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356a3d1609
* provided local copies or required styles since debian does not
supply the listings.sty anymore
73 lines
2.8 KiB
TeX
73 lines
2.8 KiB
TeX
%
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% $Id$
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% This file is part of the FPC documentation.
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% Copyright (C) 1997, by Michael Van Canneyt
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%
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% The FPC documentation is free text; you can redistribute it and/or
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% modify it under the terms of the GNU Library General Public License as
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% published by the Free Software Foundation; either version 2 of the
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% License, or (at your option) any later version.
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%
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% The FPC Documentation is distributed in the hope that it will be useful,
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% but WITHOUT ANY WARRANTY; without even the implied warranty of
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% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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% Library General Public License for more details.
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%
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% You should have received a copy of the GNU Library General Public
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% License along with the FPC documentation; see the file COPYING.LIB. If not,
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% write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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% Boston, MA 02111-1307, USA.
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%
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\chapter{The PRINTER unit.}
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\label{ch:printerunit}
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\FPCexampledir{printex}
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This chapter describes the PRINTER unit for Free Pascal. It was written for
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\dos by Florian Kl\"ampfl, and it was written for \linux by Micha\"el Van
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Canneyt, and has been ported to \windows and \ostwo as well.
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Its basic functionality is the same for al supported systems, although there
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are minor differences on \linux.
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The chapter is divided in 2 sections:
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\begin{itemize}
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\item The first section lists types, constants and variables from the
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interface part of the unit.
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\item The second section describes the functions defined in the unit.
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\end{itemize}
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\section {Types, Constants and variables : }
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\begin{verbatim}
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var
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lst : text;
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\end{verbatim}
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\var{Lst} is the standard printing device. \\ On \linux,
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\var{Lst} is set up using \var{AssignLst('/tmp/PID.lst')}.
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You can change this behaviour at compile time, setting the DefFile constant.
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\section {Procedures and functions}
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\begin{procedure}{AssignLst}
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\Declaration
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Procedure AssignLst ( Var F : text; ToFile : string[255]);
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\Description
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\linux only. \\
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Assigns to F a printing device. ToFile is a string with the following form:
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\begin{itemize}
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\item \var{ '|filename options'} : This sets up a pipe with the program filename,
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with the given options, such as in the popen() call.
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\item \var{ 'filename'} : Prints to file filename. Filename can contain the string 'PID'
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(No Quotes), which will be replaced by the PID of your program.
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When closing lst, the file will be sent to lpr and deleted.
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(lpr should be in PATH)
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\item \var {'filename|'} Idem as previous, only the file is NOT sent to lpr, nor is it
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deleted.
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(useful for opening /dev/printer or for later printing)
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\end{itemize}
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\Errors
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Errors are reported in Linuxerror.
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\SeeAlso
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\seem{lpr}{1}
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\end{procedure}
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\FPCexample{printex}
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