Re: redirecting stdout and stderr to /dev/null

From	Jim Dodgen <jim@dodgen.us>
Newsgroups	comp.lang.python
Subject	Re: redirecting stdout and stderr to /dev/null
Date	2016-05-07 20:49 -0700
Message-ID	<mailman.498.1462679399.32212.python-list@python.org> (permalink)
References	(1 earlier) <alpine.LSU.2.11.1605071151240.29512@znpeba.jbaqresebt.arg> <CAJ2wgcqYNZPap05ThA5YY048s_DYX45yPdt5RoVGXbtWAomWqQ@mail.gmail.com> <CAPTjJmodwRC8w29h35YM2=twNkifVT-=8+gSeY=oRdyLNfFC0A@mail.gmail.com> <85inypfhwm.fsf@benfinney.id.au> <CAJ2wgcqqP112GzLxtnhdXZ-NfvEPqHkL5i4b7u1JjgcZgyVKNw@mail.gmail.com>

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Great help.  My Python program is a rewrite of a Perl program I wrote. An
interesting exercise.
The reason being it is targeted for a Raspberry Pi  and for the Pi Python
has the most support.



*Jim Dodgen*







On Sat, May 7, 2016 at 6:38 PM, Ben Finney <ben+python@benfinney.id.au>
wrote:

> Chris Angelico <rosuav@gmail.com> writes:
>
> > On Sun, May 8, 2016 at 9:54 AM, Jim Dodgen <jim@dodgen.us> wrote:
> > > The empty token is needed but useless, it is arg[0] most people just
> > > repeat the program name
> >
> > Far from useless. It's how a process learns its own name, and yes,
> > repeating the image name is the most common way to provide that.
>
> In particular, a program's name may not be its file name; it can be
> called by one of several different names dependeing on how it is
> installed on the system.
>
> Certainly the programmer writing the code cannot hard-code what the
> command name will be that invokes the program. Only ‘sys.argv[0]’, read
> at run time, can tell.
>
> > Indeed. In fact, I would strongly recommend never using an explicit
> > fork/exec from Python - always use subprocess or equivalent. On
> > non-Unix platforms, fork/exec may not be available, but subprocess can
> > use other methods of invoking programs.
>
> I've already mentioned earlier, but to be sure: the ‘python-daemon’
> library <URL:https://pypi.python.org/pypi/python-daemon/> takes care of
> the details of becoming a Unix daemon process.
>
> --
>  \          “… a Microsoft Certified System Engineer is to information |
>   `\     technology as a McDonalds Certified Food Specialist is to the |
> _o__)                               culinary arts.” —Michael Bacarella |
> Ben Finney
>
> --
> https://mail.python.org/mailman/listinfo/python-list
>

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Re: redirecting stdout and stderr to /dev/null Jim Dodgen <jim@dodgen.us> - 2016-05-07 20:49 -0700

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