Re: Can I find where cygwin is installed (for automation purposes)

[Paul Moore <p.f.moore@gmail.com>]

On Wed, 15 Apr 2020 at 16:54, Marco Atzeri via Cygwin <cygwin@cygwin.com> wrote:
>
> Am 15.04.2020 um 15:29 schrieb Paul Moore via Cygwin:
> > On Wed, 15 Apr 2020 at 11:54, Csaba Ráduly via Cygwin <cygwin@cygwin.com> wrote:
> >
> >> On my machine, I have a
> >>
> >> HKEY_LOCAL_MACHINE\SOFTWARE\Cygwin\setup
> >>
> >> key, which contains a string value named "rootdir" with the date "C:\cygwin64".
> >
> > Thanks, that looks more useful. I didn't think to check there as I
> > didn't recall having run the setup as "All users" so I assumed
> > everything would be in HKCU. I should have checked!
> > Paul
> > --
>
>
> Pay attention that Setup links to the last updated one 64 or 32bit
>
> Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Cygwin\Setup
> Computer\HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Cygwin\Setup
>
> Installations report all if more are installed (borderline case, maybe)
>
> Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Cygwin\Installations
> Computer\HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Cygwin\Installations
>
> both version 32 and 64 bit are reported on
>
> Computer\HKEY_CURRENT_USER\Software\Cygwin\Installations

Thanks. Can you explain what the \?? prefix on the Installations
values is about? I'm nervous that there's something going on there
that means that just ignoring the first 3 characters isn't
sufficient... ;-)

Paul