Re: Prompt messed up if PS1 contains ANSI escape sequences

[alex xmb ratchev]

On Thu, Sep 7, 2023, 15:46 Gioele Barabucci <gioele@svario.it> wrote:

> On 07/09/23 15:00, alex xmb ratchev wrote:
> > u have to \[ esc-seq \]
> > eg inside \[ and \]
> >
> > PS1=$'\u\[\e[1m\]\h\[\e[0m- '
> >
> > should display hostname bold
>
> Thanks for the suggestion, but adding \] does not really fix the
> problem, it just masks it in many cases (better than nothing).
>
> Try:
>
> $ long_name="$(printf 'abcdef0123456789/%.0s' {0..20})"
> $ mkdir -p /tmp/$long_name
> $ cd /tmp/$long_name
> $ PS1='\n\[\e[1m\]\w\[\e[m\] \$ '
>

foo=$' .. '
not
foo=' .. '

(Adapted from <https://bugs.debian.org/631169>.)
>
> Now press up to recall the last command and press down to go back to an
> empty command line. Various stray characters will still be visible and
> the cursor will be in the wrong place.
>
> Also try to type any command (say `echo`) and you will notice that "cho"
> ends up displayed in the wrong line.
>
> Regards,
>
> --
> Gioele Barabucci
>