# $Id$
# $URL$

"""Trellis configurator.  Toggles network namespace based on slice attribute"""

import logger
import os
from sets import Set

def start(options, config):
    pass

def GetSlivers(data):
    """For each sliver with the netns attribute, write the value to /etc/vservers/<slice>/spaces/net"""
    # Parse attributes and update dict of scripts
    for sliver in data['slivers']:
        for attribute in sliver['attributes']:
            if attribute['name'] == 'netns':
                writeConf(sliver['name'], attribute['value'])

def writeConf(slicename, value):
    SLICEDIR="/etc/vservers/%s/" % slicename
    SPACESDIR="%s/spaces/" % SLICEDIR
    if os.path.exists(SLICEDIR):
        if not os.path.exists(SPACESDIR):
            try:
                os.mkdir(SPACESDIR)
            except os.error:
                logger.log("trellis: could not create %s\n" % SPACESDIR)
                return
        f = open("%s/net" % SPACESDIR, "w")
        f.write("%s\n" % value)
        f.close()