/*-

 * 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_fd.c 201093 2009-12-28 02:28:44Z 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_IO_H

#include <io.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"

struct write_fd_data {

	int		fd;

};

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);

int

archive_write_open_fd(struct archive *a, int fd)

{

	struct write_fd_data *mine;

	mine = (struct write_fd_data *)malloc(sizeof(*mine));

	if (mine == NULL) {

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

		return (ARCHIVE_FATAL);

	}

	mine->fd = fd;

#if defined(__CYGWIN__) || defined(_WIN32)

	setmode(mine->fd, O_BINARY);

#endif

	return (archive_write_open(a, mine,

		    file_open, file_write, file_close));

}

static int

file_open(struct archive *a, void *client_data)

{

	struct write_fd_data *mine;

	struct stat st;

	mine = (struct write_fd_data *)client_data;

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

		archive_set_error(a, errno, "Couldn't stat fd %d", mine->fd);

		return (ARCHIVE_FATAL);

	}

	/*

	 * If this is a regular file, don't add it to itself.

	 */

	if (S_ISREG(st.st_mode))

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

	/*

	 * If client hasn't explicitly set the last block handling,

	 * then set it here.

	 */

	if (archive_write_get_bytes_in_last_block(a) < 0) {

		/* If the output is a block or character device, fifo,

		 * or stdout, pad the last block, otherwise leave it

		 * unpadded. */

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

		    S_ISFIFO(st.st_mode) || (mine->fd == 1))

			/* Last block will be fully padded. */

			archive_write_set_bytes_in_last_block(a, 0);

		else

			archive_write_set_bytes_in_last_block(a, 1);

	}

	return (ARCHIVE_OK);

}

static ssize_t

file_write(struct archive *a, void *client_data, const void *buff, size_t length)

{

	struct write_fd_data	*mine;

	ssize_t	bytesWritten;

	mine = (struct write_fd_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_fd_data	*mine = (struct write_fd_data *)client_data;

	(void)a; /* UNUSED */

	free(mine);

	return (ARCHIVE_OK);

}