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      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 *
     51 __archive_read_get_extract(struct archive_read *a)
     52 {
     53 	if (a->extract == NULL) {
     54 		a->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
     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
     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
    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
    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