I am on UNIX.

Forking kids is new to me. After looking around, I came up with this: 

    my $pid;

    ...

    if (!stat($png)) {

            $SIG{'CHLD'} = "wait_for_child";
            $pid = fork();
            if ($pid) {
                    "Creating thumbnail for: $pdf (pid $pid)\n";

            } else {
                    create_thumbnail($pdf,$png);
                    exit(0);
            }
    }

    sub wait_for_child {
            print "Waiting on $pid...";
            sleep(1);
    }

[download]

I haven't actually run the code yet for two reasons. This will generate all of them at the same time (forking a child for each PDF). And I don't have anything to check how long they are taking.

Can you add some pseudo code that would point me in the right direction?

Thanks!

In reply to Re^2: Setting an alarm by Rodster001
in thread Setting an alarm by Rodster001

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":


  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.