Is their a way for a Child process to modify its Parent's environment?

[Jacob Carlborg via Digitalmars-d-learn]

On 2014-06-25 03:53, WhatMeWorry wrote:
> I open a command line window, and run the following 6 line program
>
> void main()
> {
>     string envPath = environment["PATH"];
>
>     writeln("PATH is: ", envPath);
>
>     envPath ~= r";F:\dmd2\windows\bin";
>
>     environment["PATH"] = envPath;
>
>     envPath = environment["PATH"];
>
>     writeln("PATH is: ", envPath);
>
> }
>
> It prints out the following
>
> PATH is: C:\Windows\system32;C:\Windows...
> PATH is: C:\Windows\system32;C:\Windows...F:\dmd2\windows\bin
>
> when the program exits, I'm back at the command line and I do a
>
> echo %PATH%
>
> which just shows C:\Windows\system32;C:\Windows...
>
> Anybody know of a way to make the change stick for the lifetime of the
> command window?

That's not possible. There is a workaround, DVM does something similar. 
Although, I don't remember how the code works for Windows but you can 
have a look at the code [1], or perhaps Nick can explain it.

[1] https://github.com/jacob-carlborg/dvm/blob/master/dvm/commands/Use.d#L34

-- 
/Jacob Carlborg