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From: Chet Ramey
Subject: Re: GROUPS
Date: Fri, 13 Aug 2021 10:53:34 -0400
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:78.0) Gecko/20100101 Thunderbird/78.10.0

On 8/13/21 10:32 AM, Greg Wooledge wrote:
On Fri, Aug 13, 2021 at 10:10:42AM -0400, Chet Ramey wrote:
As long as you stick to things POSIX standardizes. Relevant here, the
standard even includes a list of variables you should avoid using because
various shells and applications use them.

Just out of curiosity, where is that?  It's not under section
2.5.3 Shell Variables, which is where I looked first.

The closest thing I could find is a section in the Rationale that
describes some variables that are no longer covered by the standard,
but either used to be, or are commonly used as extensions:


Is there another section that I've missed?


"It is unwise to conflict with certain variables that are frequently
exported by widely used command interpreters and applications:"

``The lyf so short, the craft so long to lerne.'' - Chaucer
                 ``Ars longa, vita brevis'' - Hippocrates
Chet Ramey, UTech, CWRU    chet@case.edu    http://tiswww.cwru.edu/~chet/

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