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Full Discussion: How to print line if two lines above it matches patterns.?
Top Forums Shell Programming and Scripting How to print line if two lines above it matches patterns.? Post 302958415 by Juha on Thursday 22nd of October 2015 02:03:25 AM
Old 10-22-2015
How to print line if two lines above it matches patterns.?
Hi,

I could only find examples to print line before/after a match, but I'd need to print line after two separate lines matching.

E.g.: From the below log entry, I would need to print out the 1234. This is from a huge log file, that has a lot of entries with "CLIENT" and "No" entries (+ other messages), and I need to print the client number only if the "CLIENT" and "No" tags are in consecutive lines as in the below example.

Would anyone have idea how to do this (awk/sed/?)

Code:
....
[12:16:30.901]  <CLIENT>
[12:16:30.901]          <No>
[12:16:30.901]          1234
[12:16:30.901]          </No>
[12:16:30.901]  </CLIENT>
....

 

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LEARN ABOUT OPENSOLARIS

log2pcap

LOG2PCAP(1)							   User Commands						       LOG2PCAP(1)

NAME

       log2pcap - Extract network traces from Samba log files

SYNOPSIS

       log2pcap [-h] [-q] [logfile] [pcap_file]

DESCRIPTION

       This tool is part of the samba(7) suite.

       log2pcap reads in a samba log file and generates a pcap file (readable by most sniffers, such as ethereal or tcpdump) based on the packet
       dumps in the log file.

       The log file must have a log level of at least 5 to get the SMB header/parameters right, 10 to get the first 512 data bytes of the packet
       and 50 to get the whole packet.

OPTIONS

       -h
	   If this parameter is specified the output file will be a hex dump, in a format that is readable by the text2pcap utility.

       -q
	   Be quiet. No warning messages about missing or incomplete data will be given.

       logfile
	   Samba log file. log2pcap will try to read the log from stdin if the log file is not specified.

       pcap_file
	   Name of the output file to write the pcap (or hexdump) data to. If this argument is not specified, output data will be written to
	   stdout.

       -h|--help
	   Print a summary of command line options.

EXAMPLES

       Extract all network traffic from all samba log files:

			  $ log2pcap < /var/log/* > trace.pcap

       Convert to pcap using text2pcap:

		$ log2pcap -h samba.log | text2pcap -T 139,139 - trace.pcap

VERSION

       This man page is correct for version 3.0 of the Samba suite.

BUGS

       Only SMB data is extracted from the samba logs, no LDAP, NetBIOS lookup or other data.

       The generated TCP and IP headers don't contain a valid checksum.

SEE ALSO

       text2pcap(1), ethereal(1)

AUTHOR

       The original Samba software and related utilities were created by Andrew Tridgell. Samba is now developed by the Samba Team as an Open
       Source project similar to the way the Linux kernel is developed.

       This manpage was written by Jelmer Vernooij.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +--------------------+----------------------+
       |  ATTRIBUTE TYPE    |	ATTRIBUTE VALUE    |
       +--------------------+----------------------+
       |Availability	    | SUNWsmbar, SUNWsmbau |
       +--------------------+----------------------+
       |Interface Stability | External		   |
       +--------------------+----------------------+
NOTES

       Source for Samba is available on http://opensolaris.org.

       Samba(7) delivers the set of four SMF(5) services as can be seen from the following example:

	    $ svcs samba wins winbind swat
	   STATE	  STIME    FMRI
	   disabled	  Apr_21   svc:/network/samba:default
	   disabled	  Apr_21   svc:/network/winbind:default
	   disabled	  Apr_21   svc:/network/wins:default
	   disabled	  Apr_21   svc:/network/swat:default

       where the services are:

	"samba"
	   runs the smbd daemon managing the CIFS sessions

	"wins"
	   runs the nmbd daemon enabling the browsing (WINS)

	"winbind"
	   runs the winbindd daemon making the domain idmap

	"swat"
	   Samba Web Administration Tool is a service providing access to browser-based Samba administration interface and on-line documentation.
	   The service runs on software loopback network interface on port 901/tcp, i.e. opening "http://localhost:901/" in browser will access
	   the SWAT service on local machine.

       Please note: SWAT uses HTTP Basic Authentication scheme where user name and passwords are sent over the network in clear text. In the SWAT
       case the user name is root. Transferring such sensitive data is advisable only on the software loopback network interface or over secure
       networks.

Samba 3.0							    01/19/2009							       LOG2PCAP(1)
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