contrib/libarchive-2/libarchive/archive_read_extract.c

   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 }