Popen3 on Windows

[Jeffrey Barish]

I have an application that has been working fine on Linux, but now I need to
port it to Windows XP. The program uses Popen3 to run another program. I
use Popen3 so that I can access the pid attribute, which I use to kill the
auxiliary program when necessary. Popen3 does not exist on Windows. I see
os.popen2 and os.popen3, but they provide only file objects for stdin,
stdout, and stderr so I don't see a way to kill the auxiliary program that
I start. Is there a way to do this on Windows?
--
Jeffrey Barish

[SuperHik]

Re: Popen3 on Windows

Dennis Lee Bieber wrote:[color=blue]
> On Sat, 17 Jun 2006 11:46:29 -0600, Jeffrey Barish
> <jeff_barish@ea rthlink.net> declaimed the following in comp.lang.pytho n:
>[color=green]
>> I start. Is there a way to do this on Windows?[/color]
>
> There is no safe, easy, way to reliably kill a program on Windows...
>
> Hmmm, there's one I hadn't know about...
> http://www.tech-recipes.com/windows_tips446.html
> Ah, not supplied in WinXP Home (my desktop is Pro)
>
> Seems besides taskkill, there is also a tskill with different
> arguments...
>
> The M$ response
> http://support.microsoft.com/default...;en-us;178893&
>
>
> Granted, these don't explain how to get the PID in the first place
> from Python.
>
> If possible, try using the subprocess module... It seems to have a
> PID attribute.
>[/color]
from http://docs.python.org/dev/lib/module-subprocess.html
"""
16.1 subprocess -- Subprocess management

New in version 2.4.

The subprocess module allows you to spawn new processes, connect to
their input/output/error pipes, and obtain their return codes. This
module *intends to replace* several other, older modules and functions,
such as:

os.system
os.spawn*
os.popen*
popen2.*
commands.*
"""

[reed]

Re: Popen3 on Windows


Jeffrey Barish wrote:[color=blue]
> I have an application that has been working fine on Linux, but now I need to
> port it to Windows XP. The program uses Popen3 to run another program. I
> use Popen3 so that I can access the pid attribute, which I use to kill the
> auxiliary program when necessary. Popen3 does not exist on Windows. I see
> os.popen2 and os.popen3, but they provide only file objects for stdin,
> stdout, and stderr so I don't see a way to kill the auxiliary program that
> I start. Is there a way to do this on Windows?
> --
> Jeffrey Barish[/color]
[color=blue][color=green][color=darkred]
>>>import subprocess
>>>x = subprocess.Pope n('nc -l 22222')
>>>x.pid[/color][/color][/color]
2783[color=blue][color=green][color=darkred]
>>>subprocess.P open('taskkill %s' % x.pid)[/color][/color][/color]
<subprocess.Pop en object at 0x0184D410>[color=blue][color=green][color=darkred]
>>> x.poll()[/color][/color][/color]
1