not exactly. from the sysread doc:

Returns the number of bytes actually read, 0 at end of file, or undef if there was an error.
this is the full logic, but it can be condensed to fit your needs.

if( defined $read_bytes )
{
  if( $read_bytes >= 0 )
  {
    print 'read something';

    if( $read_bytes == $num_bytes )
    {
      print 'read full buffer';
    }
    elsif( $read_bytes < $num_bytes )
    {
      print 'buffer length: ', $num_bytes, '  read length: ', $read_by
+tes;
    }
    else
    {
      die 'how did i get here?';
    }
  }
  elsif( $read_bytes == 0 )
  {
    print 'EOF';
  }
  else
  {
    die 'how did i get here?';
  }
}
else
{
  die 'error reading socket';
}

[download]

~Particle *accelerates*

In reply to Re^4: Win32 fork using open3 by particle
in thread Win32 fork using open3 by NaSe77

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.