Re: [wxperl-users] grr, vista issues

[Ovod-Everett, T. <TOv...@al...>]

Does the "small C based installer app" use buffering on its pipes or
not?  If not, is there a way to write another small C (or PerlApp-based)
wrapper that is also marked as needing elevated permissions that will
then start the installer app and redirect its output to a temp file that
can then be read by the Wx app?

If it does buffer its pipes, then things get a _lot_ trickier.  In a
situation under Win2K where I had to grab the output from an executable
that buffered its pipes and that used both STDOUT and STDIN, I ended up
having to start a Perl script in a fresh console that then forked the
executable within the same console and that used the Win32 APIs to
scrape output from the console every 10th of a second and then did
comparisons on that to figure out what was changing.  Yuck!

--Toby Ovod-Everett

-----Original Message-----
From: wxp...@li...
[mailto:wxp...@li...] On Behalf Of Ed W
Sent: Friday, June 15, 2007 9:26 AM
To: wxperl-users
Subject: [wxperl-users] grr, vista issues

OK, riddle me this:

I need to run a small C based installer app from my main perl program. =20
The app needs to run with "elevated permissions", which is a simple case

to mark the app appropriately under Vista, however, the app them *must*=20
be run via shellexecute or similar and NOT via CreateProcess, otherwise=20
vista seems to stop execution without letting the user escalate privs. =20
I also need to capture the output in realtime from the installer app and

show salient bits of it to the user to show that we didn't crash (long=20
running installer)

So having beaten around the bush on this for a long time already, can=20
anyone suggest that neatest way to start a completely separate process=20
under perl (preferably using shellexecute) and also be able to consume=20
the capture the output from the independent process (without blocking)=20
and filter it, then shove it into a Wx window to show that we are still=20
working?  I don't need to put input into the external app, just capture=20
it's output (it's a console app) and process the output in roughly
realtime

Thanks for any pointers

Ed W

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