See the tail option

When first started, read and return n lines from the file. 
If n is zero, start at the end of file. If n is negative, 
return the whole file. Default is 0.
my $fh = File::Tail->new(
  name        => $Config->{'_'}{'DIAGFILE'},
  interval    => 1,  # wait at start
  maxinterval => 10, # change to suit
  adjustafter => 10,  # change to suit
  tail        => -1, # all lines read at start up
);

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poj

In reply to Re^11: trying to implement file tail with regular expression by poj
in thread trying to implement file tail with regular expression by mkhayat

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