93 lines
2.2 KiB
Groff
93 lines
2.2 KiB
Groff
.\" $NetBSD: lptctl.8,v 1.2 2004/01/19 23:32:42 jdolecek Exp $
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.\"
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.\" Copyright notice
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.\"
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.\" The uncommented requests are required for all man pages.
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.\" The commented requests should be uncommented and used where appropriate.
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.Dd January 20, 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
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.Ar /dev/device
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.Oo
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.Op Ar command arg
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.Ar ...
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.Oc
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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 printer that
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is attached to a parallel port works.
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If no command-argument pairs are specified, the status of the device is printed to
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standard output using the following format:
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.Pp
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dma=[on|off] mode=[standard|nibble|ps2|fast|ecp|epp] ieee=[yes|no]
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.Pp
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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 up to a maximum of the total number
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of distinct commands possible. Available commands are:
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.Bl -item
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.It
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.Cm dma
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.Ar on | off
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.Pp
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Enables or disables DMA.
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.It
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.Cm mode
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.Ar standard | nibble | ps2 | fast | ecp
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.Ar | epp
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.Pp
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Sets port to use a mode of operation: standard centronics mode (standard),
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nibble mode, bidirectional mode (ps2), fast centronics mode (fast), enhanced
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capabilities port mode (ecp), or enhanced parallel port mode (epp).
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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 IEEE 1284 negotiations during mode changes and
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channel direction changes.
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.El
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.Sh EXIT STATUS
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.Nm
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returns 0 on success, >0 on failure.
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.Sh FILES
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.Bl -item
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.It
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.Pa /dev/lpt?
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- interrupt-driven printer ports
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.It
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.Pa /dev/lpa?
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- polled printer ports
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.El
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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 FreeBSD to control the lpt device. While similar in concept,
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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 Gary Thorpe.
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.Sh BUGS
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.Nm
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opens the printer device and causes device initialization if
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.Pa /dev/lpa?
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or
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.Pa /dev/lpt?
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are used. Therefore, a printer must be connected and functioning
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to use this utility or you will have to create a lpt device with an
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appropriate minor number (see
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.Xr lpt 4
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for more details).
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