Script / cron job which checking command is running or run it automatically?

Since /etc/init.d/znc script is not working for me i need to use this command

sudo -u znc znc -d /mnt/sda1/.znc

I need that to keep running after crash, system reboot,
Is there some "general" script for case like that?

Yeh, should be able to stick that into /etc/rc.local