[fptex] can one capture an environmental variable within a new command in latex?

[Hans Hagen]

At 10:59 PM 2/3/2003 +0100, you wrote:
>On Mon, Feb 03, 2003 at 02:24:44PM -0600, Luis A Escobar wrote:
>
> > I would like to write a newcommand which captures an environmental
> >   variable defined in a windows environment. This could help me to
> >   write latex document that depend on environmental variables but which
> >   are basically machine independent in terms of paths, location of
> >   newcommands, figures, etc. Something like (but
> >
> >   \newcommand{mypath}{\getenv{\$HOME}}
>
>You can use the \write18-feature to call system commands,
>write it to a file and read this by TeX.
>
>\immediate\write18{echo %HOME%>env.tex}

hm, i guess that you meant something:

{\catcode`\%=12\gdef\percentstring{%}}

\immediate\write18{echo \percentstring HOME\percentstring>env.tex}

Hans
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