Here is the code for test.pl: 
use warnings;
use strict;

use Module::Load;

if(! $ENV{SPRING_WRITEDIR}) {
  $ENV{SPRING_WRITEDIR}='E:\\test';
  exec {$^X} ($^X,$0);
}
$ENV{PATH}="E:\\springrts;$ENV{PATH}";
load("PerlUnitSync");

PerlUnitSync::Init(0,0);
my $writeDir=PerlUnitSync::GetWritableDataDirectory();
print "writeDir=$writeDir\n";

[download]
Here is the output: 
E:\test>perl test.pl

E:\test>writeDir=E:\test\

[download]
And now the output if I comment the exec line: 
E:\test>perl test.pl
writeDir=D:\Documents\My Games\Spring\

[download]
As you can see the SPRING_WRITEDIR environment variable is not taken into account if I don't use exec.

In reply to Re^16: Using STDIN after exec() with ActiveState Perl by Yaribz
in thread Using STDIN after exec() with ActiveState Perl by Yaribz

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.