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

[Greg Wooledge]

On Fri, May 29, 2015 at 09:48:05AM -0500, Peng Yu wrote:
> Is there a way to make any scripts (any their child scripts) called by
> the main script not responsive to Ctrl-C?

The obvious way is to ignore SIGINT:

trap '' INT

The less obvious way is to map the terminal driver's intr character to
something other than DEL (System V) or CTRL-C (BSD).  For example, to
undefine it completely:

stty intr ^-

Then CTRL-C (or DEL) becomes just another generic character.  (Debian's
stty also accepts undef instead of ^- but ^- appears to be the more
common/portable way.)

Of course, none of this prevents your script's child processes (once
you've run them) from returning intr or SIGINT to their standard settings.