https://bugs.documentfoundation.org/show_bug.cgi?id=118826
Bug ID: 118826
Summary: FILEOPEN lock file does not protect against opening
via a symlink to the same file
Product: LibreOffice
Version: 5.4.7.2 release
Hardware: All
OS: Linux (All)
Status: UNCONFIRMED
Severity: normal
Priority: medium
Component: LibreOffice
Assignee: libreoffice-bugs@lists.freedesktop.org
Reporter: nigel.ar...@silson.com
If a symlink in one folder refers to a file in another folder, then the
lockfile created when the file is opened does not protect against a second
instance of LibreOffice Calc opening the same file via the symlink.
This can lead to loss of data caused by one user updating a file and the
results being overwritten by another user saving his different updates. Or even
by the same user forgetting that he already has the file open. It's therefore a
major or even critical bug.
Affects both calc and writer so reported under LibreOffice.
To verify
-create (say) /home/user/Documents/t.odt
-in terminal, ln -s /home/user/Documents/t.odt /home/user/Desktop/
-navigate to Documents (I used nemo) and open t.odt by double-clicking
-doubleclick the link to t.odt on the desktop, and a second writer instance
appears with the same file open and no error message
-verify potential data loss by changing in one instance and saving, then
changing diffedrently in the second abd saving.
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