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Re: hash -l with empty hash table prints to stdout

From: Chet Ramey
Subject: Re: hash -l with empty hash table prints to stdout
Date: Tue, 16 Jun 2020 09:30:19 -0400
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:68.0) Gecko/20100101 Thunderbird/68.9.0

On 6/15/20 4:47 PM, beluro@web.de wrote:

> Bash Version: 5.0
> Patch Level: 3
> Release Status: release
> Description:

>       `hash -l' is supposed to generate output that is reusable as input
>       (`help hash' says so, at least). In case the hash table is empty, a
>       string not re-usable as input is output to stdout. The exit code
>       indicates success in this case. The string being output is locale-
>       dependant (and therefore is hard to filter out in a work-around).

It's an interesting question. An empty hash table is not an error
condition, and doesn't result in a non-zero exit status, so output to
stderr is not appropriate. You might want to temporarily enable posix mode,
which suppresses the message.

``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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