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Subject: Re: detecting child processes?
Date: Sun, 11 May 2014 21:12:47 +0200
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On 11.05.2014 19:59, Rod Pemberton wrote:

> I have a process which spawns a child of itself via system().
>
> Although the parent and child are the same application, I'd now
> like the child to function slightly differently from the parent.

I'll assume you're referring only to the case where the parent process 
is this same program, rather than your program being invoked as any 
arbitrary other program's child process.

> To do that, I need to be able to detect that the child is not
> the parent.

So make the parent _tell_ the child: set an environment variable like 
"PAPA_ALREADY_THERE", pass a command line argument to the child, or 
whatever you like.