packed permission bits in file systems?

[Billy Crook]

Maybe David's thinking of a+x.  That would do what he's talking about.
 I've never heard of 'packed permissions'.

On Thu, Jun 3, 2010 at 14:47, Andrew Beals <andrew.beals at gmail.com> wrote:
> It's definitely not nor has ever been a feature of The One True Unix(tm).
>
> Never saw it on linux, either.
>
> On 6/3/10, Jeffrey Watts <jeffrey.w.watts at gmail.com> wrote:
>> I don't recall that ever being used on Linux - at least from ext2 onwards.
>> I also don't recall ever working on any other Unix that did that either.
>> Perhaps it's a minimal or special-case filesystem option for some OSes?
>>
>> Jeffrey.
>>
>> On Thu, Jun 3, 2010 at 1:09 PM, David Nicol <davidnicol at gmail.com> wrote:
>>
>>>
>>> http://en.wikipedia.org/wiki/Talk:Filesystem_permissions#Packed_permission_bits.3F
>>>
>>>
>>> Clearly, ext3 has moved beyond "packed permission bits" if that ever
>>> was a production concept.
>>>
>>>
>>> [david at hexaflexagon scrabble]$ touch BLOP
>>> [david at hexaflexagon scrabble]$ ls -l BLOP
>>> -rw-r--r-- 1 david david 0 Jun  3 04:11 BLOP
>>> [david at hexaflexagon scrabble]$ chmod o+x BLOP
>>> [david at hexaflexagon scrabble]$ ls -l BLOP
>>> -rw-r--r-x 1 david david 0 Jun  3 04:11 BLOP
>>> [david at hexaflexagon scrabble]$
>>>
>>> Under packed permissions, granting for OTHERS would grant for USER and
>>> GROUP too.
>>>
>>> Here's my question: When did packed permissions stop being used, if
>>> they ever were?
>>> Does anyone else remember "chmod o+w foo" silently implying "chmod
>>> ugo+w foo" and if so how log ago was that?
>>>
>>>
>>> --
>>> "I'm not giving in an inch to fear" --David Crosby
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>>
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