Esempio n. 1
0
static void test_compress_file(const char *in_path, const char *out_path)
{
	const struct compression_handler *handler;
	struct istream *input, *file_input;
	struct ostream *output, *file_output;
	int fd_in, fd_out;
	struct sha1_ctxt sha1;
	unsigned char output_sha1[SHA1_RESULTLEN], input_sha1[SHA1_RESULTLEN];
	const unsigned char *data;
	size_t size;
	ssize_t ret;

	handler = compression_lookup_handler_from_ext(out_path);
	if (handler == NULL)
		i_fatal("Can't detect compression algorithm from path %s", out_path);
	if (handler->create_ostream == NULL)
		i_fatal("Support not compiled in for %s", handler->name);

	/* write the compressed output file */
	fd_in = open(in_path, O_RDONLY);
	if (fd_in == -1)
		i_fatal("open(%s) failed: %m", in_path);
	fd_out = open(out_path, O_TRUNC | O_CREAT | O_RDWR, 0600);
	if (fd_out == -1)
		i_fatal("creat(%s) failed: %m", out_path);

	sha1_init(&sha1);
	file_output = o_stream_create_fd_file(fd_out, 0, FALSE);
	output = handler->create_ostream(file_output, 1);
	input = i_stream_create_fd_autoclose(&fd_in, IO_BLOCK_SIZE);
	while (i_stream_read_data(input, &data, &size, 0) > 0) {
		sha1_loop(&sha1, data, size);
		o_stream_nsend(output, data, size);
		i_stream_skip(input, size);
	}
	if (o_stream_nfinish(output) < 0) {
		i_fatal("write(%s) failed: %s",
			out_path, o_stream_get_error(output));
	}
	i_stream_destroy(&input);
	o_stream_destroy(&output);
	o_stream_destroy(&file_output);
	sha1_result(&sha1, output_sha1);

	/* verify that we can read the compressed file */
	sha1_init(&sha1);
	file_input = i_stream_create_fd(fd_out, IO_BLOCK_SIZE, FALSE);
	input = handler->create_istream(file_input, FALSE);
	while ((ret = i_stream_read_data(input, &data, &size, 0)) > 0) {
		sha1_loop(&sha1, data, size);
		i_stream_skip(input, size);
	}
	i_stream_destroy(&input);
	i_stream_destroy(&file_input);
	sha1_result(&sha1, input_sha1);

	if (memcmp(input_sha1, output_sha1, sizeof(input_sha1)) != 0)
		i_fatal("Decompression couldn't get the original input");
	i_close_fd(&fd_out);
}
Esempio n. 2
0
int maildir_save_begin(struct mail_save_context *_ctx, struct istream *input)
{
	struct maildir_save_context *ctx = (struct maildir_save_context *)_ctx;
	struct maildir_filename *mf;

	/* new mail, new failure state */
	ctx->failed = FALSE;

	T_BEGIN {
		/* create a new file in tmp/ directory */
		const char *fname;

		ctx->fd = maildir_create_tmp(ctx->mbox, ctx->tmpdir, &fname);
		if (ctx->fd == -1)
			ctx->failed = TRUE;
		else {
			if (ctx->mbox->storage->storage.set->mail_save_crlf)
				ctx->input = i_stream_create_crlf(input);
			else
				ctx->input = i_stream_create_lf(input);
			mf = maildir_save_add(_ctx, fname, NULL);
			if (_ctx->data.guid != NULL) {
				maildir_save_set_dest_basename(_ctx, mf,
							       _ctx->data.guid);
			}
		}
	} T_END;

	if (!ctx->failed) {
		_ctx->data.output = o_stream_create_fd_file(ctx->fd, 0, FALSE);
		o_stream_cork(_ctx->data.output);
		ctx->last_save_finished = FALSE;
	}
	return ctx->failed ? -1 : 0;
}
Esempio n. 3
0
static int mail_index_recreate(struct mail_index *index)
{
	struct mail_index_map *map = index->map;
	struct ostream *output;
	unsigned int base_size;
	const char *path;
	int ret = 0, fd;

