[ns] Awk (file or code) in ns TCL scripts

[Tariq Alsaifi]

Hello every one!

I did check the archive before I wrote this, and the only related I found was 
this:

http://mailman.isi.edu/pipermail/ns-users/2006-May/055626.html

However I did try it and didn’t work, so let me ask the question again:

What is the correct code to include awk (file or code) within ns TCL script so 
the awk file can be executed without having trace file, so no consuming disk 
space (no big trace files, just the results we want to see using awk) AND at 
the same time it gives the same results as if we have the whole trace file and 
we filter it by the awk file

In other words, I don’t need trace file, since my scenario produce a huge 
trace file (in G’s) and I just want the results from awk file, which can be 
run at the same time as the simulation

The previous suggestion was:

set tr [open "| awk -f filter.awk >out.tr" w]
$ns trace-all $tr


Which I tried and didn’t work properly

Any suggestion?

Regards
Tariq