124 lines
3.6 KiB
Groff
124 lines
3.6 KiB
Groff
.\" $NetBSD: lptctl.8,v 1.14 2017/07/04 07:10:06 wiz Exp $
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.\"
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.\" Copyright (c) 2004 The NetBSD Foundation, Inc.
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.\" All rights reserved.
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.\"
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.\" This code is derived from software contributed to The NetBSD Foundation
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.\" by Gary Thorpe.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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.\" ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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.\" TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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.\" PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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.\" BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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.\" CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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.\" SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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.\" INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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.\" CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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.\" ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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.\" POSSIBILITY OF SUCH DAMAGE.
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.\"
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.Dd February 2, 2004
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.Dt LPTCTL 8
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.Os
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.Sh NAME
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.Nm lptctl
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.Nd manipulate lpt devices
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.Sh SYNOPSIS
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.Nm lptctl Ar device Op Ar command Op Ar ...
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.Sh DESCRIPTION
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.Nm
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is used to manipulate lpt devices so that a user can change how a
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printer that is attached to a parallel port works.
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If no command-argument pairs are specified, the status of the device
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is printed to standard output.
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The status information is also output after commands are carried out.
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.Sh DEVICE COMMANDS
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Multiple command-argument pairs can be specified.
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Available commands are:
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.Bl -item
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.It
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.Cm mode
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.Ar standard | nibble | ps2 | fast | ecp | epp
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.Pp
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Sets port to use a mode of operation: standard centronics mode
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(standard), nibble mode, bidirectional mode (ps2), fast centronics
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mode (fast), enhanced capabilities port mode (ecp), or enhanced
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parallel port mode (epp).
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.It
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.Cm dma
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.Ar yes | no
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.Pp
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Enables or disables DMA.
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Note DMA is only used in some advanced
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modes such as ECP, and only if interrupts are enabled too.
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.It
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.Cm ieee
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.Ar yes | no
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.Pp
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Enables or disables the use of
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.Tn IEEE 1284
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negotiations during mode changes and channel direction changes.
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.It
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.Cm intr
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.Ar yes | no
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.Pp
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Enables or disables use of interrupts for port operation.
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If interrupts are disabled, polling is used for data transfers.
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Default setting depends on device, but polling is commonly preferred.
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.It
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.Cm prime
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.Ar yes | no
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.Pp
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Enables (default) or disables printer initialization sequence
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on device open.
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Note the initialization sequence is never done
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on open of control lpt device.
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.It
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.Cm autolf
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.Ar yes | no
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.Pp
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Enables or disables (default) automatic LF on CR for data transfers.
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.El
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.Sh FILES
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.Bl -item
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.It
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.Pa /dev/lpt?ctl
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- printer port control devices
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.It
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.Pa /dev/lpt?
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- printer ports
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.El
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.Sh EXIT STATUS
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.Ex -std lptctl
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.Sh SEE ALSO
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.Xr ioctl 2 ,
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.Xr lpt 4 ,
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.Xr ppbus 4
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.Sh HISTORY
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A similar utility called
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.Nm lptcontrol
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exists in
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.Fx
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to control the
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.Xr lpt 4
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device.
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While similar in concept, the implementations are independent.
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.Nm
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was added in
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.Nx 2.0 .
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.Sh AUTHORS
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This man page and the
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.Nm
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utility were written by
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.An Gary Thorpe .
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