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