[Samba] chmod and unix extensions

[B Linky]

Dear all,

Im trying to set up Samba so that linux users can use the new unix
extensions to be able to chmod their files as they wish. However I
seem to be having problems with masks.

Whether using smbfs or smbclient trying to do: chmod 777 testfile
results only in read permissions for group and other (ie it ends up
744). Under smbfs it complains:

  chmod: changing permissions of `testfile' (requested: 0777, actual:
0744): Operation not permitted

The only way I can it to work is to set "create mask = 0777" in the
server's smb.conf. Now, this is confusing me as the file isnt being
created, I'm just trying to chmod an existing file. I dont want to
leave the setting as this because of course all new files get created
with world read-write which is not what I want.

Looking at the unix_perms_from_wire() function, it would seem it is
indeed applying the create mask.

As an aside, changing permissions from a W2K ACL dialogue seems to work fine.

Any ideas anyone?

Samba version: 3.0.4

Some relevant settings from smb.conf:

# testparm -v | egrep '(force|security|mask|unix extensions)'
Load smb config files from /usr/local/samba/samba-3.0.4/lib/smb.conf
Processing section "[homes]"
Loaded services file OK.
Server role: ROLE_STANDALONE
Press enter to see a dump of your service definitions

        security = USER
        unix extensions = Yes
        paranoid server security = Yes
        force user = 
        force group = 
        create mask = 0744
        force create mode = 00
        security mask = 0777
        force security mode = 00
        directory mask = 0755
        force directory mode = 00
        directory security mask = 0777
        force directory security mode = 00

debug log file gives:
[2004/07/20 13:10:44, 10, pid=24949, effective(6923, 18), real(0, 0)]
smbd/trans2.c:call_trans2setfilepathinfo(3392)
  call_trans2setfilepathinfo: SMB_SET_FILE_UNIX_BASIC: name = testfile
size = 39, uid = 4294967295, gid = 4294967295, raw perms = 0100777
[2004/07/20 13:10:44, 10, pid=24949, effective(6923, 18), real(0, 0)]
smbd/trans2.c:call_trans2setfilepathinfo(3454)
  call_trans2setfilepathinfo: SMB_SET_FILE_UNIX_BASIC setting mode
0744 for file testfile