fs.cprintf(currs.substr(0, 999));
            if (currs.size() > 999)
                currs = currs.substr(999);

            // Break the string at the end of a line, if possible, so
            // that none of the broken string ends up overwritten.
            std::string::size_type bound = currs.rfind(EOL, 999);
            if (bound != endpos)
                bound += strlen(EOL);

                bound = 999;
            fs.cprintf(currs.substr(0, bound));
            if (currs.size() > bound)
                currs = currs.substr(bound);
            else