Exemplo n.º 1
0
static int
archive_write_zip_close(struct archive_write *a)
{
	struct zip *zip;
	struct zip_file_header_link *l;
	uint8_t h[SIZE_FILE_HEADER];
	uint8_t end[SIZE_CENTRAL_DIRECTORY_END];
	uint8_t e[SIZE_EXTRA_DATA_CENTRAL];
	int64_t offset_start, offset_end;
	int entries;
	int ret;

	zip = a->format_data;
	l = zip->central_directory;

	/*
	 * Formatting central directory file header fields that are
	 * fixed for all entries.
	 * Fields not used (and therefor 0) are:
	 *
	 *   - comment_length
	 *   - disk_number
	 *   - attributes_internal
	 */
	memset(h, 0, sizeof(h));
	archive_le32enc(&h[FILE_HEADER_SIGNATURE], ZIP_SIGNATURE_FILE_HEADER);
	archive_le16enc(&h[FILE_HEADER_VERSION_BY], ZIP_VERSION_BY);
	archive_le16enc(&h[FILE_HEADER_VERSION_EXTRACT], ZIP_VERSION_EXTRACT);

	entries = 0;
	offset_start = zip->written_bytes;

	/* Formatting individual header fields per entry and
	 * writing each entry. */
	while (l != NULL) {
		archive_le16enc(&h[FILE_HEADER_FLAGS], l->flags);
		archive_le16enc(&h[FILE_HEADER_COMPRESSION], l->compression);
		archive_le32enc(&h[FILE_HEADER_TIMEDATE],
			dos_time(archive_entry_mtime(l->entry)));
		archive_le32enc(&h[FILE_HEADER_CRC32], l->crc32);
		archive_le32enc(&h[FILE_HEADER_COMPRESSED_SIZE],
			(uint32_t)l->compressed_size);
		archive_le32enc(&h[FILE_HEADER_UNCOMPRESSED_SIZE],
			(uint32_t)archive_entry_size(l->entry));
		archive_le16enc(&h[FILE_HEADER_FILENAME_LENGTH],
			(uint16_t)path_length(l->entry));
		archive_le16enc(&h[FILE_HEADER_EXTRA_LENGTH], sizeof(e));
		archive_le16enc(&h[FILE_HEADER_ATTRIBUTES_EXTERNAL+2],
			archive_entry_mode(l->entry));
		archive_le32enc(&h[FILE_HEADER_OFFSET], (uint32_t)l->offset);

		/* Formatting extra data. */
		archive_le16enc(&e[EXTRA_DATA_CENTRAL_TIME_ID],
			ZIP_SIGNATURE_EXTRA_TIMESTAMP);
		archive_le16enc(&e[EXTRA_DATA_CENTRAL_TIME_SIZE], 1 + 4);
		e[EXTRA_DATA_CENTRAL_TIME_FLAG] = 0x07;
		archive_le32enc(&e[EXTRA_DATA_CENTRAL_MTIME],
			(uint32_t)archive_entry_mtime(l->entry));
		archive_le16enc(&e[EXTRA_DATA_CENTRAL_UNIX_ID],
			ZIP_SIGNATURE_EXTRA_NEW_UNIX);
		archive_le16enc(&e[EXTRA_DATA_CENTRAL_UNIX_SIZE], 0x0000);

		ret = __archive_write_output(a, h, sizeof(h));
		if (ret != ARCHIVE_OK)
			return (ARCHIVE_FATAL);
		zip->written_bytes += sizeof(h);

		ret = write_path(l->entry, a);
		if (ret <= ARCHIVE_OK)
			return (ARCHIVE_FATAL);
		zip->written_bytes += ret;

		ret = __archive_write_output(a, e, sizeof(e));
		if (ret != ARCHIVE_OK)
			return (ARCHIVE_FATAL);
		zip->written_bytes += sizeof(e);

		l = l->next;
		entries++;
	}
	offset_end = zip->written_bytes;

	/* Formatting end of central directory. */
	memset(end, 0, sizeof(end));
	archive_le32enc(&end[CENTRAL_DIRECTORY_END_SIGNATURE],
		ZIP_SIGNATURE_CENTRAL_DIRECTORY_END);
	archive_le16enc(&end[CENTRAL_DIRECTORY_END_ENTRIES_DISK], entries);
	archive_le16enc(&end[CENTRAL_DIRECTORY_END_ENTRIES], entries);
	archive_le32enc(&end[CENTRAL_DIRECTORY_END_SIZE],
		(uint32_t)(offset_end - offset_start));
	archive_le32enc(&end[CENTRAL_DIRECTORY_END_OFFSET],
		(uint32_t)offset_start);

	/* Writing end of central directory. */
	ret = __archive_write_output(a, end, sizeof(end));
	if (ret != ARCHIVE_OK)
		return (ARCHIVE_FATAL);
	zip->written_bytes += sizeof(end);
	return (ARCHIVE_OK);
}
Exemplo n.º 2
0
static int
archive_write_zip_close(struct archive_write *a)
{
	struct zip *zip;
	struct zip_file_header_link *l;
	struct zip_file_header h;
	struct zip_central_directory_end end;
	struct zip_extra_data_central e;
	int64_t offset_start, offset_end;
	int entries;
	int ret;

	zip = a->format_data;
	l = zip->central_directory;

	/*
	 * Formatting central directory file header fields that are fixed for all entries.
	 * Fields not used (and therefor 0) are:
	 *
	 *   - comment_length
	 *   - disk_number
	 *   - attributes_internal
	 */
	memset(&h, 0, sizeof(h));
	archive_le32enc(&h.signature, ZIP_SIGNATURE_FILE_HEADER);
	archive_le16enc(&h.version_by, ZIP_VERSION_BY);
	archive_le16enc(&h.version_extract, ZIP_VERSION_EXTRACT);

	entries = 0;
	offset_start = zip->written_bytes;

	/* Formatting individual header fields per entry and
	 * writing each entry. */
	while (l != NULL) {
		archive_le16enc(&h.flags, l->flags);
		archive_le16enc(&h.compression, l->compression);
		archive_le32enc(&h.timedate, dos_time(archive_entry_mtime(l->entry)));
		archive_le32enc(&h.crc32, l->crc32);
		archive_le32enc(&h.compressed_size, l->compressed_size);
		archive_le32enc(&h.uncompressed_size, archive_entry_size(l->entry));
		archive_le16enc(&h.filename_length, (uint16_t)path_length(l->entry));
		archive_le16enc(&h.extra_length, sizeof(e));
		archive_le16enc(&h.attributes_external[2], archive_entry_mode(l->entry));
		archive_le32enc(&h.offset, l->offset);

