1.\" Copyright (c) 1983, 1991 The Regents of the University of California. 2.\" 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 6.5 (Berkeley) 3/10/91 33.\" 34.Dd March 10, 1991 35.Dt GETPEERNAME 2 36.Os BSD 4.2 37.Sh NAME 38.Nm getpeername 39.Nd get name of connected peer 40.Sh SYNOPSIS 41.Ft int 42.Fn getpeername "int s" "struct sockaddr *name" "int *namelen" 43.Sh DESCRIPTION 44.Fn Getpeername 45returns the name of the peer connected to 46socket 47.Fa s . 48The 49.Fa namelen 50parameter should be initialized to indicate 51the amount of space pointed to by 52.Fa name . 53On return it contains the actual size of the name 54returned (in bytes). 55The name is truncated if the buffer provided is too small. 56.Sh DIAGNOSTICS 57A 0 is returned if the call succeeds, -1 if it fails. 58.Sh ERRORS 59The call succeeds unless: 60.Bl -tag -width ENOTSOCKAA 61.It Bq Er EBADF 62The argument 63.Fa s 64is not a valid descriptor. 65.It Bq Er ENOTSOCK 66The argument 67.Fa s 68is a file, not a socket. 69.It Bq Er ENOTCONN 70The socket is not connected. 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 accept 2 , 82.Xr bind 2 , 83.Xr socket 2 , 84.Xr getsockname 2 85.Sh HISTORY 86The 87.Nm 88function call appeared in 89.Bx 4.2 . 90