44     StatusOr<UniqueFd> open(const std::string& pathname, int flags, mode_t mode) const override {  in open()
52     StatusOr<UniqueFd> socket(int domain, int type, int protocol) const override {  in socket()
60     Status getsockname(Fd sock, sockaddr* addr, socklen_t* addrlen) const override {  in getsockname()
69                       socklen_t* optlen) const override {  in getsockopt()
78                       socklen_t optlen) const override {  in setsockopt()
86     Status bind(Fd sock, const sockaddr* addr, socklen_t addrlen) const override {  in bind()
94     Status connect(Fd sock, const sockaddr* addr, socklen_t addrlen) const override {  in connect()
102     StatusOr<ifreq> ioctl(Fd sock, unsigned long request, ifreq* ifr) const override {  in ioctl()
110     StatusOr<UniqueFd> eventfd(unsigned int initval, int flags) const override {  in eventfd()
118     StatusOr<int> ppoll(pollfd* fds, nfds_t nfds, double timeout) const override {  in ppoll()
129     StatusOr<size_t> writev(Fd fd, const std::vector<iovec>& iov) const override {  in writev()  argument
137     StatusOr<size_t> write(Fd fd, const Slice buf) const override {  in write()  argument
145     StatusOr<Slice> read(Fd fd, const Slice buf) const override {  in read()  argument
154                             socklen_t dstlen) const override {  in sendto()
163                              socklen_t* srclen) const override {  in recvfrom()
174     Status shutdown(Fd fd, int how) const override {  in shutdown()
182     Status close(Fd fd) const override {  in close()
190     StatusOr<UniqueFile> fopen(const std::string& path, const std::string& mode) const override {  in fopen()  argument
206     StatusOr<int> vfprintf(FILE* file, const char* format, va_list ap) const override {  in vfprintf()
214     StatusOr<int> vfscanf(FILE* file, const char* format, va_list ap) const override {  in vfscanf()
222     Status fclose(FILE* file) const override {  in fclose()