How would you go about this?

I would avoid fork and threads in the same program--but then on my platform I avoid fork at almost all costs.

On my platform (windows), each thread has it's own current working directory: 

c:\test>perl -Mthreads 
-le"@t = map{
    async(
        sub{ chdir shift;sleep 3;print`cd`}
    ,$_)
} qw[c:\\ c:\\test c:\\test\\_Inline];$_->join for @t"

c:\

c:\test

c:\test\_Inline

[download]

But I seem to remember that doesn't hold true for other platforms.

In any case, I'd simply do: 

system "cd $path && theProg @args";

[download]
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.
RIP an inspiration; A true Folk's Guy

In reply to Re^7: Multi-threads newbie questions by BrowserUk
in thread Multi-threads newbie questions by daverave

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.