[Haskell-cafe] Network.Socket error in MacOS 10.5?

[kenny lu]

Thanks for the pointers. I will take a look.

Kenny

On Thu, Aug 27, 2009 at 2:20 AM, Ross Mellgren <rmm-haskell at z.odi.ac> wrote:

> I don't think getNameInfo should work for for AF_UNIX -- the name given to
> SockAddrUnix is a file path, there is no name resolution. From the man page
> for getnameinfo(3) on OS X:
>
> NAME
>   getnameinfo -- socket address structure to hostname and service name
>
> ...
>
> DESCRIPTION
>
> ...
>
>   The sockaddr structure sa should point to either a sockaddr_in or
> sockaddr_in6 structure
> (for IPv4 or IPv6 respectively) that is salen bytes long.
>
>
>
> Similarly, from the man page for getnameinfo on my linux box:
>
> ...
>
> The sa argument is a pointer to a generic socket address structure (of type
> sockaddr_in or sockaddr_in6) of size salen that holds the input IP address
> and port number.
>
> -Ross
> On Aug 26, 2009, at 2:07 PM, Johan Tibell wrote:
>
>  On Wed, Aug 26, 2009 at 6:33 PM, kenny lu<haskellmail at gmail.com> wrote:
>>
>>> Hi,
>>>
>>> I encountered a problem with Network.Socket in MacOS 10.5
>>> Here is the code that I am testing,
>>>
>>> -----------------------------------------
>>> -----------------------------------------
>>> module Main where
>>>
>>> import qualified Network.Socket as Socket
>>>
>>> main :: IO ()
>>> main =
>>>    do { (hostname, _) <- Socket.getNameInfo [] True False
>>> (Socket.SockAddrUnix "localhost")
>>>       -- (hostname, _) <- Socket.getNameInfo [] True False
>>> (Socket.SockAddrInet 9000  (127 + 0 * 256 + 0 * 256^2 + 1 * 256^3))
>>>       ; putStrLn (show hostname)
>>>       }
>>>
>>>
>>> Running the above code yields the following error
>>> ghc --make -O2 TestSocket.hs
>>> [1 of 1] Compiling Main             ( TestSocket.hs, TestSocket.o )
>>> Linking TestSocket ...
>>> $ ./TestSocket
>>> TestSocket: getNameInfo: does not exist (ai_family not supported)
>>>
>>> If I switch to SockAddrInet instead, the error is gone.
>>>
>>> I am using GHC 6.10.3 and Network 2.2.1
>>>
>>
>> Is SockAddrUnix supposed to work on Mac OS X? Could you test it by
>> e.g. writing a small C program that uses it?
>>
>> -- Johan
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>
>
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