Ways to overlay ACLs into existing OSes (was: Re: Filesystem with ACLs (fwd))

[Robert Watson]

On Fri, 1 Oct 1999, Casey Schaufler wrote:

> Robert Watson wrote:
> 
> > I must admit, however, that I was impressed to find the ACL support in the
> > default Solaris file system :-).
> 
> They're in Irix, too.

As I'm about to start looking into adding ACL support to FreeBSD, I am
curious about how you chose to integrate the ACL structures into the base
FS--if one goes for the "whole hog" integration, presumably one has to
find space somewhere--we have been throwing around modifying inodes,
adding an additional "ACL" block, adding support for file forks and using
an "ACL" fork for the ACL, etc.  About how large does the supporting data
end up being?

And as has been observed, Solaris differs from the POSIX.1e draft--did you
follow it to the letter, or were there changes you needed to make?

  Robert N M Watson 

robert at fledge.watson.org              http://www.watson.org/~robert/
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TIS Labs at Network Associates, Safeport Network Services


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