From: Eli Zaretskii <eliz@gnu.org>
To: Achim Gratz <Stromeko@nexgo.de>
Cc: 24471@debbugs.gnu.org
Subject: bug#24471: 25.1.50; Error on empty PATH component
Date: Mon, 17 Oct 2016 21:53:48 +0300 [thread overview]
Message-ID: <83oa2iyfgj.fsf@gnu.org> (raw)
In-Reply-To: <87zim2q1se.fsf@Rainer.invalid> (message from Achim Gratz on Mon, 17 Oct 2016 20:16:17 +0200)
> From: Achim Gratz <Stromeko@nexgo.de>
> Date: Mon, 17 Oct 2016 20:16:17 +0200
>
> POSIX specifically prescribes that an empty PATH element equals "." and
> declares that a legacy feature that strictly conforming applications
> shall not use, but in other environment variables an empty path element
> is also allowed and replaced by different defaults. For NLSPATH that
> default is %N and for MANPATH it usually means some system-defined
> (POSIX doesn't mention that possibility).
>
> Whether default-directory equates "." seems to depend on when it gets
> evaluated, since it's normally set to some absolute path. So a textual
> replacement with "." seems more correct than some hand-waving about nil
> representing current-directory in the case of PATH.
I think you are wrong, because you don't realize what is Emacs's
interpretation of "." in exec-path. The interpretation is exactly
default-directory, AFAIR. And that is TRT, because Emacs interprets
"." and default-directory as being local to each buffer. IOW,
conceptually, when you switch to another buffer, you effectively chdir
into its default-directory.
Bottom line, "legacy feature" aside, I think converting an empty PATH
element to "." in exec-path conforms to POSIX, and therefore there's
no issue here left after Glenn pushed his changes.
prev parent reply other threads:[~2016-10-17 18:53 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-19 19:06 bug#24471: 25.1.50; Error on empty PATH component Achim Gratz
2016-09-19 19:14 ` Eli Zaretskii
2016-09-19 21:41 ` Achim Gratz
2016-09-19 21:59 ` Noam Postavsky
2016-09-22 18:44 ` Achim Gratz
2016-09-22 19:30 ` Eli Zaretskii
2016-09-22 20:10 ` Achim Gratz
2016-09-23 6:59 ` Eli Zaretskii
2016-09-23 15:54 ` Glenn Morris
2016-10-17 1:56 ` Glenn Morris
2016-10-17 16:21 ` Achim Gratz
2016-09-22 22:28 ` Noam Postavsky
2016-09-23 7:14 ` Eli Zaretskii
2016-10-17 16:25 ` Achim Gratz
2016-10-17 17:36 ` Eli Zaretskii
2016-10-17 18:16 ` Achim Gratz
2016-10-17 18:53 ` Eli Zaretskii [this message]
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