Re: weird less(1) CTRL-Z behaviour

[Chavdar Ivanov <ci4ic4%gmail.com@localhost>]

On 12 October 2022 12:08:26 (+01:00), Robert Elz wrote:

> Date: Wed, 12 Oct 2022 12:13:05 +0200
> From: Thomas Klausner <wiz%NetBSD.org@localhost>
> Message-ID: <Y0aTMSa8nDP2kA2E%yt.nih.at@localhost>
>
> | dir() { ls -al "$@" | less; }
> |
> | On -current (9.99.100 kernel from Oct 9, Userland from Sep 21, zsh
> | from May), when I CTRL-Z the less(1) and then want to go back in, it
> | doesn't work and I see the following:
>
> As Chavdar said, this seems to be specific to zsh (the sh problem
> is different, an in an area I have been working on in the past few
> days, so just ignore that one for this purpose).
>
> I tested a bunch of shells, zsh is the only one I saw fail this way.
Funny enough, even under zsh, the following works just fine:

 dir() { (/bin/ls -al "$@" | less;) }


>
> The issue will be related to process group control, zsh must be
> doing something different to other shells, and some recent
> kernel change might have altered how that works - perhaps just
> the timing.
>
> That might be serpgrp() or TIOCSPGRP (or whatever equiv is being
> used to change tge terminal's pgrp).
>
> Perhaps this enough for someone to recognise a change they might
> have made which could cause this.
>
> kre
>

-- 
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Chavdar Ivanov