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Re: exiting noninteractive shells on 'shift 2'


From: Chet Ramey
Subject: Re: exiting noninteractive shells on 'shift 2'
Date: Fri, 9 Nov 2018 11:55:39 -0500
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:60.0) Gecko/20100101 Thunderbird/60.3.0

On 11/9/18 11:46 AM, Eric Blake wrote:
> On 11/9/18 10:42 AM, Chet Ramey wrote:
> 
>>
>>>      A diagnostic message shall be written to standard error whenever an
>>> error condition occurs."
>>>
>>> Since 'shift 2' when $# is 1 is an error, and results in non-zero status,
>>> it should print a diagnostic to stderr.
>>
>> So maybe the thing to do is to turn on the shift_verbose option in posix
>> mode.
> 
> Cool - I didn't realize we already had a shopt for that. Yes, it sounds
> like in POSIX mode, shift_verbose should be turned on.
> 
> On a related note, should turning on POSIX mode also auto-enable xpg_echo?

No. That's just more of a can of worms than I want to deal with. Bash
claims strict conformance with both posix and xpg_echo enabled (that's what
the `strict-posix' configure option does, among other things).

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



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