Re: Why ``color_prompt`` is only set for ``xterm``?

[Greg Wooledge <greg@wooledge.org>]

On Sat, Sep 04, 2021 at 11:23:48PM -0500, David Wright wrote:
> $ cat /var/local/lib/myhosts/colours/axis 
> 5 magenta bbarbutton=white,magenta,none:bbarhotkey=magenta,white,none
> $ 
> 
> 5 is for ANSI colours,
> magenta is for, eg emacs, mutt, etc,
> bbarbutton is for mc.
> 
> The lines from /root/.bashrc are:
> 
> if [[ $- = *i* ]]; then
> 
>     export PROMPT_COMMAND='Myprompt="$? " && [ "$Myprompt" = "0 " ] && Myprompt=""'
> 
>     # read value from file, and sanitise it
>     Hue=$(head -c 1 /var/local/lib/myhosts/colours/"$HOSTNAME")
>     if grep -q ·"$Hue"· <<<"·0·1·2·3·4·5·6·7·8·9·"; then

It's strange that you used shell builtins for the $- check but not
for this check.

read -r Hue _ < /var/local/lib/myhosts/colours/"$HOSTNAME"
if [[ $Hue = [0-9] ]]; then

Or if you happen to use the other fields of that file later in the script,
then change the read command to store all 3 fields in shell variables.