dokan unmount failed on windows7

OS: windows7 x64
Python: 2.7(32bit)
Pyfilesystem: 0.5.5a1
Dokan: 1.0.3 x64

>>> from fs.expose import dokan
>>> from fs.memoryfs import MemoryFS
>>> memfs = MemoryFS()
>>> dokan.mount(memfs, 'Q:\\')
<fs.expose.dokan.MountProcess object at 0x02784350>
>>> dokan.unmount('Q:\\')
Traceback (most recent call last):
  File "<string>", line 3, in <module>
  File "C:\Python27\lib\site-packages\fs\expose\dokan\__init__.py", line 1107, in _do_mount
    mount(fs, path, **opts)
  File "C:\Python27\lib\site-packages\fs\expose\dokan\__init__.py", line 1009, in mount
    res = libdokan.DokanMain(ctypes.byref(opts), ctypes.byref(opstruct))
WindowsError: exception: access violation reading 0x0000004A
>>>

Anything wrong?

@Liryna

@Liryna Do you have a clue?

@Pagliacii

@Pagliacii @Rondom need to see if the correct dokan1.dll x86 is used since python 32bit is used here.
I used the same code and never faced this 😢
otherwise would need more log to see what is happening.

The dokan x86 could not be installed on x64 PC.
When I use dokan.unmount in python 64 bit, it worked correctly.

@Pagliacii

@Pagliacii Good to know it worked !
In case of, the x86 dokan1.dll is in the x64 package under the folder C:\Program Files\Dokan\ x86

@Liryna

@Liryna Okay, I will try it next Monday! Thanks for your help!

But then things should either work when it finds the DLL or not work when it does not find the DLL. If it crashes, it is a bug, isn't it?

DLL has to be a side to side to the python project.

If it does not find it, there is an error at the start.
If a dll is found x86 / x64, it will run. But if a different arch (python / dll) is used, you will get a crash at a moment.

I do not know if there is a way for python to tell if the dll is x86 or x64 before to load it.

@Liryna

@Liryna
How could I tell the python 32bit to find the x86 dokan1.dll? By the environment variable DokanLibrary1?

In my computer, I try to set the DokanLibrary1 as 'C:\Program Files\Dokan\x86', but it raised the windows error again.

And it could work correctly in python 64 bit.

>>> os.environ['DokanLibrary1']
'C:\\Program Files\\Dokan\\x86'

@Liryna

@Liryna
The access violation reading error happened when I try to unmount the virtual disk on python 32 bit with the x86 dokan1.dll in win7 x86.

I don't have another x86 pc to test the unmount, so I not sure that something wrong in x86 dokan1.dll.

😢 would be interesting to know what is happening.

I'm not familiar with the ctypes module, so I don't have any idea.

Navigation Menu

Repository navigation

dokan unmount failed on windows7 #274

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

dokan unmount failed on windows7 #274

Description

Activity

Rondom commented on Sep 15, 2017

Liryna commented on Sep 15, 2017

Pagliacii commented on Sep 15, 2017

Liryna commented on Sep 15, 2017

Pagliacii commented on Sep 16, 2017

Rondom commented on Sep 16, 2017

Liryna commented on Sep 16, 2017

Pagliacii commented on Sep 18, 2017

Pagliacii commented on Sep 22, 2017

Liryna commented on Sep 22, 2017

Pagliacii commented on Sep 22, 2017

Metadata

Metadata

Assignees

Labels

Type

Projects

Milestone

Relationships

Development

Issue actions