Inter-process locking

[Jason Friedman]

The lockfile solution seems to be working, thank you.

On Fri, Oct 11, 2013 at 10:15 PM, Piet van Oostrum <piet at vanoostrum.org> wrote:
> Jason Friedman <jsf80238 at gmail.com> writes:
>
>> I have a 3rd-party process that runs for about a minute and supports
>> only a single execution at a time.
>>
>> $ deploy
>>
>> If I want to launch a second process I have to wait until the first
>> finishes.  Having two users wanting to run at the same time might
>> happen a few times a day.  But, these users will not have the
>> skills/patience to check whether someone else is currently running.
>> I'd like my program to be able to detect that "deploy" is already
>> running, tell the user, wait a minute, try again, repeat.
>>
>> I do not know whether anyone has had success with
>> http://pythonhosted.org/lockfile/lockfile.html.
>
> It seems to work on Mac OS X.
>
>> I supose I could use http://code.google.com/p/psutil/ to check for a
>> process with a particular name.
>
> That will quite probably give you race conditions.
>
> File locking is generally the best solution for this kind of problems, unless you can make use of OS level semaphores.
> --
> Piet van Oostrum <piet at vanoostrum.org>
> WWW: http://pietvanoostrum.com/
> PGP key: [8DAE142BE17999C4]
> --
> https://mail.python.org/mailman/listinfo/python-list