Seth David Schoen
Wed Feb 6 01:21:01 PST 2002
Don Marti writes:
> (Asking how to do file undelete is of course highly non-elitist,
> since the true elitist thing to do is come up with a good reason
> why you didn't need the file, and _meant_ to clobber it.)
> The following is an idea for a way to do undelete.
> 1. Kernel level: If a system call would clobber a file, spew that
> file's meta-info, then contents out a /proc entry before doing
> the work. System calls to intercept and check include unlink(2),
> open(2), and rename(2).
You can experiment with what your system would be like in this case by
-- patch your kernel interfaces in userspace with Python.
There is also a nice LD_PRELOAD trick which lets you rewrite part of
your C library without actually upgrading it. We need a "trapping,
tracing, and rewriting section 3 and section 2 calls from programs
without actually being a libc or kernel hacker" HOWTO.
Seth David Schoen <firstname.lastname@example.org> | Reading is a right, not a feature!
http://www.loyalty.org/~schoen/ | -- Kathryn Myronuk
More information about the linux-elitists