Change PS1 when run as administrator

[Thomas Wolff]

Am 15.03.2016 um 18:08 schrieb Corinna Vinschen:
> On Mar 15 12:33, Andrew Schulman wrote:
>>> I just came up with this recipe to change the default PS1 value to use red for the user@host part of the prompt and to change the $ character to a #:
>>>
>>>      if id | grep -qi 'member of administrators group'
>>>      then
>>>          export PS1=$(echo "$PS1" | sed -e 's_32_31_' -e 's_\\\$_#_')
>>>      fi
>>>
>>> IÂ’m not certain the string match on the output of id(1) works everywhere.  Is there a better way to check for admin privileges under Cygwin?  You canÂ’t check for UID or EUID == 0, for example, as youÂ’d do on a true POSIX system.
>> Ha!  Yes, there is:  see
>> https://cygwin.com/ml/cygwin/2015-02/msg00057.html.  The magic test is
>>
>> id -G | grep -qE '\<(544|0)\>'
>>
>> where 544 is the Administrators group, and 0 is the root group in case the
>> old root group entry is present in /etc/group.
>>
>> For example:
>>
>> id -G | grep -qE '\<(544|0)\>' && echo admin || echo user
> Thou shalt not use the test for gid 0 anymore.  If it works, remove the
> entry from /etc/group, or better, remove /etc/group entirely.  This entry
> will render wrong and unwanted results when you least expect them.  Such
> cruft always does.
So id -G | grep -q '\<544\>' I suppose. Is there also a universal 
replacement for
     elif id | grep -e "gid=.*(Power Users)" > /dev/null
?
Thomas

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple