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Full Discussion: Logfile monitoring with logfile replacement
Top Forums Shell Programming and Scripting Logfile monitoring with logfile replacement Post 302925247 by Aia on Saturday 15th of November 2014 12:42:02 AM
Old 11-15-2014
@Warluck

If you don't see any one posting comments on you thread is a pretty good indication that the inquire is not clear. You might need to give more information or formulate you query differently.

As it happens, I am not quite sure what you mean.
Code:
tail -fn0 $logfile | \
while read line ; do
... some stuff
done

$logfile will keep logging until you stop the mechanism that records the log entries, and this is independent of displaying its content with tail and piping it to a while read loop. It is also independent of that loop.

Thus, this statement of yours is not clear:
Quote:
I would like to end the script right away and not wait a new line to be added to the monitored logfile.
Even if the script stops the mechanism that logs will keep going.

Now, if you want to stop the script right when it encounters a given string, you must read it first, identify it as a show stopper, and exist the script. Therefore, it must be done, before any of the other do ...some stuff.

But, please, expand further, since I'm quite sure this will not satisfy your query.
Last edited by Aia; 11-15-2014 at 02:12 AM.. Reason: Grammar correction
 

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LEARN ABOUT DEBIAN

arno-fwfilter

ARNO_FWFILTER(1)														  ARNO_FWFILTER(1)

NAME

       arno-fwfilter - a filter script to make iptables firewall logs more readable for humans

SYNOPSIS

       arno-fwfilter [OPTIONS]

DESCRIPTION

       arno-fwfilter is a pipe filter script to make the firewall-log better readable. Some usage examples are:

       Static firewall log filtering:
	      arno-fwfilter < logfile

       Realtime firewall logging on tty10:
	      tail --follow <logfile> | arno-fwfilter >/dev/tty10 &

OPTIONS

       --help, -h
	      Print the available options.

       --html-output, -o
	      Use basic HTML to format the output

       --no-locations, -l
	      Disable to (try to) obtain the IP's geographical location. By default, http://www.hostip.info/ is visited to get this information.

       --no-colors, -c
	      Disable the use of colors in the output.

       --single-line, -s
	      Put all information about an event in a single line

SEE ALSO

       iptables(8), arno-iptables-firewall(8)

       The http://rocky.eld.leidenuniv.nl/ web site.

AUTHOR

       arno-fwfilter was written by Arno van Amersfoort <arnova@rocky.eld.leidenuniv.nl>.

       This manual page was written by Michael Hanke <michael.hanke@gmail.com>, for the Debian project (but may be used by others).

Michael Hanke							  September 2005						  ARNO_FWFILTER(1)
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