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
28#ifdef HAVE_SYS_TYPES_H
29#include <sys/types.h>
30#endif
31#ifdef HAVE_ERRNO_H
32#include <errno.h>
33#endif
34#ifdef HAVE_STRING_H
35#include <string.h>
36#endif
37
38#include "archive.h"
39#include "archive_entry.h"
40#include "archive_private.h"
41#include "archive_read_private.h"
42
43static int	copy_data(struct archive *ar, struct archive *aw);
44static int	archive_read_extract_cleanup(struct archive_read *);
45
46
47/* Retrieve an extract object without initialising the associated
48 * archive_write_disk object.
49 */
50struct archive_read_extract *
51__archive_read_get_extract(struct archive_read *a)
52{
53	if (a->extract == NULL) {
54		a->extract = (struct archive_read_extract *)calloc(1, sizeof(*a->extract));
55		if (a->extract == NULL) {
56			archive_set_error(&a->archive, ENOMEM, "Can't extract");
57			return (NULL);
58		}
59		a->cleanup_archive_extract = archive_read_extract_cleanup;
60	}
61	return (a->extract);
62}
63
64/*
65 * Cleanup function for archive_extract.
66 */
67static int
68archive_read_extract_cleanup(struct archive_read *a)
69{
70	int ret = ARCHIVE_OK;
71
72	if (a->extract->ad != NULL) {
73		ret = archive_write_free(a->extract->ad);
74	}
75	free(a->extract);
76	a->extract = NULL;
77	return (ret);
78}
79
80int
81archive_read_extract2(struct archive *_a, struct archive_entry *entry,
82    struct archive *ad)
83{
84	struct archive_read *a = (struct archive_read *)_a;
85	int r, r2;
86
87	/* Set up for this particular entry. */
88	if (a->skip_file_set)
89		archive_write_disk_set_skip_file(ad,
90		    a->skip_file_dev, a->skip_file_ino);
91	r = archive_write_header(ad, entry);
92	if (r < ARCHIVE_WARN)
93		r = ARCHIVE_WARN;
94	if (r != ARCHIVE_OK)
95		/* If _write_header failed, copy the error. */
96 		archive_copy_error(&a->archive, ad);
97	else if (!archive_entry_size_is_set(entry) || archive_entry_size(entry) > 0)
98		/* Otherwise, pour data into the entry. */
99		r = copy_data(_a, ad);
100	r2 = archive_write_finish_entry(ad);
101	if (r2 < ARCHIVE_WARN)
102		r2 = ARCHIVE_WARN;
103	/* Use the first message. */
104	if (r2 != ARCHIVE_OK && r == ARCHIVE_OK)
105		archive_copy_error(&a->archive, ad);
106	/* Use the worst error return. */
107	if (r2 < r)
108		r = r2;
109	return (r);
110}
111
112void
113archive_read_extract_set_progress_callback(struct archive *_a,
114    void (*progress_func)(void *), void *user_data)
115{
116	struct archive_read *a = (struct archive_read *)_a;
117	struct archive_read_extract *extract = __archive_read_get_extract(a);
118	if (extract != NULL) {
119		extract->extract_progress = progress_func;
120		extract->extract_progress_user_data = user_data;
121	}
122}
123
124static int
125copy_data(struct archive *ar, struct archive *aw)
126{
127	int64_t offset;
128	const void *buff;
129	struct archive_read_extract *extract;
130	size_t size;
131	int r;
132
133	extract = __archive_read_get_extract((struct archive_read *)ar);
134	if (extract == NULL)
135		return (ARCHIVE_FATAL);
136	for (;;) {
137		r = archive_read_data_block(ar, &buff, &size, &offset);
138		if (r == ARCHIVE_EOF)
139			return (ARCHIVE_OK);
140		if (r != ARCHIVE_OK)
141			return (r);
142		r = (int)archive_write_data_block(aw, buff, size, offset);
143		if (r < ARCHIVE_WARN)
144			r = ARCHIVE_WARN;
145		if (r < ARCHIVE_OK) {
146			archive_set_error(ar, archive_errno(aw),
147			    "%s", archive_error_string(aw));
148			return (r);
149		}
150		if (extract->extract_progress)
151			(extract->extract_progress)
152			    (extract->extract_progress_user_data);
153	}
154}
155