Programmatic Parsing of ps

[octopusgrabbus]

I have Python 2.6.6. I would like to get this output

ps -ef | grep 'fglgo csm'

into a list. What is the best way to do that? I've been reading the
documentation, and am lost.

Thank you.
cmn

 

[Emile van Sebille]

On 2/9/2011 10:58 AM octopusgrabbus said...

I have Python 2.6.6. I would like to get this output

ps -ef | grep 'fglgo csm'

into a list. What is the best way to do that? I've been reading the
documentation, and am lost.

Thank you.
cmn

commands.getoutput

Emile

 

[Dan Stromberg]

On 2/9/2011 10:58 AM octopusgrabbus said...

commands.getoutput

Emile

Also, consider using "ps -eo pid,comm" (or similar) instead of ps -ef
- it should be easier to parse that way.

 

[bsergean]

If you're on Linux you should

* Have a look at the /proc/ filesystem, there's probably what you want
there.

Here's a small script that print all the pid/cmd from the process ran
with your user.

#!/usr/local/bin/python

import os
import re
import stat
from os.path import join

for pid in (pid for pid in os.listdir('/proc') if re.match('\d',
pid)):
cmdline_fn = join('/proc', pid, 'cmdline')
cmdline = open(cmdline_fn).read()
uid = os.stat(cmdline_fn)[stat.ST_UID]

if os.getuid() == uid:
print pid, cmdline


For a more cross-platform solution there's a module that does that (I
forgot it's name but with some googling you might find it)

 

[James Mills]

I have Python 2.6.6. I would like to get this output

ps -ef | grep 'fglgo csm'

into a list. What is the best way to do that? I've been reading the
documentation, and am lost.

Have you checked out psutil (1) to see if it
meets your needs ?

cheers
James

1. http://pypi.python.org/pypi/psutil/0.2.0

 

[Dan Stromberg]

FWIW, Linux' /proc is very different from pretty much all other *ix's.
I like Linux' design better, but it might be good to put the Linux
/proc assumption in one place, in case you need to port to another *ix
someday.

If you're on Linux you should

* Have a look at the /proc/ filesystem, there's probably what you want
there.

Here's a small script that print all the pid/cmd from the process ran
with your user.

#!/usr/local/bin/python

import os
import re
import stat
from os.path import join

for pid in (pid for pid in os.listdir('/proc') if re.match('\d',
pid)):
   cmdline_fn = join('/proc', pid, 'cmdline')
   cmdline = open(cmdline_fn).read()
   uid = os.stat(cmdline_fn)[stat.ST_UID]

   if os.getuid() == uid:
       print pid, cmdline


For a more cross-platform solution there's a module that does that (I
forgot it's name but with some googling you might find it)

Also, consider using "ps -eo pid,comm" (or similar) instead of ps -ef
- it should be easier to parse that way.