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.Dd January 20, 2004 .Dt LPTCTL 8 .Os .Sh NAME .Nm lptctl .Nd manipulate lpt devices .Sh SYNOPSIS .Nm lptctl .Ar /dev/device .Oo .Op Ar command arg .Ar ... .Oc .Sh DESCRIPTION .Nm is used to manipulate lpt devices so that a user can change how a printer that is attached to a parallel port works. If no command-argument pairs are specified, the status of the device is printed to standard output using the following format:
p dma=[on|off] mode=[standard|nibble|ps2|fast|ecp|epp] ieee=[yes|no]
p The status information is also output after commands are carried out. .Sh DEVICE COMMANDS Multiple command-argument pairs can be specified up to a maximum of the total number of distinct commands possible. Available commands are: l -item t .Cm dma .Ar on | off
p Enables or disables DMA. t .Cm mode .Ar standard | nibble | ps2 | fast | ecp .Ar | epp
p Sets port to use a mode of operation: standard centronics mode (standard), nibble mode, bidirectional mode (ps2), fast centronics mode (fast), enhanced capabilities port mode (ecp), or enhanced parallel port mode (epp). t .Cm ieee .Ar yes | no
p Enables or disables the use of .Tn IEEE 1284 negotiations during mode changes and channel direction changes. .El .Sh EXIT STATUS .Nm returns 0 on success, \*[Gt]0 on failure. .Sh FILES l -item t
a /dev/lpt? - interrupt-driven printer ports t
a /dev/lpa? - polled printer ports .El .Sh SEE ALSO .Xr ioctl 2 , .Xr lpt 4 , .Xr ppbus 4 .Sh HISTORY A similar utility called .Nm lptcontrol exists in .Fx to control the .Xr lpt 4 device. While similar in concept, the implementations are independent. .Nm was added in .Nx 2.0 . .Sh AUTHORS This man page and the .Nm utility were written by Gary Thorpe. .Sh BUGS .Nm opens the printer device and causes device initialization if
a /dev/lpt? are used. Therefore, a printer must be connected and functioning to use this utility or you will have to create a lpt device with an appropriate minor number (see .Xr lpt 4 for more details).