.\" $NetBSD: getsockname.2,v 1.6 1995/10/12 15:41:00 jtc Exp $ .\" .\" Copyright (c) 1983, 1991, 1993 .\" The Regents of the University of California. All rights reserved. .\" .\" Redistribution and use in source and binary forms, with or without .\" modification, are permitted provided that the following conditions .\" are met: .\" 1. Redistributions of source code must retain the above copyright .\" notice, this list of conditions and the following disclaimer. .\" 2. Redistributions in binary form must reproduce the above copyright .\" notice, this list of conditions and the following disclaimer in the .\" documentation and/or other materials provided with the distribution. .\" 3. All advertising materials mentioning features or use of this software .\" must display the following acknowledgement: .\" This product includes software developed by the University of .\" California, Berkeley and its contributors. .\" 4. Neither the name of the University nor the names of its contributors .\" may be used to endorse or promote products derived from this software .\" without specific prior written permission. .\" .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF .\" SUCH DAMAGE. .\" .\" @(#)getsockname.2 8.1 (Berkeley) 6/4/93 .\" .Dd June 4, 1993 .Dt GETSOCKNAME 2 .Os BSD 4.2 .Sh NAME .Nm getsockname .Nd get socket name .Sh SYNOPSIS .Fd #include <sys/socket.h> .Ft int .Fo getsockname .Fa "int socket" .Fa "struct sockaddr *restrict address" .Fa "socklen_t *restrict address_len" .Fc .Sh DESCRIPTION The .Fn getsockname fynction returns the current .Fa address for the specified socket. .Pp The .Fa address_len parameter should be initialized to indicate the amount of space pointed to by .Fa address . On return it contains the actual size of the address returned (in bytes). .Pp The address is truncated if the buffer provided is too small. .Sh RETURN VALUES .Rv -std getsockname .Sh ERRORS The .Fn getsockname system call will succeed unless: .Bl -tag -width Er .\" ========== .It Bq Er EBADF The argument .Fa socket is not a valid file descriptor. .\" ========== .It Bq Er EFAULT The .Fa address parameter points to memory not in a valid part of the process address space. .\" ========== .It Bq Er EINVAL .Fa socket has been shut down. .\" ========== .It Bq Er ENOBUFS Insufficient resources were available in the system to perform the operation. .\" ========== .It Bq Er ENOTSOCK The argument .Fa socket is not a socket (e.g., a plain file). .\" ========== .It Bq Er EOPNOTSUPP .Fn getsockname is not supported for the protocol in use by .Fa socket . .El .Sh SEE ALSO .Xr bind 2 , .Xr socket 2 .Sh BUGS Names bound to sockets in the UNIX domain are inaccessible; .Fn getsockname returns a zero-length address. .Sh HISTORY The .Fn getsockname call appeared in .Bx 4.2 .