GETSOCKNAME(2) - man page online | system calls

Get socket name.

GETSOCKNAME(2)                      Linux Programmer's Manual                      GETSOCKNAME(2)

NAME getsockname - get socket name
SYNOPSIS #include <sys/socket.h> int getsockname(int sockfd, struct sockaddr *addr, socklen_t *addrlen);
DESCRIPTION getsockname() returns the current address to which the socket sockfd is bound, in the buf‐ fer pointed to by addr. The addrlen argument should be initialized to indicate the amount of space (in bytes) pointed to by addr. On return it contains the actual size of the socket address. The returned address is truncated if the buffer provided is too small; in this case, addrlen will return a value greater than was supplied to the call.
RETURN VALUE On success, zero is returned. On error, -1 is returned, and errno is set appropriately.
ERRORS EBADF The argument sockfd is not a valid descriptor. EFAULT The addr argument points to memory not in a valid part of the process address space. EINVAL addrlen is invalid (e.g., is negative). ENOBUFS Insufficient resources were available in the system to perform the operation. ENOTSOCK The file descriptor sockfd does not refer to a socket.
CONFORMING TO POSIX.1-2001, POSIX.1-2008, SVr4, 4.4BSD (getsockname() first appeared in 4.2BSD).
NOTES The third argument of getsockname() is in reality an int * (and this is what 4.x BSD and libc4 and libc5 have). Some POSIX confusion resulted in the present socklen_t, also used by glibc. See also accept(2).
SEE ALSO bind(2), socket(2), getifaddrs(3), ip(7), socket(7), unix(7)
COLOPHON This page is part of release 4.04 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at
Linux 2015-12-28 GETSOCKNAME(2)
This manual Reference Other manuals
getsockname(2) referred by accept(2freebsd) | accept4(2freebsd) | atalk(4) | bind(2) | bind(2freebsd) | bindresvport(3) | connect(2) | connect(2freebsd) | explain(1) | explain(3) | explain_getsockname(3) | explain_getsockname_or_die(3) | faith(4freebsd) | getifaddrs(3) | getnameinfo(3) | getpeereid(3) | getpeername(2) | getpeername(2freebsd) | getsockname(1) | getsockname(2freebsd)
refer to accept(2) | bind(2) | getifaddrs(3) | ip(7) | socket(2) | socket(7) | unix(7)