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Date: Fri, 18 Aug 2023 13:48:47 +0200
To: cygwin AT cygwin DOT com
Subject: Re: Cygwin console: Different default background color when terminal
 runs as Admin?
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From: Corinna Vinschen via Cygwin <cygwin AT cygwin DOT com>
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Cc: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
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On Aug 18 11:51, Martin Wege via Cygwin wrote:
> On Fri, Aug 18, 2023 at 7:27 AM Jonathon Merz via Cygwin
> <cygwin AT cygwin DOT com> wrote:
> >
> > On Thu, Aug 17, 2023 at 7:13 PM Martin Wege via Cygwin <cygwin AT cygwin DOT com>
> > wrote:
> >
> > > Just an idea: Could the default background color of the Cygwin console
> > > be changed from black to grey (or RED) if the terminal has been
> > > started with Administrator rights?
> > >
> >
> > Assuming that:
> > 1. The Administrators group is called "Administrators"
> > 2. There aren't any non-administrative groups with "Administrators" in the
> > name
> > 3. You're using mintty for your terminal
> >
> > You can run the following in bash or zsh with the desired RGB values:
> >
> > if [[ `id -Gn` == *Administrators* ]]
> > then
> >     echo -ne "\e]11;#FFBBEE\a";
> > fi
> >
> 
> Looking at the output of /usr/bin/id -a was my first guess too. But
> this fails quickly because the names are localized. Seriously MS runs
> the Windows group names through the l10n wringer!! So what works on
> Windows for Germany will surely fail for Windows for Japan. Thus I am
> looking for a more portable solution.
> 
> Maybe the numeric group ids are more 'portable' across the Windows
> versions for different countries?

Admin group is always Windows SID 1-5-32-544 and gid 544 in Cygwin,
unless somebody overloads the gid values via an /etc/group file.

If you want to be really sure, you have to check every numeric gid
returned by `id -G' if it resolves to SID 1-5-32-544.  You can do
this with the getent(1) tool.


Corinna

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