[Haskell-cafe] hslogger and syslog-ng

[Brandon S. Allbery KF8NH]

On Aug 23, 2009, at 11:33 , Magnus Therning wrote:
> Brandon S. Allbery KF8NH wrote:
>> On Aug 23, 2009, at 09:41 , Magnus Therning wrote:
>>> I'm having some problem with logging to syslog using  
>>> System.Log.Logger
>>> and friends.  I have the following:
>>>
>>>> :m +System.Log.Logger
>>>> :m +System.Log.Handler.Syslog
>>>> sl <- openlog "foo" [PID] USER DEBUG
>>>> updateGlobalLogger rootLoggerName (addHandler sl)
>>>> warningM "bar" "test"
>>> *** Exception: sendTo: protocol error (Protocol wrong type for  
>>> socket)
>>>
>>> What could be the cause for this?
>>> I've tried hsyslog and it reports to my instance of syslog without  
>>> problems.
>> Looks like hslogger assumes /dev/log is always a datagram socket;  
>> hsyslog uses the system openlog(), which correctly recognizes that  
>> syslog-ng uses a stream socket.  (Think UDP and TCP, respectively,  
>> except that there's no IP involved with local sockets.)
>
> Oh, though logging to a dgram socket doesn't seem to work either.
>
> I added the following line to /etc/syslog-ng.conf:
>
>  unix-dgram("/dev/dlog");
>
> Restarted it and checked that the socket was there.  Then I ran the  
> following:
>
>  > :m +System.Log.Logger
>  > :m +System.Log.Handler.Syslog
>  > sl <- openlog_local "/dev/dlog" "foo" [PID] USER DEBUG
>  > updateGlobalLogger rootLoggerName (addHandler sl)
>  > warningM "bar" "test"
>  *** Exception: sendTo: protocol error (Protocol wrong type for  
> socket)


Hm.  hslogger uses a hardcoded 0 instead of PF_UNSPEC (not that  
Network.BSD exports PF_*, and it too hardcodes defaultProtocol as 0)  
but a spot check of system under my control suggests it should work  
most places.

-- 
brandon s. allbery [solaris,freebsd,perl,pugs,haskell] allbery at kf8nh.com
system administrator [openafs,heimdal,too many hats] allbery at ece.cmu.edu
electrical and computer engineering, carnegie mellon university    KF8NH


-------------- next part --------------
A non-text attachment was scrubbed...
Name: PGP.sig
Type: application/pgp-signature
Size: 195 bytes
Desc: This is a digitally signed message part
Url : http://www.haskell.org/pipermail/haskell-cafe/attachments/20090823/65378315/PGP.bin