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From: Greg Wooledge
Subject: Re: GROUPS
Date: Mon, 9 Aug 2021 20:36:39 -0400

On Mon, Aug 09, 2021 at 05:35:56PM -0400, Franklin, Jason wrote:
> Should bash, invoked with "--posix" or as "sh", omit the special
> treatment of variables such as GROUPS?

I would say no.  Using all-caps variable names is a bad idea for
precisely this reason -- you never know when it'll be something
special, in your shell or in your operating system.

Always use at least one lower-case letter in each variable name, unless
you're actually exporting something as an environment variable, and
you know that the name is not used by anything else in your working

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