How would I retrieve the stdout error message of a system/shell command?

[Regan Heath]

On Thu, 08 Sep 2011 16:33:49 +0100, Andrej Mitrovic  
<andrej.mitrovich at gmail.com> wrote:
> E.g.:
>
> import std.process;
>
> void main()
> {
>     auto res = shell("dmd bla.d");
> }
>
> where bla.d doesn't exist. This will throw an exception, but even if I
> caught the exception I will still loose the error message. Is there
> any way I could grab the error message? In this case it would be:
>
> "std.exception.ErrnoException at std\process.d(356):  (No error)"
>
> Okay that's a pretty useless error as it is, but other errors might be
> more informative and I'd like to grab them.

I have, somewhere, a windows (or perhaps cross platform?)  
pipestream/subprocess implementation.  But, this was for an older version  
of D/phobos and may not now compile.  I'll have a look for it tonight, or  
later today (as, hopefully we'll have internet at home this afternoon).

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