	i_assert(!MAIL_INDEX_IS_IN_MEMORY(index));
	i_assert(map->hdr.indexid == index->indexid);
	i_assert((map->hdr.flags & MAIL_INDEX_HDR_FLAG_CORRUPTED) == 0);
	i_assert(index->indexid != 0);

	fd = mail_index_create_tmp_file(index, index->filepath, &path);
	if (fd == -1)
		return -1;

	output = o_stream_create_fd_file(fd, 0, FALSE);
	o_stream_cork(output);

	base_size = I_MIN(map->hdr.base_header_size, sizeof(map->hdr));
	o_stream_nsend(output, &map->hdr, base_size);
	o_stream_nsend(output, CONST_PTR_OFFSET(map->hdr_base, base_size),
		       map->hdr.header_size - base_size);
	o_stream_nsend(output, map->rec_map->records,
		       map->rec_map->records_count * map->hdr.record_size);
	o_stream_nflush(output);
	if (o_stream_nfinish(output) < 0) {
		mail_index_file_set_syscall_error(index, path, "write()");
		ret = -1;
	}
	o_stream_destroy(&output);

	if (ret == 0 && index->fsync_mode != FSYNC_MODE_NEVER) {
		if (fdatasync(fd) < 0) {
			mail_index_file_set_syscall_error(index, path,
							  "fdatasync()");
			ret = -1;
		}
	}

	if (close(fd) < 0) {
		mail_index_file_set_syscall_error(index, path, "close()");
		ret = -1;
	}

	if ((index->flags & MAIL_INDEX_OPEN_FLAG_KEEP_BACKUPS) != 0)
		(void)mail_index_create_backup(index);

	if (ret == 0 && rename(path, index->filepath) < 0) {
		mail_index_set_error(index, "rename(%s, %s) failed: %m",
				     path, index->filepath);
		ret = -1;
	}

	if (ret < 0)
		i_unlink(path);
	return ret;
}
Esempio n. 4
0
int mbox_move(struct mbox_sync_context *sync_ctx,
	      uoff_t dest, uoff_t source, uoff_t size)
{
	struct istream *input;
	struct ostream *output;
	off_t ret;

	i_assert(size < OFF_T_MAX);

	if (size == 0 || source == dest)
		return 0;

	i_stream_sync(sync_ctx->input);

	output = o_stream_create_fd_file(sync_ctx->write_fd, (uoff_t)-1, FALSE);
	i_stream_seek(sync_ctx->file_input, source);
	if (o_stream_seek(output, dest) < 0) {
		mbox_set_syscall_error(sync_ctx->mbox,
				       "o_stream_seek()");
		o_stream_unref(&output);
		return -1;
	}

	input = i_stream_create_limit(sync_ctx->file_input, size);
	ret = o_stream_send_istream(output, input);
	i_stream_unref(&input);

        if (ret == (off_t)size)
		ret = 0;
	else if (ret >= 0) {
		mbox_sync_set_critical(sync_ctx,
			"mbox_move(%"PRIuUOFF_T", %"PRIuUOFF_T", %"PRIuUOFF_T
			") moved only %"PRIuUOFF_T" bytes",
			dest, source, size, (uoff_t)ret);
		ret = -1;
	} else if (ret < 0) {
		errno = output->stream_errno;
		mbox_set_syscall_error(sync_ctx->mbox,
				       "o_stream_send_istream()");
	}

	mbox_sync_file_updated(sync_ctx, FALSE);
	o_stream_destroy(&output);
	return (int)ret;
}
static int astream_decode_base64(struct attachment_istream *astream)
{
	struct attachment_istream_part *part = &astream->part;
	buffer_t *extra_buf = NULL;
	struct istream *input, *base64_input;
	struct ostream *output;
	const unsigned char *data;
	size_t size;
	ssize_t ret;
	buffer_t *buf;
	int outfd;
	bool failed = FALSE;

	if (part->base64_bytes < astream->set.min_size ||
	    part->temp_output->offset > part->base64_bytes +
	    				BASE64_ATTACHMENT_MAX_EXTRA_BYTES) {
		/* only a small part of the MIME part is base64-encoded. */
		return -1;
	}

	if (part->base64_line_blocks == 0) {
		/* only one line of base64 */
		part->base64_line_blocks = part->cur_base64_blocks;
		i_assert(part->base64_line_blocks > 0);
	}

