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Subject:	Re: Cygwin console: Different default background color when terminal
	runs as Admin?
To:	cygwin <cygwin AT cygwin DOT com>
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Message-ID:	<37195ea6-c5da-dbbd-55d4-b73cac89589f@t-online.de>
Date:	Fri, 18 Aug 2023 10:11:43 +0200
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From:	Christian Franke via Cygwin <cygwin AT cygwin DOT com>
Reply-To:	Christian Franke <Christian DOT Franke AT t-online DOT de>
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Jonathon Merz via Cygwin 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

A alternative that should work with any shell, does not rely on 
(unfortunately localized) group names and only assumes that the 
Administrators group S-1-5-32-544 isn't remapped by /etc/group:

case " $(/usr/bin/id -G) " in
   *\ 544\ *) printf '\e]11;#FFFF80\a' ;;
esac

Or use a check of actual access rights:

if [ -r /proc/registry/HKEY_LOCAL_MACHINE/SAM/SAM ]; then ...; fi


I use this in .bashrc to add "(root)" to the default mintty title and 
set '#' as root prompt:

case " $(/usr/bin/id -G) " in
   *\ 544\ *) PS1=${PS1/\\e]0;\\w/\\e]0;\\w (root)}; PS1=${PS1/\\\$ /\# } ;;
esac

-- 
Regards
Christian


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