[ILUG] Bash script - technical question

[David Pintor]

Hi,

I'm writing a bash script (for school) that gets an argument -F {timestamp}
where timestamp has the format HH:MM:SS.

This script will then look for some information in the system and will
update a log file every hh:mm:ss.

Because of the script requirements, I need to use the cron. This is easy
when SS=00 but not that easy if I want to run it, let's say, every 10
seconds. And much worse if I want to run it every 17 seconds... I think I
have to use sleep at some point as the cron doesn't accept seconds, probably
in a way like:

x x x x x script.sh
x x x x x sleep n ; script.sh
x x x x x sleep 2n ; script.sh
......
....

This seems to me like a pain to implement though. Not really asking for a
solution, but if anyone could give me an hint or suggest a different way to
look at this it would be great.

Thanks very much for your help!

David