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.\" 36.Dd June 4, 1993 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 45.Fn shutdown "int s" "int how" 46.Sh DESCRIPTION 47The 48.Fn shutdown 49call causes all or part of a full-duplex connection on 50the socket associated with 51.Fa s 52to be shut down. 53If 54.Fa how 55is 0, further receives will be disallowed. 56If 57.Fa how 58is 1, further sends will be disallowed. 59If 60.Fa how 61is 2, further sends and receives will be disallowed. 62.Sh DIAGNOSTICS 63A 0 is returned if the call succeeds, -1 if it fails. 64.Sh ERRORS 65The call succeeds unless: 66.Bl -tag -width Er 67.It Bq Er EBADF 68.Fa S 69is not a valid descriptor. 70.It Bq Er ENOTSOCK 71.Fa S 72is a file, not a socket. 73.It Bq Er ENOTCONN 74The specified socket is not connected. 75.El 76.Sh SEE ALSO 77.Xr connect 2 , 78.Xr socket 2 79.Sh HISTORY 80The 81.Fn shutdown 82function call appeared in 83.Bx 4.2 . 84