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Fwd: inode open
Begin forwarded message:
From: Adam Burkepile <sadpoti%gmail.com@localhost>
Date: July 16, 2008 2:30:54 PM PDT
Subject: Re: inode open
On Jul 16, 2008, at 1:34 PM, Jason Thorpe wrote:
On Jul 16, 2008, at 7:47 AM, Matt Thomas wrote:
Besides the fhopen(2) previously mentioned, this isn't available
because it would break the security used by unix.
Other Unix-like platforms (Mac OS X) can do this without breaking
the Unix security model. We should be able to, too.
Of course, a good starting point for Adam is -- "What do you need
Yes, I asked because was searching for the functions to do this and
found a webpage that had this information:
Under Mach there were the following system calls for this purpose:
iopen(dev, inode) -- return a filehandle for file inode on device dev.
icreate(dev) -- returns the inode number of a new file on device dev.
istat(dev, inode, statb) -- fill in the statb structure.
iinc(dev,inode) -- increase the disk link count of the file
idec(dev, inode) -- decrease the disk link count (remove file when 0).
and wanted to find an equivalent function(s) in NetBSD.
I need this functionality because the way I was going to implement
subfiles is have the basefile inode structure hold a new field,
which is the inode number of the "subfile directory". This directory
would hold the basefile's subfiles.
So, what I really should of asked, "Is there a way of opening up a
directory (not a regular file) based on the inode number, like a
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