1*86d7f5d3SJohn Marino.\" Copyright (c) 1996 2*86d7f5d3SJohn Marino.\" Mike Pritchard <mpp@FreeBSD.org>. All rights reserved. 3*86d7f5d3SJohn Marino.\" 4*86d7f5d3SJohn Marino.\" Redistribution and use in source and binary forms, with or without 5*86d7f5d3SJohn Marino.\" modification, are permitted provided that the following conditions 6*86d7f5d3SJohn Marino.\" are met: 7*86d7f5d3SJohn Marino.\" 1. Redistributions of source code must retain the above copyright 8*86d7f5d3SJohn Marino.\" notice, this list of conditions and the following disclaimer. 9*86d7f5d3SJohn Marino.\" 2. Redistributions in binary form must reproduce the above copyright 10*86d7f5d3SJohn Marino.\" notice, this list of conditions and the following disclaimer in the 11*86d7f5d3SJohn Marino.\" documentation and/or other materials provided with the distribution. 12*86d7f5d3SJohn Marino.\" 3. All advertising materials mentioning features or use of this software 13*86d7f5d3SJohn Marino.\" must display the following acknowledgement: 14*86d7f5d3SJohn Marino.\" This product includes software developed by Mike Pritchard and 15*86d7f5d3SJohn Marino.\" contributors. 16*86d7f5d3SJohn Marino.\" 4. Neither the name of the author nor the names of its contributors 17*86d7f5d3SJohn Marino.\" may be used to endorse or promote products derived from this software 18*86d7f5d3SJohn Marino.\" without specific prior written permission. 19*86d7f5d3SJohn Marino.\" 20*86d7f5d3SJohn Marino.\" THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 21*86d7f5d3SJohn Marino.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22*86d7f5d3SJohn Marino.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23*86d7f5d3SJohn Marino.\" ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 24*86d7f5d3SJohn Marino.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25*86d7f5d3SJohn Marino.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26*86d7f5d3SJohn Marino.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27*86d7f5d3SJohn Marino.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28*86d7f5d3SJohn Marino.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29*86d7f5d3SJohn Marino.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30*86d7f5d3SJohn Marino.\" SUCH DAMAGE. 31*86d7f5d3SJohn Marino.\" 32*86d7f5d3SJohn Marino.\" $FreeBSD: src/share/man/man4/zero.4,v 1.3.2.1 2001/03/06 19:08:12 ru Exp $ 33*86d7f5d3SJohn Marino.\" $DragonFly: src/share/man/man4/zero.4,v 1.2 2003/06/17 04:36:59 dillon Exp $ 34*86d7f5d3SJohn Marino.\" 35*86d7f5d3SJohn Marino.Dd April 7, 1996 36*86d7f5d3SJohn Marino.Dt ZERO 4 37*86d7f5d3SJohn Marino.Os 38*86d7f5d3SJohn Marino.Sh NAME 39*86d7f5d3SJohn Marino.Nm zero 40*86d7f5d3SJohn Marino.Nd the zero device 41*86d7f5d3SJohn Marino.Sh DESCRIPTION 42*86d7f5d3SJohn MarinoThe 43*86d7f5d3SJohn Marino.Nm 44*86d7f5d3SJohn Marinodevice accepts and reads data as any ordinary (and willing) 45*86d7f5d3SJohn Marinofile, 46*86d7f5d3SJohn Marinobut throws away any data written to it, and returns an endless 47*86d7f5d3SJohn Marinosupply of null bytes when read. 48*86d7f5d3SJohn Marino.Sh FILES 49*86d7f5d3SJohn Marino.Bl -tag -width /dev/zero 50*86d7f5d3SJohn Marino.It Pa /dev/zero 51*86d7f5d3SJohn Marino.El 52*86d7f5d3SJohn Marino.Sh SEE ALSO 53*86d7f5d3SJohn Marino.Xr null 4 54*86d7f5d3SJohn Marino.Sh HISTORY 55*86d7f5d3SJohn MarinoA 56*86d7f5d3SJohn Marino.Nm 57*86d7f5d3SJohn Marinodevice appeared in 58*86d7f5d3SJohn Marino.Bx 4.4 . 59