As a minor note, I would get rid of the nested if and replace that with an "and".

Update: fixed line wrap as per Ikegami's suggestion.
line length settings are different in my normal editor than PM. When I do complex multi-part if's requiring more than one line, I do it like below with the conditions on top of each other and the connecting "or" or "and" to the left. 

if ( defined($$keyptr) ) 
{
   my $datapos = $RSubtree{$curuser}{$$keyptr};
   if (     defined($datapos)       #update
        and GetDataRecord( $db, $keyptr, $dataptr, $datapos ) ) 
   {
       flock( $db->{btree}, LOCK_UN );
       return "";
    }  
 }

[download]
instead of: 

if ( defined($$keyptr) ) {
   my $datapos = $RSubtree{$curuser}{$$keyptr};
   if ( defined($datapos) ) {
      if ( GetDataRecord( $db, $keyptr, $dataptr, $datapos ) ) {
         flock( $$db{btree}, LOCK_UN );
         return "";
      }
   }
}

[download]

In reply to Re^2: How to eliminate warning message on hash value? by Marshall
in thread How to eliminate warning message on hash value? by flexvault

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.