Re: [PATCH] Fix blocking read timeouts at a small probability

[Chet Ramey]

On 2/12/21 1:51 AM, Koichi Murase wrote:
> 2021年2月12日(金) 4:27 Chet Ramey <chet.ramey@case.edu>:
> > > Thank you. Yes, if there is a simpler but still robust and reliable
> > > way to do it, that would be nice.
> >
> > There is, in fact, a simpler way for this case. Blocking SIGCHLD around the
> > calls to zread and its siblings fixes the problem. It might not be enough
> > of a general solution for you, though.
>
> Thank you for the fix. Now I see why this particular form (CMD & read
> -t) < XXX caused a significantly large timeout-failure rate. But, I
> guess the failure rate is almost zero but not exactly zero even after
> this fix. 

I can't reproduce the failure at all with the sigprocmask changes I added.

--
``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/