[Bug 50804] LTSpice XVII will not start

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=50804

--- Comment #21 from Zebediah Figura <z.figura12 at gmail.com> ---
(In reply to Chris Caudle from comment #20)
> (In reply to Zebediah Figura from comment #18)
> > My guess is that it was broken by wine-staging commit 811467bf6a4, and my
> > further guess is that it won't run on Windows unless you explicitly run it
> > with elevated privileges.
> > 
> > We'll need some way of explicitly elevating privileges in wine, to accompany
> > that patch.
> 
> How does wine handle requests to write to what would be Windows system
> directories?  One possibility for why this program does not always trigger
> the problem, or trigger with the exact same symptoms, is that in most cases
> it only needs access to the (Windows) user directories, but when it checks
> for updates it needs to write to \Program Files\LTC\LTspiceXVII which would
> need admin privelege to write to on a Windows machine.
> The equivalent on my linux machine would be ~/.wine/drive_c/Program\
> Files/LTC/LTspiceXVII/ which any process running under my user account
> should have access to.  Everything under .wine/drive_c appears to have
> rwxrwxr-x permissions, so perhaps that is not related.  Just something that
> came to mind regarding why the application may not behave identically on
> ever start.

We don't actually prevent access to system files. In fact, we don't actually
restrict access to anything at all just based on whether the user is reported
as an administrator. However, some applications demand to be treated as one or
the other, and call dedicated APIs to check the elevation of the current
process.

Bug 39262 is about the other case, where the application wants to be a
non-administrator. The linked wine-staging patch takes the approach of
reporting all processes as non-administrator, and automatically elevating them
when requested (i.e. where Windows would spawn a UAC prompt and ask for
credentials). However, some applications don't use that method, and instead
demand that the user uses right-click and "Run as Administrator". We'll need to
implement the latter in Wine.

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