Re: check if coproc has output

X-seq: zsh-users 28666

From: Sebastian Gniazdowski <sgniazdowski@xxxxxxxxx>

To: Pier Paolo Grassi <pierpaolog@xxxxxxxxx>

Cc: Zsh-Users List <zsh-users@xxxxxxx>

Subject: Re: check if coproc has output

Date: Thu, 19 Jan 2023 16:01:38 +0000

Archived-at: <https://zsh.org/users/28666>

In-reply-to: <CAP+y1xDXHZUj7Uad9dVia_HAsdpkDVsVLH3_6wBH=5fLmQQtSw@mail.gmail.com>

List-id: <zsh-users.zsh.org>

References: <CAP+y1xA95KonZu=c2FKsf7mhTHsFs-B4O4rS4zWhRuV9-UuVKg@mail.gmail.com> <CAP+y1xDXHZUj7Uad9dVia_HAsdpkDVsVLH3_6wBH=5fLmQQtSw@mail.gmail.com>

You could get pid from $jobtexts?

On Thu, 19 Jan 2023 at 15:43, Pier Paolo Grassi <pierpaolog@xxxxxxxxx> wrote:

I realize now the subject doesn't reflect the final version of the mail, sorry for that

Pier Paolo Grassi

Il giorno gio 19 gen 2023 alle ore 16:32 Pier Paolo Grassi <pierpaolog@xxxxxxxxx> ha scritto:
Hello, I want to populate an array from a long running process, something like:

long_running_process | while read line
do
array+=$line
done

problem is, since long_running_process does not continually produce output but only some times, when i try to interrupt this pipeline with ctrl-c I have to wait until it produces some output for the process to terminate (because, as I understand it, when it tries to write to the pipe it receives a sigpipe due to it being already closed)

I have tried various constructs with trap and even coproc to be able to intercept the ctrl-c and send a sigpipe to the long running process, but to no result.

I wonder if someone has some solution to share for this problem, thanks

Pier Paolo Grassi

Best regards,

Sebastian Gniazdowski

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