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Hi

I might have found the reason for those LibClamAV errors which (almost) nobody 
else seems to have.
Today I ran aptitude which also updated all clamav packages. During 
installation I opted for the standard package configuration - as I didn't make 
any configuration changes.

Soon after that I got another LibClamAV "courierfilter: LibClamAV Error: 
cl_free: engine == NULL" error.
While trying to find the problem I also tested the pythonfilter clamav.py 
program i.e. the included python modules.

- - ---
python
Python 2.5.2 (r252:60911, Jan 24 2010, 14:53:14) 
[GCC 4.3.2] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import sys
>>> import pyclamav
>>> help(pyclamav)

>>> pyclamav.version()
'0.4.1'
>>> pyclamav.get_version()
LibClamAV Error: cl_cvdhead: Can't open file /var/lib/clamav//daily.cvd
('0.96.3', 0, 0)
>>> 

- - ---

Where I had a /var/lib/clamav/daily.cvd file before there was now a 
/var/lib/clamav/daily.cld file.
It seems that 'daily.cvd' is the compressed version of 'daily.cld'.

The clamav-freshclam package's standard configuration contains 
'CompressLocalDatabase no'.
So, the first database upgrade after the program upgrade downloaded the 
daily.cld file.

Unfortunately pyclamav doesn't seem to understand the uncompressed format. As a 
result Courier will block all messages to be sent.

Would it be possible to include a test for the correct clamav database 
versionand throw up an error if 'daily.cvd' doesn't exist? This would be very 
helpful and remove a potential mail disruption.

Cheers,
Bernd
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