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Re: [bash 4] 'test -v 1' is never true

From: Chet Ramey
Subject: Re: [bash 4] 'test -v 1' is never true
Date: Sat, 26 Nov 2022 12:44:04 -0500
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:102.0) Gecko/20100101 Thunderbird/102.5.0

On 11/25/22 4:02 PM, Alejandro Colomar wrote:

I wrote a script, and am trying it on many systems.  On RHEL8, which has bash 4, it didn't work.  I could reduce the problem to the following command, which never returns true:

     test -v 1;

This is a bash feature. I cribbed it from ksh93, and it first appeared in

The initial implementation was restricted to shell variables -- positional
parameters like $1 are not shell variables.

After a bunch of requests, like


I added support for testing positional parameters in bash-5.1.

``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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