Sleep is an executable that we can use to simulate a blocking process for the purposes of demonstrating how to handle child processes.
Here's our base case.
The execution pattern is going to occur in this way: zsh (interactive) -> bash (./parent.sh) -> bash (./child.sh) -> sleep. Because both Bash processes performed an exec without fork, the bash (./parent.sh) process will be replaced by Bash (./child.sh), which itself will be replaced by sleep. This will mean that there are no child processes to manage except for the immediate child of sleep. Upon sending SIGINT, the sleep process will be terminated, and there will be no resource leak. No orphaned nor zombie processes.
./parent.sh:
