|
}
|
|
|
|
/* Check the total size of the current member */
|
|
if (state->lzip_ver == 1 &&
|
|
(uint64_t)state->member_in + tail != archive_le64dec(f + 12)) {
|
|
archive_set_error(&self->archive->archive, ARCHIVE_ERRNO_MISC,
|
|
"Lzip: Member size error");
|
|
return (ARCHIVE_FAILED);
|
|
}
|
|
__archive_read_filter_consume(self->upstream, tail);
|
|
|
|
/* If current lzip data consists of multi member, try decompressing
|
|
* a next member. */
|
|
if (lzip_has_member(self->upstream) != 0) {
|
|
state->in_stream = 0;
|
|
state->crc32 = 0;
|
|
state->member_out = 0;
|
|
state->member_in = 0;
|
|
state->eof = 0;
|
|
}
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
/*
|
|
* Return the next block of decompressed data.
|
|
*/
|
|
static ssize_t
|
|
xz_filter_read(struct archive_read_filter *self, const void **p)
|
|
{
|
|
struct private_data *state;
|
|
size_t decompressed;
|
|
ssize_t avail_in;
|
|
int ret;
|
|
|
|
state = (struct private_data *)self->data;
|
|
|
|
/* Empty our output buffer. */
|
|
state->stream.next_out = state->out_block;
|
|
state->stream.avail_out = state->out_block_size;
|
|
|
|
/* Try to fill the output buffer. */
|
|
while (state->stream.avail_out > 0 && !state->eof) {
|
|
if (!state->in_stream) {
|
|
/*
|
|
* Initialize liblzma for lzip
|
|
*/
|
|
ret = lzip_init(self);
|
|
if (ret != ARCHIVE_OK)
|
|
return (ret);
|
|
state->in_stream = 1;
|
|
}
|
|
state->stream.next_in =
|
|
__archive_read_filter_ahead(self->upstream, 1, &avail_in);
|
|
if (state->stream.next_in == NULL && avail_in < 0) {
|
|
archive_set_error(&self->archive->archive,
|
|
ARCHIVE_ERRNO_MISC,
|
|
"truncated input");
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
state->stream.avail_in = avail_in;
|
|
|
|
/* Decompress as much as we can in one pass. */
|
|
ret = lzma_code(&(state->stream),
|
|
(state->stream.avail_in == 0)? LZMA_FINISH: LZMA_RUN);
|
|
switch (ret) {
|
|
case LZMA_STREAM_END: /* Found end of stream. */
|
|
state->eof = 1;
|
|
/* FALL THROUGH */
|
|
case LZMA_OK: /* Decompressor made some progress. */
|
|
__archive_read_filter_consume(self->upstream,
|
|
avail_in - state->stream.avail_in);
|
|
state->member_in +=
|
|
avail_in - state->stream.avail_in;
|
|
break;
|
|
default:
|
|
set_error(self, ret);
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
}
|
|
|
|
decompressed = state->stream.next_out - state->out_block;
|
|
state->total_out += decompressed;
|
|
state->member_out += decompressed;
|
|
if (decompressed == 0)
|
|
*p = NULL;
|
|
else {
|
|
*p = state->out_block;
|
|
if (self->code == ARCHIVE_FILTER_LZIP) {
|
|
state->crc32 = lzma_crc32(state->out_block,
|
|
decompressed, state->crc32);
|
|
if (state->eof) {
|
|
ret = lzip_tail(self);
|
|
if (ret != ARCHIVE_OK)
|
|
return (ret);
|
|
}
|
|
}
|
|
}
|
|
return (decompressed);
|
|
}
|
|
|
|
/*
|
|
* Clean up the decompressor.
|
|
*/
|
|
static int
|
|
xz_filter_close(struct archive_read_filter *self)
|
|
{
|
|
struct private_data *state;
|
|
|
|
state = (struct private_data *)self->data;
|
|
lzma_end(&(state->stream));
|
|
free(state->out_block);
|
|
free(state);
|
|
return (ARCHIVE_OK);
|
|
}
|
|
|
|
#else
|
|
|
|
#if HAVE_LZMADEC_H && HAVE_LIBLZMADEC
|
|
|
|
/*
|
|
* If we have the older liblzmadec library, then we can handle
|
|
* LZMA streams but not XZ streams.
