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Re: [Help-bash] How to forbidden SIGINT be propagated from the parent sc

From: Peng Yu
Subject: Re: [Help-bash] How to forbidden SIGINT be propagated from the parent script to the child script?
Date: Fri, 29 May 2015 09:48:05 -0500

Is there a way to make any scripts (any their child scripts) called by
the main script not responsive to Ctrl-C?

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 ./
> 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.


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