getsockname(2) — Linux manual page

getsockname(2)             System Calls Manual             getsockname(2)

NAME         top

       getsockname - get socket name

LIBRARY         top

       Standard C library (libc, -lc)

SYNOPSIS         top

       #include <sys/socket.h>

       int getsockname(int sockfd, struct sockaddr *restrict addr,
                       socklen_t *restrict addrlen);

DESCRIPTION         top

       getsockname() returns the current address to which the socket
       sockfd is bound, in the buffer 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         top

       On success, zero is returned.  On error, -1 is returned, and errno
       is set to indicate the error.

ERRORS         top

       EBADF  The argument sockfd is not a valid file 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.

STANDARDS         top

       POSIX.1-2008.

HISTORY         top

       POSIX.1-2001, SVr4, 4.4BSD (first appeared in 4.2BSD).

SEE ALSO         top

       bind(2), socket(2), getifaddrs(3), ip(7), socket(7), unix(7)

COLOPHON         top

       This page is part of the man-pages (Linux kernel and C library
       user-space interface documentation) project.  Information about
       the project can be found at 
       ⟨https://www.kernel.org/doc/man-pages/⟩.  If you have a bug report
       for this manual page, see
       ⟨https://git.kernel.org/pub/scm/docs/man-pages/man-pages.git/tree/CONTRIBUTING⟩.
       This page was obtained from the tarball man-pages-6.10.tar.gz
       fetched from
       ⟨https://mirrors.edge.kernel.org/pub/linux/docs/man-pages/⟩ on
       2025-02-02.  If you discover any rendering problems in this HTML
       version of the page, or you believe there is a better or more up-
       to-date source for the page, or you have corrections or
       improvements to the information in this COLOPHON (which is not
       part of the original manual page), send a mail to
       man-pages@man7.org

Linux man-pages 6.10            2024-07-23                 getsockname(2)

Pages that refer to this page: bind(2),  connect(2),  getpeername(2),  socket(2),  socketcall(2),  syscalls(2),  bindresvport(3),  getifaddrs(3),  getnameinfo(3),  if_nameindex(3),  sd_is_fifo(3),  sockaddr(3type),  signal-safety(7),  socket(7),  unix(7)

HTML rendering created 2025-02-02 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH.