cool thanks for the help. -shawn
On Wed, Dec 10, 2008 at 1:29 PM, Steve Willoughby <[EMAIL PROTECTED]> wrote: > On Wed, Dec 10, 2008 at 01:15:18PM -0600, shawn bright wrote: >> Sorry, was not very specific in my request. >> >> say i have a script like >> >> while 1: >> do_something_cool() >> time.sleep(2) > > Ah, ok. First of all, my preference would be to say "while True:" > there, seems more clear to me. A more complex program might have > different "do this forever" logic, but an infinite loop is pretty > common as well. > > The sleep is a very important step for making sure that the script > doesn't spin forever. Better would be to sleep as long as practical, > or wake up on some event (assuming you don't just need this to run > something every set interval of time). > >> i am running this on a linux computer. How would i check that it is >> running? (from cron part) > > Typically you have your program write its PID to a file. The cron > script can check that file and see if that process is still alive before > deciding to start another. > > Or, you could just look at the processes and look for your script by > name. > > Or any of a few other semaphore kinds of things (a file your script > touches periodically, and if it's more than n minutes old is a sign > your script has locked up/died is one simple example). > >> and how do i kick it off when i boot the computer? ( the init script part) > > Unix-like systems have a script run when the system is booted. BSD > systems usually put this is /etc/rc.local. Linux usually has a > directory of scripts, one per application, in /etc/init.d, with symlinks > from /etc/rc<n>.d indicating which run level <n> you want that service > started. See your distro's documentation for details specific to your > flavor of Linux. > > You'll want to run it in the background without any associated terminal. > In a Bourne-type shell, this usually looks like this: > > /path/to/myscript </dev/null >/dev/null 2>&1 & > > -- > Steve Willoughby | Using billion-dollar satellites > [EMAIL PROTECTED] | to hunt for Tupperware. > _______________________________________________ Tutor maillist - Tutor@python.org http://mail.python.org/mailman/listinfo/tutor
