.\"	$OpenBSD: xvctl.1,v 1.1 2006/11/26 10:59:22 matthieu Exp $
.\"
.\" Copyright (c) 2001 Marc Espie
.\"
.\" All rights reserved.
.\"
.\" Redistribution and use in source and binary forms, with or without
.\" modification, are permitted provided that the following conditions
.\" are met:
.\" 1. Redistributions of source code must retain the above copyright
.\"    notice, this list of conditions and the following disclaimer.
.\" 2. Redistributions in binary form must reproduce the above copyright
.\"    notice, this list of conditions and the following disclaimer in the
.\"    documentation and/or other materials provided with the distribution.
.\"
.\" THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY EXPRESS OR
.\" IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
.\" OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
.\" IN NO EVENT SHALL THE DEVELOPERS BE LIABLE FOR ANY DIRECT, INDIRECT,
.\" INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
.\" NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
.\" DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
.\" THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
.\" (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
.\" THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
.\"
.Dd November 9, 2001
.Dt XVCTL 1
.Os
.Sh NAME
.Nm xvctl
.Nd get or set xv extension values
.Sh SYNOPSIS
.Nm xvctl
.Op Fl n
.Op Fl d Ar display
.Op Fl s Ar screen
.Op Fl A Ar adaptor
.Ar name ...
.Nm xvctl
.Op Fl n
.Op Fl d Ar display
.Op Fl s Ar screen
.Op Fl A Ar adaptor
.Fl w
.Ar name=value ...
.Nm xvctl
.Op Fl n
.Op Fl d Ar display
.Op Fl s Ar screen
.Op Fl A Ar adaptor
.Fl a
.Sh DESCRIPTION
The
.Nm
utility retrieves the Xvideo extension attributes and
allows the user to set them.
.Pp
For instance, this can be used to change the contrast or brightness of an
external video program.

The options are as follows:
.Bl -tag -width xxx
.It Fl d Ar display
affect the display named
.Ar display , 
instead of the default display.
.It Fl s Ar screen
affect screen #
.Ar screen .
By default, the first screen with video adaptors will be chosen.
.It Fl A Ar adaptor
affect adaptor #
.Ar adaptor .
By default, the first display adaptor will be chosen.
.It Fl a 
list all the currently available gettable attributes.
.It Fl n
suppress printing of the field name, only output the field value.
Useful for setting shell variables.
.It Fl w
required to set a variable. The name should be followed
by an equal sign and the new value.
.El
.Sh SEE ALSO
.Xr xvinfo 1 ,
.Xr Xv 3x