ACLs in kernel 2.6.22.18 ?

[guepe]

Thanks all !
The problem is : after setting gid bit, like this
drwxrwsr-x 4 root      nasuser    4096 2009-09-20 21:33 public

Notice the 's' bit ;-) and my users belonging to nasusuer group

etienne@debian:/home$ groups
etienne nasuser

etienne@debian:/home/public$ pwd
/home/public

If i create a file

etienne@debian:/home/public$ echo 1 > test

Then try to modify it with another user belonging to nasusuer group

daniel@debian:/home/public$ groups
daniel nasuser
daniel@debian:/home/public$ echo 2 >> test
bash: test: Permission denied

daniel@debian:/home/public$ ls -l test
-rw-r--r-- 1 etienne nasuser 2 2009-09-23 17:11 test

It _does not_ work ! Why ? I must have forgotten something ?!

[DamonHD]

You will also need to ensure that users' umasks are sufficiently permissive to allow group writes, so that creating a file in that directory gets mode 664 or 660 or 775 (XX7 is not a good idea).

Rgds

Damon

[guepe]

I did a chmod -R 775 public as root

But, when creating a file in this directory, the file has rights 755, so read only for group, so another user can't write to it.

What is still missing ?
Thank you _very_ much for you help

[birdman]

What is still missing ?

The umask of the creating process has to be x0x.  Nothing you can set on the directory permissions controls what is set on an newly-created entry permission.

[guepe]

I am not so sure to perfectly understand (english is not my native language). Do you mean that we can't control the permissions assigned by newly created files ?
So there are no solutions ?? THere must be one nice solution, forcing that all created files in a directory being 775 permissions !?

[tinker]

Read either

man umask

or

http://www.kernel.org/doc/man-pages/online/pages/man2/umask.2.html

and then read

http://www.linuxsecurity.com/content/view/117255/

[guepe]

You were right : applying an umask of 007 make all files and directoyies newly created being with rights rwxrwx---

Thanks all !