Executing shell command in background from ruby with proper argument escaping

Question

I have to run a command in the background but I want to have proper escaping for its parameter.

system(\"rake send_mails subject=\'#{params[:subject]}\' 2>         


        

Answer 1

In Ruby 1.9, try Process.spawn:

# Spawn a new process and run the rake command
pid = Process.spawn({"subject" => params[:subject]},
                    "rake", "send_mails",
                    :out => 'dev/null', :err => 'dev/null')

# Detach the spawned process
Process.detach pid