++ with reservations. You don't check to see if your match succeeded, and just let the script run into an invalid redirect or possibly the first of your dies. Giving the user an error page instead would be better. Also, when you reopen the counter file for writing, you lose the lock. 
if(not defined $file) {
    print $some_error_page;
    exit;
}

sysopen FILE, "/path/to/logs/$file.txt", O_RDWR | O_CREAT
    or die "Can't open $file.txt: $!";
flock (FILE, LOCK_EX) or die("Can't lock $file.txt: $!");
my $count = <FILE> + 1;
seek FILE, 0, 0;
print FILE $count;
truncate FILE, tell FILE;
close FILE;

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Makeshifts last the longest.

In reply to Re^2: Count of downloads from web site. by Aristotle
in thread Count of downloads from web site. by Anonymous Monk

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