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Re: Read Prompt Width Miscalculation (Non-Printing Characters)

From: Chet Ramey
Subject: Re: Read Prompt Width Miscalculation (Non-Printing Characters)
Date: Wed, 28 Dec 2022 20:20:35 -0500
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:102.0) Gecko/20100101 Thunderbird/102.6.1

On 12/28/22 2:09 PM, The Administrator wrote:
Hello and happy holiday hacking.  Does the read builtin stand to benefit from \[ and \] denotation ala $PS1 and friends?  Here is a quick example:

read -erp "$( tput setaf 2 )NEW:$( tput sgr0 ) "

You can either use $'\001' and $'\002' in place of \[ and \], which is
what they end up expanding to for readline, or you can write your prompt
string as you would write PS1 and use the ${word@P} expansion when you
pass it as an argument to `read' (preferred).

``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    chet@case.edu    http://tiswww.cwru.edu/~chet/

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