[ale] Ghost SGID on extract?

[Leam Hall]

Sorry for the late response, it's been a busy few days.

Yup, already checked the tar file, it has the SGID set. I understand why a user's untar would remove the permissions, otherwise they could add a root SGID file to the system. However, I'm not sure why the second untar by root removes it.

Leam

On 6/30/21 12:16 PM, Bob Toxen wrote:
> Have you tried "tar -tvf foo.tar" to see what the permissions are in
> the archive?  That will determine what they are for each created file.
> 
> If memory serves tar does not usually change the permissions or ownership
> on extraction if the file (or dir, etc.) exist.  This would explain
> your experience.
> 
> Bob Toxen
> bob at verysecurelinux.com               [Please use for email to me]
> Retired from Quality Linux & UNIX security and SysAdmin & software
>     consulting since 1990.
> Retired from Quality spam and virus filters.
> 
> "One disk to rule them all, One disk to find them. One disk to bring
> them all and in the darkness grind them. In the Land of Redmond where
> the shadows lie...and the Eye is everwatching"
> -- The Silicon Valley Tarot Henrique Holschuh with ... BobT's enhancement
> 
> On Tue, Jun 29, 2021 at 03:23:50PM -0500, Leam Hall via Ale wrote:
>> Okay, I've never seen this before.
>>
>> 1. tar.gz file built by root, permissions do not include SGID flag on base directories.
>> 2. Extract as user, no problem on multiple OS (Linux, Mac) versions.
>> 3. Extract as root, some of the directories are SGID.
>> 4. Extract the same tar.gz file over the first extraction, and the dirs are no longer SGID.
>>
>> What could cause this?
>>
>> Leam
>>
>> -- 
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Scribe: The Domici War     (domiciwar.net)
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