Re: FCGI_LISTENSOCK_FILENO

Tom,

If the webserver forks the application, it leaves FD0, and STDERR, 
STDIN, and STDOUT are mutiplexed over it using the FastCGI protocol.

If it's a socket connect, it's basically the same thing - you'll to an 
accept(), and when you get the FD, use the libraries to send/receive 
data on the socked.

David.

------------------------------------------------------------------------

Thomas Grimshaw wrote:
> Since the list is working again now :)
>
> ===========
>
>
> Hi all,
>
> I'm currently in the process of expanding my webserver to support 
> FastCGI. However, i'm having a little trouble understanding one 
> crucial part of the specification.
>
> I may be lacking some fundamental knowledge here, so, please bear with 
> me!
>
> I need to create a socket in my webserver application before launching 
> the fastCGI app. So, I do this, and I have the socket handle.
>
> The specification reads "The Web server leaves a single file 
> descriptor, FCGI_LISTENSOCK_FILENO, open when the application begins 
> execution. This descriptor refers to a listening socket created by the 
> Web server."
> How does the FastCGI application get my socket handle?  I see from the 
> spec that FCGI_LISTENSOCK_FILENO is a constant of 0.  And a file 
> descriptor of 0 refers to STDIN, does it not? Is this a roundabout way 
> of saying that I need to use STDIN to communicate?
>
> I'd appreciate any help you guys can give.
>
> Many thanks,
>
> Tom
>
>
>
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