Re: unset IFS and ${v=$*} CTLNUL leakage

[Chet Ramey]

On 3/8/19 6:09 PM, Grisha Levit wrote:
> A few more that produce \177 in the output, though I'm not sure if
> these have defined output:
> 
>     $ IFS=$' \t\n'   # or any other IFS
>     $ set -- ''
>     $ recho ${v= "$*" }
>     <$'\177'>
> 
>     $ IFS=''
>     $ set -- '' ''
>     $ recho ${v= "$*" }
>     <$' \177 '>

These were changed last week in the 20190306 update.

> And also variations like the below all have \177 as well, but these
> I'm pretty sure are undefined:

These are all undefined, but there's nothing wrong with doing something
more reasonable than leaving the quoted nulls in there.

Chet

-- 
``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/