Messages in this thread | | | From | John Bradford <> | Subject | Re: Undelete files on ext3 ?? | Date | Wed, 8 Jan 2003 10:57:01 +0000 (GMT) |
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> > > > Therefore, it's time for somebody to put a 'dumpster` in all the Linux > > > > file-systems. Somebody should then modify `rm` and the kernel unlink > > > > to `mv' files to the dumpster directory on the file-system, instead of > > > > really deleting them.
[snip discussion about a temporary directory for deleted files]
> Yes. But we could do better. Since no program uses the __syscall > interface directly, wraping unlink in libc would affect all programs > including rm. It could even be done withou recompiling anything using > LD_PRELOAD.
I disagree. This is the wrong goal to be aiming for.
A temporary directory for deleted files can, and should be, implemented in userspace.
What is much more interesting is the possibility of what I described earlier in the thread as a virtual WORM device, and what Andreas said could be done with LVM already using filesystem snapshots - I.E. the ability to mount the filesystem as it was at any date and time in the past.
However, as far as I can see, LVM snapshots are a manual process - the user has to expressly create a snapshot when they want it.
What I was thinking of was a virtual device that allocated a new sector whenever an old one was overwritten - kind of like a journaled filesystem, but without the filesystem, (I.E. just the journal) :-).
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