Re: PATCH: subshell into a new process group

X-seq: zsh-workers 54510

From: Bart Schaefer <schaefer@xxxxxxxxxxxxxxxx>

To: Anthony Heading <ajrh@xxxxxxxx>

Cc: Zsh hackers list <zsh-workers@xxxxxxx>

Subject: Re: PATCH: subshell into a new process group

Date: Sat, 9 May 2026 10:29:50 -0700

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On Fri, May 8, 2026, 9:16 PM Anthony Heading <ajrh@xxxxxxxx> wrote:

Hi,

I have found this feature useful to allow signals to be sent to precisely bounded subshell trees. I couldn't find any existing way to achieve it

Not at a shell right now but I'm pretty sure the way to do this is

( print this is a new pgrp ) &!

You just have to capture the value of $! and use that PID for signaling the new group. There's no point in keeping the subshell as a bg job because you'll get TTIN/TTOU signals if fg'd.

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