		/* Formatting extra data. */
		archive_le16enc(&e.time_id, ZIP_SIGNATURE_EXTRA_TIMESTAMP);
		archive_le16enc(&e.time_size, sizeof(e.mtime) + sizeof(e.time_flag));
		e.time_flag[0] = 0x07;
		archive_le32enc(&e.mtime, archive_entry_mtime(l->entry));
		archive_le16enc(&e.unix_id, ZIP_SIGNATURE_EXTRA_NEW_UNIX);
		archive_le16enc(&e.unix_size, 0x0000);

		ret = __archive_write_output(a, &h, sizeof(h));
		if (ret != ARCHIVE_OK)
			return (ARCHIVE_FATAL);
		zip->written_bytes += sizeof(h);

		ret = write_path(l->entry, a);
		if (ret <= ARCHIVE_OK)
			return (ARCHIVE_FATAL);
		zip->written_bytes += ret;

		ret = __archive_write_output(a, &e, sizeof(e));
		if (ret != ARCHIVE_OK)
			return (ARCHIVE_FATAL);
		zip->written_bytes += sizeof(e);

		l = l->next;
		entries++;
	}
	offset_end = zip->written_bytes;

	/* Formatting end of central directory. */
	memset(&end, 0, sizeof(end));
	archive_le32enc(&end.signature, ZIP_SIGNATURE_CENTRAL_DIRECTORY_END);
	archive_le16enc(&end.entries_disk, entries);
	archive_le16enc(&end.entries, entries);
	archive_le32enc(&end.size, offset_end - offset_start);
	archive_le32enc(&end.offset, offset_start);

	/* Writing end of central directory. */
	ret = __archive_write_output(a, &end, sizeof(end));
	if (ret != ARCHIVE_OK)
		return (ARCHIVE_FATAL);
	zip->written_bytes += sizeof(end);
	return (ARCHIVE_OK);
}
Exemplo n.º 3
0
static int
archive_write_zip_header(struct archive_write *a, struct archive_entry *entry)
{
	struct zip *zip;
	uint8_t h[SIZE_LOCAL_FILE_HEADER];
	uint8_t e[SIZE_EXTRA_DATA_LOCAL];
	uint8_t *d;
	struct zip_file_header_link *l;
	struct archive_string_conv *sconv;
	int ret, ret2 = ARCHIVE_OK;
	int64_t size;
	mode_t type;

	/* Entries other than a regular file or a folder are skipped. */
	type = archive_entry_filetype(entry);
	if (type != AE_IFREG && type != AE_IFDIR && type != AE_IFLNK) {
		archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
		    "Filetype not supported");
		return ARCHIVE_FAILED;
	};

	/* Directory entries should have a size of 0. */
	if (type == AE_IFDIR)
		archive_entry_set_size(entry, 0);

	zip = a->format_data;
	/* Setup default conversion. */
	if (zip->opt_sconv == NULL && !zip->init_default_conversion) {
		zip->sconv_default =
		    archive_string_default_conversion_for_write(&(a->archive));
		zip->init_default_conversion = 1;
	}

	if (zip->flags == 0) {
		/* Initialize the general purpose flags. */
		zip->flags = ZIP_FLAGS;
		if (zip->opt_sconv != NULL) {
			if (strcmp(archive_string_conversion_charset_name(
			    zip->opt_sconv), "UTF-8") == 0)
				zip->flags |= ZIP_FLAGS_UTF8_NAME;
#if HAVE_NL_LANGINFO
		} else if (strcmp(nl_langinfo(CODESET), "UTF-8") == 0) {
			zip->flags |= ZIP_FLAGS_UTF8_NAME;
#endif
		}
	}
	d = zip->data_descriptor;
	size = archive_entry_size(entry);
	zip->remaining_data_bytes = size;

	/* Append archive entry to the central directory data. */
	l = (struct zip_file_header_link *) malloc(sizeof(*l));
	if (l == NULL) {
		archive_set_error(&a->archive, ENOMEM,
		    "Can't allocate zip header data");
		return (ARCHIVE_FATAL);
	}
#if defined(_WIN32) && !defined(__CYGWIN__)
	/* Make sure the path separators in pahtname, hardlink and symlink
	 * are all slash '/', not the Windows path separator '\'. */
	l->entry = __la_win_entry_in_posix_pathseparator(entry);
	if (l->entry == entry)
		l->entry = archive_entry_clone(entry);
#else
	l->entry = archive_entry_clone(entry);
#endif
	if (l->entry == NULL) {
		archive_set_error(&a->archive, ENOMEM,
		    "Can't allocate zip header data");
		free(l);
		return (ARCHIVE_FATAL);
	}
	l->flags = zip->flags;
	if (zip->opt_sconv != NULL)
		sconv = zip->opt_sconv;
	else
		sconv = zip->sconv_default;
	if (sconv != NULL) {
		const char *p;
		size_t len;

		if (archive_entry_pathname_l(entry, &p, &len, sconv) != 0) {
			if (errno == ENOMEM) {
				archive_entry_free(l->entry);
				free(l);
				archive_set_error(&a->archive, ENOMEM,
				    "Can't allocate memory for Pathname");
				return (ARCHIVE_FATAL);
			}
			archive_set_error(&a->archive,
			    ARCHIVE_ERRNO_FILE_FORMAT,
			    "Can't translate Pathname '%s' to %s",
			    archive_entry_pathname(entry),
			    archive_string_conversion_charset_name(sconv));
			ret2 = ARCHIVE_WARN;
		}
		if (len > 0)
			archive_entry_set_pathname(l->entry, p);

		/*
		 * Although there is no character-set regulation for Symlink,
		 * it is suitable to convert a character-set of Symlinke to
		 * what those of the Pathname has been converted to.
		 */
		if (type == AE_IFLNK) {
			if (archive_entry_symlink_l(entry, &p, &len, sconv)) {
				if (errno == ENOMEM) {
					archive_entry_free(l->entry);
					free(l);
					archive_set_error(&a->archive, ENOMEM,
					    "Can't allocate memory "
					    " for Symlink");
					return (ARCHIVE_FATAL);
				}
				/*
				 * Even if the strng conversion failed,
				 * we should not report the error since
				 * thre is no regulation for.
				 */
			} else if (len > 0)
				archive_entry_set_symlink(l->entry, p);
		}
	}
	/* If all characters in a filename are ASCII, Reset UTF-8 Name flag. */
	if ((l->flags & ZIP_FLAGS_UTF8_NAME) != 0 &&
	    is_all_ascii(archive_entry_pathname(l->entry)))
		l->flags &= ~ZIP_FLAGS_UTF8_NAME;

