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: head/lib/libarchive/archive_write_open_fd.c 201093 2009-12-28 02:28:44Z kientzle $");
28
29#ifdef HAVE_SYS_STAT_H
30#include <sys/stat.h>
31#endif
32#ifdef HAVE_ERRNO_H
33#include <errno.h>
34#endif
35#ifdef HAVE_FCNTL_H
36#include <fcntl.h>
37#endif
38#ifdef HAVE_IO_H
39#include <io.h>
40#endif
41#ifdef HAVE_STDLIB_H
42#include <stdlib.h>
43#endif
44#ifdef HAVE_STRING_H
45#include <string.h>
46#endif
47#ifdef HAVE_UNISTD_H
48#include <unistd.h>
49#endif
50
51#include "archive.h"
52
53struct write_fd_data {
54	off_t		offset;
55	int		fd;
56};
57
58static int	file_close(struct archive *, void *);
59static int	file_open(struct archive *, void *);
60static ssize_t	file_write(struct archive *, void *, const void *buff, size_t);
61
62int
63archive_write_open_fd(struct archive *a, int fd)
64{
65	struct write_fd_data *mine;
66
67	mine = (struct write_fd_data *)malloc(sizeof(*mine));
68	if (mine == NULL) {
69		archive_set_error(a, ENOMEM, "No memory");
70		return (ARCHIVE_FATAL);
71	}
72	mine->fd = fd;
73#if defined(__CYGWIN__) || defined(_WIN32)
74	setmode(mine->fd, O_BINARY);
75#endif
76	return (archive_write_open(a, mine,
77		    file_open, file_write, file_close));
78}
79
80static int
81file_open(struct archive *a, void *client_data)
82{
83	struct write_fd_data *mine;
84	struct stat st;
85
86	mine = (struct write_fd_data *)client_data;
87
88	if (fstat(mine->fd, &st) != 0) {
89		archive_set_error(a, errno, "Couldn't stat fd %d", mine->fd);
90		return (ARCHIVE_FATAL);
91	}
92
93	/*
94	 * If this is a regular file, don't add it to itself.
95	 */
96	if (S_ISREG(st.st_mode))
97		archive_write_set_skip_file(a, st.st_dev, st.st_ino);
98
99	/*
100	 * If client hasn't explicitly set the last block handling,
101	 * then set it here.
102	 */
103	if (archive_write_get_bytes_in_last_block(a) < 0) {
104		/* If the output is a block or character device, fifo,
105		 * or stdout, pad the last block, otherwise leave it
106		 * unpadded. */
107		if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode) ||
108		    S_ISFIFO(st.st_mode) || (mine->fd == 1))
109			/* Last block will be fully padded. */
110			archive_write_set_bytes_in_last_block(a, 0);
111		else
112			archive_write_set_bytes_in_last_block(a, 1);
113	}
114
115	return (ARCHIVE_OK);
116}
117
118static ssize_t
119file_write(struct archive *a, void *client_data, const void *buff, size_t length)
120{
121	struct write_fd_data	*mine;
122	ssize_t	bytesWritten;
123
124	mine = (struct write_fd_data *)client_data;
125	bytesWritten = write(mine->fd, buff, length);
126	if (bytesWritten <= 0) {
127		archive_set_error(a, errno, "Write error");
128		return (-1);
129	}
130	return (bytesWritten);
131}
132
133static int
134file_close(struct archive *a, void *client_data)
135{
136	struct write_fd_data	*mine = (struct write_fd_data *)client_data;
137
138	(void)a; /* UNUSED */
139	free(mine);
140	return (ARCHIVE_OK);
141}
142