	/* decode base64 data and write it to another temp file */
	outfd = astream->set.open_temp_fd(astream->context);
	if (outfd == -1)
		return -1;

	buf = buffer_create_dynamic(default_pool, 1024);
	input = i_stream_create_fd(part->temp_fd, IO_BLOCK_SIZE);
	base64_input = i_stream_create_limit(input, part->base64_bytes);
	output = o_stream_create_fd_file(outfd, 0, FALSE);
	o_stream_cork(output);

	hash_format_reset(astream->set.hash_format);
	size_t bytes_needed = 1;
	while ((ret = i_stream_read_bytes(base64_input, &data, &size,
					  bytes_needed)) > 0) {
		buffer_set_used_size(buf, 0);
		if (base64_decode(data, size, &size, buf) < 0) {
			i_error("istream-attachment: BUG: "
				"Attachment base64 data unexpectedly broke");
			failed = TRUE;
			break;
		}
		i_stream_skip(base64_input, size);
		o_stream_nsend(output, buf->data, buf->used);
		hash_format_loop(astream->set.hash_format,
				 buf->data, buf->used);
		bytes_needed = i_stream_get_data_size(base64_input) + 1;
	}
	if (ret != -1) {
		i_assert(failed);
	} else if (base64_input->stream_errno != 0) {
		i_error("istream-attachment: read(%s) failed: %s",
			i_stream_get_name(base64_input),
			i_stream_get_error(base64_input));
		failed = TRUE;
	}
	if (o_stream_nfinish(output) < 0) {
		i_error("istream-attachment: write(%s) failed: %s",
			o_stream_get_name(output), o_stream_get_error(output));
		failed = TRUE;
	}

	buffer_free(&buf);
	i_stream_unref(&base64_input);
	o_stream_unref(&output);

	if (input->v_offset != part->temp_output->offset && !failed) {
		/* write the rest of the data to the message stream */
		extra_buf = buffer_create_dynamic(default_pool, 1024);
		while ((ret = i_stream_read_more(input, &data, &size)) > 0) {
			buffer_append(extra_buf, data, size);
			i_stream_skip(input, size);
		}
		i_assert(ret == -1);
		if (input->stream_errno != 0) {
			i_error("istream-attachment: read(%s) failed: %s",
				i_stream_get_name(input),
				i_stream_get_error(input));
			failed = TRUE;
		}
	}
	i_stream_unref(&input);

	if (failed) {
		i_close_fd(&outfd);
		return -1;
	}

	/* successfully wrote it. switch to using it. */
	o_stream_destroy(&part->temp_output);
	i_close_fd(&part->temp_fd);
	part->temp_fd = outfd;

	if (extra_buf != NULL) {
		stream_add_data(astream, extra_buf->data, extra_buf->used);
		buffer_free(&extra_buf);
	}
	return 0;
}
Esempio n. 6
0
static int
mbox_save_init_file(struct mbox_save_context *ctx,
		    struct mbox_transaction_context *t, bool want_mail)
{
	struct mailbox_transaction_context *_t = &t->ictx.mailbox_ctx;
	struct mbox_mailbox *mbox = ctx->mbox;
	struct mail_storage *storage = &mbox->storage->storage;
	bool empty = FALSE;
	int ret;

	if (ctx->mbox->box.backend_readonly) {
		mail_storage_set_error(storage, MAIL_ERROR_PERM,
				       "Read-only mbox");
		return -1;
	}

	if ((_t->flags & MAILBOX_TRANSACTION_FLAG_ASSIGN_UIDS) != 0 ||
	    ctx->ctx.uid != 0)
		want_mail = TRUE;

