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	1	.\" $NetBSD: getsockname.2,v 1.6 1995/10/12 15:41:00 jtc Exp $
	2	.\"
	3	.\" Copyright (c) 1983, 1991, 1993
	4	.\" The Regents of the University of California. All rights reserved.
	5	.\"
	6	.\" Redistribution and use in source and binary forms, with or without
	7	.\" modification, are permitted provided that the following conditions
	8	.\" are met:
	9	.\" 1. Redistributions of source code must retain the above copyright
	10	.\" notice, this list of conditions and the following disclaimer.
	11	.\" 2. Redistributions in binary form must reproduce the above copyright
	12	.\" notice, this list of conditions and the following disclaimer in the
	13	.\" documentation and/or other materials provided with the distribution.
	14	.\" 3. All advertising materials mentioning features or use of this software
	15	.\" must display the following acknowledgement:
	16	.\" This product includes software developed by the University of
	17	.\" California, Berkeley and its contributors.
	18	.\" 4. Neither the name of the University nor the names of its contributors
	19	.\" may be used to endorse or promote products derived from this software
	20	.\" without specific prior written permission.
	21	.\"
	22	.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	23	.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	24	.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	25	.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	26	.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	27	.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	28	.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	29	.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	30	.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	31	.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	32	.\" SUCH DAMAGE.
	33	.\"
	34	.\" @(#)getsockname.2 8.1 (Berkeley) 6/4/93
	35	.\"
	36	.Dd June 4, 1993
	37	.Dt GETSOCKNAME 2
	38	.Os BSD 4.2
	39	.Sh NAME
	40	.Nm getsockname
	41	.Nd get socket name
	42	.Sh SYNOPSIS
	43	.Fd #include <sys/socket.h>
	44	.Ft int
	45	.Fo getsockname
	46	.Fa "int socket"
	47	.Fa "struct sockaddr *restrict address"
	48	.Fa "socklen_t *restrict address_len"
	49	.Fc
	50	.Sh DESCRIPTION
	51	.Fn Getsockname
	52	returns the current
	53	.Fa address
	54	for the specified socket. The
	55	.Fa address_len
	56	parameter should be initialized to indicate
	57	the amount of space pointed to by
	58	.Fa address .
	59	On return it contains the actual size of the name
	60	returned (in bytes).
	61	.Sh RETURN VALUES
	62	.Rv -std getsockname
	63	.Sh ERRORS
	64	The
	65	.Fn getsockname
	66	system call will succeed unless:
	67	.Bl -tag -width Er
	68	.\" ==========
	69	.It Bq Er EBADF
	70	The argument
	71	.Fa socket
	72	is not a valid file descriptor.
	73	.\" ==========
	74	.It Bq Er EFAULT
	75	The
	76	.Fa address
	77	parameter points to memory not in a valid part of the
	78	process address space.
	79	.\" ==========
	80	.It Bq Er EINVAL
	81	.Fa socket
	82	has been shut down.
	83	.\" ==========
	84	.It Bq Er ENOBUFS
	85	Insufficient resources were available in the system
	86	to perform the operation.
	87	.\" ==========
	88	.It Bq Er ENOTSOCK
	89	The argument
	90	.Fa socket
	91	is not a socket (e.g., a plain file).
	92	.\" ==========
	93	.It Bq Er EOPNOTSUPP
	94	.Fn getsockname
	95	is not supported for the protocol in use by
	96	.Fa socket .
	97	.El
	98	.Sh SEE ALSO
	99	.Xr bind 2 ,
	100	.Xr socket 2
	101	.Sh BUGS
	102	Names bound to sockets in the UNIX domain are inaccessible;
	103	.Fn getsockname
	104	returns a zero-length name.
	105	.Sh HISTORY
	106	The
	107	.Fn getsockname
	108	call appeared in
	109	.Bx 4.2 .