	/* Initialize the CRC variable and potentially the local crc32(). */
	l->crc32 = crc32(0, NULL, 0);
	if (type == AE_IFLNK) {
		const char *p = archive_entry_symlink(l->entry);
		if (p != NULL)
			size = strlen(p);
		else
			size = 0;
		zip->remaining_data_bytes = 0;
		archive_entry_set_size(l->entry, size);
		l->compression = COMPRESSION_STORE;
		l->compressed_size = size;
	} else {
		l->compression = zip->compression;
		l->compressed_size = 0;
	}
	l->next = NULL;
	if (zip->central_directory == NULL) {
		zip->central_directory = l;
	} else {
		zip->central_directory_end->next = l;
	}
	zip->central_directory_end = l;

	/* Store the offset of this header for later use in central
	 * directory. */
	l->offset = zip->written_bytes;

	memset(h, 0, sizeof(h));
	archive_le32enc(&h[LOCAL_FILE_HEADER_SIGNATURE],
		ZIP_SIGNATURE_LOCAL_FILE_HEADER);
	archive_le16enc(&h[LOCAL_FILE_HEADER_VERSION], ZIP_VERSION_EXTRACT);
	archive_le16enc(&h[LOCAL_FILE_HEADER_FLAGS], l->flags);
	archive_le16enc(&h[LOCAL_FILE_HEADER_COMPRESSION], l->compression);
	archive_le32enc(&h[LOCAL_FILE_HEADER_TIMEDATE],
		dos_time(archive_entry_mtime(entry)));
	archive_le16enc(&h[LOCAL_FILE_HEADER_FILENAME_LENGTH],
		(uint16_t)path_length(l->entry));

	switch (l->compression) {
	case COMPRESSION_STORE:
		/* Setting compressed and uncompressed sizes even when
		 * specification says to set to zero when using data
		 * descriptors. Otherwise the end of the data for an
		 * entry is rather difficult to find. */
		archive_le32enc(&h[LOCAL_FILE_HEADER_COMPRESSED_SIZE],
		    (uint32_t)size);
		archive_le32enc(&h[LOCAL_FILE_HEADER_UNCOMPRESSED_SIZE],
		    (uint32_t)size);
		break;
#ifdef HAVE_ZLIB_H
	case COMPRESSION_DEFLATE:
		archive_le32enc(&h[LOCAL_FILE_HEADER_UNCOMPRESSED_SIZE],
		    (uint32_t)size);

		zip->stream.zalloc = Z_NULL;
		zip->stream.zfree = Z_NULL;
		zip->stream.opaque = Z_NULL;
		zip->stream.next_out = zip->buf;
		zip->stream.avail_out = (uInt)zip->len_buf;
		if (deflateInit2(&zip->stream, Z_DEFAULT_COMPRESSION,
		    Z_DEFLATED, -15, 8, Z_DEFAULT_STRATEGY) != Z_OK) {
			archive_set_error(&a->archive, ENOMEM,
			    "Can't init deflate compressor");
			return (ARCHIVE_FATAL);
		}
		break;
#endif
	}

	/* Formatting extra data. */
	archive_le16enc(&h[LOCAL_FILE_HEADER_EXTRA_LENGTH], sizeof(e));
	archive_le16enc(&e[EXTRA_DATA_LOCAL_TIME_ID],
		ZIP_SIGNATURE_EXTRA_TIMESTAMP);
	archive_le16enc(&e[EXTRA_DATA_LOCAL_TIME_SIZE], 1 + 4 * 3);
	e[EXTRA_DATA_LOCAL_TIME_FLAG] = 0x07;
	archive_le32enc(&e[EXTRA_DATA_LOCAL_MTIME],
	    (uint32_t)archive_entry_mtime(entry));
	archive_le32enc(&e[EXTRA_DATA_LOCAL_ATIME],
	    (uint32_t)archive_entry_atime(entry));
	archive_le32enc(&e[EXTRA_DATA_LOCAL_CTIME],
	    (uint32_t)archive_entry_ctime(entry));

	archive_le16enc(&e[EXTRA_DATA_LOCAL_UNIX_ID],
		ZIP_SIGNATURE_EXTRA_NEW_UNIX);
	archive_le16enc(&e[EXTRA_DATA_LOCAL_UNIX_SIZE], 1 + (1 + 4) * 2);
	e[EXTRA_DATA_LOCAL_UNIX_VERSION] = 1;
	e[EXTRA_DATA_LOCAL_UNIX_UID_SIZE] = 4;
	archive_le32enc(&e[EXTRA_DATA_LOCAL_UNIX_UID],
		(uint32_t)archive_entry_uid(entry));
	e[EXTRA_DATA_LOCAL_UNIX_GID_SIZE] = 4;
	archive_le32enc(&e[EXTRA_DATA_LOCAL_UNIX_GID],
		(uint32_t)archive_entry_gid(entry));

	archive_le32enc(&d[DATA_DESCRIPTOR_UNCOMPRESSED_SIZE],
	    (uint32_t)size);

	ret = __archive_write_output(a, h, sizeof(h));
	if (ret != ARCHIVE_OK)
		return (ARCHIVE_FATAL);
	zip->written_bytes += sizeof(h);

	ret = write_path(l->entry, a);
	if (ret <= ARCHIVE_OK)
		return (ARCHIVE_FATAL);
	zip->written_bytes += ret;

	ret = __archive_write_output(a, e, sizeof(e));
	if (ret != ARCHIVE_OK)
		return (ARCHIVE_FATAL);
	zip->written_bytes += sizeof(e);

	if (type == AE_IFLNK) {
		const unsigned char *p;

		p = (const unsigned char *)archive_entry_symlink(l->entry);
		ret = __archive_write_output(a, p, (size_t)size);
		if (ret != ARCHIVE_OK)
			return (ARCHIVE_FATAL);
		zip->written_bytes += size;
		l->crc32 = crc32(l->crc32, p, (unsigned)size);
	}

	if (ret2 != ARCHIVE_OK)
		return (ret2);
	return (ARCHIVE_OK);
}
Exemplo n.º 4
0
static int
archive_write_zip_header(struct archive_write *a, struct archive_entry *entry)
{
	struct zip *zip;
	struct zip_local_file_header h;
	struct zip_extra_data_local e;
	struct zip_data_descriptor *d;
	struct zip_file_header_link *l;
	struct archive_string_conv *sconv;
	int ret, ret2 = ARCHIVE_OK;
	int64_t size;
	mode_t type;

	/* Entries other than a regular file or a folder are skipped. */
	type = archive_entry_filetype(entry);
	if ((type != AE_IFREG) & (type != AE_IFDIR)) {
		archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
		    "Filetype not supported");
		return ARCHIVE_FAILED;
	}; 

