samba - Apr 2006 - Set "setuid" bit on a Solaris server from a Windows client

Dear all,

I'm running Samba version 3.0.4 (this is what comes with Solaris 10) on a
Solaris machine. For WORM file system support, a new
"Snaplock"-mechanism has been implemented into SAM-FS. This mechanism
uses the setting of the "setuid" bit (e. g.: "chmod 4000
<filename>") to trigger a file to become a WORM file (i. e. it cannot
be modified / deleted before a "retention period" is over).
Is there a way to trigger this bit from a Windows client? (As to my knowledge
Windows is not aware of the existence of this "setuid" bit, thus it
can't trigger it. Right?)

Other implementations of a CIFS protocol stack work as follows: In order to
trigger the "setuid" bit, the Windows client sends an "attrib
+s-r <filename>" (set system attribute and set file to read only).
The server intercepts this command and flips the S-bit (-rw-r--r-- becomes
-r-Sr--r--).
As to my understanding, for Samba this would require a slight modification in
smbd/dismode.c (at least this is what I read from the debug log).

Anybody else ever came across this problem? Any solution, comments, thoughts...

Kind regards

Karsten


Karsten Bolz
Storage Architect
Sun Microsystems GmbH
Data Management Group
Phone: +49 6196 9568-264
Fax: +49 6196 9568-293