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Re: Several issues with coprocesses regarding exit status


From: DJ Mills
Subject: Re: Several issues with coprocesses regarding exit status
Date: Tue, 11 Dec 2012 15:03:00 -0500

On Tue, Dec 11, 2012 at 2:49 PM, Greg Wooledge <address@hidden> wrote:

> Since coproc creates a background job, it doesn't really makes sense that
> the "coproc" command itself would know the exit status of the background
> job.  It would have to wait for the background job to terminate first,
> which would defeat the whole purpose.
>
> So, I'd just call it a documentation flaw.  Most likely "coproc" is
> indicating whether it successfully created the coprocess (bg job), and
> you'll have to use "wait" to fetch its exit status once it becomes
> available.
>


This I completely agree with. It may indeed be a documentation flaw, but
whether or not the process was launched correctly would be a nice thing to
know
anyway. Regardless, it shouldn't always fail when within an if statement.

The main issue I have is the fact that the "NAME_PID" variable disappears.


After a little more experimentation, it always seems to work with bash -i.
Job
control doesn't appear to be the culprit, though, as it doesn't work when
run
with bash -m.


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