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Re: Piping processes works with 'shell = True' but not otherwise.

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On Sun, May 26, 2013 at 4:58 PM, Luca Cerone <luca.cerone@gmail.com> wrote:
<snip>
> Hi Chris, first of all thanks for the help. Unfortunately I can't provide the actual commands because are tools that are not publicly available.
> I think I get the tokenization right, though.. the problem is not that the programs don't run.. it is just that sometimes I get that error..
>
> Just to be clear I run the process like:
>
> p = subprocess.Popen(['program1','--opt1','val1',...'--optn','valn'], ... the rest)
>
> which I think is the right way to pass arguments (it works fine for other commands)..
<snip>
>> You may also want to provide /dev/null as p1's stdin, out of an abundance of caution.
>
> I tried to redirect the output to /dev/null using the Popen argument:
> 'stdin = os.path.devnull' (having imported os of course)..
> But this seemed to cause even more troubles...

That's because stdin/stdout/stderr take file descriptors or file
objects, not path strings.

Cheers,
Chris

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Thread

Piping processes works with 'shell = True' but not otherwise. Luca Cerone <luca.cerone@gmail.com> - 2013-05-24 07:04 -0700
  Re: Piping processes works with 'shell = True' but not otherwise. Luca Cerone <luca.cerone@gmail.com> - 2013-05-26 03:31 -0700
  Re: Piping processes works with 'shell = True' but not otherwise. Chris Rebert <clp2@rebertia.com> - 2013-05-26 14:05 -0700
    Re: Piping processes works with 'shell = True' but not otherwise. Luca Cerone <luca.cerone@gmail.com> - 2013-05-26 16:58 -0700
      RE: Piping processes works with 'shell = True' but not otherwise. Carlos Nepomuceno <carlosnepomuceno@outlook.com> - 2013-05-27 03:14 +0300
        Re: Piping processes works with 'shell = True' but not otherwise. Thomas Rachel <nutznetz-0c1b6768-bfa9-48d5-a470-7603bd3aa915@spamschutz.glglgl.de> - 2013-05-29 19:39 +0200
          RE: Piping processes works with 'shell = True' but not otherwise. Carlos Nepomuceno <carlosnepomuceno@outlook.com> - 2013-05-29 22:31 +0300
          Re: Piping processes works with 'shell = True' but not otherwise. Cameron Simpson <cs@zip.com.au> - 2013-05-30 08:18 +1000
      Re: Piping processes works with 'shell = True' but not otherwise. Chris Angelico <rosuav@gmail.com> - 2013-05-27 18:28 +1000
        Re: Piping processes works with 'shell = True' but not otherwise. Luca Cerone <luca.cerone@gmail.com> - 2013-05-27 04:33 -0700
      Re: Piping processes works with 'shell = True' but not otherwise. Chris Rebert <clp2@rebertia.com> - 2013-05-29 10:17 -0700
        Re: Piping processes works with 'shell = True' but not otherwise. Luca Cerone <luca.cerone@gmail.com> - 2013-05-31 02:28 -0700
          Re: Piping processes works with 'shell = True' but not otherwise. Peter Otten <__peter__@web.de> - 2013-05-31 11:52 +0200

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