1.\" Copyright (c) 1983, 1991, 1993 2.\" The Regents of the University of California. All rights reserved. 3.\" 4.\" Redistribution and use in source and binary forms, with or without 5.\" modification, are permitted provided that the following conditions 6.\" are met: 7.\" 1. Redistributions of source code must retain the above copyright 8.\" notice, this list of conditions and the following disclaimer. 9.\" 2. Redistributions in binary form must reproduce the above copyright 10.\" notice, this list of conditions and the following disclaimer in the 11.\" documentation and/or other materials provided with the distribution. 12.\" 3. Neither the name of the University nor the names of its contributors 13.\" may be used to endorse or promote products derived from this software 14.\" without specific prior written permission. 15.\" 16.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 17.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 20.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26.\" SUCH DAMAGE. 27.\" 28.\" @(#)getsockname.2 8.1 (Berkeley) 6/4/93 29.\" $FreeBSD: src/lib/libc/sys/getsockname.2,v 1.9.2.8 2001/12/14 18:34:00 ru Exp $ 30.\" $DragonFly: src/lib/libc/sys/getsockname.2,v 1.5 2007/07/30 22:11:33 swildner Exp $ 31.\" 32.Dd June 4, 1993 33.Dt GETSOCKNAME 2 34.Os 35.Sh NAME 36.Nm getsockname 37.Nd get socket name 38.Sh LIBRARY 39.Lb libc 40.Sh SYNOPSIS 41.In sys/types.h 42.In sys/socket.h 43.Ft int 44.Fn getsockname "int s" "struct sockaddr *name" "socklen_t *namelen" 45.Sh DESCRIPTION 46.Fn Getsockname 47returns the current 48.Fa name 49for the specified socket. The 50.Fa namelen 51parameter should be initialized to indicate 52the amount of space pointed to by 53.Fa name . 54On return it contains the actual size of the name 55returned (in bytes). 56.Sh RETURN VALUES 57.Rv -std getsockname 58.Sh ERRORS 59The call succeeds unless: 60.Bl -tag -width Er 61.It Bq Er EBADF 62The argument 63.Fa s 64is not a valid descriptor. 65.It Bq Er ECONNRESET 66The connection has been reset by the peer. 67.It Bq Er ENOTSOCK 68The argument 69.Fa s 70is a file, not a socket. 71.It Bq Er ENOBUFS 72Insufficient resources were available in the system 73to perform the operation. 74.It Bq Er EFAULT 75The 76.Fa name 77parameter points to memory not in a valid part of the 78process address space. 79.El 80.Sh SEE ALSO 81.Xr bind 2 , 82.Xr getpeername 2 , 83.Xr socket 2 84.Sh HISTORY 85The 86.Fn getsockname 87function call appeared in 88.Bx 4.2 . 89.Sh BUGS 90Names bound to sockets in the 91.Ux 92domain are inaccessible; 93.Nm 94returns a zero length name. 95