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62 lines
2.6 KiB
TeX
62 lines
2.6 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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This chapter describes the PRINTER unit for Free Pascal. It was written for
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\dos by Florian kl\"ampfl, and
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it was written for \linux by Micha\"el Van Canneyt. Its basic functionality
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is the same for both systems.
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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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\procedure {AssignLst}{ ( Var F : text; ToFile : string[255])}
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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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}
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{ Errors are reported in Linuxerror.}
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{\seem{lpr}{1}}
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\input{printex/printex.tex} |