> > It doesn't require a subshell to save and restore stderr.
>
> At first I thought the same. And then I read this:
>
> <http://bash-hackers.org/wiki/doku.php/snipplets/kill_bg_job_without_message>
>
> It's also useless to temporarily redirect stderr when you call the
> kill command, since the successful termination of the job, the
> termination of the kill command and the message from the shell may not
> happen at the same time. And a blind sleep after the kill would be
> just a workaround.
>
> Doesn't some permanently redirected subshell solves this race condition?
Maybe, but I don't think it's necessary. I haven't tested it, but
what's wrong with
redirect stderr
kill pid
wait pid
restore stderr
It seems to me that this sequence forces the necessary synchronicity.
Chet
--
``The lyf so short, the craft so long to lerne.'' - Chaucer
``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, ITS, CWRU [email protected] http://cnswww.cns.cwru.edu/~chet/
