#!/usr/bin/perl

use FileHandle;
use Fcntl ':flock';

#   Create file handle and open file for writing
#
my $fh = new FileHandle;
if ($fh->open(">file")) {

    #   Obtain an exclusive lock on the file handle
    #
    flock ($fh, LOCK_EX);

    #   Write to file handle
    #
    print $fh "Just another Perl hacker\n";

    #   Remove exclusive lock on file handle and close file handle
    #
    flock ($fh, LOCK_UN);
    $fh->close;
}

exit 0;