Re: [Moosefs-users] setgid bit

[Michał B. <mic...@ge...>]

Hi!

 

Unfortunately POSIX dosen’t give any clear specification on this subject. MooseFS behaves in a way which is found in most other systems and to be honest is the safest one. 

 

For example at Max OS X (HFS+) we have:

(acid: </tmp/aqq>) $ mkdir dir1

(acid: </tmp/aqq>) $ ls -ld dir1

drwxr-xr-x  2 acid  wheel  68 Dec 13 21:15 dir1

(acid: </tmp/aqq>) $ chmod g+s dir1

(acid: </tmp/aqq>) $ chgrp staff dir1

(acid: </tmp/aqq>) $ ls -ld dir1

drwxr-xr-x  2 acid  staff  68 Dec 13 21:15 dir1

(acid: </tmp/aqq>) $ cd dir1

(acid: </tmp/aqq/dir1>) $ mkdir dir2

(acid: </tmp/aqq/dir1>) $ ls -ld dir2

drwxr-xr-x  2 acid  staff  68 Dec 13 21:15 dir2

 

And at FreeBSD 7.x (UFS) we have:

[acid@fbsd7 /tmp/aqq]$ mkdir dir1

[acid@fbsd7 /tmp/aqq]$ ls -ld dir1

drwxr-xr-x  2 acid  wheel  512 Dec 13 21:18 dir1

[acid@fbsd7 /tmp/aqq]$ chmod g+s dir1

[acid@fbsd7 /tmp/aqq]$ chgrp users dir1

[acid@fbsd7 /tmp/aqq]$ ls -ld dir1

drwxr-xr-x  2 acid  users  512 Dec 13 21:18 dir1

[acid@fbsd7 /tmp/aqq]$ cd dir1

[acid@fbsd7 /tmp/aqq/dir1]$ mkdir dir2

[acid@fbsd7 /tmp/aqq/dir1]$ ls -ld dir2

drwxr-xr-x  2 acid  users  512 Dec 13 21:18 dir2

 

 

The behaviour of sgid bit described in your email is probably only on Linux. In the future we could think of "LINUX SUGID COMPATIBILITY" config option.

 

 

Kind regards

Michał Borychowski 

MooseFS Support Manager

_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _

Gemius S.A.

ul. Wołoska 7, 02-672 Warszawa

Budynek MARS, klatka D

Tel.: +4822 874-41-00

Fax : +4822 874-41-01

 

From: Sébastien Morand [mailto:seb...@gm...] 
Sent: Tuesday, December 13, 2011 7:42 PM
To: moo...@li...
Cc: Aleksandra Rudnitska; Aleksandra Rudnitska
Subject: 

 

Hi,

I'm currently using the mfs-1.6.20-2 and figured out that the setgid bit is not correctly handled.

$ groups
toto test
$ cd $HOME
$ mkdir dir1
$ ls -ld dir1
drwxr-xr-x 2 toto toto 4096 Dec 13 18:36 dir1
$ chmod g+s dir1
$ chgrp test dir1
$ ls -ld dir1
drwxr-xr-x 2 toto test 4096 Dec 13 18:36 dir1
$ cd dir1
$ mkdir dir2
$ ls -ld dir2
drwxr-xr-x 2 toto test 4096 Dec 13 18:36 dir2

dir2 should have the setgid bit set, here it is the expected result :
$ ls -ld dir2
drwxr-sr-x 2 toto test 4096 Dec 13 18:36 dir2

I'm attaching the patch for interested people. Only the mfsmaster is concerned. Sorry if this is corrected in later version.

Regards,
Sebastien