	/* Directory entries should have a size of 0. */
	if (type == AE_IFDIR)
		archive_entry_set_size(entry, 0);

	zip = a->format_data;
	/* Setup default conversion. */
	if (zip->opt_sconv == NULL && !zip->init_default_conversion) {
		zip->sconv_default =
		    archive_string_default_conversion_for_write(&(a->archive));
		zip->init_default_conversion = 1;
	}

	if (zip->flags == 0) {
		/* Initialize the general purpose flags. */
		zip->flags = ZIP_FLAGS;
		if (zip->opt_sconv != NULL) {
			if (strcmp(archive_string_conversion_charset_name(
			    zip->opt_sconv), "UTF-8") == 0)
				zip->flags |= ZIP_FLAGS_UTF8_NAME;
#if HAVE_NL_LANGINFO
		} else if (strcmp(nl_langinfo(CODESET), "UTF-8") == 0) {
			zip->flags |= ZIP_FLAGS_UTF8_NAME;
#endif
		}
	}
	d = &zip->data_descriptor;
	size = archive_entry_size(entry);
	zip->remaining_data_bytes = size;

	/* Append archive entry to the central directory data. */
	l = (struct zip_file_header_link *) malloc(sizeof(*l));
	if (l == NULL) {
		archive_set_error(&a->archive, ENOMEM,
		    "Can't allocate zip header data");
		return (ARCHIVE_FATAL);
	}
	l->entry = archive_entry_clone(entry);
	l->flags = zip->flags;
	if (zip->opt_sconv != NULL)
		sconv = zip->opt_sconv;
	else
		sconv = zip->sconv_default;
	if (sconv != NULL) {
		const char *p;
		size_t len;

		if (archive_entry_pathname_l(entry, &p, &len, sconv) != 0) {
			if (errno == ENOMEM) {
				archive_set_error(&a->archive, ENOMEM,
				    "Can't allocate memory for Pathname");
				return (ARCHIVE_FATAL);
			}
			archive_set_error(&a->archive,
			    ARCHIVE_ERRNO_FILE_FORMAT,
			    "Can't translate pathname '%s' to %s",
			    archive_entry_pathname(entry),
			    archive_string_conversion_charset_name(sconv));
			ret2 = ARCHIVE_WARN;
		}
		if (len > 0)
			archive_entry_set_pathname(l->entry, p);
	}
	/* If all character of a filename is ASCII, Reset UTF-8 Name flag. */
	if ((l->flags & ZIP_FLAGS_UTF8_NAME) != 0 &&
	    is_all_ascii(archive_entry_pathname(l->entry)))
		l->flags &= ~ZIP_FLAGS_UTF8_NAME;

	/* Initialize the CRC variable and potentially the local crc32(). */
	l->crc32 = crc32(0, NULL, 0);
	l->compression = zip->compression;
	l->compressed_size = 0;
	l->next = NULL;
	if (zip->central_directory == NULL) {
		zip->central_directory = l;
	} else {
		zip->central_directory_end->next = l;
	}
	zip->central_directory_end = l;

	/* Store the offset of this header for later use in central directory. */
	l->offset = zip->written_bytes;

	memset(&h, 0, sizeof(h));
	archive_le32enc(&h.signature, ZIP_SIGNATURE_LOCAL_FILE_HEADER);
	archive_le16enc(&h.version, ZIP_VERSION_EXTRACT);
	archive_le16enc(&h.flags, l->flags);
	archive_le16enc(&h.compression, zip->compression);
	archive_le32enc(&h.timedate, dos_time(archive_entry_mtime(entry)));
	archive_le16enc(&h.filename_length, (uint16_t)path_length(l->entry));

	switch (zip->compression) {
	case COMPRESSION_STORE:
		/* Setting compressed and uncompressed sizes even when specification says
		 * to set to zero when using data descriptors. Otherwise the end of the
		 * data for an entry is rather difficult to find. */
		archive_le32enc(&h.compressed_size, size);
		archive_le32enc(&h.uncompressed_size, size);
		break;
#ifdef HAVE_ZLIB_H
	case COMPRESSION_DEFLATE:
		archive_le32enc(&h.uncompressed_size, size);

		zip->stream.zalloc = Z_NULL;
		zip->stream.zfree = Z_NULL;
		zip->stream.opaque = Z_NULL;
		zip->stream.next_out = zip->buf;
		zip->stream.avail_out = zip->len_buf;
		if (deflateInit2(&zip->stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED,
		    -15, 8, Z_DEFAULT_STRATEGY) != Z_OK) {
			archive_set_error(&a->archive, ENOMEM,
			    "Can't init deflate compressor");
			return (ARCHIVE_FATAL);
		}
		break;
#endif
	}

	/* Formatting extra data. */
	archive_le16enc(&h.extra_length, sizeof(e));
	archive_le16enc(&e.time_id, ZIP_SIGNATURE_EXTRA_TIMESTAMP);
	archive_le16enc(&e.time_size, sizeof(e.time_flag) +
	    sizeof(e.mtime) + sizeof(e.atime) + sizeof(e.ctime));
	e.time_flag[0] = 0x07;
	archive_le32enc(&e.mtime, archive_entry_mtime(entry));
	archive_le32enc(&e.atime, archive_entry_atime(entry));
	archive_le32enc(&e.ctime, archive_entry_ctime(entry));

	archive_le16enc(&e.unix_id, ZIP_SIGNATURE_EXTRA_NEW_UNIX);
	archive_le16enc(&e.unix_size, sizeof(e.unix_version) +
	    sizeof(e.unix_uid_size) + sizeof(e.unix_uid) +
	    sizeof(e.unix_gid_size) + sizeof(e.unix_gid));
	e.unix_version = 1;
	e.unix_uid_size = 4;
	archive_le32enc(&e.unix_uid, archive_entry_uid(entry));
	e.unix_gid_size = 4;
	archive_le32enc(&e.unix_gid, archive_entry_gid(entry));

	archive_le32enc(&d->uncompressed_size, size);

	ret = __archive_write_output(a, &h, sizeof(h));
	if (ret != ARCHIVE_OK)
		return (ARCHIVE_FATAL);
	zip->written_bytes += sizeof(h);

	ret = write_path(l->entry, a);
	if (ret <= ARCHIVE_OK)
		return (ARCHIVE_FATAL);
	zip->written_bytes += ret;

	ret = __archive_write_output(a, &e, sizeof(e));
	if (ret != ARCHIVE_OK)
		return (ARCHIVE_FATAL);
	zip->written_bytes += sizeof(e);

	if (ret2 != ARCHIVE_OK)
		return (ret2);
	return (ARCHIVE_OK);
}
static int
archive_write_zip_header(struct archive_write *a, struct archive_entry *entry)
{
	struct zip *zip;
	struct zip_local_file_header h;
	struct zip_extra_data_local e;
	struct zip_data_descriptor *d;
	struct zip_file_header_link *l;
	int ret;
	int64_t size;
	mode_t type;

	/* Entries other than a regular file or a folder are skipped. */
	type = archive_entry_filetype(entry);
	if ((type != AE_IFREG) & (type != AE_IFDIR)) {
		archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC, "Filetype not supported");
		return ARCHIVE_FAILED;
	};

	/* Directory entries should have a size of 0. */
	if (type == AE_IFDIR)
		archive_entry_set_size(entry, 0);

	zip = a->format_data;
	d = &zip->data_descriptor;
	size = archive_entry_size(entry);
	zip->remaining_data_bytes = size;

	/* Append archive entry to the central directory data. */
	l = (struct zip_file_header_link *) malloc(sizeof(*l));
	if (l == NULL) {
		archive_set_error(&a->archive, ENOMEM, "Can't allocate zip header data");
		return (ARCHIVE_FATAL);
	}
	l->entry = archive_entry_clone(entry);
	/* Initialize the CRC variable and potentially the local crc32(). */
	l->crc32 = crc32(0, NULL, 0);
	l->compression = zip->compression;
	l->compressed_size = 0;
	l->next = NULL;
	if (zip->central_directory == NULL) {
		zip->central_directory = l;
	} else {
		zip->central_directory_end->next = l;
	}
	zip->central_directory_end = l;

	/* Store the offset of this header for later use in central directory. */
	l->offset = zip->written_bytes;

	memset(&h, 0, sizeof(h));
	archive_le32enc(&h.signature, ZIP_SIGNATURE_LOCAL_FILE_HEADER);
	archive_le16enc(&h.version, ZIP_VERSION_EXTRACT);
	archive_le16enc(&h.flags, ZIP_FLAGS);
	archive_le16enc(&h.compression, zip->compression);
	archive_le32enc(&h.timedate, dos_time(archive_entry_mtime(entry)));
	archive_le16enc(&h.filename_length, (uint16_t)path_length(entry));

	switch (zip->compression) {
	case COMPRESSION_STORE:
		/* Setting compressed and uncompressed sizes even when specification says
		 * to set to zero when using data descriptors. Otherwise the end of the
		 * data for an entry is rather difficult to find. */
		archive_le32enc(&h.compressed_size, size);
		archive_le32enc(&h.uncompressed_size, size);
		break;
#ifdef HAVE_ZLIB_H
	case COMPRESSION_DEFLATE:
		archive_le32enc(&h.uncompressed_size, size);

		zip->stream.zalloc = Z_NULL;
		zip->stream.zfree = Z_NULL;
		zip->stream.opaque = Z_NULL;
		zip->stream.next_out = zip->buf;
		zip->stream.avail_out = zip->len_buf;
		if (deflateInit2(&zip->stream, Z_DEFAULT_COMPRESSION, Z_DEFLATED,
		    -15, 8, Z_DEFAULT_STRATEGY) != Z_OK) {
			archive_set_error(&a->archive, ENOMEM, "Can't init deflate compressor");
			return (ARCHIVE_FATAL);
		}
		break;
#endif
	}

	/* Formatting extra data. */
	archive_le16enc(&h.extra_length, sizeof(e));
	archive_le16enc(&e.time_id, ZIP_SIGNATURE_EXTRA_TIMESTAMP);
	archive_le16enc(&e.time_size, sizeof(e.time_flag) +
	    sizeof(e.mtime) + sizeof(e.atime) + sizeof(e.ctime));
	e.time_flag[0] = 0x07;
	archive_le32enc(&e.mtime, archive_entry_mtime(entry));
	archive_le32enc(&e.atime, archive_entry_atime(entry));
	archive_le32enc(&e.ctime, archive_entry_ctime(entry));
	    
	archive_le16enc(&e.unix_id, ZIP_SIGNATURE_EXTRA_UNIX);
	archive_le16enc(&e.unix_size, sizeof(e.unix_uid) + sizeof(e.unix_gid));
	archive_le16enc(&e.unix_uid, archive_entry_uid(entry));
	archive_le16enc(&e.unix_gid, archive_entry_gid(entry));

	archive_le32enc(&d->uncompressed_size, size);

	ret = (a->compressor.write)(a, &h, sizeof(h));
	if (ret != ARCHIVE_OK)
		return (ARCHIVE_FATAL);
	zip->written_bytes += sizeof(h);

	ret = write_path(entry, a);
	if (ret <= ARCHIVE_OK)
		return (ARCHIVE_FATAL);
	zip->written_bytes += ret;

	ret = (a->compressor.write)(a, &e, sizeof(e));
	if (ret != ARCHIVE_OK)
		return (ARCHIVE_FATAL);
	zip->written_bytes += sizeof(e);

	return (ARCHIVE_OK);
}
static int
archive_write_zip_close(struct archive_write *a)
{
	uint8_t buff[64];
	int64_t offset_start, offset_end;
	struct zip *zip = a->format_data;
	struct cd_segment *segment;
	int ret;

	offset_start = zip->written_bytes;
	segment = zip->central_directory;
	while (segment != NULL) {
		ret = __archive_write_output(a,
		    segment->buff, segment->p - segment->buff);
		if (ret != ARCHIVE_OK)
			return (ARCHIVE_FATAL);
		zip->written_bytes += segment->p - segment->buff;
		segment = segment->next;
	}
	offset_end = zip->written_bytes;

	/* If central dir info is too large, write Zip64 end-of-cd */
	if (offset_end - offset_start > ARCHIVE_LITERAL_LL(0xffffffff)
	    || offset_start > ARCHIVE_LITERAL_LL(0xffffffff)
	    || zip->central_directory_entries > 0xffffUL
	    || (zip->flags & ZIP_FLAG_FORCE_ZIP64)) {
	  /* Zip64 end-of-cd record */
	  memset(buff, 0, 56);
	  memcpy(buff, "PK\006\006", 4);
	  archive_le64enc(buff + 4, 44);
	  archive_le16enc(buff + 12, 45);
	  archive_le16enc(buff + 14, 45);
	  /* This is disk 0 of 0. */
	  archive_le64enc(buff + 24, zip->central_directory_entries);
	  archive_le64enc(buff + 32, zip->central_directory_entries);
	  archive_le64enc(buff + 40, offset_end - offset_start);
	  archive_le64enc(buff + 48, offset_start);
	  ret = __archive_write_output(a, buff, 56);
	  if (ret != ARCHIVE_OK)
		  return (ARCHIVE_FATAL);
	  zip->written_bytes += 56;

	  /* Zip64 end-of-cd locator record. */
	  memset(buff, 0, 20);
	  memcpy(buff, "PK\006\007", 4);
	  archive_le32enc(buff + 4, 0);
	  archive_le64enc(buff + 8, offset_end);
	  archive_le32enc(buff + 16, 1);
	  ret = __archive_write_output(a, buff, 20);
	  if (ret != ARCHIVE_OK)
		  return (ARCHIVE_FATAL);
	  zip->written_bytes += 20;

