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FAQ Database : Nagios : Developer Information

Title:How can I convert the timestamp values in the log file to a friendlier format?
FAQ ID:F0070
Submitted By:Andreas Wassatsch, Martin Ryan and Steve Alston 
Last Updated:10/12/2003

Description:

User would like to view the raw log files with human-readable timestamps.

 

Solution:

The following Perl script will print out the contents of a Nagios log file with a human-readable time format: 


#!/usr/bin/perl
# nagios-log-print
# taken from the faqs section FAQID: F0070 on the www.nagios.org website
#

if (!@ARGV[0]) {
    print "Usage: {jumi [knowledge-based/faq/viewfaq.php]} <logfile name>\n";
    print "\n";
    print "prints the specified Nagios-logfile with timestamps\n";
    print "converted to human readable time\n";
    exit 1;
}

open(LOG,@ARGV[0]) || die "no Nagios log file named >>>>>>@ARGV[0]<<<<<<";
while (<LOG>) {
    ($part1, $part2) = split(/\s+/, $_, 2);
    $part1 =~ s/\[//;
    $part1 =~ s/\]//;
    print "[", scalar localtime($part1), "]\;$part2\n";
};
close(LOG);

Alternatively, if you want to display the log from the command line use; 

perl -pe 's/(\d+)/localtime(jumi)/e' nagios.log

 

Related FAQs:
F0068What timestamp format is used in data and log files?
Keywords:log timestamp format 
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