Terminate external script from Ruby using Timeout

Asked Jul 20 '17 at 01:12

Active Oct 08 '17 at 23:15

Viewed 183 times

I have an external script running in a timeout.

def perform(command)
  PTY.spawn(command) do |stdout_stderr, stdin, pid|
    begin
      do_stuff
    rescue Errno::EIO # always thrown when process completes
      do_more_stuff
    ensure
      Process.waitpid2(pid)
    end
  end
end

begin
  Timeout.timeout do
    perform('command_that_may_run_indefinitely')
  end
rescue Timeout::Error
  terminate_script_here
end

However, if the timeout times out, it needs to terminate the external script. How can I kill it?

edited Oct 08 '17 at 23:15

asked Jul 20 '17 at 01:12

PJSCopeland

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Duplicate? https://stackoverflow.com/questions/8292031/ruby-timeouts-and-system-commands – mahemoff Jul 20 '17 at 01:25
See that `pid` you're given? Kill it. – tadman Jul 20 '17 at 01:27
@mahemoff - not quite; I'm using `PTY`, not `` or `Process`. – PJSCopeland Jul 20 '17 at 23:09
@tadman - The question is where. I had simplified this example for StackOverflow; `PTY.spawn` is actually in a separate method, in fact in a separate file. I've updated the question to reflect the difference. – PJSCopeland Jul 20 '17 at 23:11
You'll need to capture that `pid` and make it available to your `rescue` block somehow. – tadman Jul 21 '17 at 00:57
Thank you Captain Obvious. _How?_ – PJSCopeland Jul 23 '17 at 21:00

Terminate external script from Ruby using Timeout

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