	if (ctx->append_offset == (uoff_t)-1) {
		/* first appended mail in this transaction */
		if (mbox->mbox_lock_type != F_WRLCK) {
			if (mbox->mbox_lock_type == F_RDLCK) {
				/* FIXME: we shouldn't fail here. it's just
				   a locking issue that should be possible to
				   fix.. */
				mail_storage_set_error(storage,
					MAIL_ERROR_NOTPOSSIBLE,
					"Can't copy mails inside same mailbox");
				return -1;
			}
			if (mbox_lock(mbox, F_WRLCK, &t->mbox_lock_id) <= 0)
				return -1;
		}

		if (mbox->mbox_fd == -1) {
			if (mbox_file_open(mbox) < 0)
				return -1;
		}

		/* update mbox_sync_dirty state */
		ret = mbox_sync_has_changed_full(mbox, TRUE, &empty);
		if (ret < 0)
			return -1;
		if (!want_mail && ret == 0) {
			/* we're not required to assign UIDs for the appended
			   mails immediately. do it only if it doesn't require
			   syncing. */
			mbox_save_init_sync(_t);
		}
	}

	if (!ctx->synced && (want_mail || empty)) {
		/* we'll need to assign UID for the mail immediately. */
		if (mbox_sync(mbox, 0) < 0)
			return -1;
		mbox_save_init_sync(_t);
	}

	/* the syncing above could have changed the append offset */
	if (ctx->append_offset == (uoff_t)-1) {
		if (mbox_seek_to_end(ctx, &ctx->append_offset) < 0)
			return -1;

		ctx->output = o_stream_create_fd_file(mbox->mbox_fd,
						      ctx->append_offset,
						      FALSE);
		o_stream_cork(ctx->output);
	}
	return 0;
}
Esempio n. 7
0
int subsfile_set_subscribed(struct mailbox_list *list, const char *path,
			    const char *temp_prefix, const char *name,
			    bool set)
{
	const struct mail_storage_settings *mail_set = list->mail_set;
	struct dotlock_settings dotlock_set;
	struct dotlock *dotlock;
	struct mailbox_permissions perm;
	const char *line, *dir, *fname, *escaped_name;
	struct istream *input = NULL;
	struct ostream *output;
	int fd_in, fd_out;
	enum mailbox_list_path_type type;
	bool found, changed = FALSE, failed = FALSE;
	unsigned int version = 2;

	if (strcasecmp(name, "INBOX") == 0)
		name = "INBOX";

	memset(&dotlock_set, 0, sizeof(dotlock_set));
	dotlock_set.use_excl_lock = mail_set->dotlock_use_excl;
	dotlock_set.nfs_flush = mail_set->mail_nfs_storage;
	dotlock_set.temp_prefix = temp_prefix;
	dotlock_set.timeout = SUBSCRIPTION_FILE_LOCK_TIMEOUT;
	dotlock_set.stale_timeout = SUBSCRIPTION_FILE_CHANGE_TIMEOUT;

	mailbox_list_get_root_permissions(list, &perm);
	fd_out = file_dotlock_open_group(&dotlock_set, path, 0,
					 perm.file_create_mode,
					 perm.file_create_gid,
					 perm.file_create_gid_origin, &dotlock);
	if (fd_out == -1 && errno == ENOENT) {
		/* directory hasn't been created yet. */
		type = list->set.control_dir != NULL ?
			MAILBOX_LIST_PATH_TYPE_CONTROL :
			MAILBOX_LIST_PATH_TYPE_DIR;
		fname = strrchr(path, '/');
		if (fname != NULL) {
			dir = t_strdup_until(path, fname);
			if (mailbox_list_mkdir_root(list, dir, type) < 0)
				return -1;
		}
		fd_out = file_dotlock_open_group(&dotlock_set, path, 0,
						 perm.file_create_mode,
						 perm.file_create_gid,
						 perm.file_create_gid_origin,
						 &dotlock);
	}
	if (fd_out == -1) {
		if (errno == EAGAIN) {
			mailbox_list_set_error(list, MAIL_ERROR_TEMP,
				"Timeout waiting for subscription file lock");
		} else {
			subswrite_set_syscall_error(list, "file_dotlock_open()",
						    path);
		}
		return -1;
	}

