Question about the system method

ruby-talk
1

Hi, all

     I want to use system method to run a background process, like

     system("ruby deamon.rb") # the deamon.rb runs a dead loop

     When my main process ends, I want to end the background process
too.

     How can I do it?

     If I can get the pid of background process, I can use
Process.kill. But the system method dosen't return the pid.

     Does anyone here know the solution?

     Thank you

Jarod Zhu

2

The basic answer is to use IO.popen() - see
http://www.ruby-doc.org/core/classes/IO.html#M002267

For more advances applications you may want to take a look at Daemons:
http://daemons.rubyforge.org/

···

On Mon, Dec 1, 2008 at 12:29 PM, Jarod Zhu <zhujie2003info@gmail.com> wrote:

Hi, all

    I want to use system method to run a background process, like

    system("ruby deamon.rb") # the deamon.rb runs a dead loop

    When my main process ends, I want to end the background process
too.

    How can I do it?

--
Avdi

Home: http://avdi.org
Developer Blog: Avdi Grimm, Code Cleric
Twitter: http://twitter.com/avdi
Journal: http://avdi.livejournal.com

3

IO.popen() works well.
Thanks a lot!!

Jarod Zhu

···

For more advances applications you may want to take a look at Daemons:http://daemons.rubyforge.org/

--
Avdi

Home:http://avdi.org
Developer Blog:Avdi Grimm, Code Cleric
Twitter:http://twitter.com/avdi
Journal:http://avdi.livejournal.com