archive_write_open_filename.c revision 368707 
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_filename.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_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#include "archive_private.h"
50#include "archive_string.h"
51
52#ifndef O_BINARY
53#define O_BINARY 0
54#endif
55#ifndef O_CLOEXEC
56#define O_CLOEXEC	0
57#endif
58
59struct write_file_data {
60	int		fd;
61	struct archive_mstring filename;
62};
63
64static int	file_close(struct archive *, void *);
65static int	file_free(struct archive *, void *);
66static int	file_open(struct archive *, void *);
67static ssize_t	file_write(struct archive *, void *, const void *buff, size_t);
68static int	open_filename(struct archive *, int, const void *);
69
70int
71archive_write_open_file(struct archive *a, const char *filename)
72{
73	return (archive_write_open_filename(a, filename));
74}
75
76int
77archive_write_open_filename(struct archive *a, const char *filename)
78{
79
80	if (filename == NULL || filename[0] == '\0')
81		return (archive_write_open_fd(a, 1));
82
83	return (open_filename(a, 1, filename));
84}
85
86int
87archive_write_open_filename_w(struct archive *a, const wchar_t *filename)
88{
89
90	if (filename == NULL || filename[0] == L'\0')
91		return (archive_write_open_fd(a, 1));
92
93	return (open_filename(a, 0, filename));
94}
95
96static int
97open_filename(struct archive *a, int mbs_fn, const void *filename)
98{
99	struct write_file_data *mine;
100	int r;
101
102	mine = (struct write_file_data *)calloc(1, sizeof(*mine));
103	if (mine == NULL) {
104		archive_set_error(a, ENOMEM, "No memory");
105		return (ARCHIVE_FATAL);
106	}
107	if (mbs_fn)
108		r = archive_mstring_copy_mbs(&mine->filename, filename);
109	else
110		r = archive_mstring_copy_wcs(&mine->filename, filename);
111	if (r < 0) {
112		if (errno == ENOMEM) {
113			archive_set_error(a, ENOMEM, "No memory");
114			return (ARCHIVE_FATAL);
115		}
116		if (mbs_fn)
117			archive_set_error(a, ARCHIVE_ERRNO_MISC,
118			    "Can't convert '%s' to WCS",
119			    (const char *)filename);
120		else
121			archive_set_error(a, ARCHIVE_ERRNO_MISC,
122			    "Can't convert '%S' to MBS",
123			    (const wchar_t *)filename);
124		return (ARCHIVE_FAILED);
125	}
126	mine->fd = -1;
127	return (archive_write_open2(a, mine,
128		    file_open, file_write, file_close, file_free));
129}
130
131static int
132file_open(struct archive *a, void *client_data)
133{
134	int flags;
135	struct write_file_data *mine;
136	struct stat st;
137#if defined(_WIN32) && !defined(__CYGWIN__)
138	wchar_t *fullpath;
139#endif
140	const wchar_t *wcs;
141	const char *mbs;
142
143	mine = (struct write_file_data *)client_data;
144	flags = O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_CLOEXEC;
145
146	/*
147	 * Open the file.
148	 */
149	mbs = NULL; wcs = NULL;
150#if defined(_WIN32) && !defined(__CYGWIN__)
151	if (archive_mstring_get_wcs(a, &mine->filename, &wcs) != 0) {
152		if (errno == ENOMEM)
153			archive_set_error(a, errno, "No memory");
154		else {
155			archive_mstring_get_mbs(a, &mine->filename, &mbs);
156			archive_set_error(a, errno,
157			    "Can't convert '%s' to WCS", mbs);
158		}
159		return (ARCHIVE_FATAL);
160	}
161	fullpath = __la_win_permissive_name_w(wcs);
162	if (fullpath != NULL) {
163		mine->fd = _wopen(fullpath, flags, 0666);
164		free(fullpath);
165	} else
166		mine->fd = _wopen(wcs, flags, 0666);
167#else
168	if (archive_mstring_get_mbs(a, &mine->filename, &mbs) != 0) {
169		if (errno == ENOMEM)
170			archive_set_error(a, errno, "No memory");
171		else {
172			archive_mstring_get_wcs(a, &mine->filename, &wcs);
173			archive_set_error(a, errno,
174			    "Can't convert '%S' to MBS", wcs);
175		}
176		return (ARCHIVE_FATAL);
177	}
178	mine->fd = open(mbs, flags, 0666);
179	__archive_ensure_cloexec_flag(mine->fd);
180#endif
181	if (mine->fd < 0) {
182		if (mbs != NULL)
183			archive_set_error(a, errno, "Failed to open '%s'", mbs);
184		else
185			archive_set_error(a, errno, "Failed to open '%S'", wcs);
186		return (ARCHIVE_FATAL);
187	}
188
189	if (fstat(mine->fd, &st) != 0) {
190		if (mbs != NULL)
191			archive_set_error(a, errno, "Couldn't stat '%s'", mbs);
192		else
193			archive_set_error(a, errno, "Couldn't stat '%S'", wcs);
194		return (ARCHIVE_FATAL);
195	}
196
197	/*
198	 * Set up default last block handling.
199	 */
200	if (archive_write_get_bytes_in_last_block(a) < 0) {
201		if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode) ||
202		    S_ISFIFO(st.st_mode))
203			/* Pad last block when writing to device or FIFO. */
204			archive_write_set_bytes_in_last_block(a, 0);
205		else
206			/* Don't pad last block otherwise. */
207			archive_write_set_bytes_in_last_block(a, 1);
208	}
209
210	/*
211	 * If the output file is a regular file, don't add it to
212	 * itself.  If it's a device file, it's okay to add the device
213	 * entry to the output archive.
214	 */
215	if (S_ISREG(st.st_mode))
216		archive_write_set_skip_file(a, st.st_dev, st.st_ino);
217
218	return (ARCHIVE_OK);
219}
220
221static ssize_t
222file_write(struct archive *a, void *client_data, const void *buff,
223    size_t length)
224{
225	struct write_file_data	*mine;
226	ssize_t	bytesWritten;
227
228	mine = (struct write_file_data *)client_data;
229	for (;;) {
230		bytesWritten = write(mine->fd, buff, length);
231		if (bytesWritten <= 0) {
232			if (errno == EINTR)
233				continue;
234			archive_set_error(a, errno, "Write error");
235			return (-1);
236		}
237		return (bytesWritten);
238	}
239}
240
241static int
242file_close(struct archive *a, void *client_data)
243{
244	struct write_file_data	*mine = (struct write_file_data *)client_data;
245
246	(void)a; /* UNUSED */
247
248	if (mine == NULL)
249		return (ARCHIVE_FATAL);
250
251	if (mine->fd >= 0)
252		close(mine->fd);
253
254	return (ARCHIVE_OK);
255}
256
257static int
258file_free(struct archive *a, void *client_data)
259{
260	struct write_file_data	*mine = (struct write_file_data *)client_data;
261
262	(void)a; /* UNUSED */
263
264	if (mine == NULL)
265		return (ARCHIVE_OK);
266
267	archive_mstring_clean(&mine->filename);
268	free(mine);
269	return (ARCHIVE_OK);
270}
271