question about the system method

[Jarod Zhu]

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

 

[Avdi Grimm]

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?

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/

--
Avdi

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[Jarod Zhu]

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

Jarod Zhu