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Re: check if coproc has output

X-seq: zsh-users 28667
From: Roman Perepelitsa <roman.perepelitsa@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 17:02:15 +0100
Archived-at: <https://zsh.org/users/28667>
In-reply-to: <CAP+y1xA95KonZu=c2FKsf7mhTHsFs-B4O4rS4zWhRuV9-UuVKg@mail.gmail.com>
List-id: <zsh-users.zsh.org>
References: <CAP+y1xA95KonZu=c2FKsf7mhTHsFs-B4O4rS4zWhRuV9-UuVKg@mail.gmail.com>

On Thu, Jan 19, 2023 at 4:34 PM Pier Paolo Grassi <pierpaolog@xxxxxxxxx> wrote:
>
> 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)

When you press Ctrl-C, zsh sends SIGINT to long_running_process.
Ideally, it should honor the signal and terminate. Do you know why it
doesn't do that?

Roman.

Follow-Ups:
- Re: check if coproc has output
  - From: Pier Paolo Grassi

References:
- check if coproc has output
  - From: Pier Paolo Grassi

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