All the data ends up in processeddata, no matter how much is read by a given call to sysread.

Oops, my bad. Actually, hm, I'm not sure what happens without the offset adjustments that I have in my code...

It doesn't look like you're handling ... other exceptional conditions

He does this too. Relevant code:

if( ! defined $length || $length == 0 ) { $err .= "Error from child: $!\n" unless defined $length; $select->remove($fh); }

That treats things like EINTR as "fatal" errors (stop listening on that $fh), which is probably not what he wants.

You removed select, which is cruicial here.

I was just commenting on the vagaries of sysread().


In reply to Re^3: I got IPC::Open3 to work! by siracusa
in thread I got IPC::Open3 to work! by harleypig

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.