[Samba] Force set group id on samba domain member

[Rowland Penny]

On Tue, 24 Jul 2018 14:38:31 +0200
Michal via samba <samba at lists.samba.org> wrote:

>   Samba DM config below.
>   Directories with setgid:
> 
> $ll /home4/group
> total 32
> drwxrws--- 7 NIS\nisadmin NIS\audio      4096 Jul 24 14:14 audio
> drwxrwx--- 2 NIS\nisadmin NIS\dok-sprava 4096 Jul 21 09:23 dok-sprava
> drwxrwx--- 2 NIS\nisadmin NIS\poj        4096 Jul 23 08:38 poj
> drwxrwx--- 2 NIS\nisadmin NIS\projekty   4096 Jul 23 09:14 projekty
> 
>   When user creates file/dir directly on linux, the files has correct
> group:
> 
> $ mkdir /home4/group/audio/test1dir
> $ touch /home4/group/audio/test1file
> $ ll /home4/group/audio
> total 4
> drwxr-sr-x 2 NIS\test1 NIS\audio 4096 Jul 24 08:15 test1dir
> -rw-r--r-- 1 NIS\test1 NIS\audio    0 Jul 24 08:16 test1file
> 
>   But when the same user creates files when logged into windows:
> 
> windows:
> T:\audio>mkdir test1dir2
> T:\audio>echo test > test1file2
> 
> linux:
> 
> $ll /home4/group/audio
> total 40
> drwxr-sr-x  2 NIS\test1    NIS\audio        4096 Jul 24 08:15 test1dir
> drwxrwsr-x+ 2 NIS\test1    NIS\domain users 4096 Jul 24 12:35
> test1dir2 -rw-r--r--  1 NIS\test1    NIS\audio           0 Jul 24
> 08:16 test1file -rwxrwxr-x+ 1 NIS\test1    NIS\domain users    7 Jul
> 24 12:35 test1file2
> 
>   there is "NIS\\domain users" group instead of expected and needed
> "NIS\\audio" group.

This is to be expected with your smb.conf

> 
>   Where can be the problem?
> 
>   Thanks, Michal
> 
> smb.conf on samba4 DM:
> [global]
>   security = ADS
>   workgroup = NIS
>   realm = uhn.nemuh.cz
>   winbind offline logon = yes
>   winbind enum users = yes
>   winbind enum groups = yes
> ..
>   log file = /var/log/samba/%m.log
>   log level = 1
> 
>   idmap config * : backend = tdb
>   idmap config * : range = 10000-19999
>   idmap config ad
> 
>   # idmap config for the NIS domain
>   idmap config NIS:backend = ad
>   idmap config NIS:schema_mode = rfc2307
>   idmap config NIS:range = 100-9999
>   idmap config NIS:unix_nss_info = yes

try adding:

    idmap config NIS:unix_primary_group = yes

Rowland