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
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.
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.