[Top][All Lists]
[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]
Re: creating backups in temporary directories
From: |
Stefan Monnier |
Subject: |
Re: creating backups in temporary directories |
Date: |
Sun, 09 Sep 2007 22:59:10 -0400 |
User-agent: |
Gnus/5.11 (Gnus v5.11) Emacs/23.0.50 (gnu/linux) |
> But in a directory with mode 1777 when you open a file that *you* own,
> nobody else can remove it or rename it, so normally nobody can replace it
> with a symlink. Emacs creates the problem when it moves /tmp/foo to
> /tmp/foo~ at which point /tmp/foo is free for an attacker to take.
> This suggests that Emacs should always do backup by copying
> in such directories. Would that solve the problem?
It replaces one problem by another. More specifically, it's safe to do
a backup using copying on one condition: that there was already a backup
(owned by you). Otherwise, we bump into the problem I mentioned originally:
some other user could see you're editing /tmp/foo and create a /tmp/foo~
symlink before you create it.
Stefan
- Re: creating backups in temporary directories, (continued)
- Re: creating backups in temporary directories, Stefan Monnier, 2007/09/09
- Re: creating backups in temporary directories, David Kastrup, 2007/09/09
- Re: creating backups in temporary directories, Andreas Schwab, 2007/09/09
- Re: creating backups in temporary directories, David Kastrup, 2007/09/09
- Re: creating backups in temporary directories, Davis Herring, 2007/09/10
- Re: creating backups in temporary directories, David Kastrup, 2007/09/10
- Message not available
- Re: creating backups in temporary directories, Davis Herring, 2007/09/10
- Re: creating backups in temporary directories, Richard Stallman, 2007/09/11
- Re: creating backups in temporary directories, Davis Herring, 2007/09/11
- Re: creating backups in temporary directories, Richard Stallman, 2007/09/09
- Re: creating backups in temporary directories,
Stefan Monnier <=
- Re: creating backups in temporary directories, Davis Herring, 2007/09/07
- Re: creating backups in temporary directories, Chris Moore, 2007/09/08
- Re: creating backups in temporary directories, Richard Stallman, 2007/09/08
- Re: creating backups in temporary directories, Stefan Monnier, 2007/09/09
- Re: creating backups in temporary directories, David Kastrup, 2007/09/09
- Re: creating backups in temporary directories, Richard Stallman, 2007/09/09