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. All advertising materials mentioning features or use of this software 13.\" must display the following acknowledgement: 14.\" This product includes software developed by the University of 15.\" California, Berkeley and its contributors. 16.\" 4. Neither the name of the University nor the names of its contributors 17.\" may be used to endorse or promote products derived from this software 18.\" without specific prior written permission. 19.\" 20.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30.\" SUCH DAMAGE. 31.\" 32.\" @(#)getpeername.2 8.1 (Berkeley) 6/4/93 33.\" $FreeBSD: src/lib/libc/sys/getpeername.2,v 1.9.2.8 2001/12/14 18:34:00 ru Exp $ 34.\" $DragonFly: src/lib/libc/sys/getpeername.2,v 1.2 2003/06/17 04:26:47 dillon Exp $ 35.\" 36.Dd June 4, 1993 37.Dt GETPEERNAME 2 38.Os 39.Sh NAME 40.Nm getpeername 41.Nd get name of connected peer 42.Sh LIBRARY 43.Lb libc 44.Sh SYNOPSIS 45.In sys/types.h 46.In sys/socket.h 47.Ft int 48.Fn getpeername "int s" "struct sockaddr *name" "socklen_t *namelen" 49.Sh DESCRIPTION 50.Fn Getpeername 51returns the name of the peer connected to 52socket 53.Fa s . 54The 55.Fa namelen 56parameter should be initialized to indicate 57the amount of space pointed to by 58.Fa name . 59On return it contains the actual size of the name 60returned (in bytes). 61The name is truncated if the buffer provided is too small. 62.Sh RETURN VALUES 63.Rv -std getpeername 64.Sh ERRORS 65The call succeeds unless: 66.Bl -tag -width Er 67.It Bq Er EBADF 68The argument 69.Fa s 70is not a valid descriptor. 71.It Bq Er ECONNRESET 72The connection has been reset by the peer. 73.It Bq Er ENOTSOCK 74The argument 75.Fa s 76is a file, not a socket. 77.It Bq Er ENOTCONN 78The socket is not connected. 79.It Bq Er ENOBUFS 80Insufficient resources were available in the system 81to perform the operation. 82.It Bq Er EFAULT 83The 84.Fa name 85parameter points to memory not in a valid part of the 86process address space. 87.El 88.Sh SEE ALSO 89.Xr accept 2 , 90.Xr bind 2 , 91.Xr getsockname 2 , 92.Xr socket 2 93.Sh HISTORY 94The 95.Fn getpeername 96function call appeared in 97.Bx 4.2 . 98