'''
operating_system.py

Copyright 2013 Andres Riancho

This file is part of w3af, http://w3af.org/ .

w3af 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 version 2 of the License.

w3af 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 w3af; if not, write to the Free Software
Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
'''
import sys
import os
import logging

def check_if_root():
    if os.geteuid() == 0 or os.getuid() == 0:
        return
    
    print 'You need to be root to run the sentinela daemon.'
    sys.exit(1)

def run_command(cmd):
    logging.debug('Going to execute command "%s".' % cmd)
    os.system(cmd)
    
def change_working_directory():
    dirname = os.path.dirname(os.path.realpath(__file__))
    sentinela_root = os.path.join(dirname, '..', '..')
    os.chdir(sentinela_root)
    return sentinela_root
    