2 * Copyright (c) 2003-2004 Tim Kientzle
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer
10 * in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 #include "archive_platform.h"
28 __FBSDID("$FreeBSD: src/lib/libarchive/archive_read_data_into_fd.c,v 1.10 2005/09/24 21:15:00 kientzle Exp $");
30 #include <sys/types.h>
35 #include "archive_private.h"
37 /* Maximum amount of data to write at one time. */
38 #define MAX_WRITE (1024 * 1024)
41 * This implementation minimizes copying of data and is sparse-file aware.
44 archive_read_data_into_fd(struct archive *a, int fd)
49 ssize_t bytes_to_write, bytes_written, total_written;
53 __archive_check_magic(a, ARCHIVE_READ_MAGIC, ARCHIVE_STATE_DATA, "archive_read_data_into_fd");
58 while ((r = archive_read_data_block(a, &buff, &size, &offset)) ==
60 if (offset > output_offset) {
61 lseek(fd, offset - output_offset, SEEK_CUR);
62 output_offset = offset;
65 bytes_to_write = size;
66 if (bytes_to_write > MAX_WRITE)
67 bytes_to_write = MAX_WRITE;
68 bytes_written = write(fd, buff, bytes_to_write);
69 if (bytes_written < 0) {
70 archive_set_error(a, errno, "Write error");
73 output_offset += bytes_written;
74 total_written += bytes_written;
75 size -= bytes_written;
76 if (a->extract_progress != NULL)
77 (*a->extract_progress)(a->extract_progress_user_data);