Method sendfile

net/pooled_socket.cpp:97–99

                         iovector_view((struct iovec*)iov, iovcnt).sum());
    }
    ssize_t sendfile(int in_fd, off_t offset, size_t count) override {
        FORWARD_SOCK_ACT(less, sendfile(in_fd, offset, count), count);
    }

#undef FORWARD_SOCK_ACT
};