	fd_in = nfs_safe_open(path, O_RDONLY);
	if (fd_in == -1 && errno != ENOENT) {
		subswrite_set_syscall_error(list, "open()", path);
		file_dotlock_delete(&dotlock);
		return -1;
	}
	if (fd_in != -1) {
		input = i_stream_create_fd_autoclose(&fd_in, list->mailbox_name_max_length+1);
		i_stream_set_return_partial_line(input, TRUE);
		subsfile_list_read_header(list, input, &version);
	}

	found = FALSE;
	output = o_stream_create_fd_file(fd_out, 0, FALSE);
	o_stream_cork(output);
	if (version >= 2)
		o_stream_send_str(output, version2_header);
	if (version < 2 || name[0] == '\0')
		escaped_name = name;
	else {
		const char *const *tmp;
		char separators[2];
		string_t *str = t_str_new(64);

		separators[0] = mailbox_list_get_hierarchy_sep(list);
		separators[1] = '\0';
		tmp = t_strsplit(name, separators);
		str_append_tabescaped(str, *tmp);
		for (tmp++; *tmp != NULL; tmp++) {
			str_append_c(str, '\t');
			str_append_tabescaped(str, *tmp);
		}
		escaped_name = str_c(str);
	}
	if (input != NULL) {
		while ((line = next_line(list, path, input,
					 &failed, FALSE)) != NULL) {
			if (strcmp(line, escaped_name) == 0) {
				found = TRUE;
				if (!set) {
					changed = TRUE;
					continue;
				}
			}

			o_stream_nsend_str(output, line);
			o_stream_nsend(output, "\n", 1);
		}
		i_stream_destroy(&input);
	}

	if (!failed && set && !found) {
		/* append subscription */
		line = t_strconcat(escaped_name, "\n", NULL);
		o_stream_nsend_str(output, line);
		changed = TRUE;
	}

	if (changed && !failed) {
		if (o_stream_nfinish(output) < 0) {
			subswrite_set_syscall_error(list, "write()", path);
			failed = TRUE;
		} else if (mail_set->parsed_fsync_mode != FSYNC_MODE_NEVER) {
			if (fsync(fd_out) < 0) {
				subswrite_set_syscall_error(list, "fsync()",
							    path);
				failed = TRUE;
			}
		}
	} else {
		o_stream_ignore_last_errors(output);
	}
	o_stream_destroy(&output);

	if (failed || !changed) {
		if (file_dotlock_delete(&dotlock) < 0) {
			subswrite_set_syscall_error(list,
				"file_dotlock_delete()", path);
			failed = TRUE;
		}
	} else {
		enum dotlock_replace_flags flags =
			DOTLOCK_REPLACE_FLAG_VERIFY_OWNER;
		if (file_dotlock_replace(&dotlock, flags) < 0) {
			subswrite_set_syscall_error(list,
				"file_dotlock_replace()", path);
			failed = TRUE;
		}
	}
	return failed ? -1 : (changed ? 1 : 0);
}
Esempio n. 8
0
static void test_compression_handler(const struct compression_handler *handler)
{
	const char *path = "test-compression.tmp";
	struct istream *file_input, *input;
	struct ostream *file_output, *output;
	unsigned char buf[IO_BLOCK_SIZE];
	const unsigned char *data;
	size_t size;
	struct sha1_ctxt sha1;
	unsigned char output_sha1[SHA1_RESULTLEN], input_sha1[SHA1_RESULTLEN];
	unsigned int i;
	int fd;
	ssize_t ret;

	test_begin(t_strdup_printf("compression handler %s", handler->name));

	/* write compressed data */
	fd = open(path, O_TRUNC | O_CREAT | O_RDWR, 0600);
	if (fd == -1)
		i_fatal("creat(%s) failed: %m", path);
	file_output = o_stream_create_fd_file(fd, 0, FALSE);
	output = handler->create_ostream(file_output, 1);
	sha1_init(&sha1);

	/* 1) write lots of easily compressible data */
	memset(buf, 0, sizeof(buf));
	for (i = 0; i < 1024*1024*4 / sizeof(buf); i++) {
		sha1_loop(&sha1, buf, sizeof(buf));
		test_assert(o_stream_send(output, buf, sizeof(buf)) == sizeof(buf));
	}

