[fpc-pascal] Re: Linux: How to execute a program, but not towait until finishes

[Ludo Brands]

> -----Message d'origine-----
> De : fpc-pascal-bounces at lists.freepascal.org 
> [mailto:fpc-pascal-bounces at lists.freepascal.org] De la part 
> de Sven Barth
> Envoyé : mardi 19 juillet 2011 20:14
> À : fpc-pascal at lists.freepascal.org
> Objet : Re: [fpc-pascal] Re: Linux: How to execute a program, 
> but not towait until finishes
> 
> 
> On 19.07.2011 16:52, fred f wrote:
> > Hi,
> >
> > use this code, which starts itself, but when you close 
> first started 
> > the second ends as well, what I don't want.
> >
> >    with TProcess.Create (Application) do begin
> >      CommandLine := Application.ExeName + '&';
> >      Execute;
> >      Free;
> >    end;
> 
> If I remember correctly this is simply the way Unix behaves. If the 
> parent process terminates all children are terminated as 
> well. I don't 
> know how one can circumvent this.
> 

Orphans are reparented to PID 1, the init process.
Simple demonstration in a terminal
$ sh
$ gedit &
$ ps -l

You see that gedit is parented to the sh just launched.

$ exit
$ ps -l

gedit is still running but now parented to pid 1.

Ludo