|
|
*/
|
|
|
|
/*
|
|
* Setup the callbacks.
|
|
*/
|
|
static int
|
|
lzma_bidder_init(struct archive_read_filter *self)
|
|
{
|
|
static const size_t out_block_size = 64 * 1024;
|
|
void *out_block;
|
|
struct private_data *state;
|
|
ssize_t ret, avail_in;
|
|
|
|
self->code = ARCHIVE_FILTER_LZMA;
|
|
self->name = "lzma";
|
|
|
|
state = (struct private_data *)calloc(sizeof(*state), 1);
|
|
out_block = (unsigned char *)malloc(out_block_size);
|
|
if (state == NULL || out_block == NULL) {
|
|
archive_set_error(&self->archive->archive, ENOMEM,
|
|
"Can't allocate data for lzma decompression");
|
|
free(out_block);
|
|
free(state);
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
|
|
self->data = state;
|
|
state->out_block_size = out_block_size;
|
|
state->out_block = out_block;
|
|
self->read = lzma_filter_read;
|
|
self->skip = NULL; /* not supported */
|
|
self->close = lzma_filter_close;
|
|
|
|
/* Prime the lzma library with 18 bytes of input. */
|
|
state->stream.next_in = (unsigned char *)(uintptr_t)
|
|
__archive_read_filter_ahead(self->upstream, 18, &avail_in);
|
|
if (state->stream.next_in == NULL)
|
|
return (ARCHIVE_FATAL);
|
|
state->stream.avail_in = avail_in;
|
|
state->stream.next_out = state->out_block;
|
|
state->stream.avail_out = state->out_block_size;
|
|
|
|
/* Initialize compression library. */
|
|
ret = lzmadec_init(&(state->stream));
|
|
__archive_read_filter_consume(self->upstream,
|
|
avail_in - state->stream.avail_in);
|
|
if (ret == LZMADEC_OK)
|
|
return (ARCHIVE_OK);
|
|
|
|
/* Library setup failed: Clean up. */
|
|
archive_set_error(&self->archive->archive, ARCHIVE_ERRNO_MISC,
|
|
"Internal error initializing lzma library");
|
|
|
|
/* Override the error message if we know what really went wrong. */
|
|
switch (ret) {
|
|
case LZMADEC_HEADER_ERROR:
|
|
archive_set_error(&self->archive->archive,
|
|
ARCHIVE_ERRNO_MISC,
|
|
"Internal error initializing compression library: "
|
|
"invalid header");
|
|
break;
|
|
case LZMADEC_MEM_ERROR:
|
|
archive_set_error(&self->archive->archive, ENOMEM,
|
|
"Internal error initializing compression library: "
|
|
"out of memory");
|
|
break;
|
|
}
|
|
|
|
free(state->out_block);
|
|
free(state);
|
|
self->data = NULL;
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
|
|
/*
|
|
* Return the next block of decompressed data.
