Rails - Oct 2007 - How to Execute simple Linux Command from controller?

Folks,

   I am new to rails and have not found out how to do this. What I am
trying to do is execute a Linux command from one of my controllers.
For example, I''ve tried these 2 methods. Both result in a the web-page
to hang forever. I get NO response back.

   The question I have is, how do I execute a Linux command and then
parse the output from this command to take further action. Much
appreciated.

 def restore1
    render_text `uname -a`
  end

      or

def restore2
    io = IO.popen("uname -a")
    output = io.read
    io.close
end

Pete M.


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Not sure if this will help, but render_text is deprecated. Try using 
render :text => `uname -a`

I have successfully been able to execute shell commands and get the 
results back from within a Rails app, but I put them in a separate model 
class and returned the results in a method.
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petemo94-/E1597aS9LQAvxtiuMwx3w@public.gmane.org wrote:
> Folks,
> 
>    I am new to rails and have not found out how to do this. What I am
> trying to do is execute a Linux command from one of my controllers.
> For example, I''ve tried these 2 methods. Both result in a the
web-page
> to hang forever. I get NO response back.
> 
>    The question I have is, how do I execute a Linux command and then
> parse the output from this command to take further action. Much
> appreciated.
> 
>  def restore1
>     render_text `uname -a`
>   end
> 
>       or
> 
> def restore2
>     io = IO.popen("uname -a")
>     output = io.read
>     io.close
> end
> 
> Pete M.
u may need to require + include the file into the controller before 
being able to use it''s functionalities, ie:

require ''io''
class ExController

include IO
# now i can use the io.rb file''s methods :)
end

(the above very untested, i''m not sure exactly what file needs to be 
included, but this is the idea)

hope it helps :p
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Posted via http://www.ruby-forum.com/.

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