System environment variables

[Jason Pyeron]

On Thu, 25 Aug 2005, Corinna Vinschen wrote:

> Basically a good idea, but it probably won't work for two reasons.
>
> - Some of the env variables in the registry are REG_EXPAND_SZ strings which
>  contain other variables like this:
>
>     %SystemRoot%\System32

ignoring it for now, those are not needed as much as ANT_HOME, JAVA_HOME, 
... and other vars setup by MSI scripts (often).

>
>  These strings have to be expanded before they are usable as real env
>  strings.
>
> - The output of cat isn't quoted, so you will probably get wrong results
>  when backslashes are used like above.

hmmm. Backslashes have been coming out fine, could the back-tic be doing 
something for me here?


The script has been working like a charm.

The outstanding issues:

1) efficient way to pass an excluded list of vars.
   ie exclude Path, Windir since Windir is WINDIR, etc

2) better way to test for 'foovar=' vs no var 'foovar'

3) detection of REG_EXPAND_SZ, and interpolation.

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