getsockname(2) — Linux manual page

getsockname(2)             System Calls Manual            getsockname(2)

NAME

       getsockname - get socket name

LIBRARY

       Standard C library (libc, -lc)

SYNOPSIS

       #include <sys/socket.h>

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

DESCRIPTION

       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

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

ERRORS

       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

       POSIX.1-2008.

HISTORY

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

SEE ALSO

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

COLOPHON

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Linux man-pages 6.9.1          2024-05-02                 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)

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