	/* 2) write uncompressible data */
	for (i = 0; i < 1024*128 / sizeof(buf); i++) {
		random_fill_weak(buf, sizeof(buf));
		sha1_loop(&sha1, buf, sizeof(buf));
		test_assert(o_stream_send(output, buf, sizeof(buf)) == sizeof(buf));
	}

	/* 3) write semi-compressible data */
	for (i = 0; i < sizeof(buf); i++) {
		if (rand () % 3 == 0)
			buf[i] = rand() % 4;
		else
			buf[i] = i;
	}
	for (i = 0; i < 1024*128 / sizeof(buf); i++) {
		sha1_loop(&sha1, buf, sizeof(buf));
		test_assert(o_stream_send(output, buf, sizeof(buf)) == sizeof(buf));
	}

	o_stream_destroy(&output);
	o_stream_destroy(&file_output);
	sha1_result(&sha1, output_sha1);

	/* read and uncompress the data */
	sha1_init(&sha1);
	file_input = i_stream_create_fd(fd, IO_BLOCK_SIZE, FALSE);
	input = handler->create_istream(file_input, FALSE);
	while ((ret = i_stream_read_data(input, &data, &size, 0)) > 0) {
		sha1_loop(&sha1, data, size);
		i_stream_skip(input, size);
	}
	test_assert(ret == -1);
	i_stream_destroy(&input);
	i_stream_destroy(&file_input);
	sha1_result(&sha1, input_sha1);

	test_assert(memcmp(input_sha1, output_sha1, sizeof(input_sha1)) == 0);
	if (unlink(path) < 0)
		i_error("unlink(%s) failed: %m", path);

	test_end();
}
Esempio n. 9
0
int subsfile_set_subscribed(struct mailbox_list *list, const char *path,
			    const char *temp_prefix, const char *name, bool set)
{
	const struct mail_storage_settings *mail_set = list->mail_set;
	struct dotlock_settings dotlock_set;
	struct dotlock *dotlock;
	const char *line, *origin;
	struct istream *input;
	struct ostream *output;
	int fd_in, fd_out;
	mode_t mode;
	gid_t gid;
	bool found, changed = FALSE, failed = FALSE;

	if (strcasecmp(name, "INBOX") == 0)
		name = "INBOX";

	memset(&dotlock_set, 0, sizeof(dotlock_set));
	dotlock_set.use_excl_lock = mail_set->dotlock_use_excl;
	dotlock_set.nfs_flush = mail_set->mail_nfs_storage;
	dotlock_set.temp_prefix = temp_prefix;
	dotlock_set.timeout = SUBSCRIPTION_FILE_LOCK_TIMEOUT;
	dotlock_set.stale_timeout = SUBSCRIPTION_FILE_CHANGE_TIMEOUT;

	mailbox_list_get_permissions(list, NULL, &mode, &gid, &origin);
	fd_out = file_dotlock_open_group(&dotlock_set, path, 0,
					 mode, gid, origin, &dotlock);
	if (fd_out == -1 && errno == ENOENT) {
		/* directory hasn't been created yet. */
		if (mailbox_list_create_parent_dir(list, NULL, path) < 0)
			return -1;
		fd_out = file_dotlock_open_group(&dotlock_set, path, 0,
						 mode, gid, origin, &dotlock);
	}
	if (fd_out == -1) {
		if (errno == EAGAIN) {
			mailbox_list_set_error(list, MAIL_ERROR_TEMP,
				"Timeout waiting for subscription file lock");
		} else {
			subswrite_set_syscall_error(list, "file_dotlock_open()",
						    path);
		}
		return -1;
	}

	fd_in = nfs_safe_open(path, O_RDONLY);
	if (fd_in == -1 && errno != ENOENT) {
		subswrite_set_syscall_error(list, "open()", path);
		(void)file_dotlock_delete(&dotlock);
		return -1;
	}

	input = fd_in == -1 ? NULL :
		i_stream_create_fd(fd_in, list->mailbox_name_max_length+1,
				   TRUE);
	output = o_stream_create_fd_file(fd_out, 0, FALSE);
	o_stream_cork(output);
	found = FALSE;
	while ((line = next_line(list, path, input,
				 &failed, FALSE)) != NULL) {
		if (strcmp(line, name) == 0) {
			found = TRUE;
			if (!set) {
				changed = TRUE;
				continue;
			}
		}

