I have a ubuntu server sharing some folders using samba. When a client creates a new folder or file, the permissions aren't set according to the settings in smb.conf.

My current settings for a specific share:

[share]

    path = /mnt/share

    browsable = yes

    guest ok = no

    writable = yes

    read only = no

    create mask = 0774

    directory mask = 0774

    write list = netuser

When a samba client (a windows 7 box) uses the 'netuser' account to create a file or directory, the permissions become

drwxr-sr-- 2 netuser sambashare      4096 2012-01-22 21:14 New folder

-rwxrw-r-- 1 netuser sambashare         0 2012-01-22 21:07 New Text Document.txt

The parent directory has the set group id flag, thus the sambashare group owner. The idea is that both samba users and server users belong to the sambashare group, and thus are to be able to edit, delete, and create files and directories. However, since created folders doesn't have the write flag for group set, server users cant create new files or folders in those folders without sudo.

i have tested adding and removing the directory mask, force directory mode, directory security mode, and the force directory security mode, but the behaviors still remains. Newly created files and folders doesn't get intended 774 permission, but rather 764 and 754 respectively.

What am I missing? Why doesn't samba set the correct permissions?