/*-

 * Copyright (c) 2003-2007 Tim Kientzle

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 * 1. Redistributions of source code must retain the above copyright

 *    notice, this list of conditions and the following disclaimer.

 * 2. Redistributions in binary form must reproduce the above copyright

 *    notice, this list of conditions and the following disclaimer in the

 *    documentation and/or other materials provided with the distribution.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR

 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,

 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#include "archive_platform.h"

__FBSDID("$FreeBSD: head/lib/libarchive/archive_write_open_filename.c 191165 2009-04-17 00:39:35Z kientzle $");

#ifdef HAVE_SYS_STAT_H

#include <sys/stat.h>

#endif

#ifdef HAVE_ERRNO_H

#include <errno.h>

#endif

#ifdef HAVE_FCNTL_H

#include <fcntl.h>

#endif

#ifdef HAVE_STDLIB_H

#include <stdlib.h>

#endif

#ifdef HAVE_STRING_H

#include <string.h>

#endif

#ifdef HAVE_UNISTD_H

#include <unistd.h>

#endif

#include "archive.h"

#include "archive_private.h"

#include "archive_string.h"

#ifndef O_BINARY

#define O_BINARY 0

#endif

#ifndef O_CLOEXEC

#define O_CLOEXEC	0

#endif

struct write_file_data {

	int		fd;

	struct archive_mstring filename;

};

static int	file_close(struct archive *, void *);

static int	file_open(struct archive *, void *);

static ssize_t	file_write(struct archive *, void *, const void *buff, size_t);

static int	open_filename(struct archive *, int, const void *);

int

archive_write_open_file(struct archive *a, const char *filename)

{

	return (archive_write_open_filename(a, filename));

}

int

archive_write_open_filename(struct archive *a, const char *filename)

{

	if (filename == NULL || filename[0] == '\0')

		return (archive_write_open_fd(a, 1));

	return (open_filename(a, 1, filename));

}

int

archive_write_open_filename_w(struct archive *a, const wchar_t *filename)

{

	if (filename == NULL || filename[0] == L'\0')

		return (archive_write_open_fd(a, 1));

	return (open_filename(a, 0, filename));

}

static int

open_filename(struct archive *a, int mbs_fn, const void *filename)

{

	struct write_file_data *mine;

	int r;

	mine = (struct write_file_data *)calloc(1, sizeof(*mine));

	if (mine == NULL) {

		archive_set_error(a, ENOMEM, "No memory");

		return (ARCHIVE_FATAL);

	}

	if (mbs_fn)

		r = archive_mstring_copy_mbs(&mine->filename, filename);

	else

		r = archive_mstring_copy_wcs(&mine->filename, filename);

	if (r < 0) {

		if (errno == ENOMEM) {

			archive_set_error(a, ENOMEM, "No memory");

			return (ARCHIVE_FATAL);

		}

		if (mbs_fn)

			archive_set_error(a, ARCHIVE_ERRNO_MISC,

			    "Can't convert '%s' to WCS",

			    (const char *)filename);

		else

			archive_set_error(a, ARCHIVE_ERRNO_MISC,

			    "Can't convert '%S' to MBS",

			    (const wchar_t *)filename);

		return (ARCHIVE_FAILED);

	}

	mine->fd = -1;

	return (archive_write_open(a, mine,

		file_open, file_write, file_close));

}

static int

file_open(struct archive *a, void *client_data)

{

	int flags;

	struct write_file_data *mine;

	struct stat st;

#if defined(_WIN32) && !defined(__CYGWIN__)

	wchar_t *fullpath;

#endif

	const wchar_t *wcs;

	const char *mbs;

	mine = (struct write_file_data *)client_data;

	flags = O_WRONLY | O_CREAT | O_TRUNC | O_BINARY | O_CLOEXEC;

	/*

	 * Open the file.

	 */

	mbs = NULL; wcs = NULL;

#if defined(_WIN32) && !defined(__CYGWIN__)

	if (archive_mstring_get_wcs(a, &mine->filename, &wcs) != 0) {

		if (errno == ENOMEM)

			archive_set_error(a, errno, "No memory");

		else {

			archive_mstring_get_mbs(a, &mine->filename, &mbs);

			archive_set_error(a, errno,

			    "Can't convert '%s' to WCS", mbs);

		}

		return (ARCHIVE_FATAL);

	}

	fullpath = __la_win_permissive_name_w(wcs);

	if (fullpath != NULL) {

		mine->fd = _wopen(fullpath, flags, 0666);

		free(fullpath);

	} else

		mine->fd = _wopen(wcs, flags, 0666);

#else

	if (archive_mstring_get_mbs(a, &mine->filename, &mbs) != 0) {

		if (errno == ENOMEM)

			archive_set_error(a, errno, "No memory");

		else {

			archive_mstring_get_wcs(a, &mine->filename, &wcs;;

			archive_set_error(a, errno,

			    "Can't convert '%S' to MBS", wcs);

		}

		return (ARCHIVE_FATAL);

	}

	mine->fd = open(mbs, flags, 0666);

	__archive_ensure_cloexec_flag(mine->fd);

#endif

	if (mine->fd < 0) {

		if (mbs != NULL)

			archive_set_error(a, errno, "Failed to open '%s'", mbs);

		else

			archive_set_error(a, errno, "Failed to open '%S'", wcs);

		return (ARCHIVE_FATAL);

	}

	if (fstat(mine->fd, &st) != 0) {

		if (mbs != NULL)

			archive_set_error(a, errno, "Couldn't stat '%s'", mbs);

		else

			archive_set_error(a, errno, "Couldn't stat '%S'", wcs);

		return (ARCHIVE_FATAL);

	}

	/*

	 * Set up default last block handling.

	 */

	if (archive_write_get_bytes_in_last_block(a) < 0) {

		if (S_ISCHR(st.st_mode) || S_ISBLK(st.st_mode) ||

		    S_ISFIFO(st.st_mode))

			/* Pad last block when writing to device or FIFO. */

			archive_write_set_bytes_in_last_block(a, 0);

		else

			/* Don't pad last block otherwise. */

			archive_write_set_bytes_in_last_block(a, 1);

	}

	/*

	 * If the output file is a regular file, don't add it to

	 * itself.  If it's a device file, it's okay to add the device

	 * entry to the output archive.

	 */

	if (S_ISREG(st.st_mode))

		archive_write_set_skip_file(a, st.st_dev, st.st_ino);

	return (ARCHIVE_OK);

}

static ssize_t

file_write(struct archive *a, void *client_data, const void *buff,

    size_t length)

{

	struct write_file_data	*mine;

	ssize_t	bytesWritten;

	mine = (struct write_file_data *)client_data;

	for (;;) {

		bytesWritten = write(mine->fd, buff, length);

		if (bytesWritten <= 0) {

			if (errno == EINTR)

				continue;

			archive_set_error(a, errno, "Write error");

			return (-1);

		}

		return (bytesWritten);

	}

}

static int

file_close(struct archive *a, void *client_data)

{

	struct write_file_data	*mine = (struct write_file_data *)client_data;

	(void)a; /* UNUSED */

	if (mine->fd >= 0)

		close(mine->fd);

	archive_mstring_clean(&mine->filename);

	free(mine);

	return (ARCHIVE_OK);

}