	}

	/* Format and write end of central directory. */
	memset(buff, 0, sizeof(buff));
	memcpy(buff, "PK\005\006", 4);
	archive_le16enc(buff + 8, zipmin(0xffffU, zip->central_directory_entries));
	archive_le16enc(buff + 10, zipmin(0xffffU, zip->central_directory_entries));
	archive_le32enc(buff + 12, (uint32_t)zipmin(ARCHIVE_LITERAL_LL(0xffffffff), (offset_end - offset_start)));
	archive_le32enc(buff + 16, (uint32_t)zipmin(ARCHIVE_LITERAL_LL(0xffffffff), offset_start));
	ret = __archive_write_output(a, buff, 22);
	if (ret != ARCHIVE_OK)
		return (ARCHIVE_FATAL);
	zip->written_bytes += 22;
	return (ARCHIVE_OK);
}
static int
archive_write_zip_finish_entry(struct archive_write *a)
{
	struct zip *zip = a->format_data;
	int ret;

#if HAVE_ZLIB_H
	if (zip->entry_compression == COMPRESSION_DEFLATE) {
		for (;;) {
			size_t remainder;
			ret = deflate(&zip->stream, Z_FINISH);
			if (ret == Z_STREAM_ERROR)
				return (ARCHIVE_FATAL);
			remainder = zip->len_buf - zip->stream.avail_out;
			ret = __archive_write_output(a, zip->buf, remainder);
			if (ret != ARCHIVE_OK)
				return (ret);
			zip->entry_compressed_written += remainder;
			zip->written_bytes += remainder;
			zip->stream.next_out = zip->buf;
			if (zip->stream.avail_out != 0)
				break;
			zip->stream.avail_out = (uInt)zip->len_buf;
		}
		deflateEnd(&zip->stream);
	}
#endif

	/* Write trailing data descriptor. */
	if ((zip->entry_flags & ZIP_ENTRY_FLAG_LENGTH_AT_END) != 0) {
		char d[24];
		memcpy(d, "PK\007\010", 4);
		archive_le32enc(d + 4, zip->entry_crc32);
		if (zip->entry_uses_zip64) {
			archive_le64enc(d + 8, (uint64_t)zip->entry_compressed_written);
			archive_le64enc(d + 16, (uint64_t)zip->entry_uncompressed_written);
			ret = __archive_write_output(a, d, 24);
			zip->written_bytes += 24;
		} else {
			archive_le32enc(d + 8, (uint32_t)zip->entry_compressed_written);
			archive_le32enc(d + 12, (uint32_t)zip->entry_uncompressed_written);
			ret = __archive_write_output(a, d, 16);
			zip->written_bytes += 16;
		}
		if (ret != ARCHIVE_OK)
			return (ARCHIVE_FATAL);
	}

	/* Append Zip64 extra data to central directory information. */
	if (zip->entry_compressed_written > ARCHIVE_LITERAL_LL(0xffffffff)
	    || zip->entry_uncompressed_written > ARCHIVE_LITERAL_LL(0xffffffff)
	    || zip->entry_offset > ARCHIVE_LITERAL_LL(0xffffffff)) {
		unsigned char zip64[32];
		unsigned char *z = zip64, *zd;
		memcpy(z, "\001\000\000\000", 4);
		z += 4;
		if (zip->entry_uncompressed_written >= ARCHIVE_LITERAL_LL(0xffffffff)) {
			archive_le64enc(z, zip->entry_uncompressed_written);
			z += 8;
		}
		if (zip->entry_compressed_written >= ARCHIVE_LITERAL_LL(0xffffffff)) {
			archive_le64enc(z, zip->entry_compressed_written);
			z += 8;
		}
		if (zip->entry_offset >= ARCHIVE_LITERAL_LL(0xffffffff)) {
			archive_le64enc(z, zip->entry_offset);
			z += 8;
		}
		archive_le16enc(zip64 + 2, z - (zip64 + 4));
		zd = cd_alloc(zip, z - zip64);
		if (zd == NULL) {
			archive_set_error(&a->archive, ENOMEM,
				"Can't allocate zip data");
			return (ARCHIVE_FATAL);
		}
		memcpy(zd, zip64, z - zip64);
		/* Zip64 means version needs to be set to at least 4.5 */
		if (archive_le16dec(zip->file_header + 6) < 45)
			archive_le16enc(zip->file_header + 6, 45);
	}

	/* Fix up central directory file header. */
	archive_le32enc(zip->file_header + 16, zip->entry_crc32);
	archive_le32enc(zip->file_header + 20,
	    zipmin(zip->entry_compressed_written, ARCHIVE_LITERAL_LL(0xffffffff)));
	archive_le32enc(zip->file_header + 24,
	    zipmin(zip->entry_uncompressed_written, ARCHIVE_LITERAL_LL(0xffffffff)));
	archive_le16enc(zip->file_header + 30,
	    zip->central_directory_bytes - zip->file_header_extra_offset);
	archive_le32enc(zip->file_header + 42,
	    zipmin(zip->entry_offset, ARCHIVE_LITERAL_LL(0xffffffff)));

	return (ARCHIVE_OK);
}
static int
archive_write_zip_header(struct archive_write *a, struct archive_entry *entry)
{
	unsigned char local_header[32];
	unsigned char local_extra[128];
	struct zip *zip = a->format_data;
	unsigned char *e;
	unsigned char *cd_extra;
	size_t filename_length;
	const char *slink = NULL;
	size_t slink_size = 0;
	struct archive_string_conv *sconv = get_sconv(a, zip);
	int ret, ret2 = ARCHIVE_OK;
	int64_t size;
	mode_t type;
	int version_needed = 10;

	/* Ignore types of entries that we don't support. */
	type = archive_entry_filetype(entry);
	if (type != AE_IFREG && type != AE_IFDIR && type != AE_IFLNK) {
		archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
		    "Filetype not supported");
		return ARCHIVE_FAILED;
	};

	/* If we're not using Zip64, reject large files. */
	if (zip->flags & ZIP_FLAG_AVOID_ZIP64) {
		/* Reject entries over 4GB. */
		if (archive_entry_size_is_set(entry)
		    && (archive_entry_size(entry) > 0xffffffff)) {
			archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
			    "Files > 4GB require Zip64 extensions");
			return ARCHIVE_FAILED;
		}
		/* Reject entries if archive is > 4GB. */
		if (zip->written_bytes > 0xffffffff) {
			archive_set_error(&a->archive, ARCHIVE_ERRNO_MISC,
			    "Archives > 4GB require Zip64 extensions");
			return ARCHIVE_FAILED;
		}
	}

	/* Only regular files can have size > 0. */
	if (type != AE_IFREG)
		archive_entry_set_size(entry, 0);


