Re: [bug-gawk] /inet/tcp receive TCP packet bug

[Andrew J. Schorr]

Hi,

Please CC bug-gawk in the future.

On Tue, Dec 29, 2015 at 09:58:56PM +0300, Владимир Губарев wrote:
>  Yes, it is correct. 
> 1. I saw gawkextlib, it can be helpful for my situation?

When used with the gawk master branch, gawkextlib's select library gives you 
the tools for non-blocking I/O multiplexing. This should work well with textual 
data, if you are willing to use non-released code.

> 2. Well, i dont think you should add binary ops into lib. It would be 
> interesting awesome feature, but first of all, gawk is text- editor and it is 
> too specific task. I dont think somebody else needs that. It's just my 
> training project in my University, which is the realization that everything 
> is possible to do. 

I think it's possible, but would probably require some additional library 
functions to support reading binary data. The XDR messages probably have a 
record-length field followed by binary data. So you need to do something like 
read the first 2 bytes to get the packet length, and then read the remainder of 
the record. Unless I'm missing something, that will require access to the read 
system call.

Regards,
Andy