I'm trying to run it under win32 and it doesn't block, but it also doesn't appear to be forking. That is, the child process isn't running at all, yet the "die" doesn't happen, either. I'm also getting a "bad command or file name" message, which seems to be a result of the open($handle, "|-") call. Problem opening a pipe in a win32 machine?
Hang on - it isn't running under FreeBSD for me, either: 
Can't use an undefined value as a symbol reference at pipes.pl line 8.

[download]
and then it quits. Line 8 is: 
if (!defined($pid = open($handle, "|-"))) {

[download]
I'm just playing with this trying to learn. Sounds like the open is failing. What am I missing? Update: Well, I understand that $handle is undefined at that point. What I am wondering is what it should be.

In reply to Re^4: Non-blocking pipe write by melora
in thread Non-blocking pipe write by Marcello

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.