sending ctrl C to a process

[s99999999s2003@yahoo.com]

hi
i have a program that works very similar to tail -f in Unix
It will need a Ctrl-C in order to break out of the program.
I wish to run this program using python (either thru os.system() or
some other subprocess modules) and how can i pass Ctrl-C to this
program to terminate it in python?
thanks

[Felipe Almeida Lessa]

Re: sending ctrl C to a process

Em Ter, 2006-03-28 às 18:14 -0800, s99999999s2003@ yahoo.com escreveu:[color=blue]
> It will need a Ctrl-C in order to break out of the program.
> I wish to run this program using python (either thru os.system() or
> some other subprocess modules) and how can i pass Ctrl-C to this
> program to terminate it in python?[/color]

$ python2.4 && echo " **** Python terminates!"
Python 2.4.2 (#2, Mar 27 2006, 21:07:39)
[GCC 4.0.3 (Debian 4.0.3-1)] on linux2
Type "help", "copyright" , "credits" or "license" for more information.[color=blue][color=green][color=darkred]
>>> ^C[/color][/color][/color]
KeyboardInterru pt[color=blue][color=green][color=darkred]
>>> try:[/color][/color][/color]
.... while 1:
.... pass
.... except KeyboardInterru pt:
.... print "\nHey, why did you press Ctrl-C?!"
.... except:
.... print "\nStrange. .."
....
^C
Hey, why did you press Ctrl-C?![color=blue][color=green][color=darkred]
>>> import sys
>>> try:[/color][/color][/color]
.... while 1:
.... pass
.... except KeyboardInterru pt:
.... sys.exit(0)
....
^C
**** Python terminates!
$

HTH,

--
Felipe.

[s99999999s2003@yahoo.com]

Re: sending ctrl C to a process

hi
thanks for the reply.Actually, i should clarify what i am doing.
the program's output will be displayed to a web browser using cgi, so
there is no
keyboard interrupt. The backend cgi script (python script) will have to
send Ctrl-C to break the program.
thanks

[Grant Edwards]

Re: sending ctrl C to a process

On 2006-03-29, s99999999s2003@ yahoo.com <s99999999s2003 @yahoo.com> wrote:[color=blue]
> hi
> thanks for the reply.[/color]

Please properly quote the article to which you're replying so
that we can tell who/what your talking to/about.
[color=blue]
> Actually, i should clarify what i am doing. the program's
> output will be displayed to a web browser using cgi, so there
> is no keyboard interrupt. The backend cgi script (python
> script) will have to send Ctrl-C to break the program.[/color]

Actually, you don't want to send a Ctrl-C to the program. You
want to send a SIGINT signal to the process. That's what the
tty line-discipline layer in the tty driver sends to processes
attached to a tty when the tty receives the interrupt character
(which defaults to Ctrl-C).

Sending signals to processes is done using os.kill()

http://docs.python.org/lib/os-process.html

--
Grant Edwards grante Yow! How do I get HOME?
at
visi.com