|
|
*/
|
|
static ssize_t
|
|
lzma_filter_read(struct archive_read_filter *self, const void **p)
|
|
{
|
|
struct private_data *state;
|
|
size_t decompressed;
|
|
ssize_t avail_in, ret;
|
|
|
|
state = (struct private_data *)self->data;
|
|
|
|
/* Empty our output buffer. */
|
|
state->stream.next_out = state->out_block;
|
|
state->stream.avail_out = state->out_block_size;
|
|
|
|
/* Try to fill the output buffer. */
|
|
while (state->stream.avail_out > 0 && !state->eof) {
|
|
state->stream.next_in = (unsigned char *)(uintptr_t)
|
|
__archive_read_filter_ahead(self->upstream, 1, &avail_in);
|
|
if (state->stream.next_in == NULL && avail_in < 0) {
|
|
archive_set_error(&self->archive->archive,
|
|
ARCHIVE_ERRNO_MISC,
|
|
"truncated lzma input");
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
state->stream.avail_in = avail_in;
|
|
|
|
/* Decompress as much as we can in one pass. */
|
|
ret = lzmadec_decode(&(state->stream), avail_in == 0);
|
|
switch (ret) {
|
|
case LZMADEC_STREAM_END: /* Found end of stream. */
|
|
state->eof = 1;
|
|
/* FALL THROUGH */
|
|
case LZMADEC_OK: /* Decompressor made some progress. */
|
|
__archive_read_filter_consume(self->upstream,
|
|
avail_in - state->stream.avail_in);
|
|
break;
|
|
case LZMADEC_BUF_ERROR: /* Insufficient input data? */
|
|
archive_set_error(&self->archive->archive,
|
|
ARCHIVE_ERRNO_MISC,
|
|
"Insufficient compressed data");
|
|
return (ARCHIVE_FATAL);
|
|
default:
|
|
/* Return an error. */
|
|
archive_set_error(&self->archive->archive,
|
|
ARCHIVE_ERRNO_MISC,
|
|
"Lzma decompression failed");
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
}
|
|
|
|
decompressed = state->stream.next_out - state->out_block;
|
|
state->total_out += decompressed;
|
|
if (decompressed == 0)
|
|
*p = NULL;
|
|
else
|
|
*p = state->out_block;
|
|
return (decompressed);
|
|
}
|
|
|
|
/*
|
|
* Clean up the decompressor.
|
|
*/
|
|
static int
|
|
lzma_filter_close(struct archive_read_filter *self)
|
|
{
|
|
struct private_data *state;
|
|
int ret;
|
|
|
|
state = (struct private_data *)self->data;
|
|
ret = ARCHIVE_OK;
|
|
switch (lzmadec_end(&(state->stream))) {
|
|
case LZMADEC_OK:
|
|
break;
|
|
default:
|
|
archive_set_error(&(self->archive->archive),
|
|
ARCHIVE_ERRNO_MISC,
|
|
"Failed to clean up %s compressor",
|
|
self->archive->archive.compression_name);
|
|
ret = ARCHIVE_FATAL;
|
|
}
|
|
|
|
free(state->out_block);
|
|
free(state);
|
|
return (ret);
|
|
}
|
|
|
|
#else
|
|
|
|
/*
|
|
*
|
|
* If we have no suitable library on this system, we can't actually do
|
|
* the decompression. We can, however, still detect compressed
|
|
* archives and emit a useful message.
|
|
*
|
|
*/
|
|
static int
|
|
lzma_bidder_init(struct archive_read_filter *self)
|
|
{
|
|
int r;
|
|
|
|
r = __archive_read_program(self, "lzma -d -qq");
|
|
/* Note: We set the format here even if __archive_read_program()
|
|
* above fails. We do, after all, know what the format is
|
|
* even if we weren't able to read it. */
|
|
self->code = ARCHIVE_FILTER_LZMA;
|
|
self->name = "lzma";
|
|
return (r);
|
|
}
|
|
|
|
#endif /* HAVE_LZMADEC_H */
|
|
|
|
|
|
static int
|
|
xz_bidder_init(struct archive_read_filter *self)
|
|
{
|
|
int r;
|
|
|
|
r = __archive_read_program(self, "xz -d -qq");
|
|
/* Note: We set the format here even if __archive_read_program()
|
|
* above fails. We do, after all, know what the format is
|
|
* even if we weren't able to read it. */
|
|
self->code = ARCHIVE_FILTER_XZ;
|
|
self->name = "xz";
|
|
return (r);
|
|
}
|
|
|
|
static int
|
|
lzip_bidder_init(struct archive_read_filter *self)
|
|
{
|
|
int r;
|
|
|
|
r = __archive_read_program(self, "lzip -d -q");
|
|
/* Note: We set the format here even if __archive_read_program()
|
|
* above fails. We do, after all, know what the format is
|
|
* even if we weren't able to read it. */
|
|
self->code = ARCHIVE_FILTER_LZIP;
|
|
self->name = "lzip";
|
|
return (r);
|
|
}
|
|
|
|
|
|
#endif /* HAVE_LZMA_H */
|