645 lines
19 KiB
C
645 lines
19 KiB
C
/*-
|
|
* Copyright (c) 2009 Michihiro NAKAJIMA
|
|
* Copyright (c) 2003-2008 Tim Kientzle and Miklos Vajna
|
|
* 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.
|
|
* 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.
|
|
*/
|
|
|
|
#include "archive_platform.h"
|
|
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
#ifdef HAVE_ERRNO_H
|
|
#include <errno.h>
|
|
#endif
|
|
#include <stdio.h>
|
|
#ifdef HAVE_STDLIB_H
|
|
#include <stdlib.h>
|
|
#endif
|
|
#ifdef HAVE_STRING_H
|
|
#include <string.h>
|
|
#endif
|
|
#ifdef HAVE_UNISTD_H
|
|
#include <unistd.h>
|
|
#endif
|
|
#if HAVE_LZMA_H
|
|
#include <lzma.h>
|
|
#elif HAVE_LZMADEC_H
|
|
#include <lzmadec.h>
|
|
#endif
|
|
|
|
#include "archive.h"
|
|
#include "archive_private.h"
|
|
#include "archive_read_private.h"
|
|
|
|
#if HAVE_LZMA_H && HAVE_LIBLZMA
|
|
|
|
struct private_data {
|
|
lzma_stream stream;
|
|
unsigned char *out_block;
|
|
size_t out_block_size;
|
|
int64_t total_out;
|
|
char eof; /* True = found end of compressed data. */
|
|
};
|
|
|
|
/* Combined lzma/xz filter */
|
|
static ssize_t xz_filter_read(struct archive_read_filter *, const void **);
|
|
static int xz_filter_close(struct archive_read_filter *);
|
|
static int xz_lzma_bidder_init(struct archive_read_filter *);
|
|
|
|
#elif HAVE_LZMADEC_H && HAVE_LIBLZMADEC
|
|
|
|
struct private_data {
|
|
lzmadec_stream stream;
|
|
unsigned char *out_block;
|
|
size_t out_block_size;
|
|
int64_t total_out;
|
|
char eof; /* True = found end of compressed data. */
|
|
};
|
|
|
|
/* Lzma-only filter */
|
|
static ssize_t lzma_filter_read(struct archive_read_filter *, const void **);
|
|
static int lzma_filter_close(struct archive_read_filter *);
|
|
#endif
|
|
|
|
/*
|
|
* Note that we can detect xz and lzma compressed files even if we
|
|
* can't decompress them. (In fact, we like detecting them because we
|
|
* can give better error messages.) So the bid framework here gets
|
|
* compiled even if no lzma library is available.
|
|
*/
|
|
static int xz_bidder_bid(struct archive_read_filter_bidder *,
|
|
struct archive_read_filter *);
|
|
static int xz_bidder_init(struct archive_read_filter *);
|
|
static int lzma_bidder_bid(struct archive_read_filter_bidder *,
|
|
struct archive_read_filter *);
|
|
static int lzma_bidder_init(struct archive_read_filter *);
|
|
|
|
int
|
|
archive_read_support_compression_xz(struct archive *_a)
|
|
{
|
|
struct archive_read *a = (struct archive_read *)_a;
|
|
struct archive_read_filter_bidder *bidder = __archive_read_get_bidder(a);
|
|
|
|
archive_clear_error(_a);
|
|
if (bidder == NULL)
|
|
return (ARCHIVE_FATAL);
|
|
|
|
bidder->data = NULL;
|
|
bidder->bid = xz_bidder_bid;
|
|
bidder->init = xz_bidder_init;
|
|
bidder->options = NULL;
|
|
bidder->free = NULL;
|
|
#if HAVE_LZMA_H && HAVE_LIBLZMA
|
|
return (ARCHIVE_OK);
|
|
#else
|
|
archive_set_error(_a, ARCHIVE_ERRNO_MISC,
|
|
"Using external unxz program for xz decompression");
|
|
return (ARCHIVE_WARN);
|
|
#endif
|
|
}
|
|
|
|
int
|
|
archive_read_support_compression_lzma(struct archive *_a)
|
|
{
|
|
struct archive_read *a = (struct archive_read *)_a;
|
|
struct archive_read_filter_bidder *bidder = __archive_read_get_bidder(a);
|
|
|
|
archive_clear_error(_a);
|
|
if (bidder == NULL)
|
|
return (ARCHIVE_FATAL);
|
|
|
|
bidder->data = NULL;
|
|
bidder->bid = lzma_bidder_bid;
|
|
bidder->init = lzma_bidder_init;
|
|
bidder->options = NULL;
|
|
bidder->free = NULL;
|
|
#if HAVE_LZMA_H && HAVE_LIBLZMA
|
|
return (ARCHIVE_OK);
|
|
#elif HAVE_LZMADEC_H && HAVE_LIBLZMADEC
|
|
return (ARCHIVE_OK);
|
|
#else
|
|
archive_set_error(_a, ARCHIVE_ERRNO_MISC,
|
|
"Using external unlzma program for lzma decompression");
|
|
return (ARCHIVE_WARN);
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* Test whether we can handle this data.
