Re^3: Watch log for string (tail -f)

tail -f doesn't end until you interrupt it. Try something like this:

#! perl -slw
use strict;

my $pid = open TAIL, '-|', 'tail -f theLog' or die $!;
my @matches;
while( @matched <3 and defined( $_ = <TAIL> ) ) {
      push @matches, $_ if /the search term/;
}

kill 2, $pid;

## do something with the 3 lines in @matches.
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Re^4: Watch log for string (tail -f) by bimleshsharma (Beadle) on Oct 12, 2012 at 07:39 UTC
Try this, May this will help `use File::Tail; sub reading_updated_file { my $path=shift; my $count=0; my $file=File::Tail->new($path); while(defined (my $read=$file->read)) { if($read =~ /string_to_match/) { $count++; last if $count ==3; } print "here doing rest statements"; } } &reading_updated_file("path of file_to tail");` [download]	[reply] [d/l]
Re^4: Watch log for string (tail -f) by Skootaman (Novice) on Sep 30, 2013 at 11:44 UTC
This just really helped me. Note that @matches is declared but is interchangeably used as @matched, apart from that, this is really useful - thanks :)	[reply]