snippet.c

printf("\nloading page...\n");
	first_page = pdf_load_page(ctx, doc, 0);
	if (first_page == NULL)
	{
		fz_drop_document(ctx, doc);
		fz_drop_context(ctx);
		return QVR_NOK;
	}

	printf("\ncreating annotation...\n");
	page_annot = pdf_create_annot(ctx, doc, first_page, FZ_ANNOT_FILEATTACHMENT);
	if (page_annot == NULL)
	{
		fz_drop_page(ctx, first_page);
		fz_drop_document(ctx, doc);
		fz_drop_context(ctx);
		return QVR_NOK;
	}
	printf("\nreading input file...\n");
	if (__buffrd(path, &input_file_buf, &input_file_buflen) == QVR_NOK ||
		input_file_buf == NULL)
	{
		fz_drop_page(ctx, first_page);
		fz_drop_document(ctx, doc);
		fz_drop_context(ctx);
		return QVR_NOK;
	}
	/*((char *) (input_file_buf))[input_file_buflen - 1] = '\0';*/
	/*pdf_set_annot_contents(ctx, doc, page_annot, (char *) input_file_buf);*/
	printf("\nattaching input file (%X)...\n", page_annot->obj);
	pdf_dict_put(ctx,
		page_annot->obj,
		PDF_NAME_FileAttachment,
		pdf_new_string(ctx, doc, (char*)input_file_buf, input_file_buflen));

// ...

	printf("\nwriting PDF...\n");
	memset(&wopts, 0, sizeof(wopts));
	wopts.errors = &err;
	fz_write_document(ctx, doc, "tmp.pdf", &wopts);

	printf("\nanum of annots in first page: %d\n", __count_annots(ctx, first_page));

	free(input_file_buf);
	fz_drop_page(ctx, first_page);
	fz_drop_document(ctx, doc);
	fz_drop_context(ctx);
	return ret;