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Re: Avoid race condition with Popen.send_signal

Date 2012-01-03 16:09 +0100
From Jérôme <jerome@jolimont.fr>
Subject Re: Avoid race condition with Popen.send_signal
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Tue, 3 Jan 2012 06:12:59 -0800 (PST)
Adam Skutt a écrit:

> The conservative approach is to use another IPC mechanism to talk to
> the process, such as a pipe or a socket.  Why are you trying to send
> the child process SIGINT in the first place?

Say, you've got an application that plays a sound for a few seconds, using an
external program for that (beep, sox). If you close the application, you want
the sound to stop as well.

I don't know much about subprocess, not much more than what is in the
tutorial : http://docs.python.org/library/subprocess.html

(I don't know much about signalling either, I'm learning...)

I naively thought kill() was the "normal" way. Then realized terminate() or
even send_signal(SIGINT) would be softer.

What would be a good approach, then ?

Should I try something like this ?

	communicate(input="Ctrl+C")

(I'd need to figure out how to write Ctrl+C...)

Would that be cross-platform ?

-- 
Jérôme

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Thread

Re: Avoid race condition with Popen.send_signal Cameron Simpson <cs@zip.com.au> - 2012-01-03 12:44 +1100
  Re: Avoid race condition with Popen.send_signal Adam Skutt <askutt@gmail.com> - 2012-01-02 19:16 -0800
    Re: Avoid race condition with Popen.send_signal Cameron Simpson <cs@zip.com.au> - 2012-01-03 15:53 +1100
      Re: Avoid race condition with Popen.send_signal Adam Skutt <askutt@gmail.com> - 2012-01-03 06:52 -0800
    Re: Avoid race condition with Popen.send_signal Jérôme <jerome@jolimont.fr> - 2012-01-03 09:44 +0100
      Re: Avoid race condition with Popen.send_signal Adam Skutt <askutt@gmail.com> - 2012-01-03 06:12 -0800
        Re: Avoid race condition with Popen.send_signal Jérôme <jerome@jolimont.fr> - 2012-01-03 16:09 +0100
          Re: Avoid race condition with Popen.send_signal Adam Skutt <askutt@gmail.com> - 2012-01-03 09:58 -0800
            Re: Avoid race condition with Popen.send_signal Jérôme <jerome@jolimont.fr> - 2012-01-03 19:45 +0100
    Re: Avoid race condition with Popen.send_signal Chris Angelico <rosuav@gmail.com> - 2012-01-03 19:58 +1100
      Re: Avoid race condition with Popen.send_signal Adam Skutt <askutt@gmail.com> - 2012-01-03 06:20 -0800
    Re: Avoid race condition with Popen.send_signal Jérôme <jerome@jolimont.fr> - 2012-01-03 10:38 +0100
      Re: Avoid race condition with Popen.send_signal Adam Skutt <askutt@gmail.com> - 2012-01-03 07:03 -0800
        Re: Avoid race condition with Popen.send_signal Jérôme <jerome@jolimont.fr> - 2012-01-03 17:24 +0100
        Re: Avoid race condition with Popen.send_signal Jérôme <jerome@jolimont.fr> - 2012-01-03 18:25 +0100

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