packed permission bits in file systems?

[Jeffrey Watts]

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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