Preventing propagation of SIGINT to Parent Process - Problem with the child

[jcdole]

Actually this seems to be bash-specific and starting with 5.0 bash changed behavior to pretend it also received SIGINT if child received SIGINT. By default it terminates bash. Out of curiosity I checked two shells that were installed besides bash here - mksh and dash. mksh runs both bash process and sleep in the same process group (even though it has -m option), so shell simply gets SIGINT when ^C is pressed. dash runs sleep in different process group so only sleep is killed by ^C but dash sends itself SIGINT in this case and so also terminates.

Too sophisticated for me. It is far from my knowledge.
Any way thank you for taking care of my questions.