Example of using pty to control a process?

[morphex]

Hi,

I'm trying to get the output from the command top on Linux, using
python. I'd like to start top, get a page of output, and then send top
the letter 'q' to end the process.

Looking around I've figured that the module pty can be used for this,
however, I can't find any good examples of how to use it.
Any ideas as to where I can look?

Thanks,

Morten

[Grant Edwards]

Re: Example of using pty to control a process?

On 2005-01-06, morphex <morphex@gmail. com> wrote:
[color=blue]
> I'm trying to get the output from the command top on Linux, using
> python. I'd like to start top, get a page of output, and then send top
> the letter 'q' to end the process.[/color]

Man, you like to do things the hard way. Me OTOH, I'm lazy.
I'd use popen(), start top in "batch" mode and tell it to
execute one iteration.

import os
lines = os.popen("top -b -n 1","r").read(). split('\n')
print lines
[color=blue]
> Looking around I've figured that the module pty can be used
> for this, however, I can't find any good examples of how to
> use it. Any ideas as to where I can look?[/color]

I've you're dead set on using pty, I can tell you how to do it
in C, and maybe you can extrapolate.

--
Grant Edwards grante Yow! .. I think I'd
at better go back to my DESK
visi.com and toy with a few common
MISAPPREHENSION S...

[morphex]

Re: Example of using pty to control a process?

Oh right. I knew about the -b option, but not the -n 1 option (which
isn't required on FreeBSD). Thanks, I'll obviously use that instead!
:)

Regards,

Morten