[Acl-Devel] Calculating effective ACLs

[Jake Goulding]

I have a sticky situation where I would like to get the effective ACL 
for a file. For example:

GROUP 1: a, b, c
GROUP 2: b, d, e
GROUP 3: b

If I have this directory structure:
/alpha/beta/omega/file.txt

with the following permissions:
alpha is root:group1 - 0770
beta is apache:group2 - 0770
omega is b:group3 - 0770
file.txt is b:group1 - 0777

Now, if I use the ACL functions, I will see that b, group2, and other 
can all read this file.
However, no one but b can get into omega, no one but apache and group2 
can get into beta, and root and group1 can get into alpha.

So, realistically, only b can get to the file, as no one else has 
execute permissions all the way to that file. Is there some way I can 
calculate who these people are?

Thanks!

-- 

JAKE GOULDING
Software Engineer
goulding at vivisimo.com

Viví­simo [Search Done Right™]
1710 Murray Avenue
Pittsburgh, PA 15217 USA
tel: +1.412.422.2499 x105
fax: +1.412.422.2495
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