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
43 static int copy_data(struct archive *ar, struct archive *aw);
44 static 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 */
50 struct archive_read_extract *
__archive_read_get_extract(struct archive_read * a)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 */
67 static int
archive_read_extract_cleanup(struct archive_read * a)68 archive_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
80 int
archive_read_extract2(struct archive * _a,struct archive_entry * entry,struct archive * ad)81 archive_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
112 void
archive_read_extract_set_progress_callback(struct archive * _a,void (* progress_func)(void *),void * user_data)113 archive_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
124 static int
copy_data(struct archive * ar,struct archive * aw)125 copy_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