[TESTERS needed] New POSIX permission handling

Sat Apr 11 12:36:00 GMT 2015

On 11. 4. 2015 11:59, Corinna Vinschen wrote:
>> Out of curiosity, does the code somehow distinguish ACLs that don't
>> have these default permissions (or have different permissions set for
>> SYSTEM / Administrators)?
>> I don't quite understand the question.
>> For a start, I'd like to point out how POSIX ACLs are supposed to work.
> http://linux.die.net/man/5/acl is a good start. This is our role model.

I'm gonna read that.
> The new code will compute the mask the same way as before, but it
> skips the permissions of SYSTEM and Administrators while doing that.
> That means, the POSIX group permission bits are not affected by
> the Windows-typical permissions of SYSTEM and Administrators.
>> Example:
>> User rw-
> Primary group r--
> Other user rw-
> Other group r--
> SYSTEM rwx
> Everyone ---
>> The computed POSIX MASK/CLASS_OBJ value in Cygwin 1.7.35 is the sum
> of all group and secondary user permissions
>> rw- | r-- | rwx == rwx
>> The new code ignores SYSTEM, thus the mask is
>> rw- | r-- == rw-
>> Does this explain it sufficiently?

Yes, thank you. My question was about the case where SYSTEM or Administrator doesn't have the typical permissions. From this explanation, I assume that I won't be able to see any difference in the mask in that case, but it doesn't seem to be a bad thing.
-- 
David Macek
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