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_private.h" 44 #include "archive_read_private.h" 45 #include "archive_write_disk_private.h" 46 47 struct extract { 48 struct archive *ad; /* archive_write_disk object */ 49 50 /* Progress function invoked during extract. */ 51 void (*extract_progress)(void *); 52 void *extract_progress_user_data; 53 }; 54 55 static int archive_read_extract_cleanup(struct archive_read *); 56 static int copy_data(struct archive *ar, struct archive *aw); 57 static struct extract *get_extract(struct archive_read *); 58 59 static struct extract * 60 get_extract(struct archive_read *a) 61 { 62 /* If we haven't initialized, do it now. */ 63 /* This also sets up a lot of global state. */ 64 if (a->extract == NULL) { 65 a->extract = (struct extract *)malloc(sizeof(*a->extract)); 66 if (a->extract == NULL) { 67 archive_set_error(&a->archive, ENOMEM, "Can't extract"); 68 return (NULL); 69 } 70 memset(a->extract, 0, sizeof(*a->extract)); 71 a->extract->ad = archive_write_disk_new(); 72 if (a->extract->ad == NULL) { 73 archive_set_error(&a->archive, ENOMEM, "Can't extract"); 74 return (NULL); 75 } 76 archive_write_disk_set_standard_lookup(a->extract->ad); 77 a->cleanup_archive_extract = archive_read_extract_cleanup; 78 } 79 return (a->extract); 80 } 81 82 int 83 archive_read_extract(struct archive *_a, struct archive_entry *entry, int flags) 84 { 85 struct extract *extract; 86 87 extract = get_extract((struct archive_read *)_a); 88 if (extract == NULL) 89 return (ARCHIVE_FATAL); 90 archive_write_disk_set_options(extract->ad, flags); 91 return (archive_read_extract2(_a, entry, extract->ad)); 92 } 93 94 int 95 archive_read_extract2(struct archive *_a, struct archive_entry *entry, 96 struct archive *ad) 97 { 98 struct archive_read *a = (struct archive_read *)_a; 99 int r, r2; 100 101 /* Set up for this particular entry. */ 102 archive_write_disk_set_skip_file(ad, 103 a->skip_file_dev, a->skip_file_ino); 104 r = archive_write_header(ad, entry); 105 if (r < ARCHIVE_WARN) 106 r = ARCHIVE_WARN; 107 if (r != ARCHIVE_OK) 108 /* If _write_header failed, copy the error. */ 109 archive_copy_error(&a->archive, ad); 110 else 111 /* Otherwise, pour data into the entry. */ 112 r = copy_data(_a, ad); 113 r2 = archive_write_finish_entry(ad); 114 if (r2 < ARCHIVE_WARN) 115 r2 = ARCHIVE_WARN; 116 /* Use the first message. */ 117 if (r2 != ARCHIVE_OK && r == ARCHIVE_OK) 118 archive_copy_error(&a->archive, ad); 119 /* Use the worst error return. */ 120 if (r2 < r) 121 r = r2; 122 return (r); 123 } 124 125 void 126 archive_read_extract_set_progress_callback(struct archive *_a, 127 void (*progress_func)(void *), void *user_data) 128 { 129 struct archive_read *a = (struct archive_read *)_a; 130 struct extract *extract = get_extract(a); 131 if (extract != NULL) { 132 extract->extract_progress = progress_func; 133 extract->extract_progress_user_data = user_data; 134 } 135 } 136 137 static int 138 copy_data(struct archive *ar, struct archive *aw) 139 { 140 off_t offset; 141 const void *buff; 142 struct extract *extract; 143 size_t size; 144 int r; 145 146 extract = get_extract((struct archive_read *)ar); 147 for (;;) { 148 r = archive_read_data_block(ar, &buff, &size, &offset); 149 if (r == ARCHIVE_EOF) 150 return (ARCHIVE_OK); 151 if (r != ARCHIVE_OK) 152 return (r); 153 r = archive_write_data_block(aw, buff, size, offset); 154 if (r < ARCHIVE_WARN) 155 r = ARCHIVE_WARN; 156 if (r != ARCHIVE_OK) { 157 archive_set_error(ar, archive_errno(aw), 158 "%s", archive_error_string(aw)); 159 return (r); 160 } 161 if (extract->extract_progress) 162 (extract->extract_progress) 163 (extract->extract_progress_user_data); 164 } 165 } 166 167 /* 168 * Cleanup function for archive_extract. 169 */ 170 static int 171 archive_read_extract_cleanup(struct archive_read *a) 172 { 173 int ret = ARCHIVE_OK; 174 175 #if ARCHIVE_API_VERSION > 1 176 ret = 177 #endif 178 archive_write_finish(a->extract->ad); 179 free(a->extract); 180 a->extract = NULL; 181 return (ret); 182 } 183