[CalendarServer-users] Couldn't listen onany:logs/caldavd.sock: [Errno 22] Invalid argument.

[Scott Cherf]

Hi Glyph -

No joy. I checked out CalendarServer 2.5 to /Volumes/Users/cherf/tmp and tried again with the following results:

[alphonse:~/tmp/CalendarServer-2.5] cherf% pwd
/Users/cherf/tmp/CalendarServer-2.5
[alphonse:~/tmp/CalendarServer-2.5] cherf% python
Python 2.6.6 (r266:84292, Jun  8 2011, 18:50:17) 
[GCC 4.2.1 (Apple Inc. build 5646)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> import socket
>>> skt = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
>>> skt.bind("some.socket")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "<string>", line 1, in bind
socket.error: [Errno 22] Invalid argument
>>> skt.bind ("/tmp/some.socket")
>>> skt.listen(5)
>>> 

The previous pathname length was 87 characters (plus 12 for "/some.socket" = 99) which doesn't seem too long for a POSIX name. 

I noticed the python manual made a distinction between relative and absolute pathnames in bind statements, which was why I thought that was the difference. but I'm just guessing.

I might get closer if it were possible to include something that would let me test the two statements:

  skt = self.createInternetSocket()
  skt.bind (self.port) 

in relative isolation but I couldn't find the createInternetSocket  method (in fact I don't know enough about python to guess what sort of object "self" is :). It still looks like some sort of python problem to me though. I noticed that unix.py makes a reference to twisted.test.test_unix. Is that test case available somewhere? Perhaps running it on my system would give me a better idea of what's happening. Failing that I'll need to spend some time learning the Python debugger.

Regards,
Scott.


On Jun 10, 2011, at 9:35 PM, Glyph Lefkowitz wrote:

> Hi Scott,
> 
> Relative paths work fine, too.  However, I think the length of the full absolute path may be an issue in some cases, even if you pass it as a short relative path.  If you try creating a relative-path socket in a shorter path, like your home directory, it should work.
> 
> Try putting your CalendarServer checkout somewhere with a very short path, like /dccs/ instead of ~/Projects/Blah/Blah/Blah/.  I'd be interested to know if that fixes it.  I actually remember fixing a bug in this area a while ago: it's probably fixed on the 3.x line but not 2.x.
> 
> Thanks and good luck,
> 
> -glyph
> 
> On Jun 10, 2011, at 6:03 PM, Scott Cherf wrote:
> 
>> Hello John -
>> 
>> Forgive my doubts, as you mention I had best read the manual.
>> 
>> You are correct, I was using python's bind incorrectly, the correct code fragment is shown below:
>> 
>> [alphonse:~] cherf% cd Projects/Source/MacOSForge/CalendarServer/tags/release/CalendarServer-2.5/
>> /Users/cherf/Projects/Source/MacOSForge/CalendarServer/tags/release/CalendarServer-2.5
>> [alphonse:tags/release/CalendarServer-2.5] cherf% python
>> Python 2.6.6 (r266:84292, Jun  8 2011, 18:50:17) 
>> [GCC 4.2.1 (Apple Inc. build 5646)] on darwin
>> Type "help", "copyright", "credits" or "license" for more information.
>>>>> import socket
>>>>> skt = socket.socket (socket.AF_UNIX, socket.SOCK_STREAM)
>>>>> skt.bind ("/tmp/some.socket")
>>>>> skt.listen(5)
>>>>> 
>> 
>> In fact, this works just fine on both my development machine and the server I'm trying to install the iCal server on, the difficulty was in the use of a relative pathname rather than an absolute name. Using a relative path on macOS apparently does not work, however changing the fragment to an absolute name works fine.
>> 
>> Unfortunately this leaves me wrestling with the original problem, which is to understand why I'm seeing the error from Twisted.
>> 
>> Again, thanks for the suggestion,
>> 
>> Scott.
>> 
>> On Jun 8, 2011, at 10:35 PM, Holland, John wrote:
>> 
>>> On 09.06.2011, at 07:25, "Scott Cherf" <cherf at ambient-light.com> wrote:
>>>> Using the fresh python 2.6 installed at /opt/local/bin/python I observed the following:
>>>> 
>>>> [alphonse:tags/release/Twisted] cherf% python
>>>> Python 2.6.6 (r266:84292, Jun  8 2011, 18:50:17)
>>>> [GCC 4.2.1 (Apple Inc. build 5646)] on darwin
>>>> Type "help", "copyright", "credits" or "license" for more information.
>>>>>>> import socket
>>>>>>> skt = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
>>>>>>> skt.bind("some.socket")
>>>> Traceback (most recent call last):
>>>> File "<stdin>", line 1, in <module>
>>>> File "<string>", line 1, in bind
>>>> socket.error: [Errno 22] Invalid argument
>>>>>>> 
>>> 
>>> I believe your using pythons bind incorrectly. Have a look at http://docs.python.org/release/2.6.6/library/socket.html
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