		(void)o_stream_send_str(output, line);
		(void)o_stream_send(output, "\n", 1);
	}

	if (!failed && set && !found) {
		/* append subscription */
		line = t_strconcat(name, "\n", NULL);
		(void)o_stream_send_str(output, line);
		changed = TRUE;
	}

	if (changed && !failed) {
		if (o_stream_flush(output) < 0) {
			subswrite_set_syscall_error(list, "write()", path);
			failed = TRUE;
		} else if (mail_set->parsed_fsync_mode != FSYNC_MODE_NEVER) {
			if (fsync(fd_out) < 0) {
				subswrite_set_syscall_error(list, "fsync()",
							    path);
				failed = TRUE;
			}
		}
	}

	if (input != NULL)
		i_stream_destroy(&input);
	o_stream_destroy(&output);

	if (failed || !changed) {
		if (file_dotlock_delete(&dotlock) < 0) {
			subswrite_set_syscall_error(list,
				"file_dotlock_delete()", path);
			failed = TRUE;
		}
	} else {
		enum dotlock_replace_flags flags =
			DOTLOCK_REPLACE_FLAG_VERIFY_OWNER;
		if (file_dotlock_replace(&dotlock, flags) < 0) {
			subswrite_set_syscall_error(list,
				"file_dotlock_replace()", path);
			failed = TRUE;
		}
	}
	return failed ? -1 : (changed ? 1 : 0);
}
Esempio n. 10
0
int dbox_file_fix(struct dbox_file *file, uoff_t start_offset)
{
	struct ostream *output;
	const char *dir, *p, *temp_path, *broken_path;
	bool deleted;
	int fd, ret;

	i_assert(dbox_file_is_open(file));

	p = strrchr(file->cur_path, '/');
	i_assert(p != NULL);
	dir = t_strdup_until(file->cur_path, p);

	temp_path = t_strdup_printf("%s/%s", dir, dbox_generate_tmp_filename());
	fd = file->storage->v.file_create_fd(file, temp_path, FALSE);
	if (fd == -1)
		return -1;

	output = o_stream_create_fd_file(fd, 0, FALSE);
	ret = dbox_file_fix_write_stream(file, start_offset, temp_path, output);
	o_stream_unref(&output);
	if (close(fd) < 0) {
		mail_storage_set_critical(&file->storage->storage,
					  "close(%s) failed: %m", temp_path);
		ret = -1;
	}
	if (ret < 0) {
		if (unlink(temp_path) < 0) {
			mail_storage_set_critical(&file->storage->storage,
				"unlink(%s) failed: %m", temp_path);
		}
		return -1;
	}
	/* keep a copy of the original file in case someone wants to look
	   at it */
	broken_path = t_strconcat(file->cur_path,
				  DBOX_MAIL_FILE_BROKEN_COPY_SUFFIX, NULL);
	if (link(file->cur_path, broken_path) < 0) {
		mail_storage_set_critical(&file->storage->storage,
					  "link(%s, %s) failed: %m",
					  file->cur_path, broken_path);
	} else {
		i_warning("dbox: Copy of the broken file saved to %s",
			  broken_path);
	}
	if (rename(temp_path, file->cur_path) < 0) {
		mail_storage_set_critical(&file->storage->storage,
					  "rename(%s, %s) failed: %m",
					  temp_path, file->cur_path);
		return -1;
	}

	/* file was successfully recreated - reopen it */
	dbox_file_close(file);
	if (dbox_file_open(file, &deleted) <= 0) {
		mail_storage_set_critical(&file->storage->storage,
			"dbox_file_fix(%s): reopening file failed",
			file->cur_path);
		return -1;
	}
	return 0;
}