Re: send command to parent shell

[Diez B. Roggisch]

Martin Landa landa.mar...@gmail.com writes:

 Hi,

 is there a way how to send command from python script to the shell
 (known id) from which the python script has been called? More
 precisely, the goal is to exit running bash (on Linux) or cmd (on
 Windows) directly from wxPython application, currently user needs to
 quit wxPython application and then underlaying command prompt by
 'exit' command.

Why is it started from the shell then in the first place? And if I did
it, I beg you to *not* close it... if I wanted that, I would have used 

 exec program

Diez
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Re: send command to parent shell

[Giampaolo Rodolà]

On Wed, 13 Oct 2010 06:30:15 -0700, Martin Landa wrote:
 is there a way how to send command from python script to the shell
 (known id) from which the python script has been called?

By using psutil (http://code.google.com/p/psutil/):

giampa...@ubuntu:~$ python
Python 2.6.6 (r266:84292, Sep 15 2010, 16:22:56)
[GCC 4.4.5] on linux2
Type help, copyright, credits or license for more information.
 import psutil, os
 me = psutil.Process(os.getpid())
 me.name
'python'
 parent = me.parent
 parent.name
'bash'
 parent.kill()


Regards,

--- Giampaolo
http://code.google.com/p/pyftpdlib/
http://code.google.com/p/psutil/
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Re: send command to parent shell

[Giampaolo Rodolà]

Sorry I realize now that you wrote how to send a command to the
shell and not how to kill the shell.
In this case I don't know exactly what you mean.



Regards,

--- Giampaolo
http://code.google.com/p/pyftpdlib/
http://code.google.com/p/psutil/

2010/10/14 Giampaolo Rodolà g.rod...@gmail.com:
 On Wed, 13 Oct 2010 06:30:15 -0700, Martin Landa wrote:
 is there a way how to send command from python script to the shell
 (known id) from which the python script has been called?

 By using psutil (http://code.google.com/p/psutil/):

 giampa...@ubuntu:~$ python
 Python 2.6.6 (r266:84292, Sep 15 2010, 16:22:56)
 [GCC 4.4.5] on linux2
 Type help, copyright, credits or license for more information.
 import psutil, os
 me = psutil.Process(os.getpid())
 me.name
 'python'
 parent = me.parent
 parent.name
 'bash'
 parent.kill()


 Regards,

 --- Giampaolo
 http://code.google.com/p/pyftpdlib/
 http://code.google.com/p/psutil/

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send command to parent shell

[Martin Landa]

Hi,

is there a way how to send command from python script to the shell
(known id) from which the python script has been called? More
precisely, the goal is to exit running bash (on Linux) or cmd (on
Windows) directly from wxPython application, currently user needs to
quit wxPython application and then underlaying command prompt by
'exit' command.

Thanks in advance, Martin
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Re: send command to parent shell

[Nobody]

On Wed, 13 Oct 2010 06:30:15 -0700, Martin Landa wrote:

 is there a way how to send command from python script to the shell
 (known id) from which the python script has been called?

For Unix, this should work, but in general it's the wrong thing to do:

import os
import signal
os.kill(os.getppid(), signal.SIGKILL)

This is a rather unfriendly way to kill the shell (it won't be able to
save its history, etc), and if the program was started from something
other than a shell, you might kill something you don't want to.

Using SIGHUP is more friendly and will probably work, but it could be
caught and/or ignored (for bash, SIGTERM, SIGQUIT and SIGINT /will/ be
ignored). If the shell can catch the signal in order to save its history,
it can catch it and ignore it.

There isn't a nice way to do it. There isn't supposed to be a nice way to
do it. Processes may control their children, but a child isn't supposed to
control its parent.

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