GETSOCKNAME(2)            FreeBSD System Calls Manual           GETSOCKNAME(2)

NAME
     getsockname - get socket name

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <sys/types.h>
     #include <sys/socket.h>

     int
     getsockname(int s, struct sockaddr * restrict name,
         socklen_t * restrict namelen);

DESCRIPTION
     The getsockname() system call returns the current name for the specified
     socket.  The namelen argument should be initialized to indicate the
     amount of space pointed to by name.  On return it contains the actual
     size of the name returned (in bytes).

RETURN VALUES
     The getsockname() function returns the value 0 if successful; otherwise
     the value -1 is returned and the global variable errno is set to indicate
     the error.

ERRORS
     The call succeeds unless:

     [EBADF]            The argument s is not a valid descriptor.

     [ECONNRESET]       The connection has been reset by the peer.

     [EINVAL]           The value of the namelen argument is not valid.

     [ENOTSOCK]         The argument s is a file, not a socket.

     [ENOBUFS]          Insufficient resources were available in the system to
                        perform the operation.

     [EFAULT]           The name argument points to memory not in a valid part
                        of the process address space.

SEE ALSO
     bind(2), getpeername(2), socket(2)

HISTORY
     The getsockname() system call appeared in 4.2BSD.

BUGS
     Names bound to sockets in the UNIX domain are inaccessible; getsockname()
     returns a zero length name.

FreeBSD 13.1-RELEASE-p6          June 4, 1993          FreeBSD 13.1-RELEASE-p6