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Date: Tue, 1 Oct 1991 15:15:15 -0500
From: Chet Ramey <chet@odin.INS.CWRU.Edu>
To: d0asta@dtek.chalmers.se
Subject: Re: fn prompt and readline
Cc: rc@archone.tamu.edu
Reply-To: chet@po.CWRU.Edu
In-Reply-To: Message from d0asta@dtek.chalmers.se of Sun, 29 Sep 1991 11:28:14 -0500
Message-Id: <9110012015.AA20546.SM@odin.INS.CWRU.Edu>
Read-Receipt-To: chet@po.CWRU.Edu

> If i define...
> 
> fn prompt {echo -n $HOSTNAME^'$'}
> prompt=''
> 
> ...I get...
> 
> <machine>$
> 
> ...for prompt.
> The Problem:
> Using readline to step back in history, the prompt disappears after
> a few steps. Is this a bug in readline or rc? What can I do to avoid it?

readline is called as readline(prompt_string) so that moving backwards and
forwards in the history will end up redrawing the screen to look right.
In your case, readline is being called with a null prompt, so nothing is
printed.

(Forgive me, I don't know the rc syntax very well, but wouldn't this or
something like it work?
	p1=`{echo -n $HOSTNAME^'$'}
	p2=';'
	prompt=( $p1^' ' $p2^' ' )

I'd better quit before I get confused...)

Chet


--
``Teach them politics and war so their sons may study medicine and mathematics
in order to give their children a right to study painting, poetry, music, and
architecture.''
Chet Ramey, CWRU  Inet: chet@po.CWRU.Edu   NeXT Mail: chet@macbeth.INS.CWRU.Edu