[pywin32-bugs] [ pywin32-Bugs-1517601 ] WNetGetUser fails if connection is specified

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Bugs item #1517601, was opened at 2006-07-06 01:52
Message generated for change (Comment added) made by mhammond
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Category: pythonwin
Group: None
Status: Open
Resolution: None
Priority: 5
Submitted By: rberrett (rberrett)
Assigned to: Nobody/Anonymous (nobody)
Summary: WNetGetUser fails if connection is specified

Initial Comment:
When trying to run WNetGetUser with connection (drive 
letter) supplied, raise a "Couldn't get the buffer 
size!" runtime errror


Example:
username = win32wnet.WNetGetUser( "z:" ) 


NOTE: This appears to be a caused by an inconstancy in 
they windows WNetGetUser call.  The win32wnet wrapper 
calls WNetGetUser with NULL in the username argument 
to get the buffer size.  But unless the connections 
(lpName) is also NULL the length is does not appear to 
be set 

Following sets the length correctly:
WNetGetUser(NULL, NULL, &length );

Following fails to set the length:
WNetGetUser("v:", NULL, &length );



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>Comment By: Mark Hammond (mhammond)
Date: 2006-09-23 00:41

Message:
Logged In: YES 
user_id=14198

Is it possible the share is connected with *no* user - ie,
anonymously?  Its not obvious to me how to set that up to
test though...

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Comment By: rberrett (rberrett)
Date: 2006-08-09 23:56

Message:
Logged In: YES 
user_id=1121829

With build 209, WNetGetUser now always gived the following:

error: (234, 'WNetGetUser', 'More data is available.')

Even on mounts that NetUseGetInfo info is retruned correctly.

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Comment By: Roger Upole (rupole)
Date: 2006-07-30 14:18

Message:
Logged In: YES 
user_id=771074

Can you try this with build 209 and see what error you get 
back now ?


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Comment By: rberrett (rberrett)
Date: 2006-07-07 23:52

Message:
Logged In: YES 
user_id=1121829

I tried this against a few systems, both Windows XP and Unix
based, with the same results

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Comment By: Roger Upole (rupole)
Date: 2006-07-07 18:20

Message:
Logged In: YES 
user_id=771074

What type of systems provide the shares that the local 
drives are mapped to ?

I also added WNetGetLastError to win32wnet, in case 
extended error info is available from them.
 

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Comment By: rberrett (rberrett)
Date: 2006-07-07 00:34

Message:
Logged In: YES 
user_id=1121829

Versions:
python 2.4.2
win32 2.4.205.0
OS: Windows XP ServicePack 2

NetUseGetInfo is giving good information, but GetUser still
seems to be failing.  I have tried this one a couple of our
test machines.  I have attached a small test program I used
to to examine the problem I was having.  Here is a sample of
the output:


X: Microsoft Windows Network \\b3server3\storage_1
  NetUseGetInfo: {'remote': u'\\\\b3server3\\storage_1',
'local': u'X:'}
  WNetGetUser:   Couldn't get the buffer size!
  
W: Microsoft Windows Network \\nssgsvr\test
  NetUseGetInfo: {'remote': u'\\\\nssgsvr\\test', 'local':
u'W:'}
  WNetGetUser:   Couldn't get the buffer size!

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Comment By: Mark Hammond (mhammond)
Date: 2006-07-06 16:38

Message:
Logged In: YES 
user_id=14198

My experience is exactly the same as Roger's - it works fine
for an existing connection.  I tried XP and (thanks to
vmware!) Win98.

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Comment By: Roger Upole (rupole)
Date: 2006-07-06 15:23

Message:
Logged In: YES 
user_id=771074

I can't reproduce this with an existing connection on Win2k 
or WinXP.  What OS and python/pywin32 versions do you have ?
Also, could you verify that the mapped drive exists under 
the current user by adding this line before WNetGetUser:
print win32net.NetUseGetInfo(None,'v:') (or z:, or 
whichever drive letter you're passing to WNetGetUser)

     Roger


      Roger


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Comment By: rberrett (rberrett)
Date: 2006-07-06 05:48

Message:
Logged In: YES 
user_id=1121829

I see this with any existing mapped drive letters.  

The only time I do not get this message is if I do not
specify the connection.

username = win32wnet.WNetGetUser()




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Comment By: Roger Upole (rupole)
Date: 2006-07-06 05:01

Message:
Logged In: YES 
user_id=771074

I see this too, but only if a nonexistent connection is
passed to it.  Do you get this error if you pass a drive 
letter that's actually mapped ?
The first call for the buffer size isn't checking the 
returned error code.  I'll check in a fix shortly.

      Roger


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