# -*- coding: utf-8 -*-

#+---------------------------------------------------------------------------+
#|          01001110 01100101 01110100 01111010 01101111 01100010            |
#|                                                                           |
#|               Netzob : Inferring communication protocols                  |
#+---------------------------------------------------------------------------+
#| Copyright (C) 2011 Georges Bossert and Frédéric Guihéry                   |
#| This program is free software: you can redistribute it and/or modify      |
#| it under the terms of the GNU General Public License as published by      |
#| the Free Software Foundation, either version 3 of the License, or         |
#| (at your option) any later version.                                       |
#|                                                                           |
#| This program is distributed in the hope that it will be useful,           |
#| but WITHOUT ANY WARRANTY; without even the implied warranty of            |
#| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the              |
#| GNU General Public License for more details.                              |
#|                                                                           |
#| You should have received a copy of the GNU General Public License         |
#| along with this program. If not, see <http://www.gnu.org/licenses/>.      |
#+---------------------------------------------------------------------------+
#| @url      : http://www.netzob.org                                         |
#| @contact  : contact@netzob.org                                            |
#| @sponsors : Amossys, http://www.amossys.fr                                |
#|             Supélec, http://www.rennes.supelec.fr/ren/rd/cidre/           |
#+---------------------------------------------------------------------------+

#+---------------------------------------------------------------------------+
#| Standard library imports
#+---------------------------------------------------------------------------+
from gettext import gettext as _
import subprocess

#+---------------------------------------------------------------------------+
#| Local Imports
#+---------------------------------------------------------------------------+
from netzob.Common.Process import Process


#+---------------------------------------------------------------------------+
#| ExecutionContext:
#|    A set of methods to extract the current
#|    context of the execution (processes,
#|    env vars, ...)
#+---------------------------------------------------------------------------+
class ExecutionContext(object):

    def __init__(self):
        pass

    @staticmethod
    def getCurrentProcesses():
        result = []
        ps = subprocess.Popen(['ps', 'aux'], stdout=subprocess.PIPE).communicate()[0]
        processes = ps.split('\n')
        # this specifies the number of splits, so the splitted lines
        # will have (nfields+1) elements
        nfields = len(processes[0].split()) - 1
        for row in processes[1:]:
            infos = row.split(None, nfields)
            if len(infos) > 1:
                user = infos[0]
                pid = infos[1]
                cmd = infos[len(infos) - 1]
                process = Process(cmd, pid, user)
                result.append(process)

        return result
