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NOTE: use Perl; is on undef hiatus. You can read content, but you can't post it. More info will be forthcoming forthcomingly.

All the Perl that's Practical to Extract and Report

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  • seems like a possible option.
  • Oh, neat trick. I never thought of that, thanks.

    BTW, it _should_ work on Windows, though I guess I'd have to see your implementation to understand why it doesn't. Windows does have LockFile and LockFileEx, which is how flock is implemented in Ruby on Windows. I would think Perl would have a very similar implementation.

  • #! /usr/bin/perl

    use Fcntl();

    sleep 2;

    print "Locking....\n";
    unless (flock(DATA, Fcntl::LOCK_EX())) {
        die("Failed to lock:$!");
    }
    print "Locked.....\n";
    sleep 5;

    __DATA__

    works for me on an XP virtual machine with strawberry perl.

    when doesn't it work?

  • Works for me with activeperl 5.8.8 but it is not printing failed to lock. I think the flock stops perl loading the script at all so nothing is executed but it is hard to tell without an error message of some sort.
  • Isn't that what Liz's Sys::RunAlone does? ;-)