When kill does not work for a sudo process in a script?

[Peng Yu]

Hi,

When I finish running ./main.sh, the forever.sh sudo process will not
be terminated. But I tried to kill the forever.sh sudo process in
main.sh. But if I remove the two "sudo" words in main.sh, then the
forever.sh process can be terminated.

Does anybody know why the forever.sh sudo process will not be
terminated? Thanks.

==> forever.sh <==
#!/usr/bin/env bash
while true; do
        echo "$((++i))"
        sleep 1
done

==> main.sh <==
#!/usr/bin/env bash
sudo ./forever.sh &
pid=$!
sleep 5
sudo kill "$!"

-- 
Regards,
Peng