I'm writing a custom error-handling module for a steaming pile of CGIs that should rollback any active database handles, disconnect 'em, and choke out a nice, friendly message before dying. I'd like to be able to take advantage of HTML::Template with a default error template if possible, but to just spit out an HTML page if HTML::Template hasn't been loaded by the script that calls my module. Does anyone know of a reliable way to determine (from within the module) if the calling script has loaded another module? Is this the kind of thing for which I should just use eval()?
I'm also currently passing any active database handles manually into the module's functions. Is there a smart way to get a list of all active handles, so I don't have to trust myself to pass them to the error function?

Thanks much,

Ben

In reply to checking for preloaded modules by ben-at-geeklair

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.