Permissions for new directory and file on Samba when connecting through mac osx

Question

I'm using ubuntu server 10 and I have this configuration in my smb.conf:

[www]
        comment = Web files
        path = /var/www
        browsable = yes
        writeable = yes
        create mask = 0775
        directory mask = 0775
        valid users = @developers

When I connect trough MAC OSX machine and create a file or directory the permissions are set with 755.

Why?

Answer 1

The "create mask" simply means that samba users are allowed to modify those permissions up to the mask, meaning if you set it to 777, then the user can modify all bits. This is not the same as unix file masks. Your setting is 0775, meaning that users can modify the permissions on User (rwx), Group (rwx) and Other (rw). This doesn't mean that the files will be created with those permissions, just that the user can use those permissions. To force a set of permissions, use something like:

security mask = 0550
force security mode = 0550
directory security mask = 0550
force directory security mode = 0550

What permissions were you trying to achieve btw?

Answer 2

After a while I figure it out setting this global variable: unix extensions = off

http://discussions.apple.com/thread.jspa?messageID=7349655