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From: Janis Papanagnou <janis_papanagnou+ng@hotmail.com>
Newsgroups: comp.unix.shell
Subject: Re: Different variable assignments
Date: Sat, 19 Oct 2024 14:25:14 +0200
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On 19.10.2024 12:45, Kenny McCormack wrote:
> In article <vecmp3$pur$1@dont-email.me>,
> Lawrence D'Oliveiro  <ldo@nz.invalid> wrote:
>> On Sat, 12 Oct 2024 03:59:49 +0200, Janis Papanagnou wrote:
>>
>>> ... use bash-specifics like 'coproc' ...
>>
>> It isn't bash-specific.

Maybe; I haven't checked all existing shells. I know that the keyword
is not used in Kornshell. I know it's used in bash. I don't know, e.g.,
about zsh, the other major shell I'm also interested in.

> 
> People on these newsgroups often use phrases like "bash specific" as
> synonyms for "Not strictly POSIX" (*), even though the bash feature under
> discussion is also found in other shells.  In fact, many bash-isms,
> including "coproc", came originally from ksh.  I'm sure Janis knows this.

Please note that while ksh supports co-processes it doesn't use (to my
knowledge) the keyword 'coproc'. - Kornshells co-processes are invoked
by appending the '|&' token to a command and reads and writes are done
with 'read -p' and 'print -p', respectively.

Janis