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/*-
* Copyright (c) 2003-2007 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.
* 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: src/lib/libarchive/archive_read_extract.c,v 1.61 2008/05/26 17:00:22 kientzle Exp $");
#ifdef HAVE_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifdef HAVE_ERRNO_H
#include <errno.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include "archive.h"
#include "archive_entry.h"
#include "archive_private.h"
#include "archive_read_private.h"
#include "archive_write_disk_private.h"
struct extract {
struct archive *ad; /* archive_write_disk object */
/* Progress function invoked during extract. */
void (*extract_progress)(void *);
void *extract_progress_user_data;
};
static int archive_read_extract_cleanup(struct archive_read *);
static int copy_data(struct archive *ar, struct archive *aw);
static struct extract *get_extract(struct archive_read *);
static struct extract *
get_extract(struct archive_read *a)
{
/* If we haven't initialized, do it now. */
/* This also sets up a lot of global state. */
if (a->extract == NULL) {
a->extract = (struct extract *)malloc(sizeof(*a->extract));
if (a->extract == NULL) {
archive_set_error(&a->archive, ENOMEM, "Can't extract");
return (NULL);
}
memset(a->extract, 0, sizeof(*a->extract));
a->extract->ad = archive_write_disk_new();
if (a->extract->ad == NULL) {
archive_set_error(&a->archive, ENOMEM, "Can't extract");
return (NULL);
}
archive_write_disk_set_standard_lookup(a->extract->ad);
a->cleanup_archive_extract = archive_read_extract_cleanup;
}
return (a->extract);
}
int
archive_read_extract(struct archive *_a, struct archive_entry *entry, int flags)
{
struct extract *extract;
extract = get_extract((struct archive_read *)_a);
if (extract == NULL)
return (ARCHIVE_FATAL);
archive_write_disk_set_options(extract->ad, flags);
return (archive_read_extract2(_a, entry, extract->ad));
}
int
archive_read_extract2(struct archive *_a, struct archive_entry *entry,
struct archive *ad)
{
struct archive_read *a = (struct archive_read *)_a;
int r, r2;
/* Set up for this particular entry. */
if (a->skip_file_set)
archive_write_disk_set_skip_file(ad,
a->skip_file_dev, a->skip_file_ino);
r = archive_write_header(ad, entry);
if (r < ARCHIVE_WARN)
r = ARCHIVE_WARN;
if (r != ARCHIVE_OK)
/* If _write_header failed, copy the error. */
archive_copy_error(&a->archive, ad);
else if (!archive_entry_size_is_set(entry) || archive_entry_size(entry) > 0)
/* Otherwise, pour data into the entry. */
r = copy_data(_a, ad);
r2 = archive_write_finish_entry(ad);
if (r2 < ARCHIVE_WARN)
r2 = ARCHIVE_WARN;
/* Use the first message. */
if (r2 != ARCHIVE_OK && r == ARCHIVE_OK)
archive_copy_error(&a->archive, ad);
/* Use the worst error return. */
if (r2 < r)
r = r2;
return (r);
}
void
archive_read_extract_set_progress_callback(struct archive *_a,
void (*progress_func)(void *), void *user_data)
{
struct archive_read *a = (struct archive_read *)_a;
struct extract *extract = get_extract(a);
if (extract != NULL) {
extract->extract_progress = progress_func;
extract->extract_progress_user_data = user_data;
}
}
static int
copy_data(struct archive *ar, struct archive *aw)
{
int64_t offset;
const void *buff;
struct extract *extract;
size_t size;
int r;
extract = get_extract((struct archive_read *)ar);
if (extract == NULL)
return (ARCHIVE_FATAL);
for (;;) {
r = archive_read_data_block(ar, &buff, &size, &offset);
if (r == ARCHIVE_EOF)
return (ARCHIVE_OK);
if (r != ARCHIVE_OK)
return (r);
r = (int)archive_write_data_block(aw, buff, size, offset);
if (r < ARCHIVE_WARN)
r = ARCHIVE_WARN;
if (r != ARCHIVE_OK) {
archive_set_error(ar, archive_errno(aw),
"%s", archive_error_string(aw));
return (r);
}
if (extract->extract_progress)
(extract->extract_progress)
(extract->extract_progress_user_data);
}
}
/*
* Cleanup function for archive_extract.
*/
static int
archive_read_extract_cleanup(struct archive_read *a)
{
int ret = ARCHIVE_OK;
ret = archive_write_free(a->extract->ad);
free(a->extract);
a->extract = NULL;
return (ret);
}
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