[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

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 09:56:05 -0400
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:68.0) Gecko/20100101 Thunderbird/68.9.0

On 6/16/20 9:46 AM, Eli Schwartz wrote:
> On 6/16/20 9:30 AM, Chet Ramey wrote:
>> 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.
> stderr is also a reasonably appropriate place to emit debug info or
> warnings. I would consider this a warning condition...

It's not a warning; there's nothing to warn about. An empty hash table is
not an exceptional condition. It's simply informational.

``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/

reply via email to

[Prev in Thread] Current Thread [Next in Thread]