%$Id: 1shell.tex,v 25.92 2006/06/28 15:06:41 al Exp $
% man commands shell .
% Copyright (C) 2001 Albert Davis
% Author: Albert Davis <aldavis@ieee.org>
%
% This file is part of "Gnucap", the Gnu Circuit Analysis Package
%
% This program is free software; you can redistribute it and/or modify
% it under the terms of the GNU General Public License as published by
% the Free Software Foundation; either version 2, or (at your option)
% any later version.
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% but WITHOUT ANY WARRANTY; without even the implied warranty of
% MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
% GNU General Public License for more details.
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% along with this program; if not, write to the Free Software
% Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
% 02110-1301, USA.
%------------------------------------------------------------------------
\section{{\tt !} command}
%\index{! command}
\index{operating system commands}
%------------------------------------------------------------------------
\subsection{Syntax}
\begin{verse}
{\tt !} {{\it command}}
\end{verse}
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\subsection{Purpose}

Run a program, or escape to a shell.
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\subsection{Comments}

Any {\it command\/} typed here will be passed to the system for it to execute.

The bare command {\tt !} will spawn an interactive shell.  Exiting the shell
will return.
%------------------------------------------------------------------------
\subsection{Examples}

\begin{description}

\item[{\tt ! ls *.ckt}] Run the command {\tt ls *.ckt} as if it were a shell
command.

\item[{\tt !}] No arguments mean to spawn an interactive shell.

\end{description}
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