|
|
*/
|
|
static int
|
|
xz_bidder_bid(struct archive_read_filter_bidder *self,
|
|
struct archive_read_filter *filter)
|
|
{
|
|
const unsigned char *buffer;
|
|
ssize_t avail;
|
|
int bits_checked;
|
|
|
|
(void)self; /* UNUSED */
|
|
|
|
buffer = __archive_read_filter_ahead(filter, 6, &avail);
|
|
if (buffer == NULL)
|
|
return (0);
|
|
|
|
/*
|
|
* Verify Header Magic Bytes : FD 37 7A 58 5A 00
|
|
*/
|
|
bits_checked = 0;
|
|
if (buffer[0] != 0xFD)
|
|
return (0);
|
|
bits_checked += 8;
|
|
if (buffer[1] != 0x37)
|
|
return (0);
|
|
bits_checked += 8;
|
|
if (buffer[2] != 0x7A)
|
|
return (0);
|
|
bits_checked += 8;
|
|
if (buffer[3] != 0x58)
|
|
return (0);
|
|
bits_checked += 8;
|
|
if (buffer[4] != 0x5A)
|
|
return (0);
|
|
bits_checked += 8;
|
|
if (buffer[5] != 0x00)
|
|
return (0);
|
|
bits_checked += 8;
|
|
|
|
return (bits_checked);
|
|
}
|
|
|
|
/*
|
|
* Test whether we can handle this data.
|
|
*
|
|
* <sigh> LZMA has a rather poor file signature. Zeros do not
|
|
* make good signature bytes as a rule, and the only non-zero byte
|
|
* here is an ASCII character. For example, an uncompressed tar
|
|
* archive whose first file is ']' would satisfy this check. It may
|
|
* be necessary to exclude LZMA from compression_all() because of
|
|
* this. Clients of libarchive would then have to explicitly enable
|
|
* LZMA checking instead of (or in addition to) compression_all() when
|
|
* they have other evidence (file name, command-line option) to go on.
|
|
*/
|
|
static int
|
|
lzma_bidder_bid(struct archive_read_filter_bidder *self,
|
|
struct archive_read_filter *filter)
|
|
{
|
|
const unsigned char *buffer;
|
|
ssize_t avail;
|
|
int bits_checked;
|
|
|
|
(void)self; /* UNUSED */
|
|
|
|
buffer = __archive_read_filter_ahead(filter, 6, &avail);
|
|
if (buffer == NULL)
|
|
return (0);
|
|
|
|
/* First byte of raw LZMA stream is always 0x5d. */
|
|
bits_checked = 0;
|
|
if (buffer[0] != 0x5d)
|
|
return (0);
|
|
bits_checked += 8;
|
|
|
|
/* Second through fifth bytes are dictionary code, stored in
|
|
* little-endian order. The two least-significant bytes are
|
|
* always zero. */
|
|
if (buffer[1] != 0 || buffer[2] != 0)
|
|
return (0);
|
|
bits_checked += 16;
|
|
|
|
/* ??? TODO: Fix this. ??? */
|
|
/* NSIS format check uses this, but I've seen tar.lzma
|
|
* archives where this byte is 0xff, not 0. Can it
|
|
* ever be anything other than 0 or 0xff?
|
|
*/
|
|
#if 0
|
|
if (buffer[5] != 0)
|
|
return (0);
|
|
bits_checked += 8;
|
|
#endif
|
|
|
|
/* TODO: The above test is still very weak. It would be
|
|
* good to do better. */
|
|
|
|
return (bits_checked);
|
|
}
|
|
|
|
#if HAVE_LZMA_H && HAVE_LIBLZMA
|
|
|
|
/*
|
|
* liblzma 4.999.7 and later support both lzma and xz streams.
