From: "Iñaki Baz Castillo" <ibc@...>
Date: 2008-09-25T07:33:53+09:00
Subject: How to read a PIPE in unbuffered way?

Hi, I'd like to know the Ruby equivalent to the following Perl code:

---------------------
open(PIPE,"ngrep dst port 80 |");
select(PIPE); $| = 1;   # make unbuffered
select(STDOUT); $| = 1; # make unbuffered

while(<PIPE>)
{       
        chomp($_);
        s/
//ig;
        s/  // if(/^ /);
	#### process and change the captured data before writting to the screen ####
}
close(PIPE);
-------------------------

"ngrep" itself is a Linux command that captures TCP/UDP data and prints it to 
the screen. In this case I capture traffic with destination port 80.

I assume I must start with:

  f = IO.popen("ngrep dst port 80")

but no idea of what to do after that. Any help please? Thanks a lot.



-- 
Iñaki Baz Castillo