samba - Sep 2008 - Inexistant file displayed by samba

Hello, 
Running 3.2.0, and in one of my share, a file named TABAFK~V
appeared, but is not present on the underlying filesystem. 

The file can't be removed from a windows client (even a member of
domain admins). 

Not that it is distrubing, but you know... 
Fran?ois

> Hello,
> Running 3.2.0, and in one of my share, a file named TABAFK~V
> appeared, but is not present on the underlying filesystem.
>
> The file can't be removed from a windows client (even a member of
> domain admins).
>
> Not that it is distrubing, but you know...
You want disturbing ?

On my Samba 3.2.2 server I cd to a directory that is shared out as some
share named "share" :

# pwd
/opt/winshare/test_stuff
# echo "foo" > con
# chown smbtest:samba con
# ls -l con
-rw-r--r--   1 smbtest  samba          4 Sep  4 12:08 con

Back at my 64-bit Windows Vista ( Business Edition ) machine I see :

Microsoft Windows [Version 6.0.6000]
Copyright (c) 2006 Microsoft Corporation.  All rights reserved.

C:\Users\dclarke>net view \\FOSSIL
Shared resources at \\FOSSIL

Samba 3.2.2

Share name  Type  Used as  Comment

---------------------------------------------------------
share       Disk  (UNC)    writable share
ultra       Disk           external seagate
The command completed successfully.


Is the Samba server running fine and doing what it should?
Yes it is :

# /opt/csw/bin/smbstatus

Samba version 3.2.2
PID     Username      Group         Machine
-------------------------------------------------------------------
15585     smbtest       samba         ultra20      (192.168.35.4)

Service      pid     machine       Connected at
-------------------------------------------------------
share        15585   ultra20       Wed Sep  3 22:40:41 2008
ultra        15585   ultra20       Wed Sep  3 23:19:10 2008
IPC$         15585   ultra20       Wed Sep  3 22:40:41 2008

Locked files:
Pid          Uid        DenyMode   Access      R/W        Oplock          
Share
Path   Name   Time
----------------------------------------------------------------
15585        12345      DENY_NONE  0x100001    RDONLY     NONE            
/export/smbd/ultra20   .   Wed Sep  3 23:21:47 2008
15585        12345      DENY_ALL   0x6019f     RDWR       EXCLUSIVE+BATCH 
/export/smbd/ultra20   VMware/s10u5/mercury/Solaris 10 64-bit-f007.vmdk  
Thu Sep  4 12:06:26 2008

So let's take a look at that new file called "con" on that share :

C:\Users\dclarke>dir \\FOSSIL\share\test_stuff\
 Volume in drive \\FOSSIL\share is share
 Volume Serial Number is 09FC-04E7

 Directory of \\FOSSIL\share\test_stuff

09/04/2008  12:08 PM    <DIR>          .
09/03/2008  10:18 PM    <DIR>          ..
12/30/2007  08:15 PM                19 text.txt
11/18/2007  07:32 PM         2,970,312 817-5093.pdf
12/03/2007  01:58 PM         3,342,666 Sun Studio 11 C Users Guide
819-3688-10.pdf
11/25/2007  11:43 PM         2,099,796 Sun Studio 12 C Users Guide
819-5265.pdf
12/17/2007  11:01 PM         3,380,801 Sun Studio 8 C User's Guide
817-5064.pdf
08/25/2008  05:49 PM    <DIR>          select
09/03/2008  10:56 PM           146,093 samba_322_sparc20_sol8.jpg
09/04/2008  12:08 PM                 4 CSHOFG~F
               7 File(s)     11,939,691 bytes
               3 Dir(s)     109,947,904 bytes free


See a funny looking file ( CSHOFG~F ) there ?  It sure is not named
"con"
now is it? How did the name change?  Did the name change ?

Let's go look at the Samba server :

# pwd
/opt/winshare/test_stuff
# ls -l
total 23452
-rwxr--r--   1 smbtest  samba    2970312 Nov 18  2007 817-5093.pdf
-rwxr--r--   1 smbtest  samba    3342666 Dec  3  2007 Sun Studio 11 C
Users Guide 819-3688-10.pdf
-rwxr--r--   1 smbtest  samba    2099796 Nov 25  2007 Sun Studio 12 C
Users Guide 819-5265.pdf
-rwxr--r--   1 smbtest  samba    3380801 Dec 17  2007 Sun Studio 8 C
User's Guide 817-5064.pdf
-rw-r--r--   1 smbtest  samba          4 Sep  4 12:08 con
-rwxr-xr-x   1 smbtest  samba     146093 Sep  3 22:56
samba_322_sparc20_sol8.jpg
drwxr-xr-x   2 smbtest  samba       3584 Aug 25 17:49 select
-rw-r--r--   1 smbtest  samba         19 Dec 30  2007 text.txt

Well golly gee .. the file named "con" is still there on the Samba
server
and it looks fine but Vista can not see it and will not deal with it.

Must be a bug in Samba ?

Not bloody likely.

You should look on your Samba server to see if there are funny looking
three letter files named "con" or "com" or such.

Dennis

>> You should look on your Samba server to see if there are funny looking
>> three letter files named "con" or "com" or such.
>
> con is a DOS reserved name. That's why Samba mangles it.
right .. I knew that but you missed the point.

The point, to be pedantic and clear here, is that Microsoft *should* be
well past the days of that DOS restriction.

Where in the samba code is this mangle done? Perhaps it is a worthwhile
experiment to not mangle it.

Dennis

> On Thu, Sep 4, 2008 at 12:55 PM, Dennis Clarke
<dclarke@blastwave.org>
> wrote:
>>>> You should look on your Samba server to see if there are funny
looking
>>>> three letter files named "con" or "com" or
such.
>>>
>>> con is a DOS reserved name. That's why Samba mangles it.
>>
>> right .. I knew that but you missed the point.
>>
>> The point, to be pedantic and clear here, is that Microsoft *should* be
>> well past the days of that DOS restriction.
>>
> It is not. I guess they do not want to cut off some backward
> compatibility. I mean try to create a directory named CON in windows
> XP. I just did and it called it New Folder instead of CON.
Seems insane. On the one hand Microsoft is notorious for breaking
compatibility in things like MS-Word but drags around this DOS console
thing from 1984. Maybe even earlier.

Personally I see it as a bug in Microsoft DOS 6.22 that never went away.

Dennis