GNU bug report logs - #66638
29.1; `file-relative-name' and symbolic links

Previous Next

To add a comment to this bug, you must first unarchive it, by sending
a message to control AT debbugs.gnu.org, with unarchive 66638 in the body.
You can then email your comments to 66638 AT debbugs.gnu.org in the normal way.

Toggle the display of automated, internal messages from the tracker.

Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Bogdan Ruslanovich Drozd <bogdan.ruslanovich.drozd <at> yandex.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 29.1; `file-relative-name' and symbolic links
Date: Thu, 19 Oct 2023 16:36:20 +0300

How I found the bug: LaTeX previews were not displayed in Org mode
because the path where the file lies contains a symbolic link
(e.g. `/home/user/docs/org' directory where `/home/user/docs' is a
symbolic link to a directory).

Bug description: `file-relative-name' (in `files.el') doesn't take into
account symbolic links.

How to reproduce:

1. Run `mkdir -p ~/a_dir/org'.

2. Run `ln -s ~/a_dir/org ~/docs'.

3. Run `emacs -Q ~/docs/example.org'.

4. Insert into the file "$2+2=4$", press `C-c C-x C-l', and see that it
does not work.

5. Kill emacs.

6. Run `emacs -Q ~/a_dir/org/example.org'.

7. Insert into the file "$2+2=4$, press `C-c C-x C-l', and see LaTeX
preview.

In GNU Emacs 29.1 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.24.38,
 cairo version 1.17.8) of 2023-09-30 built on localhost
Windowing system distributor 'The X.Org Foundation', version 11.0.12101008
System Description: Gentoo Linux

Configured using:
 'configure --prefix=/usr --build=x86_64-pc-linux-gnu
 --host=x86_64-pc-linux-gnu --mandir=/usr/share/man
 --infodir=/usr/share/info --datadir=/usr/share --sysconfdir=/etc
 --localstatedir=/var/lib --datarootdir=/usr/share
 --disable-silent-rules --docdir=/usr/share/doc/emacs-29.1-r1
 --htmldir=/usr/share/doc/emacs-29.1-r1/html --libdir=/usr/lib64
 --program-suffix=-emacs-29 --includedir=/usr/include/emacs-29
 --infodir=/usr/share/info/emacs-29 --localstatedir=/var
 --enable-locallisppath=/etc/emacs:/usr/share/emacs/site-lisp
 --without-compress-install --without-hesiod --without-pop
 --with-file-notification=inotify --with-pdumper --enable-acl
 --with-dbus --with-modules --without-gameuser --with-libgmp --with-gpm
 --with-native-compilation=aot --with-json --without-kerberos
 --without-kerberos5 --with-lcms2 --with-xml2 --without-mailutils
 --without-selinux --with-sqlite3 --with-gnutls --with-libsystemd
 --with-threads --with-tree-sitter --without-wide-int --with-sound=alsa
 --with-zlib --with-x --without-pgtk --without-ns --without-gconf
 --without-gsettings --without-toolkit-scroll-bars --with-xpm --with-xft
 --with-cairo --with-harfbuzz --without-libotf --without-m17n-flt
 --with-x-toolkit=gtk3 --without-xwidgets --with-gif --with-jpeg
 --with-png --with-rsvg --with-tiff --with-webp --with-imagemagick
 --with-dumping=pdumper 'CFLAGS=-O2 -pipe' 'LDFLAGS=-Wl,-O1
 -Wl,--as-needed''

Configured features:
ACL CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GPM HARFBUZZ IMAGEMAGICK
JPEG JSON LCMS2 LIBSYSTEMD LIBXML2 MODULES NATIVE_COMP NOTIFY INOTIFY
PDUMPER PNG RSVG SECCOMP SOUND SQLITE3 THREADS TIFF TREE_SITTER WEBP X11
XDBE XIM XINPUT2 XPM GTK3 ZLIB

Important settings:
  value of $LC_COLLATE: C.utf8
  value of $LC_MONETARY: en_GB.utf8
  value of $LANG: en_US.utf8
  locale-coding-system: utf-8-unix

Message #8 received at 66638 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Bogdan Ruslanovich Drozd <bogdan.ruslanovich.drozd <at> yandex.com>
Cc: 66638 <at> debbugs.gnu.org
Subject: Re: bug#66638: 29.1; `file-relative-name' and symbolic links
Date: Thu, 19 Oct 2023 17:12:39 +0300

tags 66638 notabug
thanks

> From: Bogdan Ruslanovich Drozd <bogdan.ruslanovich.drozd <at> yandex.com>
> Date: Thu, 19 Oct 2023 16:36:20 +0300
> 
> How I found the bug: LaTeX previews were not displayed in Org mode
> because the path where the file lies contains a symbolic link
> (e.g. `/home/user/docs/org' directory where `/home/user/docs' is a
> symbolic link to a directory).
> 
> Bug description: `file-relative-name' (in `files.el') doesn't take into
> account symbolic links.
> 
> How to reproduce:
> 
> 1. Run `mkdir -p ~/a_dir/org'.
> 
> 2. Run `ln -s ~/a_dir/org ~/docs'.
> 
> 3. Run `emacs -Q ~/docs/example.org'.
> 
> 4. Insert into the file "$2+2=4$", press `C-c C-x C-l', and see that it
> does not work.
> 
> 5. Kill emacs.
> 
> 6. Run `emacs -Q ~/a_dir/org/example.org'.
> 
> 7. Insert into the file "$2+2=4$, press `C-c C-x C-l', and see LaTeX
> preview.

This is not a bug.  If you want to resolve symlinks in a file name,
use file-truename before calling file-relative-name.  The latter is
purely a syntactic function which merely analyzes its file name
argument, and should not hit the disk.

Message #15 received at 66638-done <at> debbugs.gnu.org (full text, mbox):

From: Stefan Kangas <stefankangas <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 66638-done <at> debbugs.gnu.org,
 Bogdan Ruslanovich Drozd <bogdan.ruslanovich.drozd <at> yandex.com>
Subject: Re: bug#66638: 29.1; `file-relative-name' and symbolic links
Date: Fri, 22 Dec 2023 06:57:27 -0800

Eli Zaretskii <eliz <at> gnu.org> writes:

> tags 66638 notabug
> thanks
>
>> From: Bogdan Ruslanovich Drozd <bogdan.ruslanovich.drozd <at> yandex.com>
>> Date: Thu, 19 Oct 2023 16:36:20 +0300
>>
>> How I found the bug: LaTeX previews were not displayed in Org mode
>> because the path where the file lies contains a symbolic link
>> (e.g. `/home/user/docs/org' directory where `/home/user/docs' is a
>> symbolic link to a directory).
>>
>> Bug description: `file-relative-name' (in `files.el') doesn't take into
>> account symbolic links.
>>
>> How to reproduce:
>>
>> 1. Run `mkdir -p ~/a_dir/org'.
>>
>> 2. Run `ln -s ~/a_dir/org ~/docs'.
>>
>> 3. Run `emacs -Q ~/docs/example.org'.
>>
>> 4. Insert into the file "$2+2=4$", press `C-c C-x C-l', and see that it
>> does not work.
>>
>> 5. Kill emacs.
>>
>> 6. Run `emacs -Q ~/a_dir/org/example.org'.
>>
>> 7. Insert into the file "$2+2=4$, press `C-c C-x C-l', and see LaTeX
>> preview.
>
> This is not a bug.  If you want to resolve symlinks in a file name,
> use file-truename before calling file-relative-name.  The latter is
> purely a syntactic function which merely analyzes its file name
> argument, and should not hit the disk.

I'm therefore closing this bug report.

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.