Timeout a ruby system call

I was rather disappointed that I could not set a timeout on a system call. This is especially a problem because of the very poor threading model that ruby currently has. But, at least there is a way to get the job done. The following is a method I wrote to make a system call and then kill it if the timeout is reached.

require 'timeout'
class System
def self.system_with_timeout(timeout, *args)
 if ( (pid = fork) == nil )
   #child process
   @@logger.debug(args.join(' '))
   exec(*args)
 else
   success = false
   #parent process
   begin
     #TODO if the process fails return false
     success = Timeout::timeout(timeout){ Process.waitpid(pid) }
   rescue Timeout::Error
     @@logger.error "***** Timeout error"
     Process.kill("HUP", pid)
     Process.detach(pid)
   end
   success
 end
end
end