On 29/04/2022 19:38, Robert Elz via austin-group-l at The Open Group wrote:
Date: Fri, 29 Apr 2022 15:39:23 +0100
From: "Geoff Clare via austin-group-l at The Open Group"
<austin-group-l@opengroup.org>
Message-ID: <20220429143923.GA22521@localhost>
| It also appears that dash still implements remove-before-prompting.
pdksh does as well. However, pdksh is no longer maintained and the
maintained shells that derive from pdksh have changed this.
busybox ash and my shell do as well, but both are derived from dash and
have merely retained dash's behaviour.
Does anyone not?
bash does not. bosh does not. ksh does not. mksh does not. posh does
not. yash does not. zsh does not.
You can test this by doing
true &
<press Enter; most shells will show the background command exited>
wait $!; echo $?
This should print 0. Then do the same, except with the first command
changed to false &. That should print 1.
For the record, in my shell, a fork of dash, I have retained the dash
behaviour for now because it is unclear to me what the expected
behaviour is if a later background job gets the same PID as a previous
background job. I consider the dash behaviour a bug, but do not want to
fix it in a way that introduces another bug.
Cheers,
Harald van Dijk
