archive_write_open_filename.c revision 229592 
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/9/contrib/libarchive/libarchive/archive_write_open_filename.c 229592 2012-01-05 12:06:54Z 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_STDLIB_H
39#include <stdlib.h>
40#endif
41#ifdef HAVE_STRING_H
42#include <string.h>
43#endif
44#ifdef HAVE_UNISTD_H
45#include <unistd.h>
46#endif
47
48#include "archive.h"
49
50#ifndef O_BINARY
51#define O_BINARY 0
52#endif
53
54struct write_file_data {
55	int		fd;
56	char		filename[1];
57};
58
59static int	file_close(struct archive *, void *);
60static int	file_open(struct archive *, void *);
61static ssize_t	file_write(struct archive *, void *, const void *buff, size_t);
62
63int
64archive_write_open_file(struct archive *a, const char *filename)
65{
66	return (archive_write_open_filename(a, filename));
67}
68
69int
70archive_write_open_filename(struct archive *a, const char *filename)
71{
72	struct write_file_data *mine;
73
74	if (filename == NULL || filename[0] == '\0')
75		return (archive_write_open_fd(a, 1));
76
77	mine = (struct write_file_data *)malloc(sizeof(*mine) + strlen(filename));
78	if (mine == NULL) {
79		archive_set_error(a, ENOMEM, "No memory");
80		return (ARCHIVE_FATAL);
81	}
82	strcpy(mine->filename, filename);
83	mine->fd = -1;
84	return (archive_write_open(a, mine,
85		file_open, file_write, file_close));
86}
87
88static int
89file_open(struct archive *a, void *client_data)
90{
91	int flags;
92	struct write_file_data *mine;
93	struct stat st;
94
95	mine = (struct write_file_data *)client_data;
96	flags = O_WRONLY | O_CREAT | O_TRUNC | O_BINARY;
97
98	/*
99	 * Open the file.
100	 */
101	mine->fd = open(mine->filename, flags, 0666);
102	if (mine->fd < 0) {
103		archive_set_error(a, errno, "Failed to open '%s'",
104		    mine->filename);
105		return (ARCHIVE_FATAL);
106	}
107
108	if (fstat(mine->fd, &st) != 0) {
109               archive_set_error(a, errno, "Couldn't stat '%s'",
110                   mine->filename);
111               return (ARCHIVE_FATAL);
112	}
113
114	/*
115	 * Set up default last block handling.
116	 */
117	if (archive_write_get_bytes_in_last_block(a) < 0) {
118		if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode) ||
119		    S_ISFIFO(st.st_mode))
120			/* Pad last block when writing to device or FIFO. */
121			archive_write_set_bytes_in_last_block(a, 0);
122		else
123			/* Don't pad last block otherwise. */
124			archive_write_set_bytes_in_last_block(a, 1);
125	}
126
127	/*
128	 * If the output file is a regular file, don't add it to
129	 * itself.  If it's a device file, it's okay to add the device
130	 * entry to the output archive.
131	 */
132	if (S_ISREG(st.st_mode))
133		archive_write_set_skip_file(a, st.st_dev, st.st_ino);
134
135	return (ARCHIVE_OK);
136}
137
138static ssize_t
139file_write(struct archive *a, void *client_data, const void *buff, size_t length)
140{
141	struct write_file_data	*mine;
142	ssize_t	bytesWritten;
143
144	mine = (struct write_file_data *)client_data;
145	for (;;) {
146		bytesWritten = write(mine->fd, buff, length);
147		if (bytesWritten <= 0) {
148			if (errno == EINTR)
149				continue;
150			archive_set_error(a, errno, "Write error");
151			return (-1);
152		}
153		return (bytesWritten);
154	}
155}
156
157static int
158file_close(struct archive *a, void *client_data)
159{
160	struct write_file_data	*mine = (struct write_file_data *)client_data;
161
162	(void)a; /* UNUSED */
163	close(mine->fd);
164	free(mine);
165	return (ARCHIVE_OK);
166}
167