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% \iffalse meta-comment
%
% Copyright (C) 1993-2020
%
% The LaTeX3 Project and any individual authors listed elsewhere
% in this file.
%
% This file is part of the Standard LaTeX `Tools Bundle'.
% -------------------------------------------------------
%
% It may be distributed and/or modified under the
% conditions of the LaTeX Project Public License, either version 1.3c
% of this license or (at your option) any later version.
% The latest version of this license is in
% https://www.latex-project.org/lppl.txt
% and version 1.3c or later is part of all distributions of LaTeX
% version 2005/12/01 or later.
%
% The list of all files belonging to the LaTeX `Tools Bundle' is
% given in the file `manifest.txt'.
%
% \fi
% \def\fileversion{v1.1a} \def\filedate{2003/12/28}
% \iffalse This is a METACOMMENT
% Doc-Source file to use with LaTeX2e
% Copyright (C) 1994-2004 Frank Mittelbach, all rights reserved.
% \fi
% \title{File not found error\thanks{This file has version
% \fileversion\ last revised \filedate}}
% \author{Frank Mittelbach}
% \MaintainedByLaTeXTeam{tools}
% \maketitle
%
% \changes{v1.0e}{97/07/07}{Added q and r replies (PR/2525).}
%
% \section{Introduction}
% When \LaTeXe{} is unable to find a file it will ask for an
% alternative file name. However, sometimes the problem is
% only noticed by \TeX{}, and in that case \TeX{} insists on
% getting a valid file name; any other attempt to leave this
% error loop will fail.\footnote{On some systems, \TeX{}
% accepts a special character denoting the end of file to
% return from this loop, e.g.\ Control-D on UNIX or Control-Z
% on DOS.} Many users try to respond in the same way as to
% normal error messages, e.g.\ by typing \meta{return}, or |s|
% or |x|, but \TeX{} will interpret this as a file name and
% will ask again.
% \par To provide a graceful exit out of this loop, we define
% a number of files which emulate the normal behavior of
% \TeX{} in the error loop as far as possible.
% \par After installing these files the user can respond with
% |h|, |q|, |r|, |s|, |e|, |x|, and on some systems also with
% \meta{return} to \TeX's missing file name question.
% \StopEventually{}
%
% \section{The documentation driver}
% This code will generate the documentation. Since it is the
% first piece of code in the file, the documentation can be
% obtained by simply processing this file with \LaTeXe.
% \begin{macrocode}
%<*driver>
\documentclass{ltxdoc}
\begin{document} \DocInput{fileerr.dtx} \end{document}
%</driver>
% \end{macrocode}
% \section{The files}
%
% \subsection{Asking for help with {\tt h}}
% When the user types |h| in the file error loop \TeX{} will
% look for the file |h.tex|. In this file we put a message
% informing the user about the situation (we use |^^J| to
% start new lines in the message) and then finish with a
% normal |\errmessage| command thereby bringing up \TeX's
% normal error mechanism.
% \begin{macrocode}
%<*help>
\newlinechar=`\^^J
\message{! The file name provided could not be found.^^J%
Use `<enter>' to continue processing,^^J%
`S' to scroll future errors^^J%
`R' to run without stopping,^^J%
`Q' to run quietly,^^J%
or `X' to terminate TeX}
\errmessage{}
%</help>
% \end{macrocode}
%
% \subsection{Scrolling this and further errors with {\tt s}}
% For the response |s| we put a message into the file |s.tex|
% and start |\scrollmode| to scroll further error messages in
% this run. On systems that allow |.tex| as a file name we
% can also trap a single \meta{return} from the user.
% \begin{macrocode}
%<+scroll|return|run,batch> \message{File ignored}
%<+scroll> \scrollmode
%<+run> \nonstopmode
%<+batch> \batchmode
% \end{macrocode}
%
% \subsection{Exiting the run with {\tt x} or {\tt e}}
%
% If the user enters |x| or |e| to stop \TeX{}, we need to put
% something into the corresponding file which will force \TeX{} to
% give up. We achieve this by turning off terminal output and then
% asking \TeX{} to stop: first by using the internal \LaTeX{} name
% |\@@end|, and if that doesn't work because something other than
% \LaTeX{} is used, by trying the \TeX{} primitive |\end|. The
% |\errmessage| is there to ensure that \TeX{}'s internal "history"
% variable is set to |error_message_issued|. This in turn will
% hopefully set the exit code on those operating systems that
% implement return codes (though there is no guarantee for this).
% \changes{v1.1a}{2003/12/28}{Attempt to set exit code (pr/3538).}
% \begin{macrocode}
%<+edit|exit> \batchmode \errmessage{}\csname @@end\endcsname \end
% \end{macrocode}
% We end every file with an explicit |\endinput| which prevents
% the docstrip program from putting the character table into
% the generated files.
% \begin{macrocode}
\endinput
% \end{macrocode}
%%
% \Finale
|
