Change PS1 when run as administrator
Tue Mar 15 16:33:00 GMT 2016
> 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'
> export PS1=$(echo "$PS1" | sed -e 's_32_31_' -e 's_\\\$_#_')
> IÂm 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 canÂt check for UID or EUID == 0, for example, as youÂd 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.
id -G | grep -qE '\<(544|0)\>' && echo admin || echo user
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