Shell Programming and Scripting

Hey guys.!
Need some help.I want to write a script , which should be continuosly running and should keep calling a function after every say 5 or 10 seconds.

I am done with almost all part of it, but figuring out how to keep the script continuosly running and how to keep calling a function after every 5 seconds.

Any help would be appreciated.

Try the following:

func()
{
echo "you are in function"
sleep 5
func
}

This function will call itself itself again and again with a time delay of 5 sec.
Or if you want to call the function directly from main you can use any infinite loop i.e for/while etc with atime delay of 5 secs.

Regards,
Yogi

Thanks! I had used a infinte while loop, but was trying to avoid it. I would use this method.

Thanks a lot!!

Why? A program which is supposed to keep on running forever sounds like the basic example of when you might need an infinite loop.

You might want to have a "guardian" cron job to verify that the process is always running. In case of resource exhaustion or something, the OS might kill off long-running processes (especially the infamously aggressive "oom-killer" in recent versions of Linux).

Thanks era! I am planning to put the script in crontab too!

Thanks all!
nua7

Also for a very long-running process, make sure it's not slowly hogging resources. Based on a brief test with Bash on Ubuntu Linux, the tail recursion suggested above will slowly eat up more and more memory. I'd definitely suggest an infinite loop instead.