Re: Arithmetic expansion in rediretion word is evaluated twice

From	Chet Ramey <chet.ramey@case.edu>
Newsgroups	gnu.bash.bug
Subject	Re: Arithmetic expansion in rediretion word is evaluated twice
Date	2020-06-02 10:09 -0400
Organization	ITS, Case Western Reserve University
Message-ID	<mailman.979.1591106958.2541.bug-bash@gnu.org> (permalink)
References	<CAH7i3LppMnJky1g3Fm5N-qDTzG3Oz54VLtcFrk185pf=OUA7rA@mail.gmail.com> <e77206bd-282c-1b99-d733-1fdd26289e9c@case.edu>

Show all headers | View raw

On 6/1/20 3:34 PM, Oğuz wrote:
> See:
> 
>     $ unset foo
>     $ : <$((foo+=42))
>     bash: 84: No such file or directory
>     $ echo $foo
>     84

Yes. The redirection is evaluated once for the open and again for the
error 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/

Back to gnu.bash.bug | Previous | Next | Find similar

Thread

Re: Arithmetic expansion in rediretion word is evaluated twice Chet Ramey <chet.ramey@case.edu> - 2020-06-02 10:09 -0400

csiph-web