Strange behavior with PS1 prompt

[Donald Russell]

On Sat, Oct 17, 2009 at 18:16, Todd Zullinger <tmz at pobox.com> wrote:

> Donald Russell wrote:
> > On Sat, Oct 17, 2009 at 11:36, Petrus de Calguarium <kwhiskerz at gmail.com>
> wrote:
> >> Donald Russell wrote:
> >>
> >>> Any ideas/suggestions?
> >>
> >> None, except to report the bug.
> >>
> >> I have noticed this problem on and off for years and it doesn't
> >> have anything to do with the PS1 prompt. Try entering nothing on
> >> the command line, then use the up and down arrows, and eventually
> >> your prompt will pick up some stuff from a previous command,
> >> although, if you press the backspace, you will see that the input
> >> mark is as far left as it can go.
> >
> > OK, thanks... I really only noticed this after putting newlines etc in
> > my PS1 prompt, or at least it got more bothersome then.
> >
> > I'll file a bug against bash...
>
> I don't think this is a bug.  Rather, I think the problem is caused by
> not escaping the color codes you have embedded in your prompt.  Try
> this instead:
>
> export PS1="\n\[\033[0;35m\][\u@\h] ${PWD}\n$\[\033[0m\]"
>
> The \[ and \] begin and end a series of non-printable characters.
> This tells bash not to count those characters when determining the
> length of the prompt.  So the color escape sequences are wrapped in \[
> and \].
>
>
That makes sense since this problem really only started showing up regularly
when I changed my PS1 prompt to use color.

Thank you. :-)
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