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.\" 30.Dd June 4, 1993 31.Dt GETSOCKNAME 2 32.Os 33.Sh NAME 34.Nm getsockname 35.Nd get socket name 36.Sh LIBRARY 37.Lb libc 38.Sh SYNOPSIS 39.In sys/types.h 40.In sys/socket.h 41.Ft int 42.Fn getsockname "int s" "struct sockaddr * restrict name" "socklen_t * restrict namelen" 43.Sh DESCRIPTION 44The 45.Fn getsockname 46system call 47returns the current 48.Fa name 49for the specified socket. 50The 51.Fa namelen 52argument should be initialized to indicate 53the amount of space pointed to by 54.Fa name . 55On return it contains the actual size of the name 56returned (in bytes). 57.Sh RETURN VALUES 58.Rv -std getsockname 59.Sh ERRORS 60The call succeeds unless: 61.Bl -tag -width Er 62.It Bq Er EBADF 63The argument 64.Fa s 65is not a valid descriptor. 66.It Bq Er ECONNRESET 67The connection has been reset by the peer. 68.It Bq Er EINVAL 69The value of the 70.Fa namelen 71argument is not valid. 72.It Bq Er ENOTSOCK 73The argument 74.Fa s 75is a file, not a socket. 76.It Bq Er ENOBUFS 77Insufficient resources were available in the system 78to perform the operation. 79.It Bq Er EFAULT 80The 81.Fa name 82argument points to memory not in a valid part of the 83process address space. 84.El 85.Sh SEE ALSO 86.Xr bind 2 , 87.Xr getpeername 2 , 88.Xr socket 2 89.Sh HISTORY 90The 91.Fn getsockname 92system call appeared in 93.Bx 4.2 . 94.Sh BUGS 95Names bound to sockets in the UNIX domain are inaccessible; 96.Fn getsockname 97returns a zero length name. 98