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Full Discussion: parse a log file and remember last line
Top Forums Shell Programming and Scripting parse a log file and remember last line Post 302448640 by bartus11 on Thursday 26th of August 2010 01:31:48 PM
Old 08-26-2010
You can try something like that:
Code:
#!/bin/ksh
while :; do
temp=$(tail -1 /your/log/file)
awk "/$last/{p=1}p" /your/log/file #pipe output of that command to your parser
last=$temp
sleep 300
done

To test if it is working correctly, you can do something like:
Code:
#!/bin/ksh
while :; do
temp=$(tail -1 /your/log/file)
echo "============================================="
awk "/$last/{p=1}p" /your/log/file
last=$temp
sleep 300
done

Then new entries should be printed continously every 5 mins, separated from the old ones by "======".
 

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LEARN ABOUT DEBIAN

fstrace_clear

FSTRACE_CLEAR(8)					       AFS Command Reference						  FSTRACE_CLEAR(8)

NAME

       fstrace_clear - Clears the trace log

SYNOPSIS

       fstrace clear [-set <set name>+]
	   [-log <log name>+]
	   [-help]

       fstrace c [-s <set name>+]
	   [-l <log name>+] [-h]

DESCRIPTION

       The fstrace clear command erases the contents of the trace log from kernel memory, but leaves kernel memory allocated for the log.

OPTIONS

       -set <set name>+
	   Names the event set for which to clear the associated trace log.  The only acceptable value is "cm" (for which the associated trace log
	   is "cmfx"). Provide either this argument or the -log argument, or omit both to clear the "cmfx" log by default.

       -log <log name>+
	   Names the trace log to clear. The only acceptable value is "cmfx". Provide either this argument or the -set argument, or omit both to
	   clear the "cmfx" log by default.

       -help
	   Prints the online help for this command. All other valid options are ignored.

EXAMPLES

       The following command clears the "cmfx" trace log on the local machine:

	  # fstrace clear

PRIVILEGE REQUIRED

       The issuer must be logged in as the local superuser "root".

SEE ALSO

       fstrace(8), fstrace_lslog(8), fstrace_lsset(8)

COPYRIGHT

       IBM Corporation 2000. <http://www.ibm.com/> All Rights Reserved.

       This documentation is covered by the IBM Public License Version 1.0.  It was converted from HTML to POD by software written by Chas
       Williams and Russ Allbery, based on work by Alf Wachsmann and Elizabeth Cassell.

OpenAFS 							    2012-03-26							  FSTRACE_CLEAR(8)
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