Help on scripting using tail Post: 302073967

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Top Forums Shell Programming and Scripting Help on scripting using tail Post 302073967 by ranj@chn on Friday 19th of May 2006 02:02:50 AM

05-19-2006

Registered User

Try like this!! Not sure if it is efficient.

while read -p err_line
do
echo $err_line | grep "pattern" && echo "mailx scripts goes here"
done

For the change of timestamp in the logfile, you could check for the time in this loop and exit it after 00:00 and then start the loop again. See if this works for you.
You can catch the pid of the background job and kill it before you reassign the logfile name,But make sure you have lot of error check into the script. I did it below like this.
while true #the main loop
do
tail -f $logfile |&
while read -p line
do
job_id=$! #get the background job process id

echo $line | grep "pattern" && echo "mailx scripts go here"

if [[ `date +%H` -lt 1 -a `date +%M` -gt 5 ]]; then #check for your time
break; #break out from loop
fi done

kill $job_id #kill the id

sleep 5 # wait for sometime for the kill to complete its action.

logfile="$LOG/May_19.log" #reassign logfile
done

Last edited by ranj@chn; 05-19-2006 at 03:08 AM..

ranj@chn

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LEARN ABOUT DEBIAN

mtail

MTAIL(1)							   User Commands							  MTAIL(1)

NAME

       mtail - tail variant designed for web developers monitoring logfiles

SYNOPSIS

       mtail [options]	<file>...

DESCRIPTION

       MonkeyTail  allows  a  user to tail multiple files on both local and remote hosts and clearly marks inactivity by putting 5 newlines in the
       output whenever a pause in output over 3 seconds is detected.

       MonkeyTail is implemented a fairly simple wrapper script around standard tail, ssh, and sudo.

OPTIONS

       -q     Quiet mode

       --quiet
	      "    "

       -n     Output the last N lines of each file before tailing (defaults to 0)

       <file>...
	      Files to tail.

	      These can specified in the following ways:

       @<groupname>
	      - expands the group (from .mtailrc) to a list of

	      files to tail

       <filename>
	      - tails a local file.

       +<filename>		- attempts to sudo and tail a local file (will
	      prompt for pwd if required).

       <remotehost>:<filename>
	      - attempts to invoke tail via ssh on a remote

	      host.

       +<remotehost>:<filename> - attempts to invoke sudo tail via ssh on a
	      remote host (will prompt for pwd if required).

SEE ALSO

       mtailrc(5), tail(1)

AUTHOR

       Martyn Smith <martyn@dollyfish.net.nz>

mtail								     May 2008								  MTAIL(1)

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