Crontabbing a Ruby script inside a screen

[Volodymyr Kostyrko]

24.01.2013 13:27, Dwayne Henderson:
> Hi, I run this Ruby + Sequel script inside a screen that records data from
> this live stream 24/7. But it tends to core dump every once in a while, and
> since I run it in a screen (so it's easy to check in on), I can't really
> scroll up to catch the error whenever it happens.
>
> So how do I crontab the screen with the Ruby script inside it? Has to be
> with a "don't run it if it's already running" check to avoid fatal
> consequences. So far I have:
>
> $ crontab -e
>
> */10 * * * * lockf -t 0 /home/anonymous/.myscript.rb.lock
> /usr/local/bin/screen -d -m -S myscript
> /home/anonymous/.rvm/rubies/ruby-1.9.3-p0/bin/ruby
> /home/anonymous/myscript.rb

Another suggestion would be using daemon(8) with -r option.

-- 
Sphinx of black quartz, judge my vow.