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From: Janis Papanagnou <janis_papanagnou+ng@hotmail.com>
Newsgroups: comp.unix.shell
Subject: Re: (bash) How (really!) does the "current job" get determined?
Date: Mon, 7 Oct 2024 14:54:54 +0200
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On 07.10.2024 13:48, Kenny McCormack wrote:
> 
> What annoys me is that (in bash), most, but not all, of the job control
> related commands take either a pid or a job number.  To be clear, what
> annoys me is that they don't *all* do.  In particular, "fg" only takes a
> job number.  "disown" takes either, which is a very good thing.  Wish they
> all did.

I think that shell's job control purpose is to make job handling
simpler than using PIDs (even though PIDs are also displayed when
a background job gets started). But, yes, a consistent interface
accepting both would be a good thing [for all shell's job control
commands]. Incidentally Bolky/Korn notes: "When a command in this
section [Job Control] takes an argument called /job/, /job/ can be
a process id." - I don't know about Bash, but Kornshell at least
seems to have done it right.

Janis