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Full Discussion: Relatively simple question regarding find and cmin
Top Forums UNIX for Dummies Questions & Answers Relatively simple question regarding find and cmin Post 302382720 by DeCoTwc on Thursday 24th of December 2009 02:58:58 PM
Old 12-24-2009
Relatively simple question regarding find and cmin
Nuts and bolts:

I have a log file that should be updated once every minute called OD_MEM.log. I want to add a check to my CheckSystem script that confirms that the log has been written to in the last 2 minutes. If I use the find command with cmin 1, it finds the file every time. If I use the find command with cmin 2 it does not find the file. Is the cmin option looking for files modified exactly n minute ago, or within the last n minute. Meaning if I use cmin 2, shouldn't it find files modified within the last 2 minutes, which would include the file I'm looking for (since it was modified 1 minute ago).

Code:
[root@mys-nycsm-srv01 logs]# date && ls -ltr /usr/local/mystro/logs/OD_MEM.log&&find /usr/local/mystro/logs/OD_MEM.log -cmin  1
Thu Dec 24 14:49:10 EST 2009
-rw-rw----  1 mystro mystro 11102934 Dec 24 14:48 /usr/local/mystro/logs/OD_MEM.log
/usr/local/mystro/logs/OD_MEM.log
[root@mys-nycsm-srv01 logs]# date && ls -ltr /usr/local/mystro/logs/OD_MEM.log&&find /usr/local/mystro/logs/OD_MEM.log -cmin  2
Thu Dec 24 14:50:07 EST 2009
-rw-rw----  1 mystro mystro 11103957 Dec 24 14:49 /usr/local/mystro/logs/OD_MEM.log
[root@mys-nycsm-srv01 logs]#

Now, just in case you'd like to laugh at how hard I worked on this before I realized I could just use find to check the modified time...

My original plan was to calculate how many lines there should be in the log based on the premise that for every hour there would be 60 lines and then in the latest hour add the number of minutes and compare it against the actual number of lines. It actually works, but I realize now it's an incredibly convoluted solution, so I'm hoping to better understand the find command and replace it.

Code:
OD_MEM_LINES=$(grep -c `date '+%Y-%m-%d'` /usr/local/mystro/logs/OD_MEM.log)
OD_HOUR=$(tail -2 /usr/local/mystro/logs/OD_MEM.log|awk '/2009/{print $2}'|cut -f1 -d:)
    if [[ $OD_HOUR -eq 00 ]];then
        OD_LINES_CAL=`tail -2 /usr/local/mystro/logs/OD_MEM.log|awk '/2009/{print $2}'|cut -f2 -d:`
    else
        OD_LINES_CAL=$(( ($OD_HOUR * 60 ) + `tail -2 /usr/local/mystro/logs/OD_MEM.log|awk '/2009/{print $2}'|cut -f2 -d:` ))
    fi
    if [[ $OD_MEM_LINES -lt $OD_LINES_CAL ]];then 
        printf "+-++-++-++-++-++-++-++-++-++-++-++-++-++-+\n"
        printf "There may be a problem with the On Demand Memory Manager.\n"
        printf "Was expecting there to be $OD_LINES_CAL lines in the OD_MEM.log, but only found $OD_MEM_LINES\n"
        printf "If there is a major difference between these two numbers, check the OD_MEM.log that a line has scrolled in the last 2 minutes\n" 
        printf "+-++-++-++-++-++-++-++-++-++-++-++-++-++-+\n"
    fi

 

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LEARN ABOUT DEBIAN

syslog2dlf

SYSLOG2DLF.IN(1)					  LogReport's Lire Documentation					  SYSLOG2DLF.IN(1)

NAME

       syslog2dlf - convert syslog log files to DLF

SYNOPSIS

       syslog2dlf

DESCRIPTION

       This script uses the Lire::Syslog module to create a DLF representation of the syslog log files. It can process all the syslog log formats
       supported by that module.

EXAMPLES

       To process a log as produced by syslog:

	$ syslog2dlf < syslog.log

       syslog2dlf will be rarely used on its own, but is more likely called by lr_log2report:

	$ lr_log2report syslog < /var/log/syslog.log

SEE ALSO

       Lire::Syslog(3pm)

VERSION

       $Id: syslog2dlf.in,v 1.6 2006/07/23 13:16:36 vanbaal Exp $

AUTHOR

       Francis J. Lacoste <flacoste@logreport.org>

COPYRIGHT

       Copyright (C) 2002 Stichting LogReport Foundation LogReport@LogReport.org

       This program is part of Lire.

       Lire is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free
       Software Foundation; either version 2 of the License, or (at your option) any later version.

       This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

       You should have received a copy of the GNU General Public License along with this program (see COPYING); if not, check with
       http://www.gnu.org/copyleft/gpl.html.

Lire 2.1.1							    2006-07-23							  SYSLOG2DLF.IN(1)
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