Re: [Chicken-users] How to convert an UDP socket to file descriptor

[Alexsandro Soares]

Hi Peter,

  I changed the line
         (fd (port->fileno (udp-bound-port s)))
  to
         (fd (port->fileno port))

  But now, the error is

     Error: (port->fileno) argument is not a port: 6000

Any help?

Alex

2010/4/29 Peter Bex <address@hidden>:
> On Thu, Apr 29, 2010 at 12:20:18AM -0300, Alexsandro Soares wrote:
>> Hello,
>>
>>     I'm new in Chicken and I'm trying to write a small UDP client
>> using file-select. But i get the following error:
>>
>>            Error: (port->fileno) argument is not a port: 45691
>
> I think you confused Scheme's concept of ports with the OS concept of
> ports on network interfaces.  udp-bound-port doesn't return a Scheme
> port!  Instead, it returns the network port number it's bound to.
>
> I think you can just change it to (port->fileno port), where port
> is the cadr of SP.
>
> Cheers,
> Peter
> --
> http://sjamaan.ath.cx
> --
> "The process of preparing programs for a digital computer
>  is especially attractive, not only because it can be economically
>  and scientifically rewarding, but also because it can be an aesthetic
>  experience much like composing poetry or music."
>                                                        -- Donald Knuth
>