Multiple Group Priveleges on same directory?


 
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# 1  
Java Multiple Group Priveleges on same directory?

On my FTP server (Darwin/Mac OS X -- pretty much FreeBSD), I need to apply the following permissions to a directory:

1. A specific owner with full access
2. A specific group with full access
3. A specific group with read-only access
4. No access whatsoever for everyone else

I understand how to apply permission for the owner (1.), the first group (2.), and everyone else (4.)....

Code:
chown owner:group1 dirname
chmod 770 dirname

What I don't get is how to apply read only access for my second group (3.). I feel certain that I a missing something big here. Can anyone help?
# 2  
i dont know if mac osx has ACL's but if it does try man acl or man setfacl
# 3  
Thanks for the response, but it looks like darwin doesn't have those utilities available.

Code:
<pre>[localhost:~] % man acl
man: no entry for acl in the manual.
[localhost:~] % man setfacl
man: no entry for setfacl in the manual.</pre>

What is acl? Is that a Linux thing?
# 4  
access control lists. its a solaris thing.
# 5  
Modern Linux distributions also carry support for ACL's, although it's not used as much as it should be.
# 6  
Not only solaris, HP-UX has them as well Smilie
 

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