From: Stefan Monnier <monnier@IRO.UMontreal.CA>
To: Noah Friedman <noah@splode.com>
Cc: emacs-devel@gnu.org
Subject: Re: setenv's broken case when value is nil
Date: Thu, 18 Feb 2010 10:38:41 -0500 [thread overview]
Message-ID: <jwvaav6ftg6.fsf-monnier+emacs@gnu.org> (raw)
In-Reply-To: <20100217180216.661079.FMU4029@unexploded-cow.prv.splode.com> (Noah Friedman's message of "Wed, 17 Feb 2010 18:02:16 -0800 (PST)")
>> lorentey@elte.hu changed env.el on 2007-08-29 to define setenv-internal and
>> for setenv always to keep the variable name in process-environment, even if
>> value is nil. In other words, he removed the distinction between the empty
>> string and nil, and therefore you can't remove variables from the
>> environment using setenv anymore.
That would be a bug, so bug-gnu-emacs would have been a better place to
send it.
This said, I don't see this bug: after (setenv "COLORTERM" nil),
a M-! printenv RET indeed doesn't show COLORTERM any more.
`process-environment' still has an entry for COLORTERM but this entry
has the form "COLORTERM" rather than "COLORTERM=" which distinguishes
the empty-string-envvars from the the absent-envvars.
Stefan
next prev parent reply other threads:[~2010-02-18 15:38 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-18 1:56 setenv's broken case when value is nil Noah Friedman
2010-02-18 2:02 ` Noah Friedman
2010-02-18 15:38 ` Stefan Monnier [this message]
2010-02-18 4:12 ` Giorgos Keramidas
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