bash & $PS1 (display error)

[Randall R Schulz]

Rolf,

Assuming some of your prompt is non-printing (escape sequences) offset 
those non-printing portions with \[backslash-escaped square brackets\]. 
That tells BASH (and / or the readline library it incorporates) not to 
count those portions for the purpose of wrapping the displayed input lines.


Randall Schulz


At 19:41 2003-01-31, Rolf Campbell wrote:
>I've noticed several display problems with bash and prompts.  Here's an
>easy way to recreate one of them:
>
>(I've marked the lines to alleviate the wrapping problem)
>
>#line 1
>PS1='$PWD> '
>#line2
>mkdir -p
>/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp
>/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp
>#line3
>cd
>/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp
>/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp
>
>When I run this (whether it be in rxvt or in the NT console) I get a
>prompt that looks like this:
>/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp/tmp
>/tmp/tmp/tmp/tmp/tmp/tmp/tmp(#1)
>/tmp(#2)
>/tmp/tmp/tmp/tmp/tmp>
>
>I've marked the original new-lines.  (#1) in a correct wrap that
>occurred at the edge of my display.  (#2) is an incorrect wrap that
>happens for no obvious reason.
>
>This only seems to happen if the path is wider than the display.
>
>-Rolf Campbell


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