#!/usr/bin/perl -w 

use strict;
use 5.6.1;

sub find {
    local *FH = shift;
    my $find_me = shift;
    my $count   = 0;

    my $tell = tell(FH);
    while (<FH>) {
        $count++ if (/$find_me/);
    }

    return "count: $count tell: $tell\n";
}

open OUT, '>', '/tmp/tmp.txt' or die "$!\n";
print OUT while (<DATA>);
close OUT or die "$!\n";

open IN, '/tmp/tmp.txt' or die "$!\n";

print find( *IN, 'a' );
print find( *IN, 'a' );
print find( *IN, 'd' );
print find( *IN, 'e' );

#count: 3 tell: 0
#count: 0 tell: 13
#count: 0 tell: 13
#count: 0 tell: 13


__DATA__
a
a
a
c
d 
e