what should program do if it started failed ?

[forstef]

In my case, there are something about checking environment when program is starting over. If the check things are not correct, the program should stop.
But what should I do to this framework if it check/start failed ?
I found if I put checking things in Start() and return no nil error , service still started successfully and seems normal, nothing wrong happened, you can also stop the service, but there was no program process in ps, the service entered the restart cycle to restart program continually.
when I put checking things in run() and return no nil error, service still started successfully and seems normal, nothing wrong happened, you can also stop the service, and there was a program process in ps.