Quote from: adulau on December 26, 2010, 10:00:38 AM

The IP addresses are collected with a simple script like this:

netstat -an | grep 8333 | grep ESTA | awk '{print $5}' | cut -f1,2,3,4 -d"." > /tmp/bitcoin (date | awk '{print "# " $0 " Bitcoin clients seen"}') >>/tmp/bitcoin

Oh this is cool. I confess I didn't know the commant netstat.

It could be cleaned a bit I think :
netstat -an | awk '/8333/ && /ESTA/ { print $5 }' | sed 's/:8333//' | tee >(echo "# $(date) $(wc -l) Bitcoin clients seen.")

It's funny : while I was starting bitcoin to test this, I couldn't get any connection even after a few minutes. It's just when I read a post about IRC bootstrapping that I have problems which bootstrapping. How ironic...

PS. You might consider adding a "Content-type" line in your script (assuming it's a CGI):

Code:

#!/bin/sh
echo "Content-type: text/plain"
echo
netstat -an |
awk '/8333/ && /ESTA/ { print $5 }' |
sed 's/:8333//' |
tee >(echo "# $(date) $(wc -l) Bitcoin clients seen.")

PS#2. I like this idea a lot. Especially since it's quite easy to install a mini http server such as thttpd for instance.
This makes me even dream of a full implementation of bitcoin via pure shell scripting. The http server could also publish his blocks, that could be requested by giving the hash of the block via a simple HTTP GET request.