archive_read_extract2.c revision 302408 
1/*-
2 * Copyright (c) 2003-2007 Tim Kientzle
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#include "archive_platform.h"
27__FBSDID("$FreeBSD: stable/11/contrib/libarchive/libarchive/archive_read_extract2.c 299529 2016-05-12 10:16:16Z mm $");
28
29#ifdef HAVE_SYS_TYPES_H
30#include <sys/types.h>
31#endif
32#ifdef HAVE_ERRNO_H
33#include <errno.h>
34#endif
35#ifdef HAVE_STRING_H
36#include <string.h>
37#endif
38
39#include "archive.h"
40#include "archive_entry.h"
41#include "archive_private.h"
42#include "archive_read_private.h"
43
44static int	copy_data(struct archive *ar, struct archive *aw);
45static int	archive_read_extract_cleanup(struct archive_read *);
46
47
48/* Retrieve an extract object without initialising the associated
49 * archive_write_disk object.
50 */
51struct archive_read_extract *
52__archive_read_get_extract(struct archive_read *a)
53{
54	if (a->extract == NULL) {
55		a->extract = (struct archive_read_extract *)malloc(sizeof(*a->extract));
56		if (a->extract == NULL) {
57			archive_set_error(&a->archive, ENOMEM, "Can't extract");
58			return (NULL);
59		}
60		memset(a->extract, 0, sizeof(*a->extract));
61		a->cleanup_archive_extract = archive_read_extract_cleanup;
62	}
63	return (a->extract);
64}
65
66/*
67 * Cleanup function for archive_extract.
68 */
69static int
70archive_read_extract_cleanup(struct archive_read *a)
71{
72	int ret = ARCHIVE_OK;
73
74	if (a->extract->ad != NULL) {
75		ret = archive_write_free(a->extract->ad);
76	}
77	free(a->extract);
78	a->extract = NULL;
79	return (ret);
80}
81
82int
83archive_read_extract2(struct archive *_a, struct archive_entry *entry,
84    struct archive *ad)
85{
86	struct archive_read *a = (struct archive_read *)_a;
87	int r, r2;
88
89	/* Set up for this particular entry. */
90	if (a->skip_file_set)
91		archive_write_disk_set_skip_file(ad,
92		    a->skip_file_dev, a->skip_file_ino);
93	r = archive_write_header(ad, entry);
94	if (r < ARCHIVE_WARN)
95		r = ARCHIVE_WARN;
96	if (r != ARCHIVE_OK)
97		/* If _write_header failed, copy the error. */
98 		archive_copy_error(&a->archive, ad);
99	else if (!archive_entry_size_is_set(entry) || archive_entry_size(entry) > 0)
100		/* Otherwise, pour data into the entry. */
101		r = copy_data(_a, ad);
102	r2 = archive_write_finish_entry(ad);
103	if (r2 < ARCHIVE_WARN)
104		r2 = ARCHIVE_WARN;
105	/* Use the first message. */
106	if (r2 != ARCHIVE_OK && r == ARCHIVE_OK)
107		archive_copy_error(&a->archive, ad);
108	/* Use the worst error return. */
109	if (r2 < r)
110		r = r2;
111	return (r);
112}
113
114void
115archive_read_extract_set_progress_callback(struct archive *_a,
116    void (*progress_func)(void *), void *user_data)
117{
118	struct archive_read *a = (struct archive_read *)_a;
119	struct archive_read_extract *extract = __archive_read_get_extract(a);
120	if (extract != NULL) {
121		extract->extract_progress = progress_func;
122		extract->extract_progress_user_data = user_data;
123	}
124}
125
126static int
127copy_data(struct archive *ar, struct archive *aw)
128{
129	int64_t offset;
130	const void *buff;
131	struct archive_read_extract *extract;
132	size_t size;
133	int r;
134
135	extract = __archive_read_get_extract((struct archive_read *)ar);
136	if (extract == NULL)
137		return (ARCHIVE_FATAL);
138	for (;;) {
139		r = archive_read_data_block(ar, &buff, &size, &offset);
140		if (r == ARCHIVE_EOF)
141			return (ARCHIVE_OK);
142		if (r != ARCHIVE_OK)
143			return (r);
144		r = (int)archive_write_data_block(aw, buff, size, offset);
145		if (r < ARCHIVE_WARN)
146			r = ARCHIVE_WARN;
147		if (r < ARCHIVE_OK) {
148			archive_set_error(ar, archive_errno(aw),
149			    "%s", archive_error_string(aw));
150			return (r);
151		}
152		if (extract->extract_progress)
153			(extract->extract_progress)
154			    (extract->extract_progress_user_data);
155	}
156}
157