	/* Reset information from last entry. */
	zip->entry_offset = zip->written_bytes;
	zip->entry_uncompressed_limit = INT64_MAX;
	zip->entry_compressed_size = 0;
	zip->entry_uncompressed_size = 0;
	zip->entry_compressed_written = 0;
	zip->entry_uncompressed_written = 0;
	zip->entry_flags = 0;
	zip->entry_uses_zip64 = 0;
	zip->entry_crc32 = zip->crc32func(0, NULL, 0);
	if (zip->entry != NULL) {
		archive_entry_free(zip->entry);
		zip->entry = NULL;
	}

#if defined(_WIN32) && !defined(__CYGWIN__)
	/* Make sure the path separators in pahtname, hardlink and symlink
	 * are all slash '/', not the Windows path separator '\'. */
	zip->entry = __la_win_entry_in_posix_pathseparator(entry);
	if (zip->entry == entry)
		zip->entry = archive_entry_clone(entry);
#else
	zip->entry = archive_entry_clone(entry);
#endif
	if (zip->entry == NULL) {
		archive_set_error(&a->archive, ENOMEM,
		    "Can't allocate zip header data");
		return (ARCHIVE_FATAL);
	}

	if (sconv != NULL) {
		const char *p;
		size_t len;

		if (archive_entry_pathname_l(entry, &p, &len, sconv) != 0) {
			if (errno == ENOMEM) {
				archive_set_error(&a->archive, ENOMEM,
				    "Can't allocate memory for Pathname");
				return (ARCHIVE_FATAL);
			}
			archive_set_error(&a->archive,
			    ARCHIVE_ERRNO_FILE_FORMAT,
			    "Can't translate Pathname '%s' to %s",
			    archive_entry_pathname(entry),
			    archive_string_conversion_charset_name(sconv));
			ret2 = ARCHIVE_WARN;
		}
		if (len > 0)
			archive_entry_set_pathname(zip->entry, p);

		/*
		 * There is no standard for symlink handling; we convert
		 * it using the same character-set translation that we use
		 * for filename.
		 */
		if (type == AE_IFLNK) {
			if (archive_entry_symlink_l(entry, &p, &len, sconv)) {
				if (errno == ENOMEM) {
					archive_set_error(&a->archive, ENOMEM,
					    "Can't allocate memory "
					    " for Symlink");
					return (ARCHIVE_FATAL);
				}
				/* No error if we can't convert. */
			} else if (len > 0)
				archive_entry_set_symlink(zip->entry, p);
		}
	}

	/* If filename isn't ASCII and we can use UTF-8, set the UTF-8 flag. */
	if (!is_all_ascii(archive_entry_pathname(zip->entry))) {
		if (zip->opt_sconv != NULL) {
			if (strcmp(archive_string_conversion_charset_name(
					zip->opt_sconv), "UTF-8") == 0)
				zip->entry_flags |= ZIP_ENTRY_FLAG_UTF8_NAME;
#if HAVE_NL_LANGINFO
		} else if (strcmp(nl_langinfo(CODESET), "UTF-8") == 0) {
			zip->entry_flags |= ZIP_ENTRY_FLAG_UTF8_NAME;
#endif
		}
	}
	filename_length = path_length(zip->entry);

	/* Determine appropriate compression and size for this entry. */
	if (type == AE_IFLNK) {
		slink = archive_entry_symlink(zip->entry);
		if (slink != NULL)
			slink_size = strlen(slink);
		else
			slink_size = 0;
		zip->entry_uncompressed_limit = slink_size;
		zip->entry_compressed_size = slink_size;
		zip->entry_uncompressed_size = slink_size;
		zip->entry_crc32 = zip->crc32func(zip->entry_crc32,
		    (const unsigned char *)slink, slink_size);
		zip->entry_compression = COMPRESSION_STORE;
		version_needed = 20;
	} else if (type != AE_IFREG) {
		zip->entry_compression = COMPRESSION_STORE;
		zip->entry_uncompressed_limit = 0;
		size = 0;
		version_needed = 20;
	} else if (archive_entry_size_is_set(zip->entry)) {
		size = archive_entry_size(zip->entry);
		zip->entry_uncompressed_limit = size;
		zip->entry_compression = zip->requested_compression;
		if (zip->entry_compression == COMPRESSION_UNSPECIFIED) {
			zip->entry_compression = COMPRESSION_DEFAULT;
		}
		if (zip->entry_compression == COMPRESSION_STORE) {
			zip->entry_compressed_size = size;
			zip->entry_uncompressed_size = size;
			version_needed = 10;
		} else {
			zip->entry_uncompressed_size = size;
			version_needed = 20;
		}
		if ((zip->flags & ZIP_FLAG_FORCE_ZIP64) /* User asked. */
		    || (zip->entry_uncompressed_size > ARCHIVE_LITERAL_LL(0xffffffff))) { /* Large entry. */
			zip->entry_uses_zip64 = 1;
			version_needed = 45;
		}

		/* We may know the size, but never the CRC. */
		zip->entry_flags |= ZIP_ENTRY_FLAG_LENGTH_AT_END;
	} else {
		/* Prefer deflate if it's available, because deflate
		 * has a clear end-of-data marker that makes
		 * length-at-end more reliable. */
		zip->entry_compression = COMPRESSION_DEFAULT;
		zip->entry_flags |= ZIP_ENTRY_FLAG_LENGTH_AT_END;
		if ((zip->flags & ZIP_FLAG_AVOID_ZIP64) == 0) {
			zip->entry_uses_zip64 = 1;
			version_needed = 45;
		} else if (zip->entry_compression == COMPRESSION_STORE) {
			version_needed = 10;
		} else {
			version_needed = 20;
		}
	}

	/* Format the local header. */
	memset(local_header, 0, sizeof(local_header));
	memcpy(local_header, "PK\003\004", 4);
	archive_le16enc(local_header + 4, version_needed);
	archive_le16enc(local_header + 6, zip->entry_flags);
	archive_le16enc(local_header + 8, zip->entry_compression);
	archive_le32enc(local_header + 10, dos_time(archive_entry_mtime(zip->entry)));
	archive_le32enc(local_header + 14, zip->entry_crc32);
	if (zip->entry_uses_zip64) {
		/* Zip64 data in the local header "must" include both
		 * compressed and uncompressed sizes AND those fields
		 * are included only if these are 0xffffffff;
		 * THEREFORE these must be set this way, even if we
		 * know one of them is smaller. */
		archive_le32enc(local_header + 18, ARCHIVE_LITERAL_LL(0xffffffff));
		archive_le32enc(local_header + 22, ARCHIVE_LITERAL_LL(0xffffffff));
	} else {
		archive_le32enc(local_header + 18, zip->entry_compressed_size);
		archive_le32enc(local_header + 22, zip->entry_uncompressed_size);
	}
	archive_le16enc(local_header + 26, filename_length);

