From: Eli Zaretskii <eliz@gnu.org>
To: Lars Ingebrigtsen <larsi@gnus.org>
Cc: 8035@debbugs.gnu.org, slpnabble@blackberry-hill.com
Subject: bug#8035: Processing of .. in a file path after going thru symlink
Date: Thu, 26 Aug 2021 19:44:11 +0300 [thread overview]
Message-ID: <83sfywrw9w.fsf@gnu.org> (raw)
In-Reply-To: <877dg8yxrx.fsf@gnus.org> (message from Lars Ingebrigtsen on Thu, 26 Aug 2021 18:29:54 +0200)
> From: Lars Ingebrigtsen <larsi@gnus.org>
> Date: Thu, 26 Aug 2021 18:29:54 +0200
> Cc: 8035@debbugs.gnu.org
>
> (file-exists-p "/tmp/comp/src/subdir/../foo.c")
> => nil
> (file-truename "/tmp/comp/src/subdir/../foo.c")
> => "/tmp/comp/dest/foo.c"
> (file-exists-p (file-truename "/tmp/comp/src/subdir/../foo.c"))
> => t
>
> And this is because:
>
> static Lisp_Object
> check_file_access (Lisp_Object file, Lisp_Object operation, int amode)
> {
> file = Fexpand_file_name (file, Qnil);
>
> I'm guessing it's calling expand-file-name here to resolve "~"?
No, because we always must call expand-file-name before invoking a
libc function that accesses files -- to support file names relative to
their buffer's default-directory.
> I think that `expand-file-name' call in check_file_access should be
> changed to something that just does the "~" expansion.
I don't think we can do that, for the reason explained above.
next prev parent reply other threads:[~2021-08-26 16:44 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-02-14 3:05 bug#8035: Processing of .. in a file path after going thru symlink spucci
2011-02-19 21:37 ` Glenn Morris
2011-02-20 2:35 ` Steve Pucci
2011-02-20 2:41 ` Steve Pucci
2021-08-26 16:29 ` Lars Ingebrigtsen
2021-08-26 16:44 ` Eli Zaretskii [this message]
2021-08-26 17:03 ` Lars Ingebrigtsen
2021-08-26 17:08 ` Eli Zaretskii
2021-08-26 17:24 ` Lars Ingebrigtsen
2021-08-26 17:30 ` Eli Zaretskii
2021-08-26 16:53 ` Andreas Schwab
2021-08-26 17:04 ` Lars Ingebrigtsen
2021-08-26 17:19 ` Andreas Schwab
2021-08-26 17:30 ` Lars Ingebrigtsen
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