getpeername(2) System Calls Manual getpeername(2) getpeername - C (libc, -lc) #include int getpeername(int sockfd, struct sockaddr *restrict addr, socklen_t *restrict addrlen); getpeername() , sockfd, , addr. addrlen , , addr. , ( ). , . , ; addrlen . 0. -1, errno . EBADF sockfd . EFAULT addr . EINVAL addrlen (, ). ENOBUFS . ENOTCONN . ENOTSOCK sockfd . POSIX.1-2024. POSIX.1-2001, SVr4, 4.4BSD ( 4.2BSD). connect(2) getpeername() (peer). , . connect(2) , write(2) recv(2). connect(2) getpeername() ., . , getpeername() ( connect(2)). , , recvfrom(2). accept(2), bind(2), getsockname(2), ip(7), socket(7), unix(7) () Azamat Hackimov , Dmitry Bolkhovskikh , Vladislav , Yuri Kozlov ; GNU (GNU General Public License - GPL, 3 ) , - . - , , () () () . Linux man-pages 6.18 29 2025 . getpeername(2)