Re: check if coproc has output

X-seq: zsh-users 28665

From: Pier Paolo Grassi <pierpaolog@xxxxxxxxx>

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

Subject: Re: check if coproc has output

Date: Thu, 19 Jan 2023 16:42:40 +0100

Archived-at: <https://zsh.org/users/28665>

In-reply-to: <CAP+y1xA95KonZu=c2FKsf7mhTHsFs-B4O4rS4zWhRuV9-UuVKg@mail.gmail.com>

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

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

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Re: check if coproc has output
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check if coproc has output
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