[Help-bash] Can a child script know the pid parent script of the progress id?

[Peng Yu]

Hi,

Is there a way for the child script to know which process group it
belongs to? Thanks.

On Fri, May 29, 2015 at 7:08 AM, Greg Wooledge <address@hidden> wrote:
> On Fri, May 29, 2015 at 12:23:24AM -0500, Peng Yu wrote:
>> The following shows that SIGINT is propagated to ./script.sh.
>
> Are you talking about keyboard-generated signals (Ctrl-C), or signals
> sent to a single process via the kill command?
>
> If you run a script from a terminal, in the foreground, and that script
> runs some other program synchronously (in the foreground), and you press
> Ctrl-C on your keyboard while focused on that terminal, the SIGINT will be
> sent to EVERY foreground process.  This is not "propagation".  It is not
> one process receiving the signal and passing it along to its children.
> Processes do not do that.  If you wanted that, you would have to code
> it yourself.
>
> Keyboard-generated signals are sent by the terminal driver to every
> foreground process at once.

-- 
Regards,
Peng