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. 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.\" @(#)shutdown.2 8.1 (Berkeley) 6/4/93 33.\" $FreeBSD: src/lib/libc/sys/shutdown.2,v 1.7.2.7 2001/12/14 18:34:01 ru Exp $ 34.\" $DragonFly: src/lib/libc/sys/shutdown.2,v 1.2 2003/06/17 04:26:47 dillon Exp $ 35.\" 36.Dd February 27, 2001 37.Dt SHUTDOWN 2 38.Os 39.Sh NAME 40.Nm shutdown 41.Nd shut down part of a full-duplex connection 42.Sh LIBRARY 43.Lb libc 44.Sh SYNOPSIS 45.In sys/types.h 46.In sys/socket.h 47.Ft int 48.Fn shutdown "int s" "int how" 49.Sh DESCRIPTION 50The 51.Fn shutdown 52call causes all or part of a full-duplex connection on 53the socket associated with the file descriptor 54.Fa s 55to be shut down. 56The 57.Fa how 58argument specifies the type of shutdown. 59Possible values are: 60.Bl -tag -width SHUT_RDWR 61.It Dv SHUT_RD 62further receives will be disallowed. 63.It Dv SHUT_WR 64further sends will be disallowed. 65.It Dv SHUT_RDWR 66further sends and receives will be disallowed. 67.El 68.Sh RETURN VALUES 69.Rv -std shutdown 70.Sh ERRORS 71The 72.Fn shutdown 73call fails if: 74.Bl -tag -width Er 75.It Bq Er EBADF 76The 77.Fa s 78argument is not a valid file descriptor. 79.It Bq Er EINVAL 80The 81.Fa how 82argument is invalid. 83.It Bq Er ENOTCONN 84The socket is not connected. 85.It Bq Er ENOTSOCK 86The 87.Fa s 88argument does not refer to a socket. 89.El 90.Sh SEE ALSO 91.Xr connect 2 , 92.Xr socket 2 93.Sh STANDARDS 94The 95.Fn shutdown 96function is expected to comply with 97.St -p1003.1g-2000 , 98when finalized. 99.Sh HISTORY 100The 101.Fn shutdown 102function call appeared in 103.Bx 4.2 . 104The 105.Dv SHUT_RD , SHUT_WR , 106and 107.Dv SHUT_RDWR 108constants appeared in 109.St -p1003.1g-2000 . 110