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Date:	Thu, 24 Oct 2013 12:22:06 +0100
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Subject:	Re: Root/Administrator privileges from cygwin terminal
From:	Anthony Geoghegan <anthony DOT geoghegan AT gmail DOT com>
To:	cygwin AT cygwin DOT com
X-IsSubscribed:	yes

>    The only solution I have now is to open a new bash window as administrator.
>    So is there a way to elevate (or change) privileges from with a bash shell?

A while ago, I researched a Cygwin equivalent for sudo but that's what
I ended up doing, myself.

> 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.)

I use something similar:  [[ $(groups) == *Administrators* ]]
It's more readable and it works on pretty much every version of Bash.

For POSIX compatibility, you could probably use something like:
case $(groups) in
  *Administrators*) echo Member of Administrators group;;
  *) echo Not a member of Administrators group;;
esac

This approach has worked well enough for me in the past but I don't do
anything too unusual other than stopping / starting Windows services.

Regards,
Anthony Geoghegan

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