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: stable/11/contrib/libarchive/libarchive/archive_write_open_fd.c 368707 2020-12-16 22:25:20Z mm $");
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	int		fd;
55};
56
57static int	file_free(struct archive *, void *);
58static int	file_open(struct archive *, void *);
59static ssize_t	file_write(struct archive *, void *, const void *buff, size_t);
60
61int
62archive_write_open_fd(struct archive *a, int fd)
63{
64	struct write_fd_data *mine;
65
66	mine = (struct write_fd_data *)malloc(sizeof(*mine));
67	if (mine == NULL) {
68		archive_set_error(a, ENOMEM, "No memory");
69		return (ARCHIVE_FATAL);
70	}
71	mine->fd = fd;
72#if defined(__CYGWIN__) || defined(_WIN32)
73	setmode(mine->fd, O_BINARY);
74#endif
75	return (archive_write_open2(a, mine,
76		    file_open, file_write, NULL, file_free));
77}
78
79static int
80file_open(struct archive *a, void *client_data)
81{
82	struct write_fd_data *mine;
83	struct stat st;
84
85	mine = (struct write_fd_data *)client_data;
86
87	if (fstat(mine->fd, &st) != 0) {
88		archive_set_error(a, errno, "Couldn't stat fd %d", mine->fd);
89		return (ARCHIVE_FATAL);
90	}
91
92	/*
93	 * If this is a regular file, don't add it to itself.
94	 */
95	if (S_ISREG(st.st_mode))
96		archive_write_set_skip_file(a, st.st_dev, st.st_ino);
97
98	/*
99	 * If client hasn't explicitly set the last block handling,
100	 * then set it here.
101	 */
102	if (archive_write_get_bytes_in_last_block(a) < 0) {
103		/* If the output is a block or character device, fifo,
104		 * or stdout, pad the last block, otherwise leave it
105		 * unpadded. */
106		if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode) ||
107		    S_ISFIFO(st.st_mode) || (mine->fd == 1))
108			/* Last block will be fully padded. */
109			archive_write_set_bytes_in_last_block(a, 0);
110		else
111			archive_write_set_bytes_in_last_block(a, 1);
112	}
113
114	return (ARCHIVE_OK);
115}
116
117static ssize_t
118file_write(struct archive *a, void *client_data, const void *buff, size_t length)
119{
120	struct write_fd_data	*mine;
121	ssize_t	bytesWritten;
122
123	mine = (struct write_fd_data *)client_data;
124	for (;;) {
125		bytesWritten = write(mine->fd, buff, length);
126		if (bytesWritten <= 0) {
127			if (errno == EINTR)
128				continue;
129			archive_set_error(a, errno, "Write error");
130			return (-1);
131		}
132		return (bytesWritten);
133	}
134}
135
136static int
137file_free(struct archive *a, void *client_data)
138{
139	struct write_fd_data	*mine = (struct write_fd_data *)client_data;
140
141	(void)a; /* UNUSED */
142	if (mine == NULL)
143		return (ARCHIVE_OK);
144	free(mine);
145	return (ARCHIVE_OK);
146}
147