Cron Problem.

[Anon]

I created a script which should run all the time since it captures data from a database table and use it as parameter for adding new user to the system. The problem is when I add this script (perl script) in my /etc/crontabs some of my daemons doesn't work anymore. What solutions can I implement to solve this problem?

jun

[Anon]

very vague. can you provide a bit more detail?

cron has nothing to do with the effect of your scripts. as you know all it does is that it acts as a scheduler nothing more.

hmmm.. its probable that the perl script exits prematurely (do you have exit codes) and that any code after that is disregarded/discarded.

try putting the perl script as the last item on your crontab if possible or run it separately to see if it does what is supposed to. as an alternative you can also re-run the daemons that have been shutdown by the script at the successful execution of your perl program.

hope that helps

[Anon]

Thanks.. Sorry if I haven't explained my problem cleary. I'm not that good in English. Anyway, I think I have found a solution. What i did was to create a script that runs all of my perl utility programs like signup daemon, change password daemon and timeout daemon. The main - daemon iterates every 2 seconds.. and executes
ps -ax and then. save the output into an array. Read the array for any process name that corresponds to the filename of my utility daemons. If a utility daemon is not running due to the possiblity of errors terminating it abnormally, the main-daemon re-runs the script in background. 🙂 My utility - daemons also make sure that there is no running instance of the same.

in a way, the cron executes my main-daemon

and my main-daemon executes my utility daemons...