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9bccf70c A	1	.\" $NetBSD: shutdown.2,v 1.5 1995/02/27 12:37:11 cgd 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	.\" @(#)shutdown.2 8.1 (Berkeley) 6/4/93
	35	.\"
3e170ce0	36	.Dd March 18, 2015
9bccf70c A	37	.Dt SHUTDOWN 2
	38	.Os BSD 4.2
	39	.Sh NAME
	40	.Nm shutdown
	41	.Nd shut down part of a full-duplex connection
	42	.Sh SYNOPSIS
	43	.Fd #include <sys/socket.h>
	44	.Ft int
2d21ac55 A	45	.Fo shutdown
	46	.Fa "int socket"
	47	.Fa "int how"
	48	.Fc
9bccf70c A	49	.Sh DESCRIPTION
	50	The
	51	.Fn shutdown
	52	call causes all or part of a full-duplex connection on
	53	the socket associated with
2d21ac55	54	.Fa socket
9bccf70c A	55	to be shut down.
	56	If
	57	.Fa how
91447636 A	58	is
	59	.Dv SHUT_RD ,
	60	further receives will be disallowed.
9bccf70c A	61	If
9bccf70c A	62	.Fa how
91447636 A	63	is
	64	.Dv SHUT_WR ,
	65	further sends will be disallowed.
9bccf70c A	66	If
9bccf70c A	67	.Fa how
91447636 A	68	is
	69	.Dv SHUT_RDWR ,
	70	further sends and receives will be disallowed.
2d21ac55 A	71	.Sh RETURN VALUES
2d21ac55 A	72	.Rv -std shutdown
9bccf70c A	73	.Sh ERRORS
	74	The call succeeds unless:
	75	.Bl -tag -width Er
2d21ac55	76	.\" ===========
9bccf70c	77	.It Bq Er EBADF
2d21ac55	78	.Fa Socket
9bccf70c	79	is not a valid descriptor.
2d21ac55 A	80	.\" ===========
	81	.It Bq Er EINVAL
	82	The
	83	.Fa how
	84	argument is invalid.
	85	.\" ===========
9bccf70c A	86	.It Bq Er ENOTCONN
9bccf70c A	87	The specified socket is not connected.
2d21ac55 A	88	.\" ===========
	89	.It Bq Er ENOTSOCK
	90	.Fa Socket
	91	is a file, not a socket.
9bccf70c A	92	.El
	93	.Sh SEE ALSO
	94	.Xr connect 2 ,
3e170ce0 A	95	.Xr connectx 2 ,
3e170ce0 A	96	.Xr disconnectx 2 ,
9bccf70c A	97	.Xr socket 2
	98	.Sh HISTORY
	99	The
	100	.Fn shutdown
	101	function call appeared in
	102	.Bx 4.2 .