[Lazarus] How to add & change application EnvironmentList ?

[Michael Van Canneyt]

On Wed, 26 Aug 2015, FreeMan wrote:

> On 26.08.2015 22:22, Michael Van Canneyt wrote:
>> I understand this. That is exactly what AProcess.Environment does.
>> 
>> Michael.
>
>      AProcess.Environment.Add('LD_LIBRARY_PATH=' + fb_RootPath);
>      AProcess.Environment.Add('FIREBIRD=' + fb_RootPath);
>      for I := 0 to GetEnvironmentVariableCount do begin
>        AProcess.Environment.Add(GetEnvironmentString(I));
>        Form1.Memo1.Lines.Add(AProcess.Environment.Strings[I]);
>      end;
>
>      Form1.Memo1.Lines.Add('');
>      Form1.Memo1.Lines.Add('-------------------------------');
>      Form1.Memo1.Lines.Add('--------------------');
>      Form1.Memo1.Lines.Add('');
> Application.GetEnvironmentList(Form1.Memo1.Lines);
>
> this is result:
> 1-) AProcess.Environment result
> LD_LIBRARY_PATH=/opt/proje_laz/projeler/shared/firebird/Embeded/test/fb_embed_linux64/
> FIREBIRD=/opt/proje_laz/projeler/shared/firebird/Embeded/test/fb_embed_linux64/
> KDE_FULL_SESSION=true
> KDE_FULL_SESSION=true
> GNOME_KEYRING_PID=1900
> GS_LIB=/home/freeman/.fonts
>
> ................................
> ................................
>
> 2-)Application.GetEnvironmentList  result
> KDE_FULL_SESSION=true
> GNOME_KEYRING_PID=1900
> GS_LIB=/home/freeman/.fonts
>
>
> var AProcess: TProcess;
> AProcess := TProcess.Create(Application);
>
> AProcess is different class, is that synchronous with main application's 
> EnvironmentList ?

For the newly started process, yes. 
Not for the CURRENT process.

> My test is say no. It's not work in same session. For test 
> I made bash sript, I wrote in export bla bla then execute it with tprocess, 
> but not added to application's EnvironmentList.

In the calling program: Of course not. only in the called program.

I use this technique to provide environment parameters to a newly started program since many years.

Michael.