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From: Brian Patrie <bpatrie@bellsouth.spamisicky.net>
Newsgroups: comp.unix.shell
Subject: Re: bash prompt question
Date: Tue, 24 Sep 2024 01:42:47 -0500
Organization: an elaborate system of piles and accidents
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Geoff Clare wrote:
 > Brian Patrie wrote:
 >> sh (and its clones)--which don't support an rc file--are,
 >> of course, the exception to this rule.
 >
 > You don't count a file specified in ENV as an "rc file" ?

Not all shells support ENV.  dash doesn't seem to.  Even if they did, it 
would still be a bad idea to export the prompt strings in other shells.