Re: Intercepting system calls

[Jiri Kosina]

On Thu, 22 Dec 2011, Wakko Warner wrote:

> > Oh. I will not do it then, could you suggest me something so that I
> > could prevent unlink on some file say using kernel support. I want to
> > save file on unlink how could I do that without kernel support, or how
> > could I do that using a kernel module.
> 
> I wrote a library that can be loaded in userspace that does this.  It's not
> very polished, but it works for me.  I use it for rsync when I want files
> "deleted" but not from the filesystem.  It creates a .deleted directory in
> the $PWD.

I don't see a way how library could cover any arbitrary userspace process 
issuing unlink() (consider statically linked binaries, for starters).

-- 
Jiri Kosina
SUSE Labs

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