	/* Format as much of central directory file header as we can: */
	zip->file_header = cd_alloc(zip, 46);
	/* If (zip->file_header == NULL) XXXX */
	++zip->central_directory_entries;
	memset(zip->file_header, 0, 46);
	memcpy(zip->file_header, "PK\001\002", 4);
	/* "Made by PKZip 2.0 on Unix." */
	archive_le16enc(zip->file_header + 4, 3 * 256 + version_needed);
	archive_le16enc(zip->file_header + 6, version_needed);
	archive_le16enc(zip->file_header + 8, zip->entry_flags);
	archive_le16enc(zip->file_header + 10, zip->entry_compression);
	archive_le32enc(zip->file_header + 12, dos_time(archive_entry_mtime(zip->entry)));
	archive_le16enc(zip->file_header + 28, filename_length);
	/* Following Info-Zip, store mode in the "external attributes" field. */
	archive_le32enc(zip->file_header + 38,
	    ((uint32_t)archive_entry_mode(zip->entry)) << 16);
	e = cd_alloc(zip, filename_length);
	/* If (e == NULL) XXXX */
	copy_path(zip->entry, e);

	/* Format extra data. */
	memset(local_extra, 0, sizeof(local_extra));
	e = local_extra;

	/* First, extra blocks that are the same between
	 * the local file header and the central directory.
	 * We format them once and then duplicate them. */

	/* UT timestamp, length depends on what timestamps are set. */
	memcpy(e, "UT", 2);
	archive_le16enc(e + 2,
	    1
	    + (archive_entry_mtime_is_set(entry) ? 4 : 0)
	    + (archive_entry_atime_is_set(entry) ? 4 : 0)
	    + (archive_entry_ctime_is_set(entry) ? 4 : 0));
	e += 4;
	*e++ =
	    (archive_entry_mtime_is_set(entry) ? 1 : 0)
	    | (archive_entry_atime_is_set(entry) ? 2 : 0)
	    | (archive_entry_ctime_is_set(entry) ? 4 : 0);
	if (archive_entry_mtime_is_set(entry)) {
		archive_le32enc(e, (uint32_t)archive_entry_mtime(entry));
		e += 4;
	}
	if (archive_entry_atime_is_set(entry)) {
		archive_le32enc(e, (uint32_t)archive_entry_atime(entry));
		e += 4;
	}
	if (archive_entry_ctime_is_set(entry)) {
		archive_le32enc(e, (uint32_t)archive_entry_ctime(entry));
		e += 4;
	}

	/* ux Unix extra data, length 11, version 1 */
	/* TODO: If uid < 64k, use 2 bytes, ditto for gid. */
	memcpy(e, "ux\013\000\001", 5);
	e += 5;
	*e++ = 4; /* Length of following UID */
	archive_le32enc(e, (uint32_t)archive_entry_uid(entry));
	e += 4;
	*e++ = 4; /* Length of following GID */
	archive_le32enc(e, (uint32_t)archive_entry_gid(entry));
	e += 4;

	/* Copy UT and ux into central directory as well. */
	zip->file_header_extra_offset = zip->central_directory_bytes;
	cd_extra = cd_alloc(zip, e - local_extra);
	memcpy(cd_extra, local_extra, e - local_extra);

	/*
	 * Following extra blocks vary between local header and
	 * central directory. These are the local header versions.
	 * Central directory versions get formatted in
	 * archive_write_zip_finish_entry() below.
	 */

	/* "[Zip64 entry] in the local header MUST include BOTH
	 * original [uncompressed] and compressed size fields." */
	if (zip->entry_uses_zip64) {
		unsigned char *zip64_start = e;
		memcpy(e, "\001\000\020\000", 4);
		e += 4;
		archive_le64enc(e, zip->entry_uncompressed_size);
		e += 8;
		archive_le64enc(e, zip->entry_compressed_size);
		e += 8;
		archive_le16enc(zip64_start + 2, e - (zip64_start + 4));
	}

	if (zip->flags & ZIP_FLAG_EXPERIMENT_EL) {
		/* Experimental 'el' extension to improve streaming. */
		unsigned char *external_info = e;
		int included = 7;
		memcpy(e, "el\000\000", 4); // 0x6c65 + 2-byte length
		e += 4;
		e[0] = included; /* bitmap of included fields */
		e += 1;
		if (included & 1) {
			archive_le16enc(e, /* "Version created by" */
			    3 * 256 + version_needed);
			e += 2;
		}
		if (included & 2) {
			archive_le16enc(e, 0); /* internal file attributes */
			e += 2;
		}
		if (included & 4) {
			archive_le32enc(e,  /* external file attributes */
			    ((uint32_t)archive_entry_mode(zip->entry)) << 16);
			e += 4;
		}
		if (included & 8) {
			// Libarchive does not currently support file comments.
		}
		archive_le16enc(external_info + 2, e - (external_info + 4));
	}

	/* Update local header with size of extra data and write it all out: */
	archive_le16enc(local_header + 28, e - local_extra);

	ret = __archive_write_output(a, local_header, 30);
	if (ret != ARCHIVE_OK)
		return (ARCHIVE_FATAL);
	zip->written_bytes += 30;

	ret = write_path(zip->entry, a);
	if (ret <= ARCHIVE_OK)
		return (ARCHIVE_FATAL);
	zip->written_bytes += ret;

	ret = __archive_write_output(a, local_extra, e - local_extra);
	if (ret != ARCHIVE_OK)
		return (ARCHIVE_FATAL);
	zip->written_bytes += e - local_extra;

	/* For symlinks, write the body now. */
	if (slink != NULL) {
		ret = __archive_write_output(a, slink, slink_size);
		if (ret != ARCHIVE_OK)
			return (ARCHIVE_FATAL);
		zip->entry_compressed_written += slink_size;
		zip->entry_uncompressed_written += slink_size;
		zip->written_bytes += slink_size;
	}

#ifdef HAVE_ZLIB_H
	if (zip->entry_compression == COMPRESSION_DEFLATE) {
		zip->stream.zalloc = Z_NULL;
		zip->stream.zfree = Z_NULL;
		zip->stream.opaque = Z_NULL;
		zip->stream.next_out = zip->buf;
		zip->stream.avail_out = (uInt)zip->len_buf;
		if (deflateInit2(&zip->stream, Z_DEFAULT_COMPRESSION,
		    Z_DEFLATED, -15, 8, Z_DEFAULT_STRATEGY) != Z_OK) {
			archive_set_error(&a->archive, ENOMEM,
			    "Can't init deflate compressor");
			return (ARCHIVE_FATAL);
		}
	}
#endif

	return (ret2);
}