Re: sockets,threads and interupts

Newsgroups	comp.lang.python
Date	2012-09-05 09:02 -0700
References	<4d1ffb61-38b6-42fb-9426-c1c7cb7038a0@googlegroups.com>
Message-ID	<8aee6e43-82fd-42a4-aa9f-ff626145577d@ou2g2000pbc.googlegroups.com> (permalink)
Subject	Re: sockets,threads and interupts
From	Bryan <bryanjugglercryptographer@yahoo.com>

Show all headers | View raw

loial wrote:
> I have threaded python script that uses sockets to monitor network ports.
>
> I want to ensure that the socket is closed cleanly in all circumstances. This includes if the script is killed or interupted in some other way.
>
> As I understand it signal only works in the main thread, so how can I trap interupts in my threaded class and always ensure I close the socket?

You may have various threads waiting in blocking calls, and I don't
think there's a good way to alert them. Closing sockets that other
threads may be waiting on is "probably unwise" according to Linux man
page on close(2).

Do you really need to worry about it? If your process is being
forcibly terminated you probably cannot do anything better than the OS
will do by default.

-Bryan

Back to comp.lang.python | Previous | Next — Previous in thread | Find similar | Unroll thread

Thread

sockets,threads and interupts loial <jldunn2000@gmail.com> - 2012-09-04 08:26 -0700
  Re: sockets,threads and interupts MRAB <python@mrabarnett.plus.com> - 2012-09-04 18:06 +0100
    Re: sockets,threads and interupts Grant Edwards <invalid@invalid.invalid> - 2012-09-04 18:11 +0000
      Re: sockets,threads and interupts Ramchandra Apte <maniandram01@gmail.com> - 2012-09-04 20:43 -0700
  Re: sockets,threads and interupts Dieter Maurer <dieter@handshake.de> - 2012-09-05 07:56 +0200
    Re: sockets,threads and interupts Ramchandra Apte <maniandram01@gmail.com> - 2012-09-05 05:54 -0700
      Re: sockets,threads and interupts Chris Angelico <rosuav@gmail.com> - 2012-09-05 23:04 +1000
        Re: sockets,threads and interupts Ramchandra Apte <maniandram01@gmail.com> - 2012-09-05 08:59 -0700
        Re: sockets,threads and interupts Ramchandra Apte <maniandram01@gmail.com> - 2012-09-05 08:59 -0700
          Re: sockets,threads and interupts Ramchandra Apte <maniandram01@gmail.com> - 2012-09-05 09:01 -0700
          Re: sockets,threads and interupts Ramchandra Apte <maniandram01@gmail.com> - 2012-09-05 09:01 -0700
      Re: sockets,threads and interupts Dennis Lee Bieber <wlfraed@ix.netcom.com> - 2012-09-05 13:15 -0400
    Re: sockets,threads and interupts Ramchandra Apte <maniandram01@gmail.com> - 2012-09-05 05:54 -0700
  Re: sockets,threads and interupts Bryan <bryanjugglercryptographer@yahoo.com> - 2012-09-05 09:02 -0700

csiph-web