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: src/lib/libarchive/archive_read_extract.c,v 1.61 2008/05/26 17:00:22 kientzle Exp $");
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
44 static int copy_data(struct archive *ar, struct archive *aw);
45 static 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 */
51 struct archive_read_extract *
__archive_read_get_extract(struct archive_read * a)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 */
68 static int
archive_read_extract_cleanup(struct archive_read * a)69 archive_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
81 int
archive_read_extract2(struct archive * _a,struct archive_entry * entry,struct archive * ad)82 archive_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
113 void
archive_read_extract_set_progress_callback(struct archive * _a,void (* progress_func)(void *),void * user_data)114 archive_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
125 static int
copy_data(struct archive * ar,struct archive * aw)126 copy_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