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Message-ID: <52695345.3060900@t-online.de>
Date: Thu, 24 Oct 2013 19:05:09 +0200
From: Christian Franke <Christian DOT Franke AT t-online DOT de>
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To: cygwin AT cygwin DOT com
Subject: Re: Root/Administrator privileges from cygwin terminal
References: <21085 DOT 47545 DOT 572257 DOT 639431 AT consult DOT pretender>
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someone at kosowsky dot org wrote:
> 2. Is there any better way to determine that one has Administrator
>     privileges than to run something like:
>     		id -G | grep -Eq '<\544\>'
>     Or:
> 		[[ `id -G` =~$(echo "\<544\>") ]]
>
> 	(note the 'echo' is used to get around incompatibilities in
> 	various versions of bash on how word separators are recognize.)

This should work with any shell:

   case " `id -G` " in *\ 544\ *) true;; *) false;; esac


I use this alternative approach to set a root prompt in /etc/profile:

   [ -r /proc/registry/HKEY_LOCAL_MACHINE/SECURITY ]

Instead of admin group membership this checks for SeBackupPrivilege.
See http://cygwin.com/ml/cygwin/2012-02/msg00806.html

Christian


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