Short answer: You cannot with Proc::Simple (longer: in your case when starting a sub{...} as a child process)

This is what happens in the child part of the fork() that is executed for your $func = sub{...}; 

# in Proc::Simple
# $func = sub{ ... }; # your code
...
if(ref($func) eq "CODE") {
   $self->dprt("Launching code");
   $func->(@params); exit 0;            # Start perl subroutine
} else { 
...

[download]
So, the exit 0 (successful execution) is all that is returned from your sub{...}. The $return value is discarded.

Your sub{...} could return the result to the main process by means of IPC or by storing the result in a temporary file (e.g. YAML, JSON, Storable, etc.). The parent process could read the result from a pipe or load the serialised data from a file after the sub has finished.
Update: IPC::Lite

However, I guess, that in this particular case, you're better off with threads and maybe a queue.

In reply to Re: Proc::Simple store return from background process by Perlbotics
in thread Proc::Simple store return from background process by perldarren

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.