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Top Forums Shell Programming and Scripting List all log records logged after $timestamp ? Post 302325735 by Browser_ice on Tuesday 16th of June 2009 04:02:51 AM
Old 06-16-2009
Question List all log records logged after $timestamp ?

I am trying to find a way to list every records inside a file (usually a log file) that are present after a record mathing/greater-then a timestamp supplied by another script.

The timestamp can be anywhere inside the record and it is usually in the standard `date` format (will not look for other formats).

ex:
Tue Jun 16 03:47:58 EDT 2009

I thought of using awk (on client's AIX 4.2) with index(str,regex) but that function does not see any timestamps inside the records (copied code below from memory).

awk -F" " '{
WHICHPOS=index($0,"[A-Z][a-z][a-z] [A-Z][a-z][a-z] [0-3][0-9] [0-2][0-9]:[0-5][0-9]:[0-5][0-9] * 20[0-9][0-9]")

if ( WHICHPOS > 0) print WHICHPOS, NR, $0
}' /tmp/a_file



At first the * was producting verry odd results (was replaced by content of `ls *`). So I removed the " * 20[0-9][0-9]" part.

But then, it never sees any timestamp (I checked the file content).

I am beginning to wonder what kind of regular expression that index() can take.

Is there a timestamp pattern available in regular expressions ?
 

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Courier::Filter::Logger::File(3pm)			User Contributed Perl Documentation			Courier::Filter::Logger::File(3pm)

NAME
Courier::Filter::Logger::File - File logger for the Courier::Filter framework SYNOPSIS
use Courier::Filter::Logger::File; my $logger = Courier::Filter::Logger::File->new( file_name => $file_name ); # For use in an individual filter module: my $module = Courier::Filter::Module::My->new( ... logger => $logger, ... ); # For use as a global Courier::Filter logger object: my $filter = Courier::Filter->new( ... logger => $logger, ... ); DESCRIPTION
This class is a file logger class for use with Courier::Filter and its filter modules. It is derived from Courier::Filter::Logger::IOHandle. Constructor The following constructor is provided: new(%options): returns Courier::Filter::Logger::File; throws Courier::Error Creates a new logger that logs messages as lines to a file. Opens the file for writing, creating it if necessary. %options is a list of key/value pairs representing any of the following options: file_name Required. The name of the file to which log messages should be written. timestamp A boolean value controlling whether every log message line should be prefixed with a timestamp (in local time, in ISO format). Defaults to false. Instance methods The following instance methods are provided, as inherited from Courier::Filter::Logger::IOHandle: log_error($text): throws Perl exceptions Logs the error message given as $text (a string which may contain newlines). Prefixes each line with a timestamp if the "timestamp" option has been set through the constructor. log_rejected_message($message, $reason): throws Perl exceptions Logs the Courier::Message given as $message as having been rejected due to $reason (a string which may contain newlines). SEE ALSO
Courier::Filter::Logger::IOHandle, Courier::Filter::Logger, Courier::Filter::Overview. For AVAILABILITY, SUPPORT, and LICENSE information, see Courier::Filter::Overview. AUTHOR
Julian Mehnle <julian@mehnle.net> perl v5.14.2 2011-12-27 Courier::Filter::Logger::File(3pm)
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