xref: /freebsd/share/man/man4/null.4 (revision dda5b39711dab90ae1c5624bdd6ff7453177df31)
1afe61c15SRodney W. Grimes.\" Copyright (c) 1991, 1993
2afe61c15SRodney W. Grimes.\"	The Regents of the University of California.  All rights reserved.
3afe61c15SRodney W. Grimes.\"
4afe61c15SRodney W. Grimes.\" Redistribution and use in source and binary forms, with or without
5afe61c15SRodney W. Grimes.\" modification, are permitted provided that the following conditions
6afe61c15SRodney W. Grimes.\" are met:
7afe61c15SRodney W. Grimes.\" 1. Redistributions of source code must retain the above copyright
8afe61c15SRodney W. Grimes.\"    notice, this list of conditions and the following disclaimer.
9afe61c15SRodney W. Grimes.\" 2. Redistributions in binary form must reproduce the above copyright
10afe61c15SRodney W. Grimes.\"    notice, this list of conditions and the following disclaimer in the
11afe61c15SRodney W. Grimes.\"    documentation and/or other materials provided with the distribution.
12*dda5b397SEitan Adler.\" 3. Neither the name of the University nor the names of its contributors
13afe61c15SRodney W. Grimes.\"    may be used to endorse or promote products derived from this software
14afe61c15SRodney W. Grimes.\"    without specific prior written permission.
15afe61c15SRodney W. Grimes.\"
16afe61c15SRodney W. Grimes.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
17afe61c15SRodney W. Grimes.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18afe61c15SRodney W. Grimes.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19afe61c15SRodney W. Grimes.\" ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
20afe61c15SRodney W. Grimes.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21afe61c15SRodney W. Grimes.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22afe61c15SRodney W. Grimes.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23afe61c15SRodney W. Grimes.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24afe61c15SRodney W. Grimes.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25afe61c15SRodney W. Grimes.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26afe61c15SRodney W. Grimes.\" SUCH DAMAGE.
27afe61c15SRodney W. Grimes.\"
28afe61c15SRodney W. Grimes.\"	@(#)null.4	8.1 (Berkeley) 6/5/93
297f3dea24SPeter Wemm.\" $FreeBSD$
30afe61c15SRodney W. Grimes.\"
31afe61c15SRodney W. Grimes.Dd June 5, 1993
32afe61c15SRodney W. Grimes.Dt NULL 4
33afe61c15SRodney W. Grimes.Os
34afe61c15SRodney W. Grimes.Sh NAME
35afe61c15SRodney W. Grimes.Nm null
36afe61c15SRodney W. Grimes.Nd the null device
37afe61c15SRodney W. Grimes.Sh DESCRIPTION
38afe61c15SRodney W. GrimesThe
39afe61c15SRodney W. Grimes.Nm
40afe61c15SRodney W. Grimesdevice accepts and reads data as any ordinary (and willing)
41ae4eb6f8SSimon L. B. Nielsenfile -
426d249eeeSSheldon Hearnbut throws it away.
436d249eeeSSheldon HearnThe length of the
444b66483fSRuslan Ermilov.Nm
45afe61c15SRodney W. Grimesdevice is always zero.
46afe61c15SRodney W. Grimes.Sh FILES
47afe61c15SRodney W. Grimes.Bl -tag -width /dev/null
48afe61c15SRodney W. Grimes.It Pa /dev/null
49afe61c15SRodney W. Grimes.El
50c4a856d3SMike Pritchard.Sh SEE ALSO
51c4a856d3SMike Pritchard.Xr zero 4
52afe61c15SRodney W. Grimes.Sh HISTORY
53afe61c15SRodney W. GrimesA
54afe61c15SRodney W. Grimes.Nm
55afe61c15SRodney W. Grimesdevice appeared in
56afe61c15SRodney W. Grimes.At v7 .
57