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 
53 struct write_fd_data {
54 	int		fd;
55 };
56 
57 static int	file_close(struct archive *, void *);
58 static int	file_open(struct archive *, void *);
59 static ssize_t	file_write(struct archive *, void *, const void *buff, size_t);
60 
61 int
62 archive_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_open(a, mine,
76 		    file_open, file_write, file_close));
77 }
78 
79 static int
80 file_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 
117 static ssize_t
118 file_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 
136 static int
137 file_close(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 	free(mine);
143 	return (ARCHIVE_OK);
144 }
145