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_STDLIB_H 36 #include <stdlib.h> 37 #endif 38 #ifdef HAVE_STRING_H 39 #include <string.h> 40 #endif 41 42 #include "archive.h" 43 #include "archive_entry.h" 44 #include "archive_private.h" 45 #include "archive_read_private.h" 46 #include "archive_write_disk_private.h" 47 48 struct extract { 49 struct archive *ad; /* archive_write_disk object */ 50 51 /* Progress function invoked during extract. */ 52 void (*extract_progress)(void *); 53 void *extract_progress_user_data; 54 }; 55 56 static int archive_read_extract_cleanup(struct archive_read *); 57 static int copy_data(struct archive *ar, struct archive *aw); 58 static struct extract *get_extract(struct archive_read *); 59 60 static struct extract * 61 get_extract(struct archive_read *a) 62 { 63 /* If we haven't initialized, do it now. */ 64 /* This also sets up a lot of global state. */ 65 if (a->extract == NULL) { 66 a->extract = (struct extract *)malloc(sizeof(*a->extract)); 67 if (a->extract == NULL) { 68 archive_set_error(&a->archive, ENOMEM, "Can't extract"); 69 return (NULL); 70 } 71 memset(a->extract, 0, sizeof(*a->extract)); 72 a->extract->ad = archive_write_disk_new(); 73 if (a->extract->ad == NULL) { 74 archive_set_error(&a->archive, ENOMEM, "Can't extract"); 75 return (NULL); 76 } 77 archive_write_disk_set_standard_lookup(a->extract->ad); 78 a->cleanup_archive_extract = archive_read_extract_cleanup; 79 } 80 return (a->extract); 81 } 82 83 int 84 archive_read_extract(struct archive *_a, struct archive_entry *entry, int flags) 85 { 86 struct extract *extract; 87 88 extract = get_extract((struct archive_read *)_a); 89 if (extract == NULL) 90 return (ARCHIVE_FATAL); 91 archive_write_disk_set_options(extract->ad, flags); 92 return (archive_read_extract2(_a, entry, extract->ad)); 93 } 94 95 int 96 archive_read_extract2(struct archive *_a, struct archive_entry *entry, 97 struct archive *ad) 98 { 99 struct archive_read *a = (struct archive_read *)_a; 100 int r, r2; 101 102 /* Set up for this particular entry. */ 103 if (a->skip_file_set) 104 archive_write_disk_set_skip_file(ad, 105 a->skip_file_dev, a->skip_file_ino); 106 r = archive_write_header(ad, entry); 107 if (r < ARCHIVE_WARN) 108 r = ARCHIVE_WARN; 109 if (r != ARCHIVE_OK) 110 /* If _write_header failed, copy the error. */ 111 archive_copy_error(&a->archive, ad); 112 else if (!archive_entry_size_is_set(entry) || archive_entry_size(entry) > 0) 113 /* Otherwise, pour data into the entry. */ 114 r = copy_data(_a, ad); 115 r2 = archive_write_finish_entry(ad); 116 if (r2 < ARCHIVE_WARN) 117 r2 = ARCHIVE_WARN; 118 /* Use the first message. */ 119 if (r2 != ARCHIVE_OK && r == ARCHIVE_OK) 120 archive_copy_error(&a->archive, ad); 121 /* Use the worst error return. */ 122 if (r2 < r) 123 r = r2; 124 return (r); 125 } 126 127 void 128 archive_read_extract_set_progress_callback(struct archive *_a, 129 void (*progress_func)(void *), void *user_data) 130 { 131 struct archive_read *a = (struct archive_read *)_a; 132 struct extract *extract = get_extract(a); 133 if (extract != NULL) { 134 extract->extract_progress = progress_func; 135 extract->extract_progress_user_data = user_data; 136 } 137 } 138 139 static int 140 copy_data(struct archive *ar, struct archive *aw) 141 { 142 int64_t offset; 143 const void *buff; 144 struct extract *extract; 145 size_t size; 146 int r; 147 148 extract = get_extract((struct archive_read *)ar); 149 if (extract == NULL) 150 return (ARCHIVE_FATAL); 151 for (;;) { 152 r = archive_read_data_block(ar, &buff, &size, &offset); 153 if (r == ARCHIVE_EOF) 154 return (ARCHIVE_OK); 155 if (r != ARCHIVE_OK) 156 return (r); 157 r = (int)archive_write_data_block(aw, buff, size, offset); 158 if (r < ARCHIVE_WARN) 159 r = ARCHIVE_WARN; 160 if (r != ARCHIVE_OK) { 161 archive_set_error(ar, archive_errno(aw), 162 "%s", archive_error_string(aw)); 163 return (r); 164 } 165 if (extract->extract_progress) 166 (extract->extract_progress) 167 (extract->extract_progress_user_data); 168 } 169 } 170 171 /* 172 * Cleanup function for archive_extract. 173 */ 174 static int 175 archive_read_extract_cleanup(struct archive_read *a) 176 { 177 int ret = ARCHIVE_OK; 178 179 ret = archive_write_free(a->extract->ad); 180 free(a->extract); 181 a->extract = NULL; 182 return (ret); 183 } 184