Removing tcpdump buffering when piping output

[paulobrads]

I'm piping the output of tcpdump to an awk command. Something like this:

tcpdump -i eth0 | awk'{print $1}'

Tcpdump seems to buffer output until quite a bit of data is received which is then all dumped to output in one load. Can this be removed to allow real time processing and printing of stuff piped out?

Cheers.

 

[PHV]

tcpdump -i eth0 [!]-l[/!] | awk'{print $1}'

Hope This Helps, PH.
FAQ219-2884
FAQ181-2886

 

[paulobrads]

Yeah, thanks for that but already tried that but doesn't seem to make any difference.

Any other ideas?

 

[paulobrads]

Actually - that does work if I also fflush the input to the awk.

Cheers.