Re: Regarding Process group ID

venkat wrote:
> 
> Hi folks,
> 
> I am a learner in Unix. While going through Process group ID, found
> that A process can set the process group ID of only itself or any of
> its children. Furthermore, it can't change the process group ID of
> one of its children after that child has called one of the exec
> functions.
> Not able to understand why?. Can some one explain why this behaviour
> is like this?.
> 
> Appreciate your help in this regard.

You'll have to ask somewhere else (perhaps comp.unix programmer?) to
get a definitive answer, as this is not C-related.  However, the
answer is basically "security".  You don't want just any old process
to be able to make such changes to running processes.

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