|
|
*/
|
|
static int
|
|
xz_bidder_init(struct archive_read_filter *self)
|
|
{
|
|
self->code = ARCHIVE_COMPRESSION_XZ;
|
|
self->name = "xz";
|
|
return (xz_lzma_bidder_init(self));
|
|
}
|
|
|
|
static int
|
|
lzma_bidder_init(struct archive_read_filter *self)
|
|
{
|
|
self->code = ARCHIVE_COMPRESSION_LZMA;
|
|
self->name = "lzma";
|
|
return (xz_lzma_bidder_init(self));
|
|
}
|
|
|
|
/*
|
|
* 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;
|
|
|
|
/* Initialize compression library.
|
|
* TODO: I don't know what value is best for memlimit.
|
|
* maybe, it needs to check memory size which
|
|
* running system has.
|
|
*/
|
|
if (self->code == ARCHIVE_COMPRESSION_XZ)
|
|
ret = lzma_stream_decoder(&(state->stream),
|
|
(1U << 30),/* memlimit */
|
|
LZMA_CONCATENATED);
|
|
else
|
|
ret = lzma_alone_decoder(&(state->stream),
|
|
(1U << 30));/* memlimit */
|
|
|
|
if (ret == LZMA_OK)
|
|
return (ARCHIVE_OK);
|
|
|
|
/* Library setup failed: Choose an error message and clean up. */
|
|
switch (ret) {
|
|
case LZMA_MEM_ERROR:
|
|
archive_set_error(&self->archive->archive, ENOMEM,
|
|
"Internal error initializing compression library: "
|
|
"Cannot allocate memory");
|
|
break;
|
|
case LZMA_OPTIONS_ERROR:
|
|
archive_set_error(&self->archive->archive,
|
|
ARCHIVE_ERRNO_MISC,
|
|
"Internal error initializing compression library: "
|
|
"Invalid or unsupported options");
|
|
break;
|
|
default:
|
|
archive_set_error(&self->archive->archive, ARCHIVE_ERRNO_MISC,
|
|
"Internal error initializing lzma library");
|
|
break;
|
|
}
|
|
|
|
free(state->out_block);
|
|
free(state);
|
|
self->data = NULL;
|
|
return (ARCHIVE_FATAL);
|
|
}
|
|
|
|
/*
|
|
* 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) {
|
|
state->stream.next_in =
|
|
__archive_read_filter_ahead(self->upstream, 1, &avail_in);
|
|
if (state->stream.next_in == NULL && avail_in < 0)
|
|
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);
|
|
break;
|
|
case LZMA_MEM_ERROR:
|
|
archive_set_error(&self->archive->archive, ENOMEM,
|
|
"Lzma library error: Cannot allocate memory");
|
|
return (ARCHIVE_FATAL);
|
|
case LZMA_MEMLIMIT_ERROR:
|
|
archive_set_error(&self->archive->archive, ENOMEM,
|
|
"Lzma library error: Out of memory");
|
|
return (ARCHIVE_FATAL);
|
|
case LZMA_FORMAT_ERROR:
|
|
archive_set_error(&self->archive->archive,
|
|
ARCHIVE_ERRNO_MISC,
|
|
"Lzma library error: format not recognized");
|
|
return (ARCHIVE_FATAL);
|
|
case LZMA_OPTIONS_ERROR:
|
|
archive_set_error(&self->archive->archive,
|
|
ARCHIVE_ERRNO_MISC,
|
|
"Lzma library error: Invalid options");
|
|
return (ARCHIVE_FATAL);
|
|
case LZMA_DATA_ERROR:
|
|
archive_set_error(&self->archive->archive,
|
|
ARCHIVE_ERRNO_MISC,
|
|
"Lzma library error: Corrupted input data");
|
|
return (ARCHIVE_FATAL);
|
|
case LZMA_BUF_ERROR:
|
|
archive_set_error(&self->archive->archive,
|
|
ARCHIVE_ERRNO_MISC,
|
|
"Lzma library error: No progress is possible");
|
|
return (ARCHIVE_FATAL);
|
|
default:
|
|
/* Return an error. */
|
|
archive_set_error(&self->archive->archive,
|
|
ARCHIVE_ERRNO_MISC,
|
|
"Lzma decompression failed: Unknown error");
|
|
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
|
|
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_COMPRESSION_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)
|
|
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, "unlzma");
|
|
/* 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_COMPRESSION_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, "unxz");
|
|
/* 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_COMPRESSION_XZ;
|
|
self->name = "xz";
|
|
return (r);
|
|
}
|
|
|
|
|
|
#endif /* HAVE_LZMA_H */
|