[pywin32-bugs] [ pywin32-Bugs-3009827 ] QueryDosDevice fails with error 234

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Bugs item #3009827, was opened at 2010-06-01 11:17
Message generated for change (Comment added) made by andersjm
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Category: win32
Group: None
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Anders J. Munch (andersjm)
Assigned to: Nobody/Anonymous (nobody)
Summary: QueryDosDevice fails with error 234

Initial Comment:
After attaching an additional USB device, win32file.QueryDosDevice(None) suddenly started failing with the exception:
        pywintypes.error: (234, 'QueryDosDevice', 'Der er flere data til r\xe5dighed.')
Error 234 is ERROR_MORE_DATA, which indicates that the supplied buffer is too small. (The text translates to 'More data is available.)
Looking at win32file.i, MyQueryDosDevice expects a too small buffer to result in ERROR_INSUFFICIENT_BUFFER; so presumably treating ERROR_MORE_DATA as synonymous will fix it.

(Python 2.4.4, pywin32-208.)

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Comment By: Anders J. Munch (andersjm)
Date: 2010-06-03 21:35

Message:
XP.  
To reproduce you need for len(win32file.QueryDosDevice(None)) to exceed
the initial buffer size of 8192 - or reduce the initial buffer size so that
it does.


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Comment By: Roger Upole (rupole)
Date: 2010-06-03 20:49

Message:
I can't reproduce this on XP, Vista, or Windows 7.  Which OS are you on ?

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