archive_read_extract2.c revision 311041 
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 311041 2017-01-02 01:41:31Z 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 *)calloc(1, sizeof(*a->extract));
56		if (a->extract == NULL) {
57			archive_set_error(&a->archive, ENOMEM, "Can't extract");
58			return (NULL);
59		}
60		a->cleanup_archive_extract = archive_read_extract_cleanup;
61	}
62	return (a->extract);
63}
64
65/*
66 * Cleanup function for archive_extract.
67 */
68static int
69archive_read_extract_cleanup(struct archive_read *a)
70{
71	int ret = ARCHIVE_OK;
72
73	if (a->extract->ad != NULL) {
74		ret = archive_write_free(a->extract->ad);
75	}
76	free(a->extract);
77	a->extract = NULL;
78	return (ret);
79}
80
81int
82archive_read_extract2(struct archive *_a, struct archive_entry *entry,
83    struct archive *ad)
84{
85	struct archive_read *a = (struct archive_read *)_a;
86	int r, r2;
87
88	/* Set up for this particular entry. */
89	if (a->skip_file_set)
90		archive_write_disk_set_skip_file(ad,
91		    a->skip_file_dev, a->skip_file_ino);
92	r = archive_write_header(ad, entry);
93	if (r < ARCHIVE_WARN)
94		r = ARCHIVE_WARN;
95	if (r != ARCHIVE_OK)
96		/* If _write_header failed, copy the error. */
97 		archive_copy_error(&a->archive, ad);
98	else if (!archive_entry_size_is_set(entry) || archive_entry_size(entry) > 0)
99		/* Otherwise, pour data into the entry. */
100		r = copy_data(_a, ad);
101	r2 = archive_write_finish_entry(ad);
102	if (r2 < ARCHIVE_WARN)
103		r2 = ARCHIVE_WARN;
104	/* Use the first message. */
105	if (r2 != ARCHIVE_OK && r == ARCHIVE_OK)
106		archive_copy_error(&a->archive, ad);
107	/* Use the worst error return. */
108	if (r2 < r)
109		r = r2;
110	return (r);
111}
112
113void
114archive_read_extract_set_progress_callback(struct archive *_a,
115    void (*progress_func)(void *), void *user_data)
116{
117	struct archive_read *a = (struct archive_read *)_a;
118	struct archive_read_extract *extract = __archive_read_get_extract(a);
119	if (extract != NULL) {
120		extract->extract_progress = progress_func;
121		extract->extract_progress_user_data = user_data;
122	}
123}
124
125static int
126copy_data(struct archive *ar, struct archive *aw)
127{
128	int64_t offset;
129	const void *buff;
130	struct archive_read_extract *extract;
131	size_t size;
132	int r;
133
134	extract = __archive_read_get_extract((struct archive_read *)ar);
135	if (extract == NULL)
136		return (ARCHIVE_FATAL);
137	for (;;) {
138		r = archive_read_data_block(ar, &buff, &size, &offset);
139		if (r == ARCHIVE_EOF)
140			return (ARCHIVE_OK);
141		if (r != ARCHIVE_OK)
142			return (r);
143		r = (int)archive_write_data_block(aw, buff, size, offset);
144		if (r < ARCHIVE_WARN)
145			r = ARCHIVE_WARN;
146		if (r < ARCHIVE_OK) {
147			archive_set_error(ar, archive_errno(aw),
148			    "%s", archive_error_string(aw));
149			return (r);
150		}
151		if (extract->extract_progress)
152			(extract->extract_progress)
153			    (extract->extract_progress_user_data);
154	}
155}
156