09-21-2010
Help with filtering trace file through grep
Hi,
I am using NS2 and i need to filter a trace file (part of which is shown below):
- 33.91576 2 3 tcp 1040 ------- 1 0.0 4.0 1115 2258
r 33.918907 4 3 ack 40 ------- 1 4.0 0.0 1107 2272
+ 33.918907 3 2 ack 40 ------- 1 4.0 0.0 1107 2272
- 33.918907 3 2 ack 40 ------- 1 4.0 0.0 1107 2272
r 33.9192 2 0 ack 40 ------- 1 4.0 0.0 1103 2264
+ 33.9192 0 2 tcp 1040 ------- 1 0.0 4.0 1123 2275
- 33.9192 0 2 tcp 1040 ------- 1 0.0 4.0 1123 2275
r 33.93256 2 3 tcp 1040 ------- 1 0.0 4.0 1111 2250
+ 33.93256 3 4 tcp 1040 ------- 1 0.0 4.0 1111 2250
- 33.93256 3 4 tcp 1040 ------- 1 0.0 4.0 1111 225
........................
The file needs to be filtered such that column number 3 should only contain "3" and column number 1 should only contain "r" using GREP (or awk).
Any help is greatly appreciated!
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tcp-env(1) General Commands Manual tcp-env(1)
NAME
tcp-env - set up TCP-related environment variables
SYNOPSIS
tcp-env [ -rR ] [ -ttimeout ] program [ arg ... ]
DESCRIPTION
The input for tcp-env must be a TCP connection. tcp-env finds out information about that connection, puts the information into several
environment variables as described in tcp-environ(5), and runs program with the given arguments.
Usually tcp-env is run from inetd. It might instead be run from another server that already sets up the right environment variables; if
PROTO is set to TCP when tcp-env is invoked, tcp-env assumes that all the other variables are set up properly, and it does not check
whether the input is a TCP connection.
OPTIONS
-r (Default.) Attempt to obtain TCPREMOTEINFO from the remote host.
-R Do not attempt to obtain TCPREMOTEINFO from the remote host.
-ttimeout
Give up on the TCPREMOTEINFO connection attempt after timeout seconds. Default: 30.
SEE ALSO
tcp-environ(5), inetd(8)
tcp-env(1)