Resolving '????????' users and groups

[Wes Barris]

Andrew DeFaria wrote:
> 
> On 03/01/2010 09:57 PM, Wes Barris wrote:
>> I'm trying to find a solution for my files being listed with '????????'
>> as the owner and group:
>>
>> -rw-r--r-- 1 ???????? ????????  137894 2010-02-25 11:34 1536.gff
>>
>> The following page partially addresses this:
>>
>> http://www.cygwin.com/cygwin-ug-net/ntsec.html
>>
>> It says that:
>>
>> --------------------------
>> If another user (or a Windows group, treated as a user) is not present
>> in /etc/passwd, the uid of that user will have a special value of -1
>> (which would be shown by ls as 65535). The user name shown in this
>> case will be '????????'.
>> --------------------------
>>
>> I would like to modify the /etc/passwd file so that it shows me
>> as the owner of these files instead of '????????'.  That page
>> shows how /etc/passwd is used to create a mapping between Windows
>> Security SIDs and Cygwin uids.
>>
>> How do I find/list the Windows SIDs of these files so that I can
>> create the proper mapping in /etc/passwd?
> How about:
> 
> $ mkpasswd -d >> /etc/passwd
> $ ls -l <file>
> 
> and see who owns it?

mkpasswd -d would return all of the domain users (we have thousands).
However, I know that these files are not owned by anyone else.
The files in question are coming from a samba share (mapped network
drive) served from a Linux system.

Isn't there a way so see the SID of a file?

-- 
Wes Barris
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