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Re: Bogus "no such job" (Re: Preliminary release of 3.0.8 - please test)
- X-seq: zsh-workers 10042
- From: Sven Wischnowsky <wischnow@xxxxxxxxxxxxxxxxxxxxxxx>
- To: zsh-workers@xxxxxxxxxxxxxx
- Subject: Re: Bogus "no such job" (Re: Preliminary release of 3.0.8 - please test)
- Date: Fri, 10 Mar 2000 10:33:37 +0100 (MET)
- In-reply-to: Sven Wischnowsky's message of Thu, 9 Mar 2000 13:01:32 +0100 (MET)
- Mailing-list: contact zsh-workers-help@xxxxxxxxxxxxxx; run by ezmlm
I wrote:
> Bart Schaefer wrote:
>
> ...
> >
> > I can believe that a race condition might cause "no such job: 3" once,
> > but twice in a row is impossible. So the only possible answer is that
> > the one and only job has STAT_NOPRINT set but *not* STAT_SUBJOB, which
> > in turn happens only at exec.c:768 and 806 (in 3.0.8; in 3.1.6-dev-19,
> > exec.c:993 and 1031), both in execpline(). See jobs.c:setprevjob(),
> > which is called from setcurjob().
>
> The one in 1031 isn't interesting here, it only makes the sub-shells
> created for stopped lists not report their jobs (list_pipe_child is
> non-zero only in those sub-shells). Leaves us with the one in 993.
> This is used to make sure that jobs started for commands which are
> not the first one in a pipeline and jobs started from some kind of
> pipeline nesting (e.g. in a loop in a pipeline) are not shown.
>
> Given that, your suggestion:
>
> > Now, it may be that the right solution is to have setprevjob() ignore
> > jobs that have STAT_NOPRINT set, but I wouldn't want that to mask some
> > more serious job-state problem. If you have any insights, share 'em.
>
> seems sensible. But... how can such a job survive when the super-job
> of the (main) pipeline is dead? I wished I could find a way to
> reproduce it.
I've played some more yesterday evening/night but still couldn't get
it to happen (with dev-19, that is).
Geoff, do you remember what you did before you got that message? Did
you kill some job/process? What (kind of) commands did you suspend?
Pipes with lists in them, commands that do some kind of signal
handling? (Yes, I'm guessing wildly...)
Bye
Sven
--
Sven Wischnowsky wischnow@xxxxxxxxxxxxxxxxxxxxxxx
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