Method write

fs/cache/cached_fs.cpp:263–266

    }

    ssize_t write(const void *buf, size_t count) override {
        struct iovec v { const_cast<void *>(buf), count };
        return writev(&v, 1);
    }

    ssize_t writev(const struct iovec *iov, int iovcnt) override {
        auto ret = pwritev(iov, iovcnt, writeOffset_);