From: Eli Zaretskii <eliz@gnu.org>
To: Philipp <p.stephani2@gmail.com>
Cc: 27986@debbugs.gnu.org
Subject: bug#27986: 26.0.50; `rename-file' can rename files without confirmation
Date: Sun, 06 Aug 2017 20:05:09 +0300 [thread overview]
Message-ID: <83poc8tynu.fsf@gnu.org> (raw)
In-Reply-To: <m2tw1kg0wt.fsf@p> (message from Philipp on Sun, 06 Aug 2017 17:40:18 +0200)
> From: Philipp <p.stephani2@gmail.com>
> Date: Sun, 06 Aug 2017 17:40:18 +0200
>
> (rename-file "/tmp/emacs/ẞ" "/tmp/emacs/ß")
> nil
>
> Note how `rename-file' has silently overwritten `ß'. This is because on
> macOS, `ß' and `ẞ' are different file names, but Emacs treats them as
> equal. Probably the test for case-insensitive file names should be
> removed altogether
Which one? there are two of them.
> (it can't work correctly and introduces a filesystem race)
It cannot work correctly _because_ of a possible race or because of
some other reasons? If the latter, please elaborate. If the former,
then at least on MS-Windows we have a race anyway, because the
underlying system APIs are not atomic. So at least on MS-Windows the
feature should stay, as it introduces no new issues and supports a
valid and quite important use case (the Windows shell supports it as
well, so we really cannot do less).
> and `rename-file' should use link(2) + unlink(2) if renameat2
> isn't available.
'link' and 'unlink' accept strings as arguments, not integer numbers
such as 2.
More to the point, how can this strategy work on a case-insensitive
filesystem? What am I missing?
next prev parent reply other threads:[~2017-08-06 17:05 UTC|newest]
Thread overview: 55+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-06 15:40 bug#27986: 26.0.50; `rename-file' can rename files without confirmation Philipp
2017-08-06 17:05 ` Eli Zaretskii [this message]
2017-08-14 17:09 ` Philipp Stephani
2017-08-14 17:22 ` Eli Zaretskii
2017-08-11 8:15 ` bug#27986: 26.0.50; 'rename-file' " Paul Eggert
2017-08-13 22:42 ` Paul Eggert
2017-08-14 15:40 ` Eli Zaretskii
2017-08-14 23:31 ` Paul Eggert
2017-08-15 16:04 ` Eli Zaretskii
2017-08-15 17:24 ` Paul Eggert
2017-08-15 17:42 ` Eli Zaretskii
2017-08-15 19:27 ` Paul Eggert
2017-08-16 2:36 ` Eli Zaretskii
2017-08-16 5:06 ` Paul Eggert
2017-08-16 14:21 ` Eli Zaretskii
2017-08-16 15:15 ` Paul Eggert
2017-08-16 16:06 ` Eli Zaretskii
2017-08-16 17:19 ` Paul Eggert
2017-08-16 17:30 ` Eli Zaretskii
2017-08-16 18:06 ` Glenn Morris
2017-08-16 22:31 ` Stefan Monnier
2017-08-16 23:56 ` Paul Eggert
2017-08-17 0:04 ` Stefan Monnier
2017-08-19 6:54 ` Eli Zaretskii
2017-09-10 22:49 ` Paul Eggert
2017-09-11 6:07 ` Paul Eggert
2017-09-11 14:47 ` Eli Zaretskii
2017-09-11 16:45 ` Paul Eggert
2017-09-11 17:09 ` Eli Zaretskii
2017-09-11 17:25 ` Paul Eggert
2017-09-12 9:25 ` Michael Albinus
2017-08-13 23:48 ` Paul Eggert
2017-08-14 13:44 ` Ken Brown
2017-08-14 15:21 ` Eli Zaretskii
2017-08-14 15:34 ` Eli Zaretskii
2017-08-14 16:33 ` Eli Zaretskii
2017-08-14 16:58 ` Philipp Stephani
2017-08-14 17:04 ` Eli Zaretskii
2017-08-14 16:50 ` Philipp Stephani
2017-08-14 23:03 ` Paul Eggert
2017-08-15 1:19 ` Paul Eggert
2017-08-15 2:35 ` Eli Zaretskii
2017-08-15 7:00 ` Paul Eggert
2017-08-15 16:08 ` Eli Zaretskii
2017-08-16 19:33 ` Ken Brown
2017-08-19 21:30 ` Ken Brown
2017-08-19 21:37 ` Paul Eggert
2017-08-19 22:04 ` Ken Brown
2017-08-19 22:38 ` Paul Eggert
2017-08-15 12:45 ` Andy Moreton
2017-08-15 16:18 ` Eli Zaretskii
2017-08-19 21:33 ` bug#27986: 26.0.50; 'rename-file' can rename files without Richard Stallman
2017-08-20 2:37 ` Eli Zaretskii
2017-08-25 20:33 ` John Wiegley
2017-08-26 7:30 ` Eli Zaretskii
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