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Date: Sat, 19 Jan 2002 13:16:00 +0100
From: Matthias Schniedermeyer <ms@citd.de>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: rm-ing files with open file descriptors
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> > Well no. new_fd will refer to a completely new, empty file
> > which has no relation to the old file at all.
> > 
> > There is no way to recreate a file with a nlink count of 0,
> > well that is until someone adds flink(fd, newpath) to the kernel.
> > 
> 
> This *might* work:
> 
> link("/proc/self/fd/40", newpath);

cat /proc/<id>/fd/<nr> > whatever
actually works.

"Even Better(tm)" would be if
ln /proc/<id>/fd/<nr> whatever
or
ln <Inode> whatever (lsof delivers the needed Inode-nr)
would work.

Otherwise you have a problem to recover files when you have insufficent
disc space. Imagine a file that is 1GB in size and you have 512MB left
on the hdd. Currently i don't see a chance to recover such a file
without problems.





Bis denn

-- 
Real Programmers consider "what you see is what you get" to be just as 
bad a concept in Text Editors as it is in women. No, the Real Programmer
wants a "you asked for it, you got it" text editor -- complicated, 
cryptic, powerful, unforgiving, dangerous.

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