Re^3: extract last 1 min log and find a string

You need to put the file ReadBackwards.pm in D:/App/Perl/site/lib/File. Create a sub folder File if necessary

How big is the log file ? Gigabytes ?

poj

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Re^4: extract last 1 min log and find a string by ytjPerl (Scribe) on Jul 20, 2017 at 18:04 UTC
Thanks! it is working. I have my codes as following: `use File::ReadBackwards; use POSIX; my $success; my $items; my $earliest = strftime( "%Y-%m-%d %H:%M:%S", localtime( time()- 1 * 6 +0 ) ); $bw = File::ReadBackwards->new( '/Documents/Traning/Perl/output.txt' ) + or die "/Documents/Traning/Perl/output.txt $!" ; while ( defined( my $log_line = $bw->readline() ) ) { last if $log_line lt $earliest; if ($log_line =~ /EnableDelayedExpansion/i) { print $log_line; }else { print "error";} }` [download] My intention is to search the string in the logfile which is still loading every min, once I found string, print out this line.	[reply] [d/l]

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Re^4: extract last 1 min log and find a string
by ytjPerl (Scribe) on Jul 20, 2017 at 18:04 UTC

use File::ReadBackwards;
use POSIX;

my $success;
my $items;
my $earliest = strftime( "%Y-%m-%d %H:%M:%S", localtime( time()- 1 * 6
+0 ) );

$bw = File::ReadBackwards->new( '/Documents/Traning/Perl/output.txt' )
+ or
                        die "/Documents/Traning/Perl/output.txt $!" ;

while ( defined( my $log_line = $bw->readline() ) ) {


    last if $log_line lt $earliest;

    if ($log_line =~ /EnableDelayedExpansion/i) {
        print $log_line;
    }else
    { print "error";}

}
[download]

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