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

Glyph Lefkowitz glyph at twistedmatrix.com
Wed Jun 8 23:50:22 PDT 2011


I assure you I'm using Python's bind correctly - this isn't my first rodeo :-).

self.port resolves to the path name, in that code.  The test program I wrote worked on my system as I expected it to.

Regarding the documentation you're referring to: the documentation on that page says "The format of address depends on the address family — see above".  Scanning back up the page, it says "Socket addresses are represented as follows: A single string is used for the AF_UNIX address family.".  The type of socket here is indeed an AF_UNIX socket, and the address is its path name.

Anyway, this is starting to get pretty far off topic for calendar server: basically, in this case, there's something wrong with the underlying platform; either Python or the kernel or some library that a build of Python depends on.  For some reason, one of these components can't open a UNIX socket.  Once that's addressed (whatever the problem is) the server should work fine.

On Jun 8, 2011, at 11:05 PM, Scott Cherf wrote:

> John -
> 
> Thanks, I was thinking the same thing myself and was reading that page when I received your mail.
> 
> Glyph had a simple test to see if my installation of python was working correctly. The actual line that's reporting the error is in the file unix.py, which shows up in the Twisted/twisted/internet/unix.py file at line 89 and reads:
> 
>               skt.bind(self.port)
> 
> I'm not sure what self.port resolves